Answer:
Explanation:
Because if the equation is truly balanced, the elements on one side equal the element numbers on the other. Take a simple example.
Ba(OH)2 + 2HCl ==> BaCl2 + 2HOH
Now consider what is true.
Element Number of the left Number on the right.
Ba 1 1
O 2 2
H 4 4
Cl 2 2
Nothing has changed going from the left to the right. You may wonder how you get 4 for the hydrogens.
Ba(OH)2 has 2 hydrogens. You multiply the 2 by the hydrogens in the brackets.
2HCl = The 2 in front affects both the hydrogens and the chlorines. There are 2 hydrogens from the HCl
Total: 2 + 2 = 4 hydrogens. The right side is done the same way.
You are not getting different results on the right side than those that you had on the left. Mass is preserved. 1 Ba + 2 Os + 4Hs and 2 Cls on the left, gives the same numbers on the right. There is no loss of mass.
Answer:
Heating a certain substance causes molecules to speed up and spread slightly further apart, having a larger volume that results in a decrease in the density. Cooling a substance causes molecules to slow down and get closer together, occupying a smaller volume that results in the increase in density.
Explanation:
Answer:
layers of rock get folded
M = m/L
moles of CaO = 2.75g / molar mass
2.75g/ 56.08g = 0.049moles CaO
155mL / 1000 = 0.155 L
M= 0.049moles/0.155L
M=0.316
Yes, refer to the previous answer.
