Respuesta :
Answer: B) 46.7% Si and 53.3% O
Explanation:
To calculate the mass percent of element in a given compound, we use the formula:
[tex]\text{Mass percent of element}=\frac{\text{Mass of element}}{\text{total mass}}\times 100\%[/tex]
Mass of quartz [tex](SiO_2)[/tex] = 5.05 g
Mass of silicon = 2.36 g
Mass of oxygen = Mass of quartz [tex](SiO_2)[/tex] - mass of silicon = 5.05g - 2.36 g = 2.69 g
[tex]\text{Mass percent of silicon}=\frac{\text{Mass of silicon}}{\text{total mass of quartz}}\times 100=\frac{2.36}{5.05}\times 100=46.7\%[/tex]
[tex]\text{Mass percent of oxygen}=\frac{\text{Mass of oxygen}}{\text{total mass of quartz}}\times 100=\frac{2.69}{5.05}\times 100=53.3\%[/tex]
Thus the percentages of silicon and oxygen in quartz are B) 46.7% Si and 53.3% O
The mass percent of silicon in quartz has been 46.7%, and the mass percent of oxygen has been 53.3%. Thus, option B is correct.
Mass percent can be described as the percent composition of an element in a chemical compound. Percent of element can be given as:
Percent mass = [tex]\rm \dfrac{Mass\;of\;element}{Mass\;of\;sample}\;\times\;100[/tex]
The mass of silicon in the sample has been = 2.36 grams
The total mass of sample = 5.05 grams.
The percent mass of silicon can be given as:
Percent mass of silicon = [tex]\rm \dfrac{2.36}{5.05}\;\times\;100[/tex]
Percent mass of silicon = 46.7%
The compound has been composed of silicon and oxygen. Thus, the mass percent of quartz can be given as:
100% Quartz = %Silicon + % Oxygen
100% Quartz = 46.7% + % Oxygen
The mass % of oxygen = 100 - 46.7%
The mass % of oxygen = 53.3%
The mass percent of silicon in quartz has been 46.7%, and the mass percent of oxygen has been 53.3%. Thus, option B is correct.
For more information about the mass percent, refer to the link:
https://brainly.com/question/5394922
