Answered

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A chemist determines by measurements That 0.0300 moles of hydrogen gas participate in a chemical reaction. Calculate the mass of hydrogen gas that participates. Be sure your answer has the correct significant digits

A Chemist Determines By Measurements That 00300 Moles Of Hydrogen Gas Participate In A Chemical Reaction Calculate The Mass Of Hydrogen Gas That Participates Be class=

Sagot :

We know that 0.0300 moles of hydrogen participate in a chemical reaction and we must calculate the mass

In order to calculate the mass we must use the next formula

[tex]\text{ mass}=\text{ molar mass}\cdot\text{ number of moles}[/tex]

In this case, the number of moles is given, 0.0300 moles and the molar mass of the hydrogen is 1.00784 g/mol

Now, we must replace the values in the formula

[tex]\text{ mass}=1.00784\frac{g}{mol}\cdot0.0300mol[/tex]

Finally, we must simplify the equation

[tex]\text{ mass}=0.0302352g[/tex]

Using the correct significant digits,

[tex]\text{ mass}=3.02\cdot10^{-2}g[/tex]

ANSWER:

[tex]3.02\cdot10^{-2}[/tex]

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