The force of causes a falling object to accelerate at 9.8 m/s/s. Question 3 options: tension gravity mass velocity

gravity

Explanation:

Gravity is the reason why objects fall in the first place, while mass is how much matter there is in an object and the velocity is the rate of change when moving the object.

hloride, what is the mass of calcium in

explanation:

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.