What gas makes up close to 1/4 of the air surronding the earth?

Sebanyak 4,5 mg magnesium hidroksida (Mg (OH) 2) dapat larut dalam 500 ml air. nyatakan kelarutan Mg (OH) 2 dalam mol L-1

The layer below the active layer of the tundra is called the

An anhydrous form of a compound is 38.95% of the mass of its heptahydrate form. Calculate it's molar mass.

What is the weight in grams of 3.36 * 1023 molecules of copper sulfate (CuSO4) ?

In this experiment, you will use a track and a toy car to explore the concept of movement. You will measure the time it takes the car to travel certain distances, and then complete some calculations.

Evaluate - if you put a scale in an elevator and weigh yourself as you ascend and the descend, does the scale have the same reading in both instances?

Why would you add a catalyst to something

A sample of the sugar d-ribose (C5H10O5) of mass 0.727 g was placed in a calorimeter and then ignited in the presence of excess oxygen. The temperature rose by 0.910 K. In a separate experiment in the same calorimeter, the combustion of 0.

the volume of an ideal gas in a container is 2.0 L what will be the volume of the gas if the pressure on the container is doubled while the temperature is reduced from 400 K to 200 K

Which of the Following Will result in increasing temperature of s gas