Answer:
the answer should be A. the sum of all forces acting on an object
Explanation:
Answer:
Zn. + 2 HCl ----------> ZnCl2. + H2
Explanation:
Mass of Zn in mole = 3.27/ 65.38= 0.050010.... mol
Mass of HCl in mole = 3.3/ 73= 0.044....mol
Hence, limiting reagent is HCl
Molar mass of ZnCl2= 136.38g
Let mass of ZnCl2 be x
x = 3.3*136.38÷ 73 = 6.165...
So, the mass of ZnCl2 is 6.17 g
Answer:
2 significant figures i.e. 2 and 7.
Explanation:
We need to find the number of significant figures in the given number i.e. 
.
It has 2 significant figures i.e. 2 and 7.
It means the power of 10 doesn't count in the significant figures.
Hence, there are 2 significant figures.
Answer;
Molar mass of water is 18.02 g/mol
Explanation;
-Molar mass of a compound is determined by adding the relative atomic mass of each atom present in the compound. Molar mass of one mole of a compound, it is the weight in grams of 6.02 × 1023 atoms or molecules.
-Therefore; to calculate the molar mass of Water (H2O); we first know the RAM of hydrogen and oxygen which are; H=1.01 and O= 16.00
Since there is two atom of hydrogen and one atom of oxygen in water;
Then; the Molar mass of water will be; 2×1.01 + 1 ×16 = 18.02 g/mol
