Which of the following pairs of elements belong to the same group

A. H and He

B. Li and Be

C. C and Pb

D. Ga and Ge

In a volumetric analysis experiment, an acidic aqueous solution of methanol (CH3OH) is titrated with a solution of potassium dichromate (K2Cr2O7) according to the following balanced chemical equation: 2K2Cr2O7 (aq) + 8H2SO4 (aq) + 3CH3OH (aq) → 2Cr2

Heat and pressure deep beneath Earths surface can change any rock into A. Chemical rock B. Gemstone C. Metamorphic rock D. Sedimentary rock

What happens to atomic radius size of a cation and why?

The mole in 196.5 g of Zn (NO3) 2

Which element has the fewest valence electrons available for bonding? iodine aluminum carbon nitrogen

Heat is the total potential energy of a substance that can be transferred. TRUE FALSE

How does Earth's rotation axis cause seasons to change?

Which of the following can be considered evidence of a chemical change? (Click the 4 that apply) A. Evaportation B. Production of a new substance C. Production of Bubbles D. Melting E. Color change F. Dissolving G. Freezing H. Heat is released

The decomposition of hi has a rate constant of 1.80 * 10-3 m-1s-1. how much hi remains after 8.50 min if the initial concentration of hi is 4.78 m?

Explain negative and positive acceleration?