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Archy [21]
3 years ago
13

Mantle material rises in convection currents because heated materials becomes more dense

Chemistry
1 answer:
sergey [27]3 years ago
3 0
Heated mater rises and cold mater sinks
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Calculate the moles and grams of solute in each solution. D. 2.0 L of 0.30M Na2SO4. I already have A, B, and C. Thanks!
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Find the number of moles
C = n / V
C(Concentration) = 0.30 moles / L
V ( Volume) = 2 L
n = ??
n = C * V
n = 0.30 mol / L * 2 L
n = 0.60 mol


Find the molar mass
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1S   = 32 * 1 = 32 grams
O4   = 16 * 4 = 64 grams
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Find the mass
n = given mass / molar mass
n = 0.06 mol
molar Mass = 142 grams / mol
given mass = ???

given mass = molar mass * mols
given mass = 142 * 0.6
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85.2 are in a 2 L solution that has a concentration of 0.6 mol/L


4 0
2 years ago
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Which of the following statements correctly describes what happens in all chemical reactions?
azamat

Answer:

Bonds between atoms are broken/ or new bonds are formed

Explanation:

Due to chemical changes.

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