Chemistry

Consider a gas cylinder that contains 5.79 moles of N_(2)(g) No other gas molecules are present inside the cylinder. The volume occupied by the gas is 1,219.06 mL when the temperature of the cylinder is 298 K What is the pressure in the cylinder? Express your answer in units of atm using at least three significant figures. square

Unit conversion and Unit Prefixes Make the following conversions: 6) 34 meters to centimeters 4.5 liters to milliliters 2) 987 millimeters to meters 7) 21.7 grams to kilograms 3) 87,666 milligrams to grams 8) 000088 kiloliters to liters 4) 0.54 centigrams to grams 9) 33 centimeters to meters 5) 221 meters to millimeters 10) 72.2 kilograms to grams 11) One mole of ammonia molecules weighs 17.0 grams. How much would 0.25 moles of ammonia molecules weigh? 12) One mole of fluorine atoms weighs 190 grams. How many moles of fluorine atoms are in a sample weighing 57.0 grams? 13) One mole of oxygen atoms weigh 160 grams. How much would 24 moles of oxygen atoms weigh? 14) One mole of carbon dioxide molecules weighs 44.0 grams. If you exhale 0.55 grams of carbon dioxide, how many moles of CO_(2) is this? 15) A rollercoaster will travel 30.0 meters in one second. (30m/s.) How many kilometers will it travel in one hour?

Select the correct answer(s)from the list(s). (1 point) Large molecules are built from smaller units called square

C_(2)H_(5)OH+3O_(2)arrow 2CO_(2)+3H_(2)O+1367kJ What is the ratio between the energy and oxygen? (-1367kJ)/([?]molO_(2)) Fill in the green blank.

This reaction is oxidation: Ni(s)arrow Ni^2+(aq)+2e^- A True B False

8. What is the Law of Conservation of Matter (Mass)?

It is safest to heat the contents of test tubes in a flame while seat. True False

any time chemicals, heat or glassware are used. advise your science instructor that you wear contact lenses. you do not have to wear protective goggles take them out before starting the lab. keep the information to yourself.

Match each of the following vocabulary terms to the correct definition. element square single type of atom [Choose] [Choose] a type of pure substance where the particles are made of 2 or more different types of atoms a substance made of two or more different types of particles that looks the same throughout a substance made of two or more different types of particles that looks different throughout square compound homogenous mixture heterogenous mixture square

In what situations should you wear safety glasses? When observing a reaction When mixing chemicals All of the above Measuring out distilled water