Answer:
84,007 g/mol
Explanation:
Molar mass of NazCO3 which is Sodium Bicarbonate (NaHCO₃) is 84,007 g/mol
Pick 1 plz.....................
Answer:
your answer should be B ANDC
Answer:
B and c is your answer
Explanation:
HELP PLEASE ANSWER THIS QUESTION
what are 4 ways carbon effects the earth
Provide a particle-level explanation for the relationship between pressure and temperature
when the alcohol is in the gas phase.
The conservation of energy allows finding the relationship between pressure and temperature is:
Pressure is directly proportional to the temperature of the alcohol in the gaseous state.
Pressure is defined by the relationship between force and area of application.
P =[tex]\frac{F}{A}[/tex]
Where P is the pressure, F is the force and A is the area.
In the case of alcohol in the gaseous state, the mechanical energy of the molecules is only kinetic energy, it is related to temperature by the Boltzmann equation.
Em = K = [tex]\frac{3}{2}[/tex] kT
½ m v² = 3/2 k T
v² = [tex]\frac{3 k T}{m}[/tex]
Where m is the mass, v the velocity of the particles, k the Boltzmann constant and T the absolute temperature.
From this equation we see that as the temperature increases, the speed of the alcohol molecules also increases.
Using the relationship between the impulse and the change of momentum we can find the mean force.
I = F t = Δp
Where I impulse, F is the force, t is the time, Δp is the change of momentum.
if we assume elastic collisions the amount of initial and final moment are equal.
[tex]F = \frac{2p}{t} \\F = \frac{2m}{t} v[/tex]
If we assume that the molecules go at a constant speed.
v = d / t
t = d / v
Let's substitute.
[tex]F = \frac{2m}{d} v^2[/tex]
We substitute in the pressure equation.
P = 2m / Ad v²
[tex]P = \frac{6k}{ A d} \ T[/tex]
In conclusion using the conservation of energy we can find the relationship between pressure and temperature is:
Pressure is directly proportional to the temperature of the alcohol in the gaseous state.
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Which correctly explains the relationship between predators and prey?
when the number of prey increase the number of predators will increase
when the number of prey decrease, the number of predators will increase
when the number of prey increase, the number of predators will decrease
BRAINLIESTTT
Answer:
When the number of prey increase the number of predators will increase.
Explanation:
This is because the predators have more food available, which will make their population grow.
Hydrochloric acid has the
chemical formula HCI. Does this
information make you think that
hydrochloric acid is an element,
compound, or mixture
Answer:
its a mixture
Explanation:
I can't explain why
(a) Given that density is usually expressed in the units of g/cm3
, calculate the density of a cube of plastic that
has a mass of 2.331 g and an edge length of 1.500 cm (volume of a cube is V = l^3).
(explain/or do density(calculate it) find volume first. then show work of density divided by volume give proper units.) (Density is a physical property of a molecule that’s measured as mass per unit volume.) (Measurement in chemistry. Think about the density of different substances. PLEASE SHOW WORK)
Answer:
0.690g/cm^3
Explanation:
•Mass: 2.331g
•Volume: 3.375 cm^3
One side is 1.5cm.
1.5^3
3.375cm^3
•Density: Mass/Volume
Mass = 2.331g
Volume = 3.375cm^3
2.331g/3.375cm^3
0.690g/cm^3
Density: 0.690g/cm^3if you think about similarities between elements instead of differences, how can that make understanding matter a little bit easier?
how many moles of o2 are needed to react with 2.60 moles c2h2
To determine the moles of O₂ needed, we have to know in what ratio the two reactants react and then use the moles of C₂H₂ in reaction to determine the moles of O₂ needed. We can find this out based on their coefficient in a balanced equation:
Write a Balance Equation
2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O
Compare the Mole Ratio (Equation Coefficient of C₂H₂ to O₂)
Based on the equation, the mole ratio of C₂H₂ to O₂ is 2 to 5. Therefore for every molecule of C₂H₂, ⁵/₂ C₂H₂ molecules are needed to react.
Find the moles of O₂
Since the number of moles of C₂H₂ = 2.60 moles
then moles of O₂ = 2.60 moles × ⁵/₂
= 6.5 moles∴ 6.5 moles of O₂ is needed to completely react with 2.60 moles of C₂H₂.The metal thallium occurs naturally as 30% thallium -203 and 70% thallium-205 calculate the atomic mass of thallium
Answer:
204.4 amu.
