General Chemistry Answers

1. How many calories would a 400.0 gram sample of water

 have to absorb to change the temperature from 15.0 °C to 95 °C?

Is F-F a polar covalent or non polar covalent

Calculate the relative molecular mass if 10g of gas A which occupied 13.2DM³ at s.t.p

if 2.00 mol of oxygen equals 3.00 mol of aluminum how many moles of oxygen are present with 0.83 mol aluminum

To a solution containing 5.00 g  and 29.0 g  in 12.1 g of water at 100 °C, an additional 10.0 g of water are added, and the solution is cooled to 0 °C.

A weak acid is titrated with a 0.100 M solution of NaOH.

If the pH at the midpoint is 4.2, what is the pK_a of the acid?

To a solution containing 5.00 g  and 29.0 g  in 12.1 g of water at 100 °C, an additional 10.0 g of water are added, and the solution is cooled to 0 °C.

Calculate the frequency in hertz of electromagnetic radiation that has a wavelength of 720.0 nm. (c = 3.00 X 10⁸ m/s)

A sample of gas has a volume of 2.0 L at a pressure of 1.5 bar. If the gas is compressed to a volume of 1.0 L at constant temperature the pressure will be:

How many grams of Fe are produced by reacting 2.00 kg of Al with 300 g Fe₂O₃?