Witch of these minerals are metal?

lead

sulfur

halite

gypsm

A compound contains 75% carbon and 25% hydrogen by mass. What is the empirical formula for this compound? CH C4H CH4 C2H8

The concentration of a biomolecule inside a rod‑shaped prokaryotic cell is 0.0035 M. Calculate the number of molecules inside the cell, which is 4.2 μm long and 1.3 μm in diameter

Is putting a magnesium strip in fire chemical or physical change?

What is the body's first line of defense against bacteria and viruses? saliva, mucus, and hairs antibodies lymphocytes lymph nodes

Sequence the first group of elements in order of increasing ionization energy

How many nitrogen atoms are in 2.79 mo. of NH3

What is the chemical formula for polysaccharide?

What is the empirical formula of a compound composed of 32.9g of potassium and 6.73 g of oxygen

Glucose is not made from which of the following

Rank the temperatures from the highest to the lowest. 133F 351K 25C 273K 146C 58F 95F