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What is the molecular formula?
Gold (II) oxide
A mixture of three gases (ar, ne, and co2) has a total pressure of 1.2 atm. if the mixture of gases is composed of 25.0 g of each gas, what is the partial pressure of ne?
Answer: The first task is to determine the moles of each gas present. This makes use of the molar masses of each gas. The molar masses are:
Molar Mass Ar = 39.948 grams per mole
Molar Mass Ne = 20.1797 grams per mole
Molar Mass CO2 = 44.01 grams per mole
Calculating for the moles of each gas present, we get.
(In the png attatched.)
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For each of the following elements, use the periodic table to give the chemical symbol, atomic number, and the group number of each element, and to specify whether each element is a metal, metalloid, or nonmetal.
Rubidium b. germanium c. Magnesium
d. Titanium e. iodine f. Strontium
a) Rubidium: It is a chemical element with chemical symbol Rb.
Atomic no.: 37
Group: group 1 and first Alkali metal in the group to have density higher than water.
Discovery: Robert Bunsen and Gustav Kirchhoff
b) Germanium: It is a chemical element with the chemical symbol Ge.
Atomic no.: 32
Group: Group 14 Carbon group, a grayish white metalloid in the carbon group.
Discovery: Clemens Winkler
c) Magnesium: It is a chemical element with a chemical symbol of
Atomic no. : 12
Group: group 2(llA) of the periodic table and the chemical properties with the other five alkaline earth metals.
Discovery: Joseph Black
d) Titanium: It is a chemical formula with a chemical symbol of Ti
Atomic no. : 22
Group : group 4 (IVb) of the periodic table a silver grey white metallic appearance.
Discovery : William Gregor
e) Iodine : Iodine is a chemical element with a chemical symbol I.
Atomic no. : 53
Group: group 7A of the periodic table, which is a non metallic at a standard conditions.
Discovery: Bernard Courtois
f) Strontium: It is a chemical element with the symbol Sr.
Atomic no. : 38
Group : group 2(alkaline earth metal) which is a soft silver white yellowish metallic element.
Discovery: William Cruickshank
Refer to the attached Periodic Table and link for further information,
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What happens in the process of beta decay?
Answer:
Beta decay is a radioactive decay in which a beta ray is emitted from an atomic nucleus. During beta decay, the proton in the nucleus is transformed into a neutron and vice versa. If a proton is converted to a neutron, it is known as β+ decay. Similarly, if a neutron is converted to a proton, it is known as β– decay.
ammonia, an important source of fixed nitrogen that can be metabolized by plants, is produced using the haber process in which nitrogen and hydrogen combine.n2(g) 3h2(g) → 2nh3(g)how many grams of nitrogen are needed to produce 325 grams of ammonia?
Using a stoichiometric calculation, it was determined that 178.43 grams of nitrogen are needed to produce 325 grams of ammonia.
We can use a simple stoichiometric proportion to calculate this. First, we write the reaction:
[tex]N_{2} + 3H_{2}[/tex] → [tex]3 NH_{3}[/tex]
We can see that 1 mole of nitrogen produces 2 moles of ammonia.
Nitrogen's molar mass is 2 * 14 = 28 g/mol.
The molar mass of ammonia is 14 + 3 * 1 = 17 g/mol.
Based on this and the reaction equation, we can say that 28 grams of nitrogen produce 3 mol * 17 g/mol = 51 g of ammonia.
Now, we make a proportion:
28 g of nitrogen : 51 g of ammonia = X : 325 g of ammonia
X = 28 g of nitrogen * 325 g of ammonia / 51 g of ammonia = 178.43 g of nitrogen
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the table shows the chemical formulas for four substances 1 C2H6O 2 C8H18 3 CH3CH2Br 4C4H10 wich substance has the same umber of carbon atoms
The chemical formula of the substances that has the same number of carbon atoms are:
C₂H₆OCH₃CH₂BrWhat is a chemical formula?A chemical or molecular formula is a notation indicating the number of atoms of each element present in a compound.
