H2o Cl2 NH3 have what in common

Which of the following is a clue of a chemical change? a. balls of wax form when melted wax is poured into ice water b. iron changes color when heated c. gas bubbles form in boiling water d. a gas forms when vinegar and baking soda are mixed?

Consider the balanced equation below. 4NH3 + 302 → 2N2 + 6H20 What is the mole ratio of NH3 to N2? A) 2:4 B) 4:2 C) 4:4 D) 7:2

Though there are many solids taking face-centered cubic unit cell, the number of solids adopting body-centered cubic unit cell decreases significantly and the number of solid adopting primitive cubic unit cell is even smaller.

What is the mass of carbon in 500. g of octane?

Which one of the following solutions will have the greatest concentration of hydroxide ions? a) 0.100 M hydrochloric acid b) 0.100 M magnesium hydroxide c) 0.100 M ammonia d) 0.300 M rubidium hydroxide e) 0.250 M calcium hydroxide

Assuming a constant temperature which sample below would you expect to be at the highest pressure?

What is 16.7 cubic feet expressed in cubic centimeters

3. Using Equation 18-5 and the pKIn value you found, determine the ratio [In-]/[HIn] at the pH in the middle of the range you studied (i. e., pH = 6.0 for bromocresol purple, pH = 7.0 for bromothymol blue, and pH = 7.7 for phenol red).

Suppose you begin with 1.50~g of the hydrate copper (II) sulfate · x-hydrate (CuSO4· x H2O), where x is an integer. After dehydration you find that you are left with 0.96~g of the an-hydrate CuSO4. What is the unknown integer x.

Which elements are found in the lithosphere