Chemical reactions can be detected by changes in:

a. temperature

b. color

c. overall mass of the products compared to the mass of the reactants

d. density of the products compared to the reactants

What is the difference between an onion cell and the cheek cell

How do plants respiratory system differ form animal respiratory systems

Benzene contains only carbon and hydrogen and has a molar mass of 78.1 g/mol. Analysis shows the compound to be 7.44% hydrogen by mass. Find the empirical and molecular Formula of benzene.

a gas has a pressure of 1.5 atm, and occupies a volume of 16 L. what will be the new pressure if the volume decreases to 10 L

When 3-methyl-3-pentanol is treated with chromic acid, Group of answer choices a. the color changes from orange to green. b. the orange color remains unchanged. c. the purple color remains unchanged. d. the color changes from orange to blue. e.

A hot meal plate at 150 has been placed in air at room temperature. Which event would most likely take place over the next few minutes

What is the molarity of solution that contains 5.80 grams of nickel nitrate, ni (no3) 2 in 500. ml?

Hydrogen has three isotopes with mass numbers of 1, 2, and 3 and has an average atomic mass of 1.00794 amu. This information indicates that 1. equal numbers of each isotope are present 2. more isotopes have an atomic mass of 2 or 3 than of 1 3.

Describe the process of how visible light is produced

Which of the following contains both ionic and covalent bonding? CH4 NaCl NH4Cl N2O4 If the formula for a compound is represented by X2Y3 and the charge on the Y ion is - 2, what is the charge in the X ion? +1 +2 +3 +4