A subscript, which is a number written below another letter or number, is used to show the number of atoms of each element in a chemical compound.
According to this question, four chemical formulas were given as follows:
C₂H₆OCH₃CH₂BrC₈H₁₈C₄H₁₀However, only C₂H₆O and CH₃CH₂Br contains an equal number of carbon atoms of 2.
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What is the environmental impact of extracting minerals from the ground?
Responses
increases available industry jobs
damages available extraction technology
causes air, water, and soil pollution
immediately depletes the global supply
The practice that would decrease the impact of extracting minerals for smartphones is the properly disposing of mining waste.
Why does manufacturing smartphones have a negative impact?
Most modern smartphones require use of minerals such as copper, tungsten, and cobalt for manufacturing.
These minerals have to be extracted from soil and this has a huge negative impact on ecosystems.
The consequences can include soil erosion, sinkholes, biodiversity loss, and contamination of surface, ground, and freshwater resources by chemicals released during mining operations. Carbon emissions from these activities also have an impact on the atmosphere, which in turn affects biodiversity and human health.
Therefore, the Option D is correct.
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A wilting flower placed in water will be revived as water pressure in the plant cells increases. This change is brought about as a result of what process?.
When a withering flower is immersed in water, it will be revived as the water pressure in the plant cells rises, and hence the cells pull ups water through osmosis.
Wilting is defined as the loss of stiffness in non-woody plant components. This occurs as a result of the cells containing less water, which causes the turgor pressure in the non-lignified cell to decrease toward zero. If the solution is considerably diluted, meaning that the concentration of water inside the cell is lower than that of the medium surrounding the cell, then in this scenario, osmosis will take place and the cell will osmotically absorb water, and the cell will become turgid.
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How many protons are found in 12C? 13 C? 13 C-?
Explanation:
12C , 13C , and 14C ARE ALL elemental carbon. Because each isotope has 6 protons , 6 positively charged, massive nuclear protons, and different numbers of neutrons.
is KCN ionic or covalent (i need soeone to write me a cute small paragrah abut this please)
From the idea that the KCN is made of two ions of opposite charge, then the compound is ionic.
Is KCN ionic or covalent?We can say that a compound is ionic if the compound that is in question is composed of ions. Note that ions are species that are positively or negatively charged. As such, ionic compounds are essentially an ion pair and they are different from the covalent compounds.
The compounds that are covalent are the compounds that are forms when two atoms share electrons in a bond. In this case, there are no ions and we do not have species that have a full positive or negative charge as we do have with the ionic compounds that we discussed earlier here.
As we can see, the KCN compound is composed of the potassium ion that is positively charged as well as the cyanide ion that is negatively charged thus the compound must be said to be an ionic compound.
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Please give answer with explanation.
Johannes Kepler was a German astronomer who lived in the 17th century. He was the first scientist to accurately describe the motions of the planets around the Sun with mathematics. More than 50 years after his death, an English physicist named Isaac Newton developed a mathematical theory of gravity that applied to all objects, not just planets.
The example described above suggests that
A.
scientific knowledge is never correct because it is constantly changing as new theories are developed and discoveries are made.
B.
scientists tend to all come from the same region and live during the same time period.
C.
scientists who make contributions to scientific knowledge often come from different backgrounds and live at different times.
D.
scientific knowledge does not change through time because the earliest scientists were totally correct.
Scientists who make contributions to scientific knowledge often come from different backgrounds and live at different times. Option C.
The planets are in elliptical motion around the sun. The figure below shows two orbits with the same semimajor axis, focus, and orbital period. One is a circle with an eccentricity of 0.0. The other is an ellipse with an eccentricity of 0.8. Johannes Kepler was a German mathematician and astronomer who discovered that the earth and planets orbit the sun in elliptical orbits.
He gave his three basic laws of planetary motion. He also did important work in optics and geometry. Johannes Kepler is best known for his three laws of planetary motion. These laws are: Planets move in orbits shaped like ellipses. The lines between the planets and the sun cover equal areas in equal time. He formulated the law of universal gravitation. He identified the first moons of Jupiter. He collected detailed data that led to the proposal of the heliocentric model.
