Calcium phosphate is the primary mineral your body uses to build and strengthen

Question

Calcium phosphate is the primary mineral your body uses to build and strengthen bones and teeth. What is the molar mass of calcium phosphate Formaldehyde has the formula CH^2O. How many molecules are there in 0.11 g of formaldehyde Determine the number of moles of aluminum in 96.7 g of Al. Choose the proper set of coefficients for each substance to balance this equation. Given that 4NH^3(g) + 50^2(g) 4NO(g) + 6H^2O(g), if 32.5 g of NH^3 react with sufficient oxygen, how many grams of H^2O will be formed What particle is transferred from one reactant to another in oxidation-reduction reactions Based on the solubility rules, which of the following will occur when solutions of ZnSO+(aq) and MgCl2(aq) are mixed.

Explanation / Answer

13. Molar mass of calcium phosphate,

C) 310.18

14. Formaldehyde molecules in 0.11 g CH2O,

D) 3.7 x 10^-3

0.11/30.031 = 3.7 x 10^-3 mols

15. moles of Al in 96.7 g Al

B) 3.58 mol

mol of Al = 96.7/26.98 = 3.58 mols

16. For the given reaction, coefficients would be,

C) 1,3,2,2

17.mass of H2O formed in reaction,

E) 878 g

mass of water = 32.5 x 6 x 18.02/4 = 878 g

18. Particle that gets transferred in an oxidation-reduction reactions is,

D) electron

19. According to solubility rules,

C) MgSO4 will precipitate

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