Which of the following is an example of chemical change? A.) stirring butter and sugar together B.) adding food coloring to water C.) burning a candle D.) breaking a rock into smaller pieces

What are the non-living components of an ecosystem? The non-living components of an ecosystem are factors.

The names of the compounds FeS, NaCl, NaOH, and Pb (CN) 2 all end in the suffix a. - ide. b. - ite. c. - ate. d. - ic.

24 g of magnesium is burned in oxygen. The compound formed has a mass of 40g. explain why the mass has gone up

How many moles are in 74 grams of Ca0

NF3 has three F atoms bonded to a central N atom, with one lone electron pair on the N. What is the shape of this molecule? O A. Tetrahedral O B. Trigonal planar O C. Bent O D. Trigonal pyramidal

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?