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Please help me. I really don’t understand this
[tex]0.1158 \10^{-3} times[/tex] mol of NaOH is needed to neutralise 36.1 ml of potassium hydroxide solution.
[tex]To\ determine\ the mass \ of {KHP}$ reaquired. \\we should first determine the number of moles of $\mathrm{NaOH}$ present is $3.21 \mathrm{~mL}$ of $36.1 \mathrm{M} \mathrm{MNaOH}$ solution.Moles of $\mathrm{NaOH}=$ molonity of $\mathrm{NaOH}$ $x$ solution of $\mathrm{NaOH}$ in $(\mathrm{L})$[/tex]
[tex]$$\begin{aligned}&=36.1\frac{\mathrm{mol}}{\mathrm{K}} \times \frac{3.21}{1000} \mathrm{~K} \\&=0.1158 \times 10^{-3} \mathrm{~mol} \text { of } \mathrm{NaOH}\end{aligned}$$[/tex]
What are moles?moles are the a standard scientific unit used to measure large quantities of very small entities such as atoms, molecules, or other defined particles. A mole means a very large number of units, 6.0221076 × 1023.
The number of atoms or other particles in a mole is the same for all substances. A mole is related to the mass of an element as follows:
one mole of carbon-12 atoms is 6.0221076 × 1023 atoms and has a mass of 12 grams. By comparison, one mole of oxygen, by definition, consists of the same number of atoms as carbon-12, but has a mass of 15,999 grams. Therefore, the mass of oxygen is greater than the mass of carbon. This reasoning can also be applied to molecular weights or formula weights.
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Write the equation for the beta decay of Beryllium-10. (Beryllium is element number 4)
POSSI
The equation for the beta decay of Beryllium-10 is 10^ 4 Be =0^ -1 β + 10^ 5Be.
Describe beta decay.In the course of a radioactive decay process called beta decay, an atomic nucleus emits a beta ray. During beta decay, the proton in the nucleus transforms from a proton to a neutron, and vice versa. + decay refers to the conversion of a proton into a neutron. Similar to this, the conversion of a neutron into a proton is known as decay.
It is clear that the negative beta decay is exothermic. However, a proton becomes a neutron in positive beta decay. Due to the discrepancies in the rest masses (1.3 MeV; see Table 2.1), this requires energy, which is supplied by the nucleus' mass reduction.
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Water is leaking from the bottom of a conical cup that is 20 inches across and 20 inches deep. Given that the cup loses 0. 5 cubic inches of water per minute, at what rate is the water level changing when the water is 8 inches deep?.
A rate is what is used when two quantities are in a ratio but have different units. We can predict how one quantity will change as we adjust another using rates.
Volume of a cone = π*r^2*h/3
= π*10^2*20/3
= 2094.3951 cubic meters.
Volume of water lost when its 8 inches deep = V = π*r^2h/3
= π·10^2·12/3
= 1256.63706 cubic meters.
Remaining volume = 2094.3951 - 1256.63706
= 837.758 cubic meters.
Volume of water lost per minute = 0.5 cubic meters.
Time remaining = 837.758 * 0.5
= 7 hours approx.
Volume is a measurement of three-dimensional space that is occupied. It is frequently expressed mathematically using standard or SI-derived units. Volume and the measurement of length are connected.
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Two different samples of matter are measured in each of these glass containers. Both of the containers show the same measure for both samples of matter. The samples most likely have which of these in common?.
Two different samples of matter are measured in each of these glass containers. Both of the containers show the same measure for both samples of matter. The samples most likely to have volume in common.
How do you identify the problem?The specific inertial and gravitational mass, as well as the volume it takes up, can be used to identify matter. A substance can exist in three basic states: solid, liquid, and gas.
What is volume, exactly?Volume is a three-dimensional measurement that's used to gauge a solid shape's capacity. It implies that a closed form's volume determines how much space it can occupy in three dimensions.
