Give three examples of elements that are gases at room temperature

Suppose two students need to prepare three solutions, each one-half as concentrated as the previous, from a stock solution. (a) One student dilutes 10 mL stock solution to a final volume of 20 mL.

What is hardest type of coal?

What is neon: metal, non-metal, or metalloid?

Insoluble sulfide compounds are generally black in color. Which of the following combinations could yield a black precipitate?

Any advice for a GCSE chemistry student sitting first chemistry paper?

What is the mass (in grams) of 9.09x10^24 molecules of methanol (CH3OH) ? AND How many moles of N are in 0.183g of N2O?

What are the basic building blocks of matter? A) molecules B) atoms C) electrons D) compounds

How does an atom with too few neutrons relative to protons undergo radioactive decay? * by converting proton to a neutron by converting a neutron to a proton by emitting an alpha particle

What is the chemical formula for the compound formed between sodium and iodine?

8. Write a balanced chemical equation showing how you could prepare each of the following salts from an acid-base reaction: KNO3, NaBr, and Cas.