How many atoms of helium are in a balloon, which contains 0.47 moles of the gas?

The periodic trend for electronegativity is similar to what other trend? A. The trend for shielding. B. The trend for ionic radii C. The trend for atomic radii D. The trend for first ionization energy

Biotechnology can be both useful and potentially destructive. Choose one example of biotechnology and identify whether it has had a positive or negative effect on society. Explain your answer.

What is the maening of separation methods

What is a mutual attraction between the nuclei and electrons in two different atoms called? A) a chemical bond B) a compound C) a cation D) a anion

If a patient took one pill (0.250 g each) of an antibiotic every 6 hours for two weeks, how many total milligrams of antibiotic did he take for to week?

What would a 1:1 liquid binary mixture of Cyclohexane and Toluene look like? How would the molecules associate with one another?

A sample of argon gas is at a pressure of 1.725x10^4 kPa and a temperature of 24°C in a rigid 20 L tank. How many moles of argon does this tank contain? (show your work)

summarize what you read on the two articles by identifying the advantages and disadvantages of using plastics

What happens chemically when quick lime is added to water?

What was the crop that led to the success of Jamestown? A) cotton B) sugar cane C) tobacco D) indigo