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Answer:
The correct answer is volume
Hope it helps
Explanation:
What is the primary basis on which we divide the ingredients of the solar nebula into the four categories hydrogen/helium, hydrogen compounds, rock, and metal?.
Answer:
Composition. The ingredients of the solar nebula fell into 4 categories based on their condensation temperatures: metals, rocks, hydrogen compounds (water, methane, ammonia), and light gasses (hydrogen and helium).
Explanation:
spectroscopy unknown. the spectra and data provided were obtained from a pure organic molecule. for 1h nmr spectra, the integral is given in number of hydrogens (
The given data is of NMR spectroscopy and the only molecule identified from it is 2,2-dimethyl-1-phenylbutan-1-one.
NMR spectroscopy is an essential technique that uses radio frequency pulses to measure an atomic nucleus' resonant frequency in relation to its chemical or environmental surroundings (for example, the most prevalent stable isotopes 1H, 13C, and 15N).
2,2-dimethyl-1-phenylbutan-1-one (C12H16O, Mol. wt. 176 g/mol) is the only pure organic molecule identified by the data provided (Mass, IR, 1H NMR, and 13C NMR).
Two orthoprotons "a" in 1H NMR spectroscopy produce a signal at 7.8 ppm as a result of interaction with neighboring protons. At 7.5 ppm, a multiplet of one para proton (B) and two meta protons (C) is seen. Methylene protons 'd' pair with nearby three protons to form a quartet of two protons at 1.4 ppm. Singlet at 1.3 ppm is produced by six equivalent protons (proton "e") of methyl groups. Due to interaction with two methylene protons, three protons "f" appear as a triplet at 0.9 ppm.
Carbonyl carbon (C1) appears in 13C NMR spectroscopy at 211 ppm. At 138 ppm, ipso carbon (C2) signals. The other four aromatic carbons provide a stronger signal at 128 ppm and the para carbon (C3) to emerge at 133 ppm (C4). The signal levels for carbons C5, C6, C7, and C8 are 48, 33, 23, and 7 ppm, respectively.
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What mass of Silver hydroxide (an insoluble base) is needed to neutralize 98.35 mL of 0.5417M Acetic Acid?
Glucose is processed via glycolysis, pyruvate oxidation, and the citric acid cycle. What is left of the original glucose molecule when this processing is complete?.
At the end of glucose metabolism, 2 molecules of CO2 remain from the original glucose molecule
Glucose metabolism occur in three main pathways
1. Glycolytic pathway
Glucose is broken down to produce 2 molecules of pyruvate and ATP
2. Pyruvate Oxidation pathway
Pyruvate is oxidized to produce Acetyl CoA
3. Citric Acid pathway or Kreb's cycle
Acetyl CoA is further broken down to produce 2 molecule of CO2 and 3 molecules of NADP.
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the pressure of the gas collected is equal to the ambient pressure, 744 mm hg. the experiment is run at 21 ºc, and the vapor pressure of water at this temperature is 18.65 mm hg. what is the pressure of the co2 collected in the experiment?
By using Dalton’s law of partial pressure, it is calculated that the [tex]CO_2[/tex]collected in the experiment has a pressure of 725.35 mm Hg.
A gas mixture's total pressure is equal to the total of the partial pressures of its component gases, according to Dalton's law of partial pressures.
Looking at the pressure in a closed container of gas and water is a frequent application of the Dalton's law of Partial Pressures. The pressure that the gas puts on the liquid is the system's overall pressure.
Real gases do not behave in an ideal manner; instead, they behave in an ideal manner only at low pressures and high temperatures. As a result, Dalton's law of partial pressure is only relevant at low pressures and low temperatures; it is not applicable at high pressures and low temperatures.
Given:
Pressure of mixture = 744 mm Hg
Temperature = 21℃
Pressure of Water vapour = 18.65 mm Hg
To find:
Pressure of [tex]CO_2[/tex] = ?
