How much energy is required to heat 250 grams of water from 20.0°C to 80.0°C? The heat capacity of water is 4.186 J/g°C

Q=mc∆T

If acceleration remains the same, but mass is increased, what happens to the force?

A drinking glass has a mass of 268.5 8. A 162 mL sample of milk is added to the glass. The mass of the glass with the milk is found to be 436.2 8. What is the density of the milk? Show your work to justify your answer.

Which reaction follows the laws of conservation of matter

Which of the following is an example of a physical change? A) grinding coffee beans B) baking a cake C) converting water to hydrogen and oxygen D) digesting a cheeseburger E) burning coal

N2 (g) + 202 (g) + 16.2 kcal → 2NO2 (g) Is it endothermic or exothermic?

Which is the MOST accurate description about how the different types of feedback mechanisms work

Which of the following equations violates the law of conservation of mass? A) 2Al + 6HCl yields 2AlCl3 + 3H2 B) Na2C2O4 + Pb (NO3) 2 yields PbC2O4 + 2NaNO3 C) AgNO3 + LiCl yields AgCl + LiNO3 D) 3Ca + 2Cr (NO3) 3 yields 3Ca (NO3) 3 + 2Cr

Which of the following is a true statement about energy? a. energy can be created and destroyed. b. energy is never created nor destroyed. c. energy is easily created, but cannot be destroyed. d. energy cannot be converted from one form to another.

What does a reaction rate tell you

Which phrase provides the best definition of mass movement