Express the answer in scientific notation & observe significant figure rules. (1.8 x 10-2) : (9 x 102) =

A gaseous compound containing hydrogen and carbon is decomposed and found to contain 82.66 % carbon and 17.34 % hydrogen by mass. The mass of 158 ml of the gas, measured at 556 mm Hg and 25 ∘C, is found to be 0.275 g.

What are three types of sicknesses and

Automotive airbags inflate when sodium azide decomposes explosively to its constituent elements. How many grams of sodium azide are required to produce 30.5 g of nitrogen?

Determine the mass of KNO3 that dissolves in 100. grams of water at 40 degrees celsius to produce a saturated solution

How did arrhenius describe acids and bases?

What are the products of photosynthesis? A. Glucose and oxygen B. Oxygen, solar energy, and glucose C. Carbon dioxide, water, and solar energy D. Hydrogen, oxygen, and carbon

A sample of a substance that has a density of 0.824 g/mL has a mass of 0.421 g. Calculate the volume of the sample.

The tyndall effect is used to detect A: suspensions B:liquid solitions C:tyndalls D:colloida

Which of the following is not an empirical formula? A. C3H8O B. Sb2S3 C. C2N2H8 D. BeCr2O7

The molar heat of fusion for water is 6.01 kJ/mol. How much energy must be added to a 75.0-g block of ice at 0°C to change it to 75.0 g of liquid water at 0°C?