The molar mass of magnesium nitrate, Mg (NO3) 2 is what?

Which process is the primary source for energy used by living organisms on Earth? A) Fusion in the Sun. B) Fission in the Sun. C) Combustion in the Sun. D) Disambiguation in the Sun.

Describe the four main spheres of Earth. 1. lithosphere: 2. hydrosphere: 3. atmosphere: 4. biosphere:

What is the easiest way to find the charge of an element using the periodic table?!

What type og cell is mitochandrion found in

The bond between which two atoms is most polar? (1) Br and Cl (3) I and Cl (2) Br and F (4) I and F

A 33.69 g sample of a substance is initially at 29.4 °c. after absorbing 1623 j of heat, the temperature of the substance is 110.8 °c. what is the specific heat (sh) of the substance?

Element X and element Y have a difference in electronegativity of 1:2 will the bond XY be covalent or ionic

What is the empirical formula

What is the phase of matter that has no fixed volume and no fixed shape? Solid Gas Liquid Frozen

Which of the following determines the strength of the force and gravity between two objects? choose all that apply A) the speeds of the objects B) the masses of the objects C) the distance between the objects D) the volume of the objects