Answer:
where is the statement to answer the question
<h3>Answer:</h3>
0.5 moles
Explanation:
moles are a way to compare different elements and are used a measurement of the amount of an element or molecule
I think your teacher wants you to convert 39g of Al(OH)3 to moles
we can use a method called stoichiometry to do this.
39g Al(OH)3 x 1 mol Al(OH)3 / 78g Al(OH)3 = 0.5 moles Al(OH)3
I got 78 by adding up the molar masses for Al, 3Os and 3Hs, make sure to add for 3 Os and Hs because of the subscript 3
Answer:
B
Explanation:
The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.
The answer is cohesion because co means together and so it means to stick together
