How many moles of bromine (Br) atoms are in a sample of 2.03 * 1024 atoms?

Which describes John Dalton's observations of elements in any given compound? Their masses are always equal. Each element always contributes the same number of atoms. Atoms of different elements always combine in the same way.

Write the chemical equation for the reaction of propylamine, c3h7nh2 with water.

How many grams are in 15.3 moles of gold?

Compare the volume of 14.1 g of helium to 14.1 g of argon gas (under identical conditions).

He process by which plants and animals incorporate the NO3 - and ammonia formed through nitrogen fixationand nitrification

A. Write an equation for determining the number of moles of NaOH that are added to the flask based on [NaOH] and volume of NaOH titrant (mL NaOH): B.

Is romano cheese an element, compound, homogeneous mixture, or heterogeneous mixture?

Which of the following is an appropriate food storage method

Why should your disposal of excess magnesium take place in a fume hood? (choose all that apply) Group of answer choices The quench released hydrogen gas, which is flammable and explosive The quench is highly exothermic and might cause the solvent to

For the chemical equation SO2 (g) + NO2 (g) SO3 (g) + NO (g) SO2 (g) the equilibrium constant at a certain temperature is 3.00. At this temperature, calculate the number of moles of NO2 (g) that must be added to 2.30 mol SO2 (g) in order to form 1.