In the book and movie, The Martian, the lead character (Mark Watnay) produced wa

Question

In the book and movie, The Martian, the lead character (Mark Watnay) produced water from hydrogen he generated starting from hydrazine (N_2H_4). The first chemical reaction in the process he used involved the decomposition of J molecules of hydrazine into 4 molecules of ammonia (NH_3) and 1 molecule of nitrogen (N_2). Write the chemical reaction equation that matches this description (use appropriate subscripting). In the book and movie, The Martian, the lead character used hydrazine in a process water. One of the reactions in that process is shown in unbalanced form below: N_2H_4 rightarrow N_2 + H_2 What coefficient should placed in front of the N_2H_4 in the final balanced equation? _____ What coefficient should be placed in front of the N_2 in the balanced equation? _____ What coefficient should be placed in front the H_2 in the final balanced equation? _____ The following reaction represents the result of mixing aqueous solutions of sodium chloride and silver (I) nitrate: NaCl(aq) + AgNO_3(aq) rightarrow NaNO_3(aq) + AgCl(s) Write the TOTAL and NET IONIC equations for this process (label which is which). Use subscripts and superscripts appropriately. Explain why the two equations are not identical. Select any of the following reactions that should be classified as precipitation reactions by applying solubility rules. LiCl + AgNO_3 rightarrow LiNO_3 + AgO 2NH_4Cl + CaBr_2 rightarrow 2NH_4Br + CaCl_2 Pb(HCO_3)_2 + CaBr_2 rightarrow 2NH_4Br + CaCl_2 Pb(HCO_3)_2 + 2NaSO_4 rightarrow Pb(SO_4)_2 + 2 NaHCO_3

Explanation / Answer

the reaction is 3N2H4------>4NH3+N2 ( there are 6 atoms of N2 and 12 atoms of hydrogen and all this has to come from N2H4)

2. N2H4----->N2+2H2

3. NaCl (aq) + AgNO3 (aq)---->AgCl(s)+ NaNO3 overall

Na+Cl- + Ag+ +NO3- --------->AgCl + Na+ +NO3- ionic

Ag+ +Cl- ------>AgCl (s)

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