The atomic number tells you the number of what in one atom of an element?

Which element has the weakest attractions for electrons in chemical bond

A reaction requires 22.4 L of gas at STP. You have 30.5 L of gas at 101.5 kPa and 373 K. Which of the following statements is true? (Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K.) A. You will have excess gas for the reaction. B.

What ions are released when acid is mixed with water

Calculate the mass of a 28.0 wt% KOH solution required to make 800.0 mL of 0.436 M KOH.

Which statement about gas effusion is true? A. Lighter gases effuse faster than heavier gases. B. Lighter gases effuse slower than heavier gases. C. Effusion is not related to the molar mass of gases. D. Light and heavy gases effuse at the same rate.

The density of HCN (hydrogen cyanide) gas at STP is 1.21g/L. What volume will 100.0g of HCN occupy at STP? A) 121 L B) 0.012 L C) 82.6 L D) none of the above

A 20.0 ml sample of 0.150 m ethylamine is titrated with 0.0981 m hcl. what is the ph after the addition of 5.0 ml of hcl? for ethylamine, pkb = 3.25

Some polymers are elastic because they are made of a. carbon. c. sugar and alcohol. b. phosphate ladders. d. cross-linked chains.

The hot converting blank is the layer of rock between the earths crust and core

Compare the compressibility of gases and liquids. Support your answer by describing the arrangement of particles in gases and liquids.