Which of the following is evidence for a chemical change? A) a substance melts B) an element easily breaks C) an element can be cut into tiny pieces D) an insoluble substance forms after combining two solutions

Calculate the mass percent of hydrogen in methyl acetate

What is the formula that this ionic compounds could form sr2+p3-o2-

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm