How much heat will be released when 10.0 g of hydrogen peroxide decomposes according to the following reaction: 2H2O2 (l) 2H2O (l) + O2 (g) ΔH = - 190 kJ

A. 26 kJ

B. 22 kJ

C. 28 kJ

D. 24 kJ

Which step of the scientific method involves obtaining information through the senses? A. analyzing data B. drawing conclusions C. making observations D. revising a hypothesis

5.00 Kg carbon dioxide to moles?

Which of the following is an example of chemical energy being released or stored? A. The wind blows a kite through the sky. B. The water in a river moves small rocks and sticks. C. A coal power plant releases energy when coal burns. D.

The smallest identifiable unit of a compound?

How many moles of neon (Ne) gas have a volume of 2.2 L and a pressure of 0.83 atm at 283 K? (The universal gas constant is 0.0821 L. atm/mol. K.) O A. 13 mol O B. 0.11 mol O C. 42 mol O D. 0.079 mol

Which of the following is a mixture A aluminum B BaSO3 C Milk D table salt

Which of the following quantum number combinations is not allowed in an atom? A. n = 2, l = 1, mr = - 1 B. n = 1, l = 1, m = 0 C. n = 8, l = 5, m = - 4 D. n = 6, l = 3, m = 2

13. Adding thermal energy to a gas at constant pressure will cause

A 3 ml volume of a solution containing an unknown concentration of hcl is added to 7 ml of water. it is then determined that the concentration of the hcl in the diluted solution is 630 mm. what was the concentration of hcl in the original solution?

How do you find the ph of water