Calculate the mass of 6.9 moles of nitrous acid (HNO2). Show your work by including all values used to determine the answer. Round to 2 Significant Figures for full credit. (Molar mass of H = 1.0079 g/mol; N = 14.0067 g/mol; O = 15.9994 g/mol)
the mass of 6.9 moles is 33

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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it means there are 3 atoms of oxygen

here is table 2-2:

country

percent of eligible voters that voted

rank

united states

44.9%

138

canada

60.1%

107

costa rica

84.6%

14

hungary

66.9%

82

japan

57.0%

118

egypt

27.7%

159

south africa

85.5%

10

ans is no, the data set cannot be plotted as a single circle graph