Why does a closed system mean that nothing could enter or exit

Find volume of 1 mole of helium gas when the pressure is 1.46 atm and the temperature is 270k

Given the unbalanced equation: al + cuso4 - - > al2 (so4) 3 + cu. when properly balanced, the sum of the balancing coefficients is select one: a. 7 b. 6 c. 9 d. 8

How many meters are in 5.26 km

The table shows columns that Brenda uses for her notes on the properties of elements. Her notes state that some elements can react to form basic compounds. Where should Brenda place this property in her table? only in the column for metalloids

How quickly would groundwater flow through a rock

What is natural transmutation?

An electron in a sodium atom gains enough energy to move from the second shell to the third the sodium atom becomes

What is temperature in science, how fast molecules move or how cold or hot something is?

Which describes an object's speed when free falling in a vacuum? The object accelerates until it reaches its terminal velocity. The object falls at a constant speed because only one force acts on it.

If you had 20,000 liters of NO2 how many moles would you have?