Calculate the average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 amu) and 1.100% are C-13 atoms (13.003354 amu). Give your answer to the correct number of significant figures.

Discuss why two objects of made of the same type of matter at the same starting temperature with different masses increase in temperature at different rates when the same amount of thermal energy is transferred to each object.

Metallic and nonmetallic mineral resources are considered nonrenewable because Choose one: A. natural processes make minerals much more slowly than we can mine them. B. not every country has deposits of all the mineral resources it needs. C.

What does the nucleus of a atom contain?

A galvanic cell is powered by the following redox reaction: 3Br2 (l) + 2MnO2 (s) + 8OH^ (-) (aq) = 6Br^ (-) (aq) + 2MnO4^ (-) (aq) + 4H2O (l) a. Write a balanced equation for the half-reaction that takes place at the cathode. b.

Which is true of genes A - they are proteins that produce sections of DNA which control the cells activities.

What would happen if you tried to sqeeze a gas into a smaller container?

Paint, paint thinners and some cleaning agents can weaken the shell of a hard hat and may eliminate

A 10 chunk of metal has a specific heat of 0.25 J/g ºC. The temperature is changed from 10ºC to 45ºC. How much heat is required?

In this reaction what is the correct coefficient for sodium chloride? pb (no3) 2? nacl → pbcl2? nano3

Classify each of the following as a path function or a state function. work energy distance traveled enthalpy heat