Question 8

10 pts

Choose all of the chemical changes:

(There are FIVE)

boil

burn

dissolve

cut

decompose

rust

tarnish

a break

bake

What was the impact of the british clean air act of 1956 Limited the burning of soft coal Creating agencies to monitor air pollution Set clean-air standards Provided money for air pollution research

Why would gene therapy fail to cure illnesses caused by bacteria

Which of the following is the correct isotope notation for the element above? a. b. c. d. user: how many neutrons are in an atom of carbon with a mass number of 14? a. 6 b. 7 c. 8 d. 14

A compound contains sulfur, oxygen, and chlorine. Analysis shows that it contains by mass 26.95% sulfur and 59.61% chlorine. What is the simplest formula for this compound?

The atomic mass of an element is A. the sum of the protons and neutrons in one atom of the element. B. twice the number of protons in one atom of the element. C. a ratio based on the mass of a carbon-12 atom. D.

What is an example of making a qualified observation

With respect to composition, how is the compound made from hydrogen and oxygen different from mixtures of these two elements?

How should scientist respond when new evidence that challenges current is presented?

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium pressure of H2. D2 (g) + H2 (g) ⇌ 2 HD (g) Kp = 1.80 P (D2) eq = 1.1 * 10-3 atm P (HD) eq = 2.7 * 10-3 atm

Find δe for the change in state of 1.0 molh2o (l) at 79 ∘c to h2o (g) at 116 ∘c. the heat capacity of h2o (l) = 75.3 j/molk, heat capacity of h2o (g) = 25.0 j/molk, and the heat of vaporization of h2o is 40.7*103j/mol at 100 ∘c.