The answer is C. It bans the exploitation of mineral resources
Answer: 
Explanation:
Significant figures : The figures in a number which express the value or the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
Rules for significant figures:
Digits from 1 to 9 are always significant and have infinite number of significant figures.
All non-zero numbers are always significant.
All zero’s between integers are always significant.
All zero’s after the decimal point are always significant.
All zero’s preceding the first integers are never significant.
Thus
has three significant figures
0.216g of aluminium compound X react with an excess of water water to produce gas. this gas burn completely in O2 to form H2O and 108cm^3of CO2 only . the volume of CO2 was measured at room temperature and pressure
0.108 / n = 24 / 1
n = 0.0045 mole ( CO2 >>0.0045 mole
0.216 - 0.0045 = 0.2115
so Al = 0.2115 / 27 => 0.0078 mole
C = 0.0045 * 1000 => 4.5 and Al = 0.0078 * 1000 = 7.8
While I am not the brainliest I can certainly answer.
This was a chemical change because the chemical components were changed, a big giveaway to this was the fizzing, however the temperature rising was also another giveaway.
<u>Answer:</u>
<u>For 1:</u> The mass of
in the original mixture is 10.46 g
<u>For 2:</u> The mass of
in the original mixture is 21.11 g
<u>Explanation:</u>
We are given:
Mass of water = 1.90 g
Mass of carbon dioxide = 13.64 g
Mass of oxygen = 4.10 g
The given chemical reaction for decomposition of
follows:

By Stoichiometry of the reaction:
of oxygen is produced when
of potassium chlorate is decomposed.
So, 4.10 g of oxygen will be produced when =
of potassium chlorate is decomposed.
Amount of
in the mixture = 10.46 g
The given chemical reaction for decomposition of
follows:

By Stoichiometry of the reaction:
18 g of water is produced when
of potassium bicarbonate is decomposed.
So, 1.90 g of water will be produced when =
of potassium bicarbonate is decomposed.
Amount of
in the mixture = 21.11 g