12 Which gas is monatomic at room temperature and

pressure?

(1) nitrogen

(2) neon

(3) fluorine

(4) chlorine

What diseases are spread in warm temperatures?

What particles are used for artificial transmutations? A. beta particles and gamma rays B. protons, alpha particles, and beta particles C. protons, neutrons, and alpha particles

If this wave happened over a period of 60 seconds what is the calculated frequency in hertz A) 5.3 Hz B) 2.5 Hz C) 3 Hz D) Cannot be determined from the information provided

Which of these is a physical property? A. Malleable B. Easy to digest C. Does not burn D. Becomes moldy quickly

Enter a molecular equation for the gas-evolution reaction that occurs when aqueous hydroiodic acid and aqueous potassium sulfite are mixed.

Using the periodic table, determine the number of neutrons in a carbon.

Sailin Steve likes to test the buoyancy of different objects. He threw a spherical object into a fluid that has a greater density than the object does. He also threw a square object into the fluid that has a greater density than the fluid.

The sun is directly overhead at the equator on what day of the year? A. Zenith B. Solstice C. Equinox D. Ecliptic Isn't it the Solstice?

In the SI system of units, the mole is one of seven base units. It is frequently used in chemical calculations. However, a mole of something is just a particular quantity of it.

A student used a DCP solution (standardized to 9.98x10-4M) to analyze a sample of extract from 2.50g of solid food. The titration required 22.49mL of DCP. 87.00% of all the ascorbic acid in the food was collected in the extract.