What is the element K2SO4 and is it ionic, covalent or polyatomic

If an atom has the electron configuration 1s22s22p 1, how many electrons must it gain to achieve an octet?

When is a molecular compound named as an acid?

Laurie is moving a dresser with a mass of 250kg. She does 126 J of work with a force of 14 N. How far does she move the dresser?

If 3.52 L of nitrogen gas and 2.75 L of hydrogen gas were allowed to react, how many litres of ammonia gas could form? Assume all gases are at the same temperature and pressure.

What is the voltage of a galvanic cell made with magnesium and gold

For the reaction 2Fe + 3Cl2 → 2FeCl3 which of the following options gives the correct reactant:reactant ratio? Fe:Cl2 = 1:1 Fe:Cl2 = 2:3 Fe:Cl2 = 3:2 Fe:FeCl3 = 1:1

A 2.575 g piece of gold (specific heat = 0.129 J/g°C) at a temperature of 75°C is placed into cold water at 10°C. If the gold loses 10.0 J of energy, what is its final temperature in the water? Enter your answer to the nearest whole number of °C.

The complete combustion of gaseous sucrose at a constant pressure absorbs 544 kj of heapt per mole of surcrose. write the balance thermochemical equation for the reaction

Find the acceleration if a car goes from 40 to 50 mph in 5 seconds

What is the percent by mass of nahco3 in a solution containing 10 g of nahco3 dissolved in 400 ml of h2o?