A sample of hydrogen gas, has a volume of 8.56 L at a temperature 0oC and pressure of 1.5 atm. Calculate the number of moles of hydrogen present in this gas sample (Assume that the gas behave ideally)

When 1.98 g of NaOH (molar mass = 40 g/mole) are added to 75.0 mL of a 0.350 M HCl solution in a coffee-cup calorimeter, the temperature changes from 21.7°C to 25.8°C. If the resulting solution has a mass of 78.

Why is the puddle underneath a melting ice cube as cold as the ice cube itself

A gas occupies 2.0 L at 353 Kelvin what temperature will it be if it occupies 0.85 L

The reaction is called chain reaction when a. it is one that can be initiated by light b. it involves free radicals that have an unusual stability and thereby cause a large quantum yield c.

U HUCUS 13 HUU 15. The nucleus of an atom is a. the central core and is composed of protons and neutrons b. positively charged and has more protons than neutrons C. negatively charged and has a high density negatively charged and has a low density

23 Which term identifies a type of organic reaction? (1) deposition (3) esterification (2) distillation (4) sublimation

several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear is white. What process led to to this difference in fur color.

What will be the outcome of putting litmus paper into bleach? a. red paper turns blue, blue paper turns red b. red paper does not change, blue paper turns red c. red paper turns blue, blue paper does not change d.

What makes it possible for ships to float?

How many moles of water will be produced when 3 moles of ethane are burned