A 20 g piece of metal with specific heat 0.4 J/g.°C absorbs 3.9 kilojoules of heat,

calculate the change in temperature. Formula: Q = mcAT

Explain what a polar bond is and how the electronegativities of the two atoms in the bond compare.

What is normal body temperature in degrees celsius? express your answer numerically in degrees celsius?

Physical Changes A. are only caused through burning a material B. cannot be detected by the naked eye C. do not change the identity of the substance D. change the identity of a substance

What makes the atomic radius change along a period in the periodic table

How much heat, in kJ, is required to convert 36.82 grams of water at 100°C to steam? (ΔHvap = 40.657 kJ/mol.)

Why have some chemicals been banned from usage in agriculture/food production

Which of the following is a pure substance

What is 825640 in scientific notation

Which type of substance can conduct electricity in the liquid phase but not in the solid phase? metallic element molecular compound nonmetallic element ionic compound

Differentiate between the significance of the coefficients in a balanced chemical equation