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12. Determine the number of H atoms in 1.22 x 1020 C.Ho molecules. 1.18 x 10exp22...
12. Determine the number of H atoms in 1.22 x 1020 C Ho molecules. 4.46 x...
12. Determine the number of H atoms in 1.22 x 1020 C Ho molecules. 4.46 x 10exp23 H atoms 2.00 x 10exp-23 H atoms 1.18 x 10exp22 H atoms 7.32 x 10exp20 Hatoms 7. A liquid sample has the density of 11.9 g/cmº. Calculate volume in m3 if the mass is 0.225 kg 1.89 x 10exp-4 m3 9.10 m3 11.3 m3 1.89 x10exp-5 m3
15. Determine the net ionic equation for the following chemical reaction: NaOH(aq) + HCl(aq) ----------> NaCl(aq)...
15. Determine the net ionic equation for the following chemical reaction: NaOH(aq) + HCl(aq) ----------> NaCl(aq) + H20 hint: NaOH(aq) is strong base HCl(aq) is a strong acid OH-(aq) + H+ (aq) ----> H2O(1) 20H-(aq) + 2C1-(aq) -----> H2O(l) + C12(8) NaOH(aq) + CIO-(aq) -----> C12(g) + O2(g) + H2(g) + Na(s) H+(aq) + NaOH(aq)- H2O(1)+ Na(s) 13. A compound contains 20.24% Al and 79.76% Cl. Calculate the empirical formula. molar masses: Al = 26.98 g/mole and Cl = 35.45...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
12. Determine the number of H atoms in 1.22 x 1020 C Ho molecules. 4.46 x 10exp23 H atoms 2.00 x 10exp-23 H atoms 1.18 x 10exp22 H atoms 7.32 x 10exp20 Hatoms 7. A liquid sample has the density of 11.9 g/cmº. Calculate volume in m3 if the mass is 0.225 kg 1.89 x 10exp-4 m3 9.10 m3 11.3 m3 1.89 x10exp-5 m3
15. Determine the net ionic equation for the following chemical reaction: NaOH(aq) + HCl(aq) ----------> NaCl(aq) + H20 hint: NaOH(aq) is strong base HCl(aq) is a strong acid OH-(aq) + H+ (aq) ----> H2O(1) 20H-(aq) + 2C1-(aq) -----> H2O(l) + C12(8) NaOH(aq) + CIO-(aq) -----> C12(g) + O2(g) + H2(g) + Na(s) H+(aq) + NaOH(aq)- H2O(1)+ Na(s) 13. A compound contains 20.24% Al and 79.76% Cl. Calculate the empirical formula. molar masses: Al = 26.98 g/mole and Cl = 35.45...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
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