If a system requires 150 J of input work and produces 123 J of output work, what's its efficiency? A. 72% B. 122% C. 82% D. 92%

A liquid that occupies a volume of 0.820 L has a mass of 2.56 kg. What is the density of this liquid in kg/L?

24g copper is submerged in water in a graduated cylinder, and the total volume increases by 2.7 mL. who's is the density of copper?

Which of the following is not a base a) orange b) shampoo c) toothpaste c) bleach

How do you interpret a chromatogram for what mixtures contain?

The size of the chosen symbols on a graph may be used to indicate the:

The data below were collected for the following reaction at 500 ∘C: CH3CN (g) →CH3NC (g) Time (h) [CH3CN] (M) 0.0 1.000 5.0 0.794 10.0 0.631 15.0 0.501 20.0 0.398 25.0 0.

How do i convert 3.00 moles H2 to molecules?

How can you use the chemical formulas for sucrose (C6H, 20,) and rust (Fe, O,) to classity them ionic or molecular compounds?

What is true of energy as is passes through an ecosystem? a. All of the energy in an organism is used by the animal that eats it. b. Any stored energy in an organism is used by the animal that eats it. c.

Which can associate a suspect and the firing of a gun? (its not b) A) markings on the gun's exterior B) markings on the casing C) markings on the bullet D) powder residues