20 g of nh4cl is added to 13.9 g of water. calculate the molality of the solution.

Is Light a Wave or a Particle?

What In the formula Na3PO4 how many moles of sodium? How many moles of phosphorus? How many moles of oxygen?

Javier and Jessica are measuring the water temperature of a stream. Javier records the water temperature at 56°. Jessica tests the water at the same location but finds the water temperature is 13°.

A 13.0 kg iron weightlifting plate has a volume of 1650 cm3. What is the density of the iron plate in g/cm3?

A decomposition occurs when you open a can or bottle of soda. Carbonic acid, H2CO3, is in carbonated beverages. It decomposes into carbon dioxide and water. If you leave an open soda can out for a long time, it loses its fizz.

Which of the following is NOT true of nitrogen fixation? (A) it is a process that occurs exclusively in some species of prokaryotes (B) it sometimes occurs in bacteria that are mutualistic symbionts in plant roots (C) it is the metabolic process

What two pieces of information do u need to describe force

Why are the atomic masses for most elements not whole numbers?

An aqueous solution is 0.387 m in hcl. what is the molality of the solution if the density is 1.23 g/ml?

Carbon monoxide reacts with oxygen to form carbon dioxide. 2 CO (g) + O2 (g) → 2C02 (8) In a 1.00 L flask, 3.40 atm of CO reacts with 2.60 atm of O2. Assuming that the temperature remains constant, what is the final pressure in the flask? 4.30 atm 2.