Which of the following is not a physical change?

sublimation

deposition

combustion

evaporation

For an acid what happens to the molecules when it is in a water solution

Which statement describes the relationship of voltage and current?

How many protons, electrons, and neutrons are in 82 Se 34

A nitrous acid buffer solution contains 0.85 M nitrous acid (HNO2) and 0.61 M of its conjugate base (NO2-). If a chemist adds 0.15 mol of hydrobromic acid (HBr), a strong acid, to 0.

What information is necessary to describe motion scientifically? the time an object travels the distance an object travels in a given time the distance and time an object travels the rate and direction an object travels

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