Calculate the mass (in ng) of 2.33 x 1020 atoms of oxygen.

The amount of energy required to move an electron from one energy level to the next higher one is known as: A. quantum of energy B. Aufbau principle C. mass number D. atomic number

Cavendish carried out a second experiment to test the properties of the hydrogen gas produced in the experiment. Was this experiment also a chemical reaction? Explain.

Two chlorides on the carbon of a methane unit are called: (choose one) -methyl chloride -dichloromethane -chloroform -carbon tetrachloride

Which formula represents an acid? A. CH4 B. HCl C. NH3 D. PH3

When will Le Chatelier's principle come into effect?

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction? a. In equilibrium, the forward reaction rate must be greater than the reverse reaction rate. b.

Choose all that apply: Living organisms use atoms from sugar molecules combined with other elements to form: Question 9 options: Lipids Metals Nonmetal atoms Nucleic Acids

12.5ml of 2.0m NaOH neutralizes 10ml og HCL, what is the acid concentration

Can you explan process of budding in yeasts?

A sample of CO2 gas which weighs 1.62 grams has a volume of 1.02 liters when collected at 20oC. What would be the pressure of the gas sample?