Which of the statements is true about chemical reaction rates

the reaction rates can change

the reaction rates are always constant

the reaction rates cannot increase

the reaction rates cannot decrease

How many grams do 4.8 x 1026 atoms of silicon weigh? Answer in units of g.

What mass of H2SO4 is contained in 26 grams of a 15% solution?

A scientist formulates a hypothesis that is not supported by his/her experimental results. The scientist must then revise his/her hypothesis. a. True b. False

A lab experiment to determine the rate of ATP production and its use in plants is conducted. In the lab, twenty circles cut from plant leaves are placed in a container of water with a light source, which allows photosynthesis to occur.

Which state of matter characterized by having a definite shape and a definite volume?

Which is a non renewable resource that is used to generate electrical energy

How many grams of sulfur (S8S8) must be dissolved in 100.0 g naphthalene (C10H8C10H8) to make a 0.11 mm solution

Mason compare the properties of two compounds magnesium oxide is an ionic compound and hydrogen peroxide is not an ionic compound there for both compounds most likely

Cisplatin is synthesized as follows: K2PtCl4 (aq) + 2NH3 (aq)  Pt (NH3) 2Cl2 (s) + 2KCl (aq) What mass of cisplatin can be made from 100. g of K2PtCl4 and sufficient NH3? What mass of KCl is also produced?

What is the total number of protons in the nucleus of an atom of potassium-42? (1) 15 (3) 39 (2) 19 (4) 42