Why might a country attempt to hide an outbreak of an infectious Disease? A. For political reasons B. To avoid disruption to trad C. To avoid disruption to travel D. To stop scientists from finding a cure or vaccine

Scientists often deal with numbers that are either very large or very small. For example, the radius of the Sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 * 10-4 millimeters.

What makes an increase in temperature change the reaction rate? O A. It increases the equilibrium constant of the reaction. O B. It decreases the activation energy of the reaction. O C. It prevents the backward reaction from happening. O D.

8Which of the following can be found in the Kuiper Belt? A[Sun] B[Jupiter] C[Comet] D[Pluto]

How does changing the concentration change the ph of a solution

In location B, what can you conclude about the sediments carried in the river?

If A is slowly added to a solution containing 0.0500 M of B and 0.0500 M of C, which solid will precipitate first? The solubility product constant for A2B3 is 2.30*10-8. The solubility product constant for AC4 is 4.10*10-8.

Research three different types of fire extinguisher and explain how these can be used to put out different fires, you must relate this to the fire triangle and the section that is removed

If a mineral has a daughter to parent ration of 3:1 (three daughter atoms for every one parent atom), how many half-lives have passed since the mineral formed?

What is true of the enthalpy value of an intermediate reaction? A. It always has a negative enthalpy value B. It is multiplied by 2 if the intermediate reaction is multiplied by 2 C. It is the same as the total enthalpy of reaction D.

Calculate the percent composition of the compound that forms when 222.6 g N combines completely with 77.4 g 0. calculate to the nearest tenth of a percent.