Answer to Question #68760 in General Chemistry for Jack

Question

25) The atomic number (Z) is the number of:
a. Neutrons and protons
b. Electrons and neutrons
c. protons
26) The mass number is the total number of
a. electrons+ Protons
b. electrons+ neutrons
c. none of these.
27) Atoms that have same atomic number but different mass number are called
a) Isotopes
b) Ternary atoms
c) Allotropes
Q3:
a) How would you prepare 60.0 mL of 0.200 M HNO3 from a stock solution of 4.00 M HNO3
b) Calculate the pH of a 0.0010 M solution of formic acid, HCO2H.
a. HCO2H + H2O ↔ HCO2- + H3O+ Ka = 1.8 x 10-4
c) Calculate the pH values of a solution of sodium hydroxide whose [OH–] is 1.05 x 10–3?
Q5:Write the names of the following compounds:
FeO
BaCl2•2H2O
N2O
HNO3
HCLO4
CO2
Q7:Classify the chemical reactions in the following equations: 10
a) Na2CO3 à Na2O + CO2.
b) Cu + AgNO3 à CuNO3 + Ag.
c) Zn + HCl à ZnCl2 + H2.
d) H2+ Cl2 à 2HCl

Answer 1

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