<u>Answer:</u> Moles of iron for the given amount is 17.90 moles.
<u>Explanation:</u>
We are given 1 kg of iron and we need to find the moles of it. To calculate the moles, we use the following equation:
Mass of iron given = 1kg = 1000 grams (Conversion Factor: 1 kg = 1000g)
Molar mass of iron = 55.85g/mol
Putting values in above equation, we get:
Hence, moles of iron for the given amount is 17.90 moles.
False because photosynthesis uses light energy
<h3>
Answer:</h3>
55.81%
<h3>
Explanation:</h3>
Mass percentage composition of an element in a compound can be calculated by dividing the mass of the element in the compound by the relative formula mass of the compound and expressing it as a percentage.
Therefore;
% composition = (Mass of the element/ relative formula mass)100%
In this case;
We are given the mass of the element (oxygen) and the mass of the compound (Kaolinite) thus;
Mass % of oxygen in kaolinite = (Mass of oxygen/ mass of Kaolinite)100%
% composition of Oxygen = (8.009 g/14.35 g)100%
= 55.81 %
Therefore; the mass percent of oxygen in Kaolinite is 55.81%
What do you need help with exactly can you explain ? I think I understand what you mean cause I just had this assignment in chemistry