2. __H2 + __O2 --> __H2O, What are the coefficients to be used to balance the equation? A. 2,2,2 B. 0,2,2 C. 2,1,2 D .2,0,2

6 This is for my reviewer please help me with the step by step solution and answer, thank you

Given the combustion of gasoline:  2C8H18 + 25 O2 →16CO2 +18H2O How many moles of O2 is required to react with 4.00 moles of C8H18? Select one: a. 2.00 b. 50.0 c. 25.0 d. 12.5

1.  What are the coefficient used to balance the equation below?__Ag2O →__ Ag +___O2a. 2,4,1b. 1,1,1c. 1,4,2d. 2,2,22. Is the following equation balanced? Al + O2 --> 2Al2O3a. trueb. false3.  In chemical reactions, what does the principle of conservation of mass mean?a. The total mass of the reactants is less than the total mass of the products.b. Matter is not changed.c. Matter is not created or destroyed.d. The total mass of the reactants is greater than the total mass of the products.4. Is the following equation balanced or unbalanced ? Al + O2 --> Al2O3a. balancedb. unbalanced5.  Is the following equation balanced or unbalanced ? N2 +3 H2 --> 2NH3a. balancedb. unbalanced

Balance the chemical equation shown below. What coefficients need to be placed in front of which substances? * 3. Hg2l2 +_O2 → _ Hg2O + _ I2 - Your answer d to 3 points

Given the reaction: N₂(g) + 3 H₂(g) → 2 NH3(g) What is the mole-to-mole ratio between nitrogen gas and ammonia (NH3) gas? A. 1:2 B. 2:2 C. 1:3 D. 2:3

Multiple Choice. Read the statements carefully and answer the following questions.For no.7, 8, 9 and 10 refer to the chemical equation.REACTANTS PRODUCTN2 + 3 H2 -------→ 2 NH37. For the product 2 NH3 , What number represents the coefficient ?a. 1 b. 2 c. 3 d. none8. What number represents the subscript?a. 1 b. 2 c. 3 d. none9 What element is represented by the letter “ H “a. Hydrogen b. Helium c. Hydroxide10. How many atoms of “ H “ do you have ?a. 2 b. 3 c. 4 d. 6

Which of the following chemical equations is a correct dissociation equation a. NaCl(s) > Na+1 +Cl-1(aq) b. C2H5(OH) > C2H5OH(aq) c. LiOH(s) > Li+1(aq) +O-2(aq) d. C2H5OH(l) > C2H5O-1 +H+1(aq)

Could someone please Help! No plagiarism Please! 1. Consider the following reaction:  2H₂O (l)    →    2H₂ (g)    +     O₂ (g)                                   Which of the following statements is/are true for this reaction?                     A. This is a synthesis reaction. B. This is a decomposition reaction. C. This is a combustion reaction. D.None of the above   2. The reaction below shows the equation for the combustion of methane gas. How does the chemical equation demonstrate the Law of Conservation of Matter?   A. There is one CH₄ molecule on the reactant side and one CO₂ molecule on the product side of the reaction. B. There are two O₂ molecules on the reactant side and two H₂O molecules on the product side in the reaction. C. There are four oxygen atoms, four hydrogen atoms and one carbon atom on both the reactant and product side of the reaction. D. The reaction does not satisfy the Law of Conservation of Matter.   3. Chemists use the activity…

65. Lead ions can be precipitated from solution with NaCl according to the reaction: Pb²+ (aq) + 2 NaCl(aq) PbCl₂(s) + 2 Na+ (aq) When 135.8 g of NaCl are added to a solution containing 195.7 g of Pb²+, a PbCl2 precipitate forms. The precipitate is filtered and dried and found to have a mass of 252.4 g. Determine the limiting reactant, theoretical yield of PbCl2, and percent yield for the reaction.