A walkman uses a current of 2.0 A and has an internal resistance of 3.0 Ω, how many 1.5V batteries are required?

The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Rhenium-185 has in its nucleus a. 75 protons, 75 neutrons b. 75 protons, 130 neutrons c. 130 protons, 75 neutrons d. 75 protons, 110 neutrons e. not enough information

Which solution has the highest vapor pressure? a.) 20.0 g of gluclose (C6H12O6) in 100.0 mL of water b.) 20.0 g of sucrose (C12H22O11) in 100.0 mL of water c.) 10.0 g of potassium acetate (KC2H3O2) in 100 mL of water

When 10.51 g CaCO3 reacts with excess hydrochloric acid, as below, 3.29 g of CO2 is produced. CaCO3 (s) + HCl (aq) → CO2 (g) + CaCl2 (aq) + H2O (l) What is the percent yield of CO2?

What determines the strength of a solute as an electrolyte?

What is the main cause of earthquakes?

Which solution contains the largest number of moles of chloride ions? a. 30.00 ml of 0.100m cacl2 b. 10.0 ml of 0.500m bacl2 c. 25.00 ml of 0.400m kcl d. 4.00 ml of 1.000m nacl e. 7.50 ml of 0.500m fecl3?

What is the chemical formula of titanium (II)

Not related to any subject but how do you tell someone you like them?

An aspirin tablet contains 75.0 mg of aspirin, which has the molecular formula, c9h8o4.

What are elements in the same row or period called