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Mamont248 [21]
3 years ago
14

PLEASE HELP PLEASE!!ASAP!

Chemistry
1 answer:
MariettaO [177]3 years ago
7 0

Answer:

The mass of oxygen will be 19.53g

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Molar mass of Ca = 40 g / mol , given 123 g Ca is 123/40= 3.075 moles,

1 mole = 6.022 * 10^23 atoms, so 3.075 moles Ca= 18.51*10^23 atoms

Explanation:

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Identify the reactants in the following equation.
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33. Hydrocarbons that release pleasant odors are called_________<br> hydrocarbons. (1 point)
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Aromatic Hydrocarbons

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Using the table below, identify the unknown material that has a mass of 15,06 g and a
kati45 [8]

The unknown material : gold

<h3>Further explanation  </h3>

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

mass of unknown the material : 15.06 g

volume = 0.78 ml

The density :

\tt \rho=\dfrac{m}{V}\\\\\rho=\dfrac{15.06}{0.78}=19.31~g/ml

materials that match the density: gold

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3 years ago
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