Why are proportional relationships useful in science

Ethanol is used widely as a solvent in laboratories for various chemical reactions. A laboratory technician takes 50.0 mL of ethanol and dilutes it to 100.0 mL with distilled water.

Ammonia gas combines with excess oxygen gas to produce nitric oxide and water. How many grams of ammonia gas would have to react in order to release 154 kJ of energy

Henry puts 2.0 grams of baking soda into a 1.0 gram plastic bag. He then pours 5.0 grams of vinegar into the bag and immediately closes it. A reaction takes place.

A plant species has two possible gene variations for seed shape. One plant has smooth seeds, and another has wrinkled seeds. There is a no chance that their offspring will be born with wrinkled seeds. What can u conclude from this information

This common acid is found in the kitchen the bathroom and sometimes in the medicine cabinet. What is the name of this acid?

Which atomic orbitals overlap to form the C-O bond of dimethyl ether, (CH3) 20? O c 2sp^3 + 2sp^3 OC 2sp^2 + 0 2p O c 2sp^2 + 0 25p^2 O C 2sp^3 + O 2sp?

For the reaction CO+2H2=CH3OH at 700 K, equilibrium concentrations are [H2]=0.072 M, [CO] = 0.020M, and [CH3OH] = 0.030 M. Calculate K

How to make fluffy slime without contact solution?

When you mixed 20 grams of magnesium and an excess of nitric acid, 1.7 grams of hydrogen was actually produced. What is the percent yield of hydrogen during this reaction? Mg + 2HNO3 Mg (NO3) 2 + H2 3.3 % 48.5 % 25.7 % 102 % 98 %

A small cubical furnace 50 by 50 by 50 cm on the inside is constructed of fireclay brick [k = 1.04 W/m. degree C] with a wall thickness of 10 cm. The inside of the furnace is maintained at 500 degree C, and the outside is maintained at 50 degree C.