can you please explain the answers 24. Balance the equation below using the smallest set of...
24. Balance the equation below using the smallest set of whole numbers. What is the coefficient of H2O? __PC(O) +_HO(1) ►_H3PO3(aq) + HCl(aq) A) 1 B) 2 C) 3 D) 5 E) none of these 25. How many atoms are in 5.54 g of F? A) 6.02 x 10- atoms B) 0.146 atoms C) 0.292 atoms D) 8.78 x 10" atoms E) 1.76 x 10" atoms silicon atoms is 26. The mass of 1.63 x 10 A) 2.71 x 10-...
5. What is the mass of 1.63 x 1021 silicon atoms? (A) 2.71 x 10 g (B) 4.58 x 1022g (C) 28.08 g (D) 1.04 x 10 g (E) 7.58 x 102 g
CHEM 1411. Review Exercises for Chapter 3, 7, 8. F19 1. Give the number of lone pairs around the central atom and the geometry of the ion CIO2 A) 0 lone pairs, linear 1 lone pair, bent B) C) 2 lone pairs, bent D) 3 lone pairs, bent E) 3 lone pairs, linear 2. Predict the geometry and polarity of the CS2 molecule. A) linear, polar B) linear, nonpolar C) tetrahedral, nonpolar D) bent, nonpolar E) bent, polar 3. Which...
can you please explain the answers 19. One nanogram does not seem like a very large number. How many magnesium atoms are there in 1.00 ng of magnesium? A) 4.11 x 10- atoms B) 2.48 x 10" atoms C) 6.83 x 10" atoms D) 6.02 x 10 atoms E) 1.46 x 10" atoms 20. How many moles of O atoms are in 25.7 g of CaSO.? A) 0.189 mol B) 0.755 mol C) 4.00 mol D) 1.14 x 10” mol...
if you can't answer all ,please don't answer 1) of the reactions below, which one is a decomposition reaction? A) Ca(NO3)2 + Na2S -- CdS +2NaNO3 B) NH4Cl- NH3 + HCI C) 2Mg + 02 - 2MgO D) 2N2 + 3H2 → 2NH3 E) 2CH4 + 402 - 2002 + 4H20 miches of - x 1? 2 2) Calculate the percentage by mass of ammonia in cisplatin, PtCl2/NH3 12. A) 12.53 B) 5.68 C) 18.09 D) 11.35 E) 4.67 3)...
What is the coefficient of H.So, when the following equation is properly balanced with the smallest set of whole numbers? __Cas(PO4h + H2SO4 - Caso + HPO. A) 3 B) 8 C) 10 D) 11 2) What is the coefficient of H20 when the following equation is properly balanced with smallest set of whole numbers? ALC + H2O - AM(OH), + CHE A) 3 B) 4 C) 6 D) 12 E) 24 3) of the reactions below, which one is...
can you please show steps for the first question and explain the answers for the other two questions? 1A. A solution of a 6.0 M solution of a weak acid is 0.16% ionized. What is the K, of the acid? (4 points) 13. Which of the following is a Lewis acid-base reaction? a. CH3Br + CH3Cl → CH3Cl + HBO b. •CH3 + .CI → CH3CI C. NaCl + AgNO3 → AgCl + NaNO3 d. Cl2 + PCl3 → PCI...
can you please explain the answers 9. Based on the solubility rules, which one of the following compounds should be insoluble in water? A) Na2SO4 B) BaSO4 C) CuSO4 D) MgSO4 E) Rb2SO4 10. Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O → Ca(OH)2 + Ni(OH)2 A) Cd B) Ni02 C) HO D) Ca(OH)2 E) Ni(OH)2 11. The oxidation number of Cl in CIO3 is A) -1 B) +7 D) +3 E) None of...
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...
can you explain . thank you ! Ala certain temperature, the data below were collected for the reaction 21CI+H2 -> 12 + 2HCI Determine the rate constant for the reaction H2 (M) ICHM) RATE (Ms) 02 0.00250 0.15 0.00188 02 000500 A B M5 x 10-2 B 0219 C.0875 D. 0.125 E 0625 F. answer not sted G.625 x 102 H 0.175 10.156 A 0.650 Mmonoprotic weak acid solution has a pH of 1.50. What is the pK, of this...