Formula:
Pressure of mixture = Pressure of [tex]CO_2[/tex] + Pressure of water vapour
Pressure of [tex]CO_2[/tex] = 744 - 18.65
P of [tex]CO_2[/tex] = 725.35 mm Hg
Result:
The pressure of [tex]CO_2[/tex] collected in the experiment is 725.35 mm Hg, according to Dalton’s law of partial pressure.
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A rocket launcher makes an angle of 53.1 degrees from the ground. It launches a rocket with an initial speed of 20.8 m/s.
How high is it from the ground, in meters, after 1.43 seconds???
why do simple molecular substances smell
Simple molecular substance presumably small substances smell as the particle the release in the air, the odor they produce. The more volatile substance release particles off more easily hence stronger it smells.
The smells travels through the medium of air by the concept of diffusion. Diffusion is a method where air particle travels freely in all directions and eventually spread through air around them. The particles in diffusion move from higher concentration to lower concentration.
Different molecules have different smell as their molecular vibrations give them the distinct smell. Odorant compounds is not limited to carbon containing compounds, both organic and inorganic have odor e.g. [tex]NH_{3}[/tex].
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How do I solve for 5?
• The depression in freezing point is given by ΔTF = KF · b · i,
where i depend upon the number of ions produced by the solute in a solution.
• The higher the value of i obtained, the higher the depression freezing point .
,• CaCl2 (aq) → Ca2+ (aq) + 2Cl– (aq).....(3 ions)
,• and NaCl Na+ and Cl– ions →...............(2 ions )
,• Sugar/sucrose doesnt dissociate
,• Thus CaCl2 will have similar freezing point as water . Option B
,•
one mole of the carbon-12 isotope contains 6.022 × 1023 atoms. what volume in m3 would be needed to store one mole of cube-shaped children's blocks 2.00 cm long on each side?
The volume in m³ needed to store one mole of cube-shaped children's blocks 2.00 cm long on each side is 4.816 * 10¹⁸ m³
What is the volume of one mole of cube-shaped children's blocks 2.00 cm long on each side?The volume of one mole of cube-shaped children's blocks 2.00 cm long on each side is calculated as follows:
The volume, V, of a cube is calculated using the formula: V = s³
where s is the length of one side of the cube.
Length of a side of the cube-shaped children's blocks = 2.0 cm or 0.02 m
The volume of the cube-shaped children's blocks = 0.02 m * 0.02 m * 0.02 m
The volume of the cube-shaped children's blocks = 8 * 10⁻⁶ m³
Volume of one mole of the cube-shaped children's blocks = 6.022 × 102²³ × 8 * 10⁻⁶ m³
Volume of one mole of the cube-shaped children's blocks = 4.816 * 10¹⁸ m³
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The wide variety of species on Earth, whether they are plants, animals or microscopic organisms, are vital to keep the world's many ecosystems healthy, balanced, and thriving. Which of these environmental impacts is MOST likely to have a positive impact on biodiversity?
Answer:
Plants provide us with food, medicine, wood, fuel, and fiber. In addition, they provide shelter for a multitude of other living beings, produce the oxygen we breathe, maintain the soil, regulate humidity and contribute to climate stability.
At a certain university there are five men’s residence halls. Dorm d1 needs 10 more persons to reach capacity, d2 needs five more, and d3 needs 15 more. No students have been assigned to d4 and d5, each of which can house 100 students. If it is desired to fill up d1, d2, and d3, in how many ways can 100 new male students be assigned to these five halls?.
1.615304584 ×10⁵⁸ ways can 100 new male students be assigned to these five halls.
How can probability be explained?A probability is a number that expresses the possibility or likelihood that a specific event will take place. Probabilities can be stated as proportions with a range of 0 to 1, or as percentages with a range of 0% to 100%.
Ways of selecting 10 students out of 100 = C(100,10) for D1.
After that 100-10 = 90 students are remaining.
Ways of selecting 5 students out of 90 is C(90,5) for D2.
Ways of selecting 15 students out of 90-5 = 85 is C(85,15) for D3.
