Answers
Answer:
c
Explanation:
Related Questions
At which location are metamorphic rocks most likely to
form?
оооо
D
С
В
A
Done
Intro
HELP PLEASE
Answers
Answer:
D
Explanation:
Answer:
c
Explanation:
Using your knowledge of symbols, determine which compound listed must contain both copper and oxygen.
1. malachite, Cu 2CO 3(OH) 2
2. calcite, CaCO 3
3. glucose, C 6H 12O 6
4. chalcopyrite, CuFeS 2
Answers
Answer:
Malachite
Explanation:
Malachite is the only listed compound that must contain copper and oxygen.
Copper and oxygen are both elements found on the periodic table. They have the following symbols;
Copper = Cu
Oxygen = O
From the given choices, only option 1 has the symbol Cu and O.
So only malachite contains both copper and oxygen.
When 38.1 grams of a certain metal at a temperature of 90.0°C is added to 100.0mL of water at a temperature of 17.6°C in a perfectly insulated calorimeter, the final temperature of the resulting mixture is 19.1°C. a. Find the value of q for the metal b. Find the value of q for the water c. What is the specific heat of the metal?
Answers
Answer:
a. qm = 627.3 J
b. qw = 627.3 J
c. C₂ = 227.4 J/kg.°C
Explanation:
a.
Since, the calorimeter is completely insulated. Therefore,
Heat Lost by Metal = Heat Gained by water
qm = qw
qm = m₁C₁ΔT₁
where,
qm = heat lost by metal = ?
m₁ = mass of water = (density)(volume) = (1000 kg/m³)(100 mL)(10⁻⁶ m³/1 mL)
m₁ = 0.1 kg
C₁ = specific heat capacity of water = 4182 J/kg.°C
ΔT₁ = Change in Temperature of Water = 19.1°C - 17.6°C = 1.5°C
Therefore,
qm = (0.1 kg)(4182 J/kg.°C)(1.5°C)
qm = 627.3 J
b.
Since,
qm = qw
qw = 627.3 J
c.
qm = m₂C₂ΔT₂
where,
m₂ = mass of metal = 38.1 g = 0.0381 kg
C₂ = specific heat capacity of metal = ?
ΔT₂ = Change in Temperature of metal = 90°C - 17.6°C = 72.4°C
Therefore,
627.3 J = (0.0381 kg)(C₂)(72.4°C)
(627.3 J)/(0.0381 kg)(72.4°C) = C₂
C₂ = 227.4 J/kg.°C
Chlorine has a total of 17 electrons and 7 Valence electrons. Why are these two numbers
different?
Answers
Chlorine contains a total of 17 electrons which are filled in different orbitals of which 7 electrons are located in the outermost energy level or orbital.
What are valence electron?In an atom, the electrons are surrounding the nucleus through fixed paths or energy levels called orbitals. Electrons are filled in the increasing order of energy level. Thus lower energy levels are filled first.
The last electrons are filled in the outermost energy levels and are called valence electrons. Each shell have a definite capacity for electrons.
Cl is 17the element in periodic table and has 17 electrons of which 7 electrons are located in the outermost shell. Hence, option A is correct.
To learn more about chlorine, find the link below:
https://brainly.com/question/14962130
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what type of mixture is table salt
Answers
Answer:
The chemical mixture of table salt is NaCl.
What causes the greenhouse effect?
Answers
Answer:
hope it helps...
Explanation:
The greenhouse effect is caused by the atmospheric accumulation of gases such as carbon dioxide and methane, which contain some of the heat emitted from Earth's surface. The atmosphere allows most of the visible light from the Sun to pass through and reach Earth's surface.
Greenhouse effect is caused by the presence of greenhouse gases in the atmosphere and the trapping of energy within the lower atmosphere.
Greenhouse gases can be defined as the gases that trap heat within the Earth's atmosphere. Some examples of greenhouse gases present in the atmosphere are:
Carbon dioxideMethaneWater vaporOn a related note, greenhouse effect refers a terminology that is used to describe the role that greenhouse gases play in keeping the temperature of planet Earth warm.
In conclusion, greenhouse effect is typically caused by the presence of greenhouse gases in the atmosphere and the trapping of energy within the lower atmosphere.
