What is an isotope? Compare the following isotopes. C-12, C-14 and C-16.

What unit do scientists use to measure atoms?

The formula of the hydrogen ion is often written as

The gas usually filled in the electric bulb is? 1. nitrogen 2. hydrogen 3. carbon dioxide 4. oxygen

Five moles of monatomic ideal gas have initial pressure 2.50 * 103 Pa and initial volume 2.10 m3. While undergoing an adiabatic expansion, the gas does 1480 J of work. What is the final pressure of the gas after the expansion?

What are the three forms of seismic waves and tell what type if wave they represent

Select the best answer for the question. 13. Which statement accurately describes the relationship between mass and weight? A. An object with twice the mass of another object will weigh twice as much B.

Which of the following accurately describes carbon atoms? A. When carbon atoms bond to other carbon atoms, they can only form triple bonds. B. Carbon atoms can bond to other carbon atoms. C.

On a separate sheet of paper, write the formulas for each of the following, complete and balance 1. iron + copper (II) sulfate 2. potassium chloride + mercury (I) sulfate 3. sulfur + oxygen

Match the substance with its chemical formula. 1. H + hydroxide ion 2. H3O + hydronium ion 3. OH - hydrogen ion

Which of those molecules are polar. Co2, So2, CH2Cl2, PCl3