Which types of matter are made of atoms

How many neutrons does element X have if its atomic number is 23 and its mass number is 90?

What does a calorimeter directly measure? change in temperature kinetic energy specific heat radiation

The human body uses chemical energy in food to produce other forms of energy. What are the other forms of energy?

What is the acceleration of a golf ball that is accelerated uniformly from rest to 55m/s forward in 0.00045 s?

An astronaut is floating happily outside her spaceship, which is orbiting the earth at a distance above the earth's surface equal to 1 earth radius. the astronaut's weight is

The chemical combination of two or more different atoms in fixed amounts is called a (n) element. compound. orbit. mixture.

Use each of the following terms in a separate sentence. 1. Thermal energy 2. First law of thermodynamics 3. Temperature 4. Specific heat

Describe how to prepare a 10.0% w/v solution of salt in water in a 100 mL volumetric flask

what is the mass of an object that is moving at an acceleration of 25 m/s squared with a force of 20 N

A janitor comes across a spilled substance on the floor of a highschool chemistry lab. he wants to make sure that the liquid is neutral before cleaning it up. what would be safest to add to the puddle? a. pour on a base b. pour on a buffer c.