3. How many moles in 28 grams of CO2?

24g of magnesium were burned in oxygen. The compound formed had mass of 40 g. Explain why the mass has gone up

Why does an ionic compound conduct an electric current when the compound is melted but not when it is in the solid state?

An element's atomic number is 40. How many electrons would an atom of this element have? An atom of element A has 111 protons.

In chemical reactions, the substances present at the start of the reaction are called, and the substances produced are called

Skiers often wear sunglasses while they are skiing A) radiates Light B) Absorbs Light C) Conducts Light D) Reflects Light

Identify the solvent and solute in vinegar, a dilute solution of acetic acid.

Calculate the volume occupied by 1.76 mol of gas at a pressure of 2.85 atm and a temperature of 355k

How does chemistry affect cancer

The wavelength of light that has a frenquency of 1.20x10^13s^-1

149.3 g of H2O at 95 ◦C is poured over 412 g Fe at 5 ◦C in an insulated vessel. What is the final temperature? The specific heat of H2O is 4.184 J / g· ◦C, the specific heat of Fe is 0.444 J/g · ◦C. Answer in units of ◦C.