All the following are signs of a chemical reaction, except

A. a change in color or odor.

B. a release of gas.

C. a change of state.

D. a change in energy.

Which chemical in the atmosphere of Titan (a moon of Saturn) plays the same role that water plays on the Earth by producing "rain," "snow," and "ice" at the temperature encountered on Titan?

Write a lewis structure for the co2-3 ion. how many equivalent resonance structures can be drawn?

How is combined gas law modified to form the ideal gas law

Convert the following to Fahrenheit 10 Celsius 30 Celsius 40 Celsius 37 Celsius 0 Celsius

Given:A (g) + 3B (g) ⇋ C (g) + 2D (g) 1.0 mole of A and 1.0 mole of B are placed in a 5.0-liter container. After equilibrium has been established, 0.50 mole of D is present in the container. Calculate the equilibrium constant, Kc, for the reaction.

A fictitious element X is composed of 15.0% of the isotope X-51, 15.0% of the isotope X-52, and 70.0% of the isotope X-53. Estimate the atomic mass of element C

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