In the following chemical reaction, how many moles of n2 are needed to completely react with 3 moles of h2? n2 3 h2 2 nh3

a. 2

b. 3

c. 6

d. 7

If the temperatures of separate 35 g samples of gold, mercury, and carbon are to be raised by 10.0°C. How much heat must be applied to each substance?

Calculate the % of SO42 - in BaSO4, if 2.00 g of SO42 - are present in 5.00 g of BaSO4.

I need to know why the sky I'd blue?

What evidence supports the idea that all the continents were once joined together? A. Similar rocks found on different continents. B. Mountains created by colliding continents. C. Evidence of glaciers in unexpected places. D. All of the above.

When calcium carbonate (CaCO3) is dissolved in water (H2O), what happens? Group of answer choices

Which answer choice correctly lists the elements found in Period 2 of the periodic table? A. oxygen, fluorine, neon B. sodium, magnesium, aluminum C. nitrogen, phosphorus, arsenic D. beryllium, magnesium, calcium

Write the chemical formula for each compound described. a) barium chloride (1 Ba ion, 2 Cl ion)

Acetonitrile (CH3CN) is an important industrial cheical. Among other things, it Is used to make plastic moldings, which have multiple uses, from car parts to Lego bricks. Which statement below about acetonitrile is FALSE? a.

State the difference between sugar in water and pebbles in water

What is the molar mass of Sr?