What happened to the number of moles in a sample that originally occupied 500mL with 2.50 moles and then occupied 750mL?

It deals with gas laws

A radioactive substance used in nuclear weapons decays at the rate of 3.33.3 % per year. calculate the half-life of the radioactive substance.

Why does mass wasting occur faster on a steep slopes? A. There is less resistance on steep slopes. B. The force of gravity causes mass wasting to occur faster. C. Rain falls on steep slopes often which wears them away faster. D.

When dissolved in water, koh behaves as an acid that forms k + and oh - ions. a base that forms ko - and h + ions. a base that forms k + and oh - ions. an acid that forms ko - and h + ions?

A vessel is full of a mixture of kerosene and petrol in which there is 18% kerosene. Eight litres are drawn off and then the vessel is filled with petrol.

During cellular respiration which of the following is equal to the number of atoms of carbon in glucose? A. Number of atoms of oxygen in water B. Number of atoms of carbon in carbon dioxide C.

Which type of reaction occurs in the following? 2HgO (s) - - 2Hg (l) + O2 (g) 1. a decomposition reaction in which a metal is reduced 2. an acid-base neutralization reaction to produce oxygen gas a displacement 3.

Is pulverizing an aspirin a physical or chemical process

Explain two reasons why we can conclude that the rise of the water in the glass tube is due to root pressure and not transpiration or capillarity

Four type of molecular models

How many particles are in 1 mol of carbon? 1 mol of lithium? 1 mol of eggs? will 1 mol of each of these substances have the same mass?