Calculate the number of molecules in 0.75 moles of CH₄. x 10²³ molecules

Match each gas law with the correct statement. Boyle's Law Charles's Law Gay-Lussac's Law A. The pressure of a gas varies directly with temperature if the volume is kept constant. B.

Calculate the pH of a buffer that is 0.13 M in lactic acid and 0.11 M in sodium lactate

A student is testing water to know which is best foe cleansing purposes with soaps. He would find that the cleansing action of soaps is best when he uses water obtained from

If there is a loss of 5.63 x 10-7kg of mass in a nuclear reaction, how many Joules of energy would be released? Recall that c = 3x108 m/s 3.92 x 104 3.92 x 1010 5.07 x 107 5.07 x 1010 6.26 x 10-24

Calculate the approximate number of molecules in a drop of water with a mass of 0.10 g. A. 3 * 1021 molecules B. 2 * 1023 molecules C. 6 * 1021 molecules D. 4 * 1023 molecules

What are the products of photosynthesis? A. Glucose and oxygen B. Oxygen, solar energy, and glucose C. Carbon dioxide, water, and solar energy D. Hydrogen, oxygen, and carbon

A sample of a substance that has a density of 0.824 g/mL has a mass of 0.421 g. Calculate the volume of the sample.

The tyndall effect is used to detect A: suspensions B:liquid solitions C:tyndalls D:colloida

Which of the following is not an empirical formula? A. C3H8O B. Sb2S3 C. C2N2H8 D. BeCr2O7

The molar heat of fusion for water is 6.01 kJ/mol. How much energy must be added to a 75.0-g block of ice at 0°C to change it to 75.0 g of liquid water at 0°C?