A chemist determines by measurements that 0.030 moles of hydrogen gas participate in a chemical reaction. Calculate the mass of hydrogen gas that participates. Be sure your answer has the correct number of significant digits.

0.060 g

Explanation:

Hydrogen gas is made up of 2 atoms of hydrogen .

From the formula for calculating mole:

mole = mass/molar mass

Molar mass of hydrogen gas = 2.016 g/mol

Hence, 0.030 mole hydrogen gas would weigh:

mass = molar mass x mole

              =  2.016 x 0.030

                = 0.06048 g

The mass of hydrogen gas that participated to the correct number of significant digits is, therefore, 0.060 g

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).