How many moles of silicon, si, are in 1.75 * 1024 si atoms?

Why is it impossible for a gas to take the shape of its container? A. Molecules in a gas are very far apart. B. Molecules in a gas are shapeless. C. Molecules of a gas are stationary. D. Molecules of a gas easily interact with one another.

Consider the following intermediate chemical equations. CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g) 2H2O (g) → 2H2O (1) Which overall chemical equation is obtained by combining these intermediate equations?

Explain why metric prefixes are used, what is the common denominator between them?

What might be useful for adding solids to a tube A / syringe B / wire crimpers C / funnel D / shovel

Which of these chemical formulas represents both an element and a molecule? NaCl O2 He SO2

Which statement is true about inorganic compounds? A. They are not made of atoms. B. They contain carbon. C. They are not made from living things. D. They are all elements.

Which domain do you find the most interesting why

Complete the matching exercise below by choosing the correct description of each bond type in aqueous solution. 1. covalent bond 2. hydrogen bond 3. electrons shared by atoms a. electrons shared by atoms b.

One mole of calcium ions has the same number of representative particles as which of the following? one mole of calcium nuclei one mole of calcium atoms 6.02 x 1023 calcium ions All of these are correct.

How is chemical symbol and chemical formula difference?