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Dvinal [7]
4 years ago
8

What is the density, in g/mL, of a cube of lead (Pb) that weighs 0.371 kg and has a volume of 2.00 in.3

Chemistry
1 answer:
myrzilka [38]4 years ago
7 0

Answer:

11.32 g/mL

Explanation:

Given that:-

Mass = 0.371 kg = 371 g ( 1 kg = 1000 g)

Volume = 2.00 in³

The conversion of in³ to mL is as shown below:-

1 in³ = 16.3871 mL

So, Volume = 2.00\times 16.3871\ mL = 32.7741 mL

The expression for the calculation of density is shown below as:-

\rho=\frac{m}{V}

Applying the values as:-

\rho=\frac{371\ g}{32.7741\ mL}=11.32\ g/mL

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6 0
2 years ago
What is the mass of 8.12 × 10^23 molecules of CO2 gas? (Atomic mass of carbon = 12.011 u; oxygen = 15.999 u.)
amid [387]

Answer:

m=59.3gCO_2

Explanation:

Hello,

In this case, the first step is to compute the molar mass of carbon dioxide as shown below, considering it has one carbon atom and two oxygen atoms:

M=12.011g/mol+2*15.999g/mol\\\\M=44.009g/mol

It is important to notice it is the mass in one mole of such compound. Afterwards, we need to use the Avogadro's number to compute the how many moles are in the given molecules of carbon dioxide as shown below:

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4 0
3 years ago
A.explain what is meant by term
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Answer:

Explanation:

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Protons are positively charged particles in an atom.

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Properties of elements can be predicted using these patterns even before they are discovered.

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Chemical property of these elements: they are chemically unreactive.

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C.

Noble Gases/ Inert Gases/ Group O elements

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