What is an alkali?

a) A substance that will neutralise an acid

b) A substance that produces H + ions when added to water

c) A soluble base

d) A chemical which changes colour when added to acids and alkalis

What do scientists use to predict the locations of electrons in atoms? probability algebra geometry ratios and proportions

Which chemical formula shows an ionic compound? A. CO2 B. N2O C. NaCl D. C6H12O6 ]

Explain how changing the concentration of reactants can affect the rate of reaction.

Which sample of water contains particles having the highest average kinetic energy? A) 25 mL of water at 95°C B) 45 mL of water at 75°C C) 75 mL of water at 75°C D) 95 mL of water at 25°C

If 22.5 L of nitrogen at 748 mm Hg are compressed to 725 mm Hg at a constant temperature. What is the new volume

Which combination of protons neutrons and electrons is correct for the isotope of copper - 63?

What is the purpose of a domain?

What is the ideal gas constant? A. It is a constant that applies only at STP. B. It is a specific constant for a particular gas. C. It is a universal constant used for all gases. D. It is a constant that depends on the conditions.

The greenhouse effect is a result of the Sun's energy being absorbed by objects on the Earth and converted into which type of radiation? A) Radio B) Visible C) Infrared D) Ultraviolet

Which was the limiting reactant: the zinc or the hydrochloric acid? Remember that the limiting reactant is completely consumed in a reaction and no new product is formed unless more of the limiting reactant is added.