How many milliliters of 5.0M K2Cr2O7 solution must be diluted to prepare 250.0 mL of 0.37 M solution

Is carbon or chlorine more reactive? Why?

A 19.79g sample of hydrated CoCl² weighs 10.77g after being heated. Determine the formula of the compound. Show all of your work and write your final answer below. (Hint: Start by finding the moles of CoCl² and the moles oh H²O)

A certain element x has four isotopes. 94.93% of x has a mass of 31.97207 amu. 0.7640% of x has a mass of 32.97146 amu. 4.290% of x has a mass of 33.96786 amu. 1.600*10-2% of x has a mass of 35.96709 amu.

An unknown substance has a mass of 15.5 g. When the substance absorbs 1.395*102 J of heat, the temperature of the substance is raised from 25.0 ∘C to 45.0 ∘C. What is the most likely identity of the substance?

What is an atom that donates an electron called. A.) a cation, B.) a proion, C.) an anion, D.) an isomer

It is thought that organelles of eukaryotic organisms, such as mitochondria and chloroplasts (in plant cells) came from

How does temperature affect molecules

The color of Benedictâs solution is blue. What color does it change to in high sugar concentration?

What functional groups of the emulsifying agent provide the hydrophilic character? Do these groups affect the pH?

Which element has atoms that can form single, double, and triplecovalent bonds with other atoms of the same element? (1) hydrogen (3) fluorine (2) oxygen (4) carbon