If you forget to dry off a bread knife and when you washed it and reddish brown spots appeared on it would that be physical or chemical change

When a 0.1 M H2SO4 solution is added to pulverized blackboard chalk, the following reaction takes place. CaCO3 (s) + H2SO4 (aq) - -> CaSO4 (s) + CO2 (g) + H2O (l) At 25°C, the reaction is spontaneous and has: A. negative ΔG' and positive ΔS' B.

Tracie measured 87.47 mg of cholesterol in 0.03 mL of blood. What is the density of this mixture in g/mL?

How do you overcome depression?

As you move across a row from left to right in the period table, atomic numbers of the elements a. decrease. b. increase. c. double. d. stay the same.

What is the volume of 8.50 moles of hydrogen gas?

Two components combine to create a binary ionic compound. Name one of them

True or false. The synthesis of giant molecules from components of repeating units is polymerization.

Which term names an environmental cost of fossil fuel consumption? A. cheap energy B. increased greenhouse gases C. renewable resource D. low pollution

Slowly heating butter in a pan until it changes from a solid to a liquid is an example of a physical change. True False

Action - reaction forces don't cancel each other. A. True B. False