A sample of nitrogen in a glass bulb has a mass of 245 mg what is its mass in kilograms

Which type of measurement is used least often by scientists? Weight Mass Both weight and mass are used equally by scientists Neither weight or mass is used by scientists

Why do covalent bonds not involve the transfer of electrons

Which of the following methods can be used to remove water from a mixture of sand and water? A. Centrifuge B. Filtration C. Floatation D. Magnetism

Which statement regarding the gold foil experiment is FALSE? 1. The α particles were repelled by electrons. 2. It suggested that atoms are mostly empty space. 3. It suggested the nuclear model of the atom. 4.

What is the pOH of a solution with [OH-] = 2.0 10-2? A. 2.00 B. - 1.70 C. 3.01 D. 1.70

What is the number of moles in 2.33 L of H2S gas at STP?

Nitrous oxide (n2o), or laughing gas, is commonly used as an anesthetic in dentistry and surgery. how many moles are present in 8.4 liters of nitrous oxide at stp?

How can an atom be electrically neutral when it contains particles that are charged?

Is boiling water considered physical or chemical bond

Which of the following is the correct scientific notation for 0.000451 g? 4.5 x 10-3 4.5 x 10-5 4.51 x 10-4 45.1 x 10-4