What is the atomic number for magnesium

The flame in a torch used to cut metal is produced by burning acetylene (C2H2) in pure oxygen. Assuming the combustion of 1 mole of acetylene releases 1251 kJ of heat, what mass of acetylene is needed to cut through a piece of steel if the process

A solid with a density of 3.57g/mL and mass of 19.5g is added to a graduated cylinder that contain 23.2mL of water. What is the volume of the liquid once the solid is dropped in the cylinder?

a neutral atom posseses an atomic number of 15 and an atomic mass or 31. three electrons are gained. what is the result of this conversion?

When is potential energy transformed into kinetic energy? A. when is an object at rest is lifted to a higher elevation. B. when an object at rest remains at rest. C. when an object in motion is stopped and put at rest. D.

The acid-dissociation constant of The acid-dissociation constant of hydrocyanic acid (HCN) at 25.0°C is 49x 10-10. You have an aqueous solution of 0.080 M sodium cyanide (NaCN). What type of salt is this? circle one acidic basic neutral D) 8.

Which oxygen pachages materials and distributed them throughout the cell

How many atoms in 3 mol zn

Isotopes: are atoms of different elements which have the same mass are atoms of the same element with equal numbers of neutrons are atoms of the same element with different numbers of neutrons are atoms of the same element with equal numbers of

What would happen to the volume of a sample of gas if the temperature was decreased at the same time the pressure was increased?

How do the compounds that cause acid rain spread from their source?