How many grams of oxygen are needed to react completely with 200.0 g of ammonia, nh3? 4nh3 (g) + 5o2 (g) ®4no (g) + 6h2o (g)

a. 469.7 g

b. 300.6 g

c. 250.0 g

d. 3.406 g

e. 2.180 g?

Four people are needed to lift a TV set with a single fixed pulley. How many people will be needed to lift the same TV set with a 2 fixed, 2 moveable pulley system? (Ignore friction.)

To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 4.00 molmol of gas DD measured at 251 ∘C∘C in a 1.

Where would you expect to find an element with the greatest electronegativity?

What are three things that would not dissolve in water

Whats the vocabulary for aquatic biomes

Which material best absorbs sound waves in a room? a. heavy curtains b. hardwood floors c. brick walls d. cement floors

Does density of water depend on the amount of water present?

Which of the following air fronts does not move? a Occluded front b Cold front c Stationary front d Warm front

Kwame wants to measure the volume of water contained in a disposable foam coffe. Which should he use? Nanoliters? Milliliters? Or liters?

Which of the following changes the solid Earth the most?