A particular nuclide has a mass number of 21 and contains 11 neutrons. What element is it? a. hydrogen b. neon c. sodium d. scandium

In order for plants to go through photosynthesis, they must use A. X rays. B. visible light. C. infrared rays. D. ultraviolet light.

a flack that weighs 345.8g is filled with 225 ml of carbon terachloride the weight of the flack and carbon terachloride is found to be 703.55g. from this information calculate the density of the carbon terachloride

How many rods will equal 247 inches

What is the molar mass of K2CO3?

A specific amount of energy is emitted when excited electrons in an atom in a sample of an element return to the ground state.

Which of the following is the best indication that a chemical change has taken place? a. The matter changes color. b. A mixture separates into layers. c. The change is reversible. d. The shape of the substance changes.

This is not lost in a chemical Reaction (4 letter word second letter is A)

Which type of soil holds the least water

Eq-43 which type of fire extinguisher should be onboard a vessel with a permanently installed fuel tank

5. Identify a suitable method that would be used to separate mixture of the follow [b]Water and ethanol c]Table salt dissolved in water d] iodine and potassium Pul the table below