What is the specific latent heat of a fussion for a substance that takes 550 kj to melt 14 kg at 262 k?

How much heat (in kJ) is needed to heat a 200.0 mL sample of water initially at 25.0 °C to a boiling temperature of 100.0 °C?

Calculate the volume in liters of a 0.111 mol/L potassium dichromate solution that contains 125. mmol of potassium dichromate. Be sure your answer has the correct number of significant digits.

Which is the most polar bond? a. H-Se b. P-Br c. N-I d. No right answer.

Consider the β + decay of 116c. part a is this decay energetically possible? the atomic mass of 116c is 11.011434 u.

In the reaction, Al2O3 + __HCl → 3H2O + 2AlCl3, what coefficient should be placed in front of HCl to balance the reaction? 1 2 3 6

Using the periodic table, determine the number of neutrons in a carbon.

Sailin Steve likes to test the buoyancy of different objects. He threw a spherical object into a fluid that has a greater density than the object does. He also threw a square object into the fluid that has a greater density than the fluid.

The sun is directly overhead at the equator on what day of the year? A. Zenith B. Solstice C. Equinox D. Ecliptic Isn't it the Solstice?

In the SI system of units, the mole is one of seven base units. It is frequently used in chemical calculations. However, a mole of something is just a particular quantity of it.

A student used a DCP solution (standardized to 9.98x10-4M) to analyze a sample of extract from 2.50g of solid food. The titration required 22.49mL of DCP. 87.00% of all the ascorbic acid in the food was collected in the extract.