Find more information: https://brainly.com/question/1577730
which molecules are used to produce energy
Answers
Answer:
Explanation:
fats, proteins, and carbohydrates
formula for salt
I will mark u brain list
Answers
Answer:
The formula for salt is NaCl or Sodium chloride
Does recycling plastic solve the issue of using crude oil?
Answers
Answer:
Every single tonne of recycled plastic cuts carbon emissions by 1.6t and preserves 2t of crude oil. And each tonne that is recycled is not just one tonne less which the industry has to buy as crude oil on the global market – it is also one tonne less of waste plastic in our seas and oceans.
4. What happens when a bond is formed between a greenish yellow gaseous element X and a
soft metallic element Y.
A Atom X gains an electron.
B Atom X loses an electron.
С Atom Y gains an electron.
D X and Y share a pair of electrons
Answers
Answer:
A. Atom x gains an electron
Explanation:
What happens when a bond is formed between a green gaseous element and a soft metallic element?（2.0分）
A. The gas atoms gain an electron.
B. The gas atoms lose an electron.
C. The metal atoms gain an electron.
D. The two elements share a pair of electrons
Atom X gains an electron because it needs electron to become stable.
Atom Y loses electron and atom X gains an electron in order to complete its outermost shell. Atom Y belongs to metal which has one electron while on the other hand, atom Y belongs to halogens which needs one electron for the completion of its outermost shell and become stable so atom Y loses one electron and atom X gains that electron and attain the electronic configuration of noble gases so we can say that Atom X gains an electron.
Learn more: https://brainly.com/question/19509418
The____of an earthquake is the location where the rupture of an
earthquake begins and energy is released.
(I’m really slow I need help) for science
Answers
Answer:
try hypocenter for the blank spot... hope this helps
Explanation:
what element is
Column 16, period 3
Answers
Answer:
The element is Sulfur.
Explanation:
What type of solid is formed when a bond occurs between magnesium and oxygen?
1) Metallic
2) Molecular
3) Ionic
4) Network
Answers
Answer:
3) Ionic
Explanation:
The solid formed when a bond occurs between magnesium and oxygen is an ionic bond. This bond type occurs between a metal and non-metal.
Magnesium is the metalOxygen is the non - metalDue to the large electronegativity difference between the two species, the metal loses electrons which the non-metal oxygen gains They both complete their octet and electrostatic attraction leads to the formation of ionic bonds.Help me plzz I don’t get this question
Answers
Answer: this ones old do you still need help on this one?
Explanation:
What is the frequency of a photon whose energy is 5.4 ´ 10-19 J? (h = 6.626 ´ 10-34 J·s)
Answers
Answer:
8.15 x 10¹⁴Hz
Explanation:
Given parameters:
Energy of photon = 5.4 x 10⁻¹⁹J
h = 6.626 x 10⁻³⁴J.s
Unknown:
Frequency of the photon = ?
Solution:
The energy of a photon is given as;
E = hf
h is the Planck's constant
f is the frequency
f = [tex]\frac{E}{h}[/tex] = [tex]\frac{5.4 x 10^{-19} }{6.626 x 10^{-34} }[/tex] = 8.15 x 10¹⁴Hz
Examine the diagram of a cell.
Which organelle is marked with an X?
lysosome
nucleus
chloroplast
vacuole
Answers
Answer:
chloroplast
Explanation:
i took the test
Help please I'll give u brainliest
What is the balanced equation that represents this reaction. sulphur trioxide reacts with water vapour in the atmosphere to form sulphuric acid (h2so4).
Answers
so3 +h2o =h2so4
i just searched up google i have no explanation
Ight I just here’s my first one
Answers
Answer:
D
Explanation:
ILL GIVE BRAINLIST Mrs. Kucalaba downloaded some science music from the Internet onto her iPhone. She listened to the science music while she was building a deck in her mom’s yard.
Which energy transformation explains how Mrs. Kucalaba was able to listen to music on her iPhone while building a deck in her mom’s yard?
Question 19 options:
Light energy was transformed to chemical energy
Chemical energy was transformed to sound energy
Sound energy was transformed to chemical energy
Chemical energy was transformed to heat energy
Answers
The average monthly temperatures for January, April, July, and October in Baltimore, Maryland are graphed below. These averages were calculated from 30 years of data.
Nina predicts that the average temperature in Baltimore will be 68°F next April. Why is her prediction probably wrong?
