What is the mass of 18.8 moles of helium (He) atoms?

0.213 g

4.70 g

37.6 g

75.2 g

Which of the following microscopic soil life forms is also known as a "ring worm"? arthropods bacteria nematodes protozoa

A sample of 0.600 mol of a metal m reacts completely with excess fluorine to form 46.8 g of mf2. how many moles of f are in the sample of mf2 that forms?

How long will it take the Sun to go around the galaxy once? a. 200 million years c. 100 thousand years b. 10 years d. 5 billion years

In a nuclear power station, which step of the process converts energy of other forms into electrical energy that can be used as electricity

A class is given a demonstration of solution chemistry and solubility equilibria. Passage: A 6.57-g sample of NiSO4•6H2O (molar mass 262.84) is dissolved in enough water to make 50.00 mL of a green solution, and 7.

What device changes mechanical energy into electrical energy? Question 4 options: transformer generator copper wire light switch

Reaction rates are affected by how often the particles collide true false

A 25 N and 5 N force pull to the right. Friction is 10 N. If the object is 5 kg, find the net force and acceleration.

What properties of matter are intensive independent of their size

What is the density of an object having a mass of 8.0g and a volume of 25cm3