How many neutrons are in an atom with the atomic number of 15 and an atomic mass number of 34?

? 19

? 15

? 34

The Metal Wire In An Incandescent Lightbulb Glows When The Light Is Switched On And Stops Flowing When It Is Switched Off. This Simple Process Is Which Kind Of Change?

A sample of a compound contains 60gC and 5.05gH. it molar mass is 78.12g/mol what is the compound molecular formula

An enzyme with molecular weight of 310 kDa undergoes a change in shape when the substrate binds. This change can be characterized by ultracentrifugation. In the absence of any ligand, the s20, w = 11.7S, density of solvent is 1g/cm3and viscosity 1.

Elemental phosphorus burns in oxygen with an intensely hot flame, producing a brilliant light and clouds of the oxide product. These properties of the combustion of phosphorus have led to its being used in bombs and incendiary devices for warfare.

Sodium explodes when it contacts water. If I have a compound that contains sodium, will it explode if it is exposed to water? Question 2 options: A. Only if there is a larger amount of sodium than other elements. B.

The Suns ultraviolent Rays can cause skin damage including sunburn and even skin

Peas contain 250 kJ per 100 g. You would use the equivalent of 600 g of peas if you slept for.

A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L. If the temperature changes to 70 ∘C, and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?

Which is a waste product of aerobic respiration? A. water B. energy C. oxygen D. glucose

Match the following: Part A 1. matter with no definite shape or volume 2. matter with no definite shape but with definite volume 3. the process of a solid changing directly to a gas without forming a liquid 4.