Which of the following is a physical change? A. corrosion B. explosion C. evaporation D. food spoilage

How long ago did the solar system form? a. 5 million years b. 5 billion years c. 5 trillion years

Two different proteins X and Y are dissolved in aqueous solution at 37 ∘C. The proteins bind in a 1:1 ratio to form XY. A solution that is initially 1.00 mM in each protein is allowed to reach equilibrium. At equilibrium, 0.23 mM of free X and 0.

A sample of NO2 in a 1550 mL metal cylinder at 70.26 kPa has its temperature changed from 480oC to - 237oC while its volume is simultaneously changed by a piston to 5114 mL. What is the final pressure in kPa?

Which questions would be most useful in a dichotomous key to identify these butterflies? Check all that apply.

Explain why 2-bromopropane reacts with sodium iodide in acetone over 104 times faster than bromocyclopropane. hint: examine the transition state for each of the reactions.

Calculate the molality of a 27.0% (by mass) aqueous solution of nitric acid.

What is the percent of carbon-14 remaining after two half-lives?

Determine the name of the compound Li2O

Complete the reactions to show how butanoic acid may be converted to phenyl propyl ketone.

As a sample of the radioactive isotope 131I decays, its half-life (1) decreases (2) increases (3) remains the same