Figure 2 H₂O2 (1) - ---> H₂O₂ (g) H₂O₂(aq) -- ---> H₂O (1) + O2 (g) Which of the following statements BEST explain which figure is a model of a chemical change? Figure 2, because there are 3 states of matter present. Figure 1, because H₂O2 changes state of matter. Figure 2, because new substances are produced. Figure 1, because H₂O2 created a product. Figure 1

The yield of a chemical reaction is defined as the ratio (expressed as a percentage) of usable output to the amount of raw material input. Suppose the yield of a chemical reaction depends on the length of time the process is run and the temperature at which the process is run. The yield can be expressed as follows: Yield 5 90.79 2 1.095x1 2 1.045x2 2 2.7812 1 2 2.524x2 2 2 0.775x1x2Here x1 5 (Temperature 2 125)y10 and x2 5 (Time 2 300)y30, where temperature is measured in degrees Fahrenheit, and time is measured in seconds. Use a data table to find the temperature and time settings that maximize the yield of this process.

Classify each chemical reaction.

(b) Zn(NO3)2(aq) + 2 N2OH(aq) → Zn(OH)2(s) + 2 NaNO3(aq) Write the complete ionic equation. (Include states-of-matter under the given conditions in your answer. Use the lowest possible whole number coefficients.) chemPad О Help Greek List the spectator ions. (Include states-of-matter under the given conditions in your answer. Separate substances in a list with a comma. Use the lowest possible coefficients.) chemPad О Help X.x" →=- Greek Write the net ionic equation. (Include states-of-matter under the given conditions in your answer. Use the lowest possible whole number coefficients.) chemPad О Help Greek Zu2+ Zu+2 Classify the type of reaction given for (b). (Select all that apply.) a combination reaction na combustion reaction O a decomposition reaction V a metathesis reaction V a precipitation reaction

Classify each chemical reaction: Reaction PbCl₂ (aq) + FeSO₂ (aq) FeCl₂ (aq) + PbSO4 (s) Na₂ CO₂ (s)→ Na₂O (s) + CO₂ (g) Cl₂ (g) + 2KI (aq)→ 2KCl(aq) + 1₂ (s) Туре choose one choose one choose one X Ś

[References] nelling salts," which are used to revive someone who has fainted, typically contain ammonium carbonate, (NH4)2 CO3 . Ammon. ponate decomposes readily to form ammonia, carbon dioxide, and water. The strong odor of the ammonia usually restores conscio person who has fainted. The unbalanced equation is (NH4)2 CO3(s) → NH3(9) + CO2(g) + H2O(g) alculate the mass of ammonia gas that is produced if 2.40 g of ammonium carbonate decomposes completely. g NH3 Submit Answer Try Another Version 1 item attempt remaining

What is true for this chemical reaction: CO₂(g) + 4H₂(g) = CH₂(g) + 2H₂O(g)? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a AHxn>0; ASrxn > 0 b C d AHrxn 0 AHrxn < 0; ASrxn < 0 AHxn 0; ASxn < 0

What is the easiest process to get to the result?

Soda ash (sodium carbonate) is widely used in the manufacture of glass.  Prior to the environmental movement much of it was produced by the following reaction.   CaCO3 + 2 NaCl → Na2CO3 + CaCl2   Unfortunately, the byproduct calcium chloride is of little use and was dumped into rivers, creating a pollution problem.  As a result of the environmental movement, all of these plants closed.  Assume that 125g of calcium carbonate (100.09 g/mol) and 125 g of sodium chloride (58.44 g/mol) are allowed to react.   Determine how many grams of useful sodium carbonate (105.99 g/mol) will be produced.  How many grams of useless calcium chloride (110.98 g/mol) will be produced?  You should also determine how many grams of excess reactants are left (indicate which one is the limiting reactant)

Write a balanced chemical reaction: Ammonia reacts with oxygen in the air to produce nitrogen monoxide and water. O 2NH3(g) + 302(g) → 2H3NO3(aq) O 2NH3(g) + 50(g) → 2NO(g) + 3H2O(1) O 4NH3(g) + 502(g) → 4NO(g) + 6H2O(1)