28)Many people avoid processed food to eliminate unnecessary ingredients like food dyes and excess sodium from their diets. A
study calculated that every 70.0 g serving of a certain brand of Mac & Cheese contains 260 calories, 3 g of fat, 16 g of
carbohydrates, 9 g of protein, 570 mg of sodium, and 17.6 mg of food dyes. What is the mass percent of sodium in the Mac &
Cheese?
0.8149
12.3%
25.1%
45.6%

The hottest layer of the atmosphere

The corner where a perfume is initally sprayed has:A. Has no concentration of pefume particles.
B. the process of diffusion.
c. a lower concentration of perfume particles the the other corners of the room.
D. a higher concentration of perfume particles the the other corners of the room.

A sample of gas in a balloon has an initial temperature of 31 ∘C and a volume of 1570 L . If the temperature changes to 90 ∘C , and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?

1. A scientific hypothesis can become a theory if ______.A) the entire community accepts it
B) the hypothesis is tested extensively and competing hypothesis are eliminated
C) there are no other competing hypothesis
D) the hypothesis can be tested at least once
2) A preliminary untested explanation that tries to explain how or why things happen in the manner observed is a scientific ________.
A) law
B) theory
C) fact
D) hypothesis

What moderates the temperature on Earth ? A. cities B. deserts C. the oceans D. mountainous areas

In a chemical reaction, ... interact to form ... a. molecules, atoms
b. products, reactants
c. elements, atoms
d. reactants, products