How many protons are found in the nucleus of a boron 11

Elements in group 1 will (lose or gain) electrons to obtain a noble gas structure. How many electrons will the element gain or lose in order to obtain a noble gas structure? (5,3,7,6,1,2,4)

Which of the following is a compound? options: nitrogen air oxygen water

During the combustion of 5.000 g of octane, C8H18, 239.5 kcal is released. Write a balanced equation for the combustion reaction. Express your answer as a chemical equation with whole number coefficients. Include phases.

How much heat must be removed from 456 g of water at 25.0°c to change it into ice at?

An acid is a substance that increases the concentration of H3O + ions in solution. Look at the reaction below of phenol (C6H5OH) with water: Which reactant acts as an acid by contributing a H + ion to create H3O + in the chemical equation? a.

Problem 5.32 - enhanced - with feedback the rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically μr=0.002. suppose a 180,000 kg locomotive is rolling at 22 m/s on level rails.

What concentration of so32 - is in equilibrium with ag2so3 (s) and 9.50 * 10-3 m ag? the ksp of ag2so3 can be found here?

Groups or families in the periodic table have what in common

Why is the isotope mass multiplied by the isotopes percent abundance?

Rank the following substances in order from most soluble in water to least soluble in water: ethane, C2H6; 2-butanol, C4H9OH; potassium chloride, KCl; and propane, C3H8.