A compound contains 15.94% boron with the remainder being fluorine. What is the

Question

A compound contains 15.94% boron with the remainder being fluorine. What is the empirical formula of the compound? a. BF b. BF_2 c. B_2F_3 d. BF_1 e. B_2F_5 Phosphorus trichloride may be prepared by the reaction of phosphorus with chlorine gas according to the equation below. P_4 + CI_2 rightarrow PC1, When the equation above is properly balanced with the smallest whole numbers, the respective coefficients are: a. 2,6,8 b. 1, 2,4 c. 2,3,2 d. 1,6,4 e. 3,9,3 When glucose undergoes complete combution, the products are carbon dioxide and water. C_6H_1 2O_5 + O_2 rightarrow CO_2 + H_2O When the equation above is properly balanced with the smallest whole numbers, the respective coefficients are: a. 1,9,6,6 b. 1,6,6,6 c. 2,12,6,12 d. 2,12,12,12 e. 1,9,12,12 The balanced equation for the combustion of bustane, C_4H_10, is a. c_4H_10 + 130_2 rightarrow 4 CO_2 + 5H_2O b. 2C_4H_10 + 130_2 rightarrow 8CO_2 + 10H_2O c. 2c_4H_10 + 2 30_2 rightarrow 8 co_2 + 5H_2O d. C_4 H_10 + 160_2 rightarrow 4 co_2 + 10H_2O e. C_4H_10 + 230_2 rightarrow 16CO_2 + 5H_2O Nitrogen oxide is oxidized in air to give brown nitrogen dioxide. 2NO (g) + O_2 (g) rightarrow 2 NO_4 (g) If you have 2.2 moles of No, a. you need 2.2 moles of O_2 for complete reaction and produce 2.2 moles of No_2. b. you need 1.1 moles of O_2 for complete reaction and produce 2.2 moles of No_2. c. you need 2.2 moles of O_2 for complete reaction and produce 3.3 moles of No_2. d. you need 1.0 moles of O_2 for complete reaction and produce 2.0 moles of No_2. e. you need 2.2 moles of O_2 for complete reaction and produce 2.2 moles of No_2.

Explanation / Answer

answer 7

option d is correct

answer 8

option d is correct 1,6,4

answer 9

option d is correct 2 , 12 , 12 , 12

answer 10

option b is correct

answer 11

the ratio between NO , O2 and NO2 is 2 : 1 : 2

so option b is correct

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