Which of the following is a characteristic typically not used to classify biomes?

a.

climate

b.

vegetation

c.

temperature

d.

geography

The process of asking questions is known as

Calculate the change in energy requiredto convert 250. g of substance X from a gas at 121°C to a solid at - 49.0°C. Assume X has molar mass = 75.0 g/mol. Also, substance X has the following properties:

What is one result of a chemical change? A. Energy is created. B. A new material is formed. C. Materials change from one state to another. D. Elements are permanently destroyed.

A car takes a sharp turn on a road. Which of the following provides the centripetal force on the car?

Write a generic Lewis structure for the halogens. Draw the Lewis dot structure for X

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass

Why openness is important to the progress of science?

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.

If you go into the lab and dissolve 2.11 g of magnesium chloride in enough water to make 1500 ml of solution, what is the molarity of the resulting solution?