Now number of remaining students is 85 -15 = 70.
Now for each of these 70 students we have 2 choices D4 and D5.
So these 70 students can be distributed in 2^70 ways.
So number of ways 100 new male students can be assigned to these five halls is
[tex]\begin{aligned}&=C(100,10) \cdot C(90,5) \cdot C(85,15) \cdot 2^{70} \\&=1.73 * 10^{13} * 43949268 * 1.798 * 10^{16} * 1.1806 * 10^{21} \\&=\mathbf{1 . 6 1 5 3 0 4 5 8 4} * \mathbf{1 0}^{58}\end{aligned}[/tex]
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Complete the chart for the following isotopes of the element Iodine
1. The characteristics of an acid are that it has a _____________ taste, reacts with _____________, and turns litmus paper into ______________.
2. When you add TOO MUCH solute to a solution, the solution becomes ____________________.
3. A mixture contains a ___________________ and a ___________________.
4. You test a liquid and its pH is 7. This liquid is _____________________.
5. Lemon juice, apple juice, and vinegar all have pH measurements below seven (7), making them a (n) __________.
6. Ammonia, blood, and drain cleaner all have pH measurements above seven (7), making them a (n) ________________.
7. ___________________ is another word for eating away at material.
8. __________ can be an acid or base because it is a good conductor of electricity.
9. __________ is a positive ion and __________ is a negative ion.
10. Two or more substances mixed but not chemically combined are a _____________.
Answer:
Explanation:
1. The characteristics of an acid are that it has a sour taste, reacts with metals, and turns blue litmus paper into red.
2. When you add TOO MUCH solute to a solution, the solution becomes saturated at some point. It will not dissolve anymore and will remain solid instead.
3. A mixture contains an acid and a base.
4. You test a liquid, and its pH is 7. This liquid is Neutral.
5. Lemon juice, apple juice, and Vinegar all have pH measurements below seven (7), making them acidic.
6. Ammonia, blood, and drain cleaner all have pH measurements above seven (7), making them basic.
7. Erosion is another word for eating away at material.
8. Vinegar can be an acid or base because it is a good conductor of electricity.
9. Cation is a positive ion and Anion is a negative ion.
10. Two or more substances mixed but not chemically combines are a Mixture.
researchers obtained the following data from experiments to find the molecular formula of benzocaine, a local anesthetic, which contains only carbon, hydrogen, nitrogen, and oxygen. complete combustion of a 3.54-g sample of benzocaine with excess forms 8.49 g of
An ester local anesthetic known as benzocaine is frequently used as a topical pain treatment or as cough drops. It is marketed under the trade names Orajel and others. Many over-the-counter anesthetic ointments, including those for oral ulcers, contain it as the active ingredient.
8.49 g of CO2 and 2.14 g of H2O are produced upon complete burning of a 3.54 g sample of benzocaine with extra oxygen. We discover that a different sample weighing 2.35 g has 0.199 g of Nitrogen in it.
It is discovered that benzocaine has a molar mass of 165 g>mol.
A fuel and an oxidant, typically atmospheric oxygen, engage in a high-temperature exothermic redox chemical reaction known as combustion, or burning, which results in the production of oxidized, frequently gaseous products in a mixture known as smoke.
Benzocaine topical overdoses may result in potentially fatal side effects such irregular heartbeats, convulsions, unconsciousness, delayed breathing, or respiratory failure (breathing stops).
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Practice 3: What is the mass of the liquid?
What is the volume of the liquid?
What is the density of the liquid?
Mass of the liquid is the amount of the liquid counted up or measured in grams to calculate its actual mass.
What is mass, volume and density?Amount of liquid in the container or a vessel is always need to measured in volume , in litres to predict the capacity of container.Volume of the liquid is exactly what i said the litre or mL of water or liquid which is in the container, for example you have one litre water in 2 L of water bottle.Density is defined as mass per unit volume, that is to calculate the density we divide mass by volume.Density of pure water is taken to be one.To know more about density visit:
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