Explanation:
30% of thallium will be multiplied by the mass number of thallium-203(203). 70% thallium will be multiplied by the mass number of thallium-205(205).
Then you will add them up.
So, (0.30x203) + (0.70x205) = 204.4 amu.
The metal thallium have two isotopes with different masses. The average atomic mass of thallium is 204.4.
What is isotopes?Isotopes are atoms with same atomic number and different mass number. For example hydrogen have three isotopes namely proton, deuteron and triton with masses 1, 2 and 3 au respectively.
The average atomic mass of an atom can be calculated from the percentage abundance and masses of its isotopes as given below:
atomic mass = ∑ (% abundance/100) mass
The mass of metal thallium is calculated as follows:
Atomic mass of thallium = [tex][\frac{30}{100}\times 203] + [\frac{70}{100}\times 205]= 204.4[/tex]
Hence, the average atomic mass of thallium is 204.4 au.
To learn more about isotopes, refer the link below:
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Name the form of carbon used for absorbing poisonous gases and purification of noble gases
How could understanding the unified structure of atoms help you better understand an element that was unfamiliar to you?
Answer:
Well,You have to understand pretty much everything, If you know the number of protons or electron then you will know its atomic number,and if you know the number of protons and neutrons then you will know the mass of the element. so, once you grasp these concepts, you can better understand new elements.Explanation:
What is the correct ratio of coefficients to balance this chemical equation? 8 1:12 01:2:13 O 1-2-3 thing 0 2:43
Answer:
2:4:3
Explanation:
The coefficient to balance this chemical equation is 2:4:3
Answer: very important
Explanation: where did u get this worksheet from
A popular radio station broadcasts with a frequency of 92.7 MHz. What is the wavelength of the broadcast?
True or False. Weather describes the atmospheric events that occur each day & climate is the average weather pattern in an area over many years.
Answer:
true
Explanation:
Answer:
» TrueExplanation:
Weather refers to short-term changes in the atmosphere of each day ,
Climate describes what the weather is like over a long period of time in a specific area. Different regions can have different climates
Warm fronts are shown on weather maps as a line with blue triangles. *
A. True
B. False
Answer:
False
Explanation:
Refer to the picture for better understanding
Hope this helps :)
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And have an amazing day <3
25. In the formula for a molecular compound, which atom generally comes first? You may went
to refer to a periodic table.
Answer:
For organic compounds, carbon and hydrogen are listed as the first elements in the molecular formula, and they are followed by the remaining elements in alphabetical order. For example, for butane, the molecular formula is C 4 H 10.
Explanation:
What do polar compounds and ionic compounds have in common?
Answer:
In what way is a polar-covalent bond similar to an ionic bond? There is a difference between the electronegativities of the two atoms in both types of bonds that results in electrons being more closely associated with the more electronegative atom.
Explanation:
haz un mapa conceptual y explique con imagenes las formas , estructuras y tipos de celulas vegetales que existen en la naturaleza.
Necesito ayuda es para hoy.
Answer:
Si
Explanation:
Why can't molecules have thermal energy?
Answer:
Thermal Energy, also known as random or internal Kinetic Energy, due to the random motion of molecules in a system. Kinetic Energy is seen in three forms: vibrational, rotational, and translational. Vibrational is the energy caused by an object or molecule moving in a vibrating motion, rotational is the energy caused by rotating motion, and translational is the energy caused by the movement of one molecule to to another location.
please help! qqqqqqqq
Answer:
sorry Hindi ko po alam ang sagot
please help! will give brainliest!!! match each of the terms on the right with the letters on the right.
used by rutherford in his experiment; made of two protons and two neutrons
for a neutralization reaction, would you expect the magnitude of q to increase, decrease, or stay the same if the concentration of only the acid were doubled? why?
For a neutralization reaction, the value of q(heat of neutralization) is doubled when the concentration of only the acid is doubled.
A neutralization reaction is a reaction in which an acid reacts with a base to yield salt and water. Ionically, a neutralization reaction goes as follows; H^+(aq) + OH^-(aq) ------> H20(l).
The heat of neutralization (Q) of the system depends on the concentration of the solutions. Since Q is dependent on concentration, if the concentration of any of the reactants is doubled, more heat is evolved hence Q is doubled.
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Answer:
Stay the same
Explanation:
If only the concentration of acid were doubled no additional neutralization reaction would occur
The prefix 'sub' means 'below'. Why are particles smaller than an atom called subatomic particles.
Answer:
Because they are smaller than an atom
Explanation:
9. An element Q with electronic configuration 2.8, 2 reacts with elements R. with electronic configuration 2, 8, 7 to form an ionic compound. The likely formula of this compound is:
Answer:
QCl2
Explanation:
Q should belong to group 2 so valency is 2
R should belong to group 17 so valency is 1
What is the mass of 15.0 moles of gold?
Answer:This Should Be the Answer :)
Explanation:
iven: Molar mass of Au = 196.96 g/mol. The Number of moles = 15.3 moles. Hence, 15.3 moles of Au contains 3.01 103 g of Au.
How many atoms are in 1.00 moles of lithium? __ atoms Li
PLEASE ANSWER:)
Answer: 6.022 × 10²³
Explanation:
Avogadro's Number (6.022 × 10²³ atoms/mole) is the number of atoms in any mole of a substance.
WILL MARK AS BRAINLIEST IF CORRECT
1) How do valence electrons impact the type of bonds an atom makes?(1 point)
a. A large number of valence electrons means the atom will share electrons; a small number of valence electrons leads to transferring from one atom to another.
b. An atom wants a full outer shell of valence electrons, so it will either transfer or share electrons depending on what the other atom needs.
c. An atom wants an empty outer shell of valence electrons, so it will either transfer or share electrons depending on what the other atom needs.
d. A small number of valence electrons means the atom will share electrons; a large number of valence electrons leads to transferring from one atom to another.
2) Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16) would be attached to one another. In carbon dioxide (CO2), how is the compound structured? (Use “–” to represent a single bond and “=” to represent a double bond.)(1 point)
a. C–O–O
b. C=O–O
c. O=C–O
d. O=C=O
3: Methane’s chemical formula is CH4. Is there a bond between any of the hydrogen atoms? Why or why not?(1 point)
a. Yes, there is because they form a long chain in order to all have stable outer energy shells.
b. No, there is not because it would form H2 instead of methane if hydrogen bonded with itself.
c. No, there is not because carbon needs four bonds, so it bonds with each hydrogen atom; hydrogen only forms one bond.
d. Yes, there is because there are one too many hydrogen atoms for carbon to handle alone, so one hydrogen must bond with another.
4: In hydrogen peroxide (H2O2), which option best shows how the atoms are ordered?(1 point)
a. O–H–O–H
b. H–O–O–H
c. O–H–H–O
d. H–O–H–O
Answer:
1. How many electrons does hydrogen need in order to have a full shell of valence electrons?...two
2. How do valence electrons impact the type of bonds an atom makes?...An atom wants a full outer shell of valence electrons, so it will either transfer or share electrons depending on what the other atom needs.
3.Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16) would be attached to one another. In carbon dioxide (CO2), how is the compound structured? (Use “–” to represent a single bond and “=” to represent a double bond.)...O=C=O
4. Methane’s chemical formula is CH4. Is there a bond between any of the hydrogen atoms? Why or why not?...No, there is not because carbon needs four bonds, so it bonds with each hydrogen atom; hydrogen only forms one bond.
5. In hydrogen peroxide (H2O2), which option best shows how the atoms are ordered?...H-O-O-H
Explanation:
Valence electrons are found on the outermost shell of an atom and determines the kind of bonds the atom can form.
When an atom has a large number of valence electrons, it is energetically more favorable for the atom to share electrons rather than to transfer electrons to another atom. Atoms with less valence electrons transfer electrons from one atom to another.
Since carbon is a member of group 14 and oxygen is a member of group 16, it follows that carbon can share four electrons with two oxygen atoms as shown in the structure O=C=O.
Carbon is always tetravalent in all its compounds. This means that one carbon atom must form four bonds. It follows that the carbon atom in CH4 forms four bonds with the four hydrogen atoms hence there are no bonds between hydrogen atoms in CH4.
H2O2 contains the peroxide (O-O) bond. It follows that its correct structure must be H–O–O–H.
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the basic principles of atomic theory were first conceived by:
The ancient atomic theory was proposed in the 5th century bc by the Greek philosophers Leucippus and Democritus and was revived in the 1st century bc by the Roman philosopher and poet Lucretius.
8. Calculate density and record it in Table 1for each of the minerals. (Make sure to use the correct significant figures)
Answer:
.....
Explanation:
BECAUSE ....