What is the percent by mass of hydrogen in aspirin (c9h8o4) ?

Why did a drop of water need to be added in order to initiate the reaction? a. because the water is needed to wet the chlorine gas so the reaction could occur b. because the water is needed to remove a coating on the surface of the metal c.

What is the mass of the helium nucleus?

When a ion in group 2 forms a ion the ion will most likely have a charge of

A sample of ideal gas is in a sealed container. The pressure of the gas is 505torr, and the temperature is 43 degree celsius.

A student has a piece of aluminum metal. Which is the most reasonable assumption the student could make about the metal?

What is the result of multiplying (2.5 * 1010) * (3.5 * 10-7) ? Use the correct number of significant digits.

What is 0.002353 to two significant figures

10. Is the identity of an element determined by its mass number or atomic number? By omak

Nitric acid, hno3, dissociates in water to form nitrate ions and hydronium ions. what change in hybridization of the nitrogen atom occurs in this dissociation

Which is classified as a salt ammonia or sodium chloride?