Pahoehoe and Aa are two types of lava
Answer:
The answer to your question is: 2.20 x 10 ²³ molecules
Explanation:
Data
mass = 45.7 g
molecules of CF₂Cl₂ = ?
Process
1.- Calculate the mass number of CF₂Cl₂
C = 12 F =2 x 19 Cl = 2 x 35.5
total = 12 + 38 + 71
total = 121 g
2.- Use the Avogradro's number to solve the problem
121 g ------------------- 6.023 x 10²³ molecules of CF₂Cl₂
45.7 g --------------- x
x = (45.7 x 6.023 x 10²³) / 121
x = 2.75 x 10²⁵ / 121
x = 2.20 x 10 ²³ molecules
Answer:
D. Ten apples cost $9
Explanation:
C, the cost in dollars of buying apples is a function of the number (n) of apples bought
C (10) = $9 implies that the cost of buying 10 apples is $9
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Answer:
See explanation below
Explanation:
You are not putting the equation to balance. I found a question which is pretty the same as this one and put the following reaction:
H₂ + O₂ ------> H₂O
If you have a different equation please post again the question.
According to the above reaction, we can say that it's not balanced.
The reason is because in the reactants we have 2 atoms of hydrogen and oxygen, but in the products, we only have 1 atom of oxygen. so both sides do not have the same number of atoms.
To balance, we need to put a number in the product or reactant as coefficient in order to balance the whole reaction. In this case, as Oxygen is unbalanced, I will put a 2 in the products to balance the oxygen:
H₂ + O₂ ------> 2H₂O
But putting this 2 will unbalance the hydrogen in the products. We now have 4 atoms of hydrogen. What should we do now?, yes, we put a 2 in the reactants to balance the hydrogen, and then, the whole equation is balanced.
2H₂ + O₂ ------> 2H₂O
Hope this helps