A.
because the average July temperature is greater than 75°F
B.
because 68°F is much lower than the average April temperature
C.
because 53°F is much lower than the average April temperature
D.
because 68°F is much higher than the average April temperature
Answers
Answer:the answer is d
Explanation:because the graph shows that that the average temperature is 53 so it only makes sense that the answer is (D)
Please answer quick. In an experiment, a student collects 107 mL of H2 over water at a pressure of 104.8 kPa and a temperature of 30°C. How many grams of H2 are present?
A.
0.024 g
B.
4.00 g
C.
0.04 g
D.
0 049 g
And explain
Answers
Answer:
Mass = 0.008 g
Explanation:
Given data:
Volume of H₂ = 107 mL
Pressure = 104.8 KPa
Temperature = 30°C
Mass of H₂ present = ?
Solution:
Formula:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the units of temperature, pressure and volume.
Temperature = 30+273 = 303 K
Volume of H₂ = 107 mL (107/1000= 0.107 L)
Pressure = 104.8 KPa (104.8/101 = 1.04 atm)
by putting values,
1.04 atm ×0.107 L = n× 0.0821 atm.L/ mol.K × 303 K
0.11 atm.L = n×24.87 atm.L/ mol
n = 0.11 atm.L / 24.87 atm.L/ mol
n = 0.004
Mass of H₂:
Mass = number of moles × molar mass
Mass = 0.004 mol × 2 g/mol
Mass = 0.008 g
PLS HURRYY ILL NAME YOU BRAINLIESTTT
explain the difference between a compound and a mixture
Answers
Answer:Compound: A substance that is made up of more than one type of atom bonded together. Mixture: A combination of two or more elements or compounds that have not reacted to bond together; each part in the mixture retains its own properties. Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances. Compounds can be of three types, which are: covalent compounds, metallic compounds and ionic compounds.
If an atom gains one electron, what charge will it have?
Answers
Answer:
It becomes negatively charged
Proton is positive, electron is negative and neutron is neutral
Explanation:
Answer:
If an atom gains one electron, it will have a negative one charge, or -1.
Electrons = Negative
Protons = Positive
what color does red represent in the periodic table
Answers
Answer:
Gas
Explanation:
Legend primordial element element by radioactive decay Atomic number color: red=gas
How do the scientist know that cells exist
Answers
Shabnam put something in a vessel of water and heated it on a gas stove for 30 minutes. That thing looked the SAME even after 30 minutes of heating. What could she have put into the vessel? A) a steel spoon B) a wax candle C) a handful of sugar D) a piece of chocolate
Answers
Answer: She could have put a steel spoon into the vessel. The correct option is A.
Explanation:
When a candle wax is passed through heat, it is capable of melting within 10- 15 minutes of boiling. Therefore it is not capable of looking the same after 30 mins of heating.
When sugar is put into water it dissolves. When heated it has the ability to crystallize out after water is evaporated but doesn't retain its shape.
A piece of chocolate will melt the instance it comes in contact with any form of heat.
A steel spoon is an alloy metal which is not capable of melting by boiling in water for just 30 minutes. A steel is an alloy of Iron and carbon which melts when superheated at the temperature of 1510 degrees.
How many neutrons does Ruthenium have?
Answers
Answer: 57 neutrons
Explanation: Ruthenium has an atomic number of 44, meaning it has 44 electrons, 44 protons, and 57 neutrons.
Answer:
57 neutrons
Explanation:
Ruthenium has atomic number of 44, that is, it contains 44 electrons distributed in atomic orbitals and its nucleus has 44 protons and 57 neutrons (Figure 1). Electron distribution in atomic or molecular orbitals is called electron configuration which for Ru and the other group 8 chemical elements is shown in Table 1.
A given sample of metal has a density of 2.5 g/cm3 and a mass of 12.5 g. What is the
volume of the metal?
31.25 cm^3
5.0 cm^3
0.20 cm^3
5.0 cm
Answers
Answer:
5.0 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question we have
[tex]volume = \frac{12.5}{2.5} \\ [/tex]
We have the final answer as
5 cm³Hope this helps you
true of false. A d-orbital lies in the x, y, and z area defined by the geometric axis of space.
Answers
Answer:
true
Explanation:
What can be represented on paper or computer by using the Lewis Dot structure?
A. the electrons orbital
B. the position of an element in the periodic table
C. the valence electron shells of atoms
D. the number of total electrons
Answers
Answer:
option C is correct
Explanation: