How many moles are in 25 grams of HF

Can be shown to be congruent by a sequence of reflection and translation

A chemist makes 760. mL of calcium bromide (CaBr) working solution by adding distilled water to 290. mL of a 3.18 M stock solution of calcium bromide in water.

How many years about was most of North America in the southern hemisphere?

For the reaction 2N2O5 (g) 4NO2 (g) + O2 (g), the following data were colected: t (minutes) [N2O5] (mol/L) 0 1.24x10-2 10 0.92x10-2 20 0.68x10-2 30 0.50x10-2 40 0.37x10-2 50 0.28x10-2 70 0.

Which of the answer choices best describes elements? homogeneous mixtures, always solid, pure substances, very dense.

C AL = - 4.184 * 39.85 * 4.7 : 11.98 * (-72.9)

2 CO (g) + O2 (g) → 2 CO2 (g)

3h2 (g) + o3 (g) 3h20 (g) arrow after the o3 (g) whats the overall enthalpy?

For the reaction represented by the equation cl2 + 2kbr ® 2kcl + br2, calculate the percentage yield if 200. g of chlorine react with excess potassium bromide to produce 410. g of bromine.

The surface area and depth of the Pacific Ocean are 1.8 X 10^8 km^2 and 3.9 X10^3 m respectively, Calculate the volume of the Pacific Ocean in liters.