Consider the following balanced reaction:

4NH3 (g) + 502 (g) - 4NO (g) + 6H20 (g)

How many grams of ammonia are required to react completely with 40 g of oxygen?

A. 154

B.

179

C. 34 g

D.

19 g

20% humidity is a low level which means there would be less of a chance of it raining. A. True B. False

What will be the observations for the reaction: CuSO4 (aq) + NaOH (aq) its a two mark question so two observations at least.

What is the wavelength of the light emitted that has a frequency of 1.50 x 1013 Hz?

9. What causes water's low vapor pressure? hydrogen bonding covalent bonding dispersion forces ionic attractions

How does a catalyst work? A) it shifts the reaction toward the products B) it changes the pressure of the products C) it increases the temperature of reactants D) it increases the temperature of the products E) it decreases the activation energy

Which of these conclusions can be drawn from Rutherford's experiment? A: Each atom contains electrons. B: The nucleus of an atom can be split. C: Each atom contains protons. D: Atoms are mostly empty space.

Describe one major laboratory accident mentioned in the training presentation, what chemicals were involved, the type of PPE that was worn at the time of the accident, and how it could have been prevented.

Which process creates food for plants in order to maintain homeostasis? Breathing Cell division Cellular respiration Photosynthesis

Describe a proton, neutron, and electron. Where are these particles located inside an atom.

A sample of gas is at 273°K and 2.00 atm with a volume of 6.00 liters. When the gas is compressed to 3.00 liters and the pressure increases to 3.00 atm, what is the new temperature of the sample?