Which of the following elements would be considered a nonmetal?

fluorine (#9)

silicon (#14)

cobalt (#27)

sodium (#11)

What is oxidized and what is reduced in this reaction? N 2 H 4 (l) + 2H 2 O 2 (l) N 2 (g) + 4H 2 O (g) Nis reduced and H is oxidized. Nis reduced and O is oxidized is oxidized and O is reduced oxidized and His reduced.

What is hard and symmetrical in shape, forms from a solution

What particle is needed to complete the following equation 14 7 n + 14 6 c + 1 1 h

How many moles of aluminum are needed to make 9 moles of molecular hydrogen? given the reaction: 2 al + 6 hcl → 2 alcl3 + 3h2 6 moles 4 moles 3 moles 2 moles none of the above?

Explain why noble gases usually do not form bonds with other atoms?

How much heat is needed to raise the temperature of 75 g of a substance by 15 C when the specific heat is 0.92 J/g-C?

A nitric acid solution flows at a constant rate of 5L/min into a large tank that initially held 200L of a 0.5% nitric acid solution. The solution inside the tank is kept well stirred and flows out of the tank at a rate of 10L/min.

How many molecules are in 237g (about a cup of water)

3. A compound was analyzed and found to contain 9.8 g of nitrogen, 0.70 g of hydrogen, and 33.6 g of oxygen. What is the empirical formula of the compound?

A 126-gram sample of titanium metal is heated from 20.0°C to 45.4°C while absorbing 1.68 kJ of heat. What is the specific heat of titanium?