How to determine the number of valence electrons?

An aqueous solution containing 100.0 g of nacl and 100.0 g of cacl2 has a volume of 1.00 l and a density of 1.15 g/ml. the vapor pressure of pure water at 25 ∘c is 23.8 mmhg, and you can assume complete dissociation for both solutes

How many moles of CaCl2 will be produced from 1.4 moles of HCl reacting with calcium hydroxide A. 2.8 moles B. 0.70 moles

Which of the following occurs when a large nucleus is split apart? A) Chemical reaction B) Electrolysis C) Fission D) Fusion

Since no electromagnetic radiation escapes from astronomers locate them by looking for x-rays from gas accelerating toward them

Calculate the formal charges of the atoms in co co2 and co32-

How do you know if the reaction is exothermic or endothermic if both phase are same?

How many elements are in a set whole numbers between 3 and 15

Calculate the percent activity of the radioactive isotope strontium-89 remaining after 5 half-lives.

Describe 2 theories for yawning

When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. the reason for this is?