If two atoms** have the same number of protons, they are the same element. They have the same atomic number. The only thing that would change with the number of neutrons is the mass number.
Answer:
D
Explanation:
science shows patterns and anomalies in how the world works
Answer:
Minerals and rocks are the same. Aggregates of minerals form rocks. Minerals determine the texture of a rock. Most rocks are made of a single mineral type.
Explanation:
First we need to calculate the molar mass of
:
Na: 22.99g * 2 = 45.98g
Cr: 51.996g
O: 15.999g * 4 = 63.996g
Then add all of them together:
Now we know the molar mass of
is 161.97g.
We are given the amount of grams used in the solution. So let's find how many moles that were used:
We are asked to calculate the molarity, and we know the molarity formula is as follows:
We just calculated the number of moles that were used, and we are given the amount of solution (in mL, but we can convert 630 mL to 0.63 L by dividing by 1000 since there are 1000 mL in 1 L). So let's plug in the values to calculate for molarity:
So now we know that
the molarity of the solution is 0.12 M.