Answer: because it consists of more than one element, which are hydrogen and oxygen in a covalent bond.
Answer:
Fusão: a substância volta do sólido para o líquido. Condensação: a substância muda de um gás para um líquido. Vaporização: a substância muda de líquido para gás. Sublimação: a substância muda diretamente de um sólido para um gás sem passar pela fase líquida.
Answer:
A non example of a galaxy is a star
Answer:
0.75L
Explanation:
To get the number of liters of hydrogen gas produced, it is very essential to get the number of moles of hydrogen gas produced.
The number of moles of hydrogen gas produced is obtainable and accessible from
the number of moles of zinc reacted.
Hence, we will get the number of moles of zinc reacted at first. To get the number of moles of zinc reacted, we divide the mass of the zinc by the atomic mass of the zinc metal which is 65.38 amu
The number of moles of the zinc is thus: 2.2/65.38 which equals 0.03365 mole
From the equation of chemical reaction, it can be seen that one mole of zinc metal yielded one mole of hydrogen gas. Hence, it is expected that 0.03365mole of zinc will yield 0.03365mole of hydrogen gas.
Now, we proceed to get the volume of the hydrogen gas produced. We know quite well that at S.T.P a mole of a gas occupies a volume of 22.4L. Hence , 0.03365 mole will occupy a volume of 22.4 * 0.03365 which equals 0.75L
