Cience, Life Science

Question 1

Which of the following is one of the four main classes of biochemical compounds?

fats

sugars

O DNA

O All of these answers are correct

O carbohydrates

Question 1/5

solid yellow powdery dull poor conductor The list of properties describes the element sulfur. Classify sulfur. A) metal B) metalloid C) nonmetal D) semi-metal

Why are resources limited

Before a chemist can combine a solution with other liquids in a labratory, the temperature of the solution must be between 39C and 52C. The chemist places the solution in a warmer that raises the temperature 6.5c per hour.

an element p has atomic number 13 while q has the atomic 16 ... write down electric configuration of p and q

Concerns over a global dependence on fossil fuels include environmental, economic, and social consequences.

Given the propane molecule C3H8 (g) ! a) What is the balanced equation for the combustion of propane in O2? (20 pts.) b) What is the standard enthalpy change ΔH0 for the reaction at 25°C? (20 pts.

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.

Which has more inertia: a kilogram of cotton balls or a kilogram of gold?

Democritus who lived in greece during the fourth century b. c suggested that matter is made up of tiny particles that cannot be divided. what did he called them

What is the root mean square of carbon iv oxide at 27°C?