Molecules involved in a chemical reaction must meet to react. What is this concept called?

Enthalpy

Collision theory

Enthropy

Reaction rate

Precision is defined as how_the measured values are to one another. accurate common reproducible 2 pts D Question 3 An object with a mass of 0.281 kg and density of 452 g/cm measures 37.0 mm in length and 15.2 mm in width.

If you have a volume of 10 mL and a mass of 100 kg, what is the density?

If a sealed syringe is plunged into cold water, in which direction will the syringe piston slide? A. in B. out C. No movement will occur D. The direction cannot be predicted

The stored energy in a battery can BEST be described as: Question 6 options: kinetic nuclear thermal chemical

A sample composed only of atoms having the same atomic number is classified as 1. A compound 2. A solution 3. An element 4. An isomer

A sample of bismuth weighing 0.687 g was converted to bismuth chloride by reacting it first with HNO3, and then with HCI, followed by careful evaporation to dryness. The mass of the bismuth chloride obtained was 1.032 g.

When 1 g of sodium chloride (NaCl) is placed in 100 g of water, a solution results. Once the solution is prepared, water is now considered what part of the solution?

1. How is pressure affected as depth increases? 2. As the sun heats the surface of the oceans, two layers of water result. What separates the layers? 3. How is temperature affected when? (a) the depth increases (b) the latitude increases 4.

Are nails in a jar with water a chemical change

What is the molarity of a solution composed of 4.73 g of potassium iodide (KI) dissolved in enough water to make 0.169 L of solution? Answer in units of M.