a powder has a mass of 40.0g when the powder is added to 30.0ml of water the total volume is 45.0ml what is the denaity of the powder

What is the usual charge on an ion formed from an atom that originally had five valence electrons? a. 0 b. 3 c. - 3 d. 5

The smallest volume from among the following is: A. 0.012 L. B. 18 cm3. C. 1.6 x 10-2 L D. 25 mL.

Structure of hydrochloric acid

How many calories are released when 100.00 g of steam condenses?

A sample of glucose, CeH120e, contains 1.03 x 1025 atoms of carbon. How many atoms of hydrogen does it contain?

How many molecules are in 4.50 moles of water

N aqueous solution of sodium hydroxide is standardized by titration with a 0.154 m solution of hydrochloric acid. if 17.5 ml of base are required to neutralize 17.6 ml of the acid, what is the molarity of the sodium hydroxide solution?

Consider the positions of barium (Ba), sulfur (S), silicon (Si), and calcium (Ca) on the periodic table. The atoms of which element require the least amount of energy to give up an electron when forming chemical bonds?

what is way to find the numbers of liters in 8 kilometers? (A.) Add 5,000 and 3, because you are adding 3 kiloliters to 5,000 liters. (B.) Multiply 8 by 3,000, because each kiloliter has 3,000 liters. (C.

How much energy must be added to 2 mol H2O (g) to cause it to decompose into H2 and 02? KJ