At STP, 4 liters of O2 contains the same total number of molecules as

(1) 1 L of NH3 (3) 8 L of He

(2) 2 L of Cl2 (4) 4 L of CO2

When did aristarchus of samos propose his heliocentric model?

The reaction of aluminum with bromine is shown here. The equation for the reaction is 2 Al (s) + 3 Br2 (ℓ) n Al2Br6 (s) 1. What are the stoichiometric coefficients in this equation? (a) 1, 3, 4 (b) 2, 3, 1 (c) 1, 6, 8 (d) 1, 1, 1

A negatively charged subatomic particle that occupies orbitals around an atomic nucleus

A microscope containing two or more lenses is an

Hemos preparado la siguiente disolución 40 g de sal en 250 g de agua. Escribe: A - masa de soluto B - masa de disolvente C - masa de disolución D-Calcula el tanto por ciento en peso de soluto

Who is the first scientist that discovered DNA?

In a certain city, electricity costs $0.16 per kW⋅h. What is the annual cost for electricity to power a lamppost for 7.00 h per day with a 100.

What is mass number?

How does the written lewis structure for potassium chloride differ from that of hydrogen chloride?

Which blood protein level increases in the case of primary liver cancer?