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Question 1 of 254.0/ 4.0 PointsHow many significant figures are there in 0.3070 g?A. 3B. 6C. 2D. 5E. 4CORRECT
Feedback: See Chapter 01Question 2 of 254.0/ 4.0 PointsDry ice (carbon dioxide) changes from a solid to a gas at –78.5°C. What is thistemperature in °F?
C. –173°FD. –75.6°FE. none of them are within 2°F of the right answer.°F = °C (9/5) + 32= -78.5°C (9/5) + 32= -141.3 + 32= -109.3°FFeedback: See Chapter 01Question 3 of 254.0/ 4.0 PointsSuppose a house has a floor area of 2,250 square feet. What is this area in units ofsquare centimeters?
D. 6.86 × 104cm2E. 101 cm21 ft = 30.48 cm1 ft2= 929.03 cm22250 ft2(929.03 cm2/1ft2) = 2,090,318 cm22.09 x 106cm2Feedback:See Chapter 01Question 4 of 254.0/ 4.0 PointsThe melting point of picolinic acid is 136.5°C. What is the melting point ofpicolinic acid on the Fahrenheit scale?
E. 107.8 °F°F = °C (9/5) + 32= 136.5 (9/5) + 32= 245.7 + 32= 277.7°FFeedback:See Chapter 01Question 5 of 254.0/ 4.0 PointsLiquid nitrogen boils at –195.8°C. Express the boiling point of liquid nitrogen inkelvin.A. –469.0 KB. all negative temperatures are 0 K on the Kelvin scaleC. –77.4 KD. 77.4 KCORRECTE. 469.0 K
K = °C + 273.15= -195.8 + 273.15= 77.35K
Feedback:See Chapter 01Question 6 of 254.0/ 4.0 Points

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Atom, Chapter 1 2, d, CHEM133