SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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there are “2” many molecues
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there are two moles or molecues of H2; it is the coefficient
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there are “2” molecues
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None of the above
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Detailed explanation-1: -Using Coefficients Equation 2 shows that two molecules of hydrogen react with one molecule of oxygen to produce two molecules of water. The two molecules of hydrogen each contain two hydrogen atoms and so do the two molecules of water.
Detailed explanation-2: -Answer and Explanation: Hence the coefficient of hydrogen gas is 3.
Detailed explanation-3: -H2-There are 2 moles of hydrogen atoms (1 mole of elemental hydrogen). Total: 2 moles of atoms. There are 1 mole of Carbon atoms and 2 moles of oxygen atoms (oxygen is also naturally diatomic, but we’re counting atoms, not elemental configuration).
Detailed explanation-4: -Thus the molecular mass of hydrogen gas is 2×1=2g. 1 mole of hydrogen gas contains 2g hydrogen gas. Thus 2 moles of hydrogen gas have 2×2=4g of hydrogen gas. The mass of 2 moles of hydrogen gas is 4g.