Which element is present in all organic

compounds?

(1) nitrogen

(2) oxygen

(3) carbon

(4) sulfur

No two different elements will have the atomic number.-

Given the following reaction: 2 OF2 + 2 S → SO2 + SF4 + 319.5 kJ Is this endothermic or exothermic? Draw the energy pathway:

Eddie has a container of water. The water in the container has a mass of 25 grams. He places the container in the freezer and the water freezes. Which of the following is true?

If the ph of a 1.00-in. rainfall over 1600 miles2 is 3.60, how many kilograms of sulfuric acid, h2so4, are present, assuming that it is the only acid contributing to the ph? for sulfuric acid, ka1 is very large and ka2 is 0.012.

A gas of 19 mL at a pressure of 740 mmHg can be expected to change its pressure when its volume changes to 30. mL. Express its new pressure in units of atmospheres.

c. When we heat water up by the Bunsen burner, what temperature is the boiling water? After 10 minutes

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?