Explanation:
2H2 + O2 = 2H2O
2mol. 1mol. 2mol
2mol reacts with 1mol
13mol reacts with x
x=<u>13mol</u><u> </u><u>×</u><u> </u><u>1mol</u>
<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u>2mol</u>
x= <u>13mol</u>
<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u>2mol
x= 6.5mol of oxygen
Answer:
It is termed a buffering agent
Explanation:
A buffering agent consist of a weak acid and a base that is used to maintain the acidity of a solution after the addition of
another acid or base
A buffer is used to prevent any rapid change in ph
Calcium has a 2+ charge and Oxygen has a 2- charge.
To get the formula you have to balance the charges so that it's neutral. In this case a 2- and 2+ charge cancel each other out making the formula CaO.
Answer:
The the empirical formula for magnesium chloride based on this experiment will be 
Explanation:
Given that,
Mass of Mg = 0.50 g
Mass of magnesium chloride found = 1.99 g
Let the formula of magnesium chloride be 
We know that,
Molar mass of Mg= 24 g/mol
Molar mass of magnesium chloride = (24x+35.5y) g/mol
We need to calculate the moles of Mg
Using formula of moles

Put the value into the formula


We need to calculate the mole of magnesium chloride
Using formula of moles

Put the value into the formula

The reaction will be,

We need to calculate the value of x and y
Using number of moles of Mg in reactant and product
Moles of Mg atom in reactant=Moles of Mg atom in product







Hence, The the empirical formula for magnesium chloride based on this experiment will be 