At what temperature in the Kelvin scale does water boil? Explain what happen when we supply heat energy to water till it changes its state. What is this great energy called?

Is potassium a metal, nonmetal, or metalloid?

Which element has an equal number of electron pairs and of unpaired electrons within orbitals of principal quantum number 2?

What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by weight? a. so b. so3 c. so2 d. s6o4

Aluminum metal and chlorine gas react to from aluminum chloride 2Al (s) + 3Cl2 (g) - -> Al2Cl6 (s) How many grams of Al2Cl6 can be produced from the reaction of 2.67 mol aluminum and 3.26 mol Cl2?

Can a particle be a molecule? Explain ...

Based on this information what is the most likely reason for refrigerating most foods reduce the rate at which they spoil

What is the activity of a 54.7 μCi sample of carbon-14 in becquerels?

2H2 + O2 - > 2H20 What is the mass of water that is produced from 4.00 moles of oxygen gas reacting with hydrogen gas?

A seguir são apresentadas algumas afirmações. Classifique-as como verdadeiras ou falsas. No caso de afirmações falsas, reescreva-as, corrigindo o que for necessário.

If a metal ore contains 12.4% pure metal, how many pounds of pure metal can be obtained from 55 pounds of metal ore?