A pile of marbles weigh 394.80 g. 10 marbles weigh
37.60 g. How many marbles are in the pile?​

How are isotopes of the same chemical element alike? how are they different?

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients