What is the density of helium in grams per liter?

What's the frequency of a 2600 cm wave?

A 74 kg zebra is traveling 15 m/s east. What is the zebra's momentum

For practice, the molecular formula for ascorbic acid is C6H8O6, and you used 6 g in this experiment, calculate the molarity of the ascorbic acid. Now calculate the concentration in moles per drop (assume 1 mL = 20 drops)

Vitamin A is a very large organic molecule composed of twenty atoms of carbon, one atom of oxygen and thirty atoms of hydrogen. How many atoms total are in TWO molecules of vitamin A. Select one: 84 68 34 102

Balance the equation with the correct coefficients. SiO2 + HF >SiF4 + H2O

Hydrochloric acid, HCl, reacts with solid NaOH. What are the products of this chemical reaction?

Why are emission spectra referred to as the fingerprints of the elements?

David has a weather balloon that he fills with helium and then releases. As the balloon rises into the atmosphere, the balloon gets bigger and bigger.

Beaux has purchased a synthetic material for a product he is launching. What is most likely a benefit of this material? A) It is biodegradable. B) It can be recycled cheaply. C) It is heavy. D) It can be mass produced.

Which equation represents a neutralization reaction? A) 6HC1O - > 4HCL + 2HCLO3 B) CH4 + 2O2->CO2+2H20 C) Ca (OH) 2+H2SO4->CaSO4+2H2O D) Ba (OH) 2+Cu (NO3) 2->Ba (NO3) 2+Cu (OH) 2