Name two elements that have properties similar to those of beryllium, Be, and have average atomic masses higher than 130

Why is ethanol a liquid at room temperature but ethane is a gas?

Which of the following is not correctly paired with its dominant type of intermolecular forces? 1. SiH4, instantaneous dipoles 2. C6H6 (benzene), instantaneous dipoles 3. NH3, hydrogen bonding 4. HBr, hydrogen bonding 5. CaO, ionic forces

Maple syrup has a density of 1.325 g/ml, and 100.00 g of maple syrup contains 67 mg of calcium in the form of ca2 + ions. what is the molarity of calcium in maple syrup?

15.630 g milk chocolate bar ks found to contain 9.815g of sugar. how many milligrams of sugar does the bar contain?

Concrete a mixture or pure substance?

A. A rapid cooking method that uses high heat from a source located above the food.

What is the number of copper atoms in 1naira coin which weighs 7.39g assuming the material of which the coil is made is 86% copper Na=n/n number of moles/n

Which of the following statements are consistent with Rutherford's nuclear theory as it was originally stated? (A) The volume of an atom is mostly empty space. (B) The nucleus of an atom is small compared to the size of the atom.

Which has a larger atom calcium or barium?

When a spring is compressed, the energy changes from kinetic to potential which best describes this change?