Chemistry, 05.01.2021 23:00 Jennybelandres1
K2S(aq) + Co(NO3)2(aq) → CoS (?) + KNO3 (?)
a. Write a balanced chemical equation. (1 pt)
b. If a reaction occurs, write the balanced chemical equation with the proper states of matter (i. e. solid, liquid, aqueous) filled in. If no reaction occurs, write “No reaction.” (1 pt)
c. If a reaction occurs, write the net ionic equation for the reaction. If no reaction occurs, write “no reaction.” (1pt)
Na2CO3(aq) + Pb(OH)2(aq) → NaOH (?) + PbCO3(?)
a. Write a balanced chemical equation. (1 pt)
b. If a reaction occurs, write the balanced chemical equation with the proper states of matter (i. e. solid, liquid, aqueous) filled in. If no reaction occurs, write “No reaction.” (1 pt