110 Answered Questions for the topic Chemical reactions

Chemical Reactions Science Chemistry High School

04/21/22

#### Hello! What is the reactant for NaOH (aq) + CuSO4 (aq) and also for Al (s) + CuCl2 (aq)?

I'm having trouble understanding our chemical reactions lesson at the moment. I've tried looking at other examples online but I can't comprehend them well. Any answers are appreciated. Thank you!
Chemical Reactions Chemistry Stoichiometry

03/09/22

#### How many moles of lithium nitrate will be needed to make 2.45 moles of Pb(NOg)4, assuming that you have an adequate amount of Pb(SO4)2 to do the reaction?

I'm completely lost on this one. Help!
Chemical Reactions Science Chemistry Moles

06/15/21

#### 4NH3 + 5O2 = 4NO + 6H2O How many grams of Oz were required to make 10.00 grams of H20?

Grateful for any help given!
Chemical Reactions Science Chemistry Moles

06/15/21

#### 4NH3 + 5O2 = 4NO + 6H2O How many grams of O2 are needed to completely react with 3.315 moles of NH3?

Grateful for any help given!
Chemical Reactions Science Chemistry Moles

06/15/21

#### 4NH3 + 5O2 = 4NO + 6H2O If you made with 9.67 moles of H20, how many moles of NO were also produced?

Already balanced equation I keep getting this one wrong and I'm not sure if it's my setup or if I'm dividing something wrong. Grateful for any help given!
Chemical Reactions Science Chemistry Moles

06/11/21

#### Mass of CaCl2: 10,0 g Mass of Na2CO3: 10.0 g Actual amount collected: 2.00 g CaCO3 1. Write a balanced chemical equation.

A student performs a lab at school. They massed out both reactants and then mixed them together. The reaction produced a precipitate. They filtered out the product and took the mass of it. (I'm a... more
Chemical Reactions Science Chemistry Moles

06/10/21

#### H2SO4 + 2 NaOH = Na2SO4 + 2 H2O How many grams of Na2SO4 could be produced from 4.94 moles of sulfuric acid?

Grateful for any help given!
Chemical Reactions Science Chemistry Moles

06/10/21

#### C2H6 + 7O2 = 4 CO2 + 6 H2O If you wanted to produce 5.83 moles of carbon dioxide, how many moles of oxygen would you needed to have started with?

Grateful for any help given!
Chemical Reactions Science Chemistry Moles

06/10/21

#### 2 C2H6 + 7O2 = 4 CO2 + 6 H2O If 0.31 moles of H 2 O were produced, how many moles of carbon dioxide would also have been produced?

Grateful for any help given!
Chemical Reactions Science Chemistry Moles

06/09/21

#### 2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH How many moles of CaB 2 are produced, if 14.72 moles of NaBr and excess Ca(OH) 2 react?

Grateful for any help given!
Chemical Reactions Science Chemistry Moles

06/09/21

#### 2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH What was the initial mass of calcium hydroxide for a reaction that produced 52.9 g of NaOH?

Grateful for any help given!
Chemical Reactions Biology Chemistry Biochemistry

05/11/21

#### What is the percentage yield of aspirin? (STOICHIOMETRY)

Density of Acetic Acid = 1.082 g/mlMass of Salicylic Acid = 5.102 gVolume of Acetic anhydride = 10.00 mlMass of filter paper = 0.0654 g Mass of watch glass = 8.677 gMass of filter paper,... more

04/01/21

#### What type of reaction is this?

Al(s) + 3Ag(NO3)2(aq) ===> Al(NO3)2(aq) + 3Ag(s)Double displacement?
Chemical Reactions Chemistry Highschool Apex

11/17/20

#### How do collisions between molecules transfer energy from a system of reacting substances to its surroundings?

A.) They cause heat to flow from the system to the surroundings.B.) They cause the thermal energy of the surroundings to decrease.C.) They cause the potential energy of the system to increase.D.)... more
Chemical Reactions Chemistry Stoichiometry

10/16/20

1(a) sodium and water react to give sodium hydroxide and hydrogen gas, H2 and 1.15 grams of sodium were added to excess oxygen and produced 1.6grams of sodium hydroxide. What was the percentage... more
Chemical Reactions Science Chemistry Homework

09/11/20

#### If you burn 33.7g of hydrogen and produce 301g of water, how much oxygen reacted?

In the combustion of hydrogen gas, hydrogen reacts with oxygen from the air to form water vapor.Hydrogen + Oxygen —> WaterIf you burn 33.7g of hydrogen and produce 301g of water, how much... more
Chemical Reactions Science Chemistry Chem

04/25/20

#### Rate of reaction question

I. Increasing the temperature increases the rate of a chemical reaction BECAUSE II. the activation energy is lowered. A) I is TRUE, II is FALSE B) I is FALSE, II is TRUE C) I and II are BOTH FALSE... more
Chemical Reactions Chemistry Balancing Equations Chem

04/20/20

#### Balance the equation and write the FULL and NET ionic equations when given the reaction equation: HCl (aq) + Sr(OH)₂ (aq) -> SrCl₂ (aq) + H₂O (l)

Chemical Reactions Math Chemistry Problem

11/24/19

#### A coffee cup has a heat capacity of 62.6J∘C. If the coffee cup's temperature increases by 1.20∘C, how much heat has it absorbed?

Chemical Reactions Chemistry Temperature Specific Heat

11/24/19

#### An unknown metal absorbs 23.8J of heat, and its temperature increases by 15.4∘C. What is the heat capacity of the metal?

Chemical Reactions Chemistry

11/19/19

#### 45.0 g of ice at –10.0 C is mixed with 325 g of water at 37.0 C. Calculate the final temperature of the mixture.

45.0 g of ice at –10.0 C is mixed with 325 g of water at 37.0 C. Calculate the final temperature of the mixture. Assume that no energy in the form of heat is transferred to the environment. (Heat... more
Chemical Reactions Chemistry General Chemistry Hydrates

11/05/19

#### mixture of MnSO4 and MnSO4*4H20 has a mass of 2.005 g. After heating to drive off all the water the mass is 1.780 g. How many grams of MnSO4*4H20 are present in the mixture?

A mixture of MnSO4 and MnSO4*4H20 has a mass of 2.005 g. After heating to drive off all the water the mass is 1.780 g. How many grams of MnSO4*4H20 are present in the mixture? What is the mass... more

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