Which of the following is an example of conservation of mass?

A. mass before = 3g mass after = 3g

B. mass before = 4g mass after = 3g

C. mass before = 6g mass after = 12g

Which chemical, originally produced from the ashes of plants, is essential for making soap

How is color related to wavelength? Question options: Color and wavelength are not related. Each color has a different wavelength allowing the eye to see it. Purple has the longest wavelength and highest frequency.

Complete and balance the molecular equation for the reaction of aqueous sodium carbonate, Na 2 CO 3, and aqueous nickel (II) chloride, NiCl 2. Include physical states.

Which of the following has six electrons in its valence shell? oxygen nitrogen sodium neon

How many liters of NH 3 are needed to react completely with 30.0 L of NO (at STP) ?

Which terms identify types of chemical reactions? (1) decomposition and : sublimation (2) decomposition and synthesis (3) deposition and sublimation (4) deposition and synthesis

What element behaves MOST like magnesium (Mg) ? A) S B) Si C) Sn D) Sr

It was determined through analysis that a compound, sodium carbonate with a molar mass of 263 g/mol contained 68.4% water. determine the toilet number of water molecules in this hydrate

Which 1.0 M solution has the lowest pH?

If the heat of fusion of water is 3.4 * 102 j/g, the amount of heat energy required to change 15.0 grams of ice at 0°c to 15.0 grams of water at 0°c is