Name the parts of an atom

An isotope of yttrium has 39 protons and 59 neutrons. what is the atomic mass of that isotope?

A laboratory animal exercised on a treadmill raises a 200 g mass 1.55 m, and at the same time loses 5.0 J energy as heat. Assume the animal is a closed system. How much does its internal energy change?

What is the correct form of the conversion factor needed to convert the number of moles of o2 to the number of moles of fe2o3 produced?

How many moles of chlorine are in 100g chlorine (Cl) ? A) 0.355 B) 100 C) 64.6 D) 2.82

What happens as you increase the temperature of a reaction? A) More collisions occur and the time required for the reaction increases. B) Fewer collisions occur and the time required for the reaction decreases.

What two ions are central to the arrhenius definitions of acids and bases?

Question 1 A process in which suthetances chemically rearrange to form new substances o Molecule Energy o Organism O Chemical reaction O Matter O Cellular respiration

What are the uses of evaporative salts?

Which of the following are elements? O2 Ca KF B

Which of the characteristics below best describes organic compounds