9. How would the following changes affect the appearance of the hydrogen spectrum: a. The amount of hydrogen gas is reduced by a factor of 2 b. The hydrogen gas contained some impurities c. The voltage was too low to cause the reaction H2(g) 2H(g).
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Ответ:
1 gram.
Explanation:
Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth's density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units).