Which statement describes evidence of a chemical reaction?

a. ice melting

b. water boiling

c. lighting a match

d. grape juice freezing

Sea level changes occur at a rate of 10 m per 1,000 years. Regional erosion occurs at a rate of 2 m per 1,000 years. Uplift occurs at a rate of 0.1 m per 1,000 years. Which process is the fastest? Sea level changes regional erosion uplift

If 250.0 ml of a 0.96 m solution of acetic acid (c2h4o2 are diluted to 800.0 ml, what will be the approximate molarity of the final solution? a. 0.19 m strike reset b. 0.24 m strike reset c. 0.30 m strike reset d. 0.77 m strike reset

Which requires more heat to warm from 22 c to 85 c, 50.0 g of water mor 200. g of aluminum metal?

Use the accepted values for the molar masses of zinc and gold to determine the mass of gold needed to have the same number of atoms as 10 g of zinc.

Which of the following tends to form anions when bonding with other elements? A. Li B. Br C. K D. Ca

Which substance is the limiting reactant when 4.0 g of sulfur reacts with 6.0 g of oxygen and 8.0 g of sodium hydroxide according to the following chemical equation: 2 S (s) + 3 O2 (g) + 4 NaOH (aq) → 2 Na2SO4 (aq) + 2 H2O (l) A. O2 (g) B. S (s) C.

If EG = 19 and FG = 12 then EF = ?

Given the following reaction: 4Fe + 302 → 2Fe2O3 How many grams of Fe2O3 will be produced from 24.0 g of Fe and 5.00 g of O2? grams (round to three significant figures)

Which Group 16 element combines with hydrogen to form a compound that has the strongest hydrogen bonding between its molecules? 1. oxygen 2. selenium 3. sulfur 4. tellurium

How many hydrogen atoms are in 2.80 mol of ammonium sulfide?