mass

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…

Question Completion Status: QUESTION 2 Balancing refers to the number of substances put INTO a reaction has to equal the number of substance PRODUCED by the reaction. This means there must be an understanding of HOW MANY of something is put into a reaction. Match the following description with the HOW MANY X of each substance. Answers may be used once, more than once, or not at all. Example: 6 X3Cl means I have/need 18 X's Example: 10 HX means I have/need 10 X's Etc. - - - - - 3 X20 ✓ 2 Cax 4 XF2 5 AIX3 1 PBX4 ✓2 KX Click Save and Submit to save and submit. Click Save All Answers to save all answers. -4-531 84 A. 2X's B. 5 C. 15 X's D. 3 E. 4 X's F. 10 G. None of these H. 6X's 1.20 3000 103931 401818 / HOTEL hole-he artbl Save All Answers

Balance the following chemical equation by placing a coefficient (including 1) in each answer box that is in front of each reactant and each product. While coefficients that are equal to 1 are not placed in front of either a reactant or product, you MUST include any coefficient that is equal to 1 in this problem. type your answer... C6H8+ type your answer... 0₂ type your answer... CO₂ + type your answer... H₂O

For the reaction below, find the limiting reactant for each of the initial amounts of reactants. 2 Na(s) + Br2(g) ------> 2 NaBr(s)a. 2 mol Na, 2 mol Br2

12 Consider the following particulate-level representation. The larger spheres represent N, and the smaller spheres represent H. Which of the following statement correctly characterizes this representation? O The reactant could be represented as NH3. O The products of the reaction are N₂ and H₂. O The equation is "balanced." O If the equation for the reaction were written as shown above the coefficient of the nitrogen- containing product would be 4. O All of these statement correctly characterize this reaction.

Mass in chemical reactions

please answer this and provide the correct amount of sig figs

A sample of 0.75 g of hydrogen gas was obtained by reacting 32.5 g hydrochloric acid with 18.0 g magnesium. Mg(s) + 2 HCI (aq) --> MgCl₂ (aq) + H₂(g) What is the percent yield for this reaction? 100% 83% 41% 50%