Select all of the answers that apply. what are the two main ingredients in air? oxygen carbon dioxide nitrogen helium hydrogen

How to find the mass number of an element?

Why is ethanol soluble in water but not propane?

Which group of elements are considered to be in the same family? A. helium, neon and argon B. potassium, calcium and scandium C. manganese, iron and cobalt D. hydrogen and helium

Why is sodium more reactive than magnesium

Five elements named after color

A5.00 liter ballon of gas at 25 degree Celsius is cool to 0 degrees Celsius. What is the volume (liters) of the ballon?

How much thermal energy (q) is required to heat 15.2 g of a metal (specific heat = 0.397 J/G) from 21.0 degrees C to 40.3 degree C

Two gas jars are connected to each other, but they are separated by a closed valve. One gas jar contains oxygen, and the other is empty. What will happen when the valve is opened?

4. Calculate the final concentration if water is added to 1.5 L of a 12 M NaOH solution to make 3.0 L of a diluted NaOH solution. Your answer

Why is it possible to safely drink a solution that contains a 50:50 mixture of equal concentrations of a strong acid and a strong base, either of which, if ingested separately, would be very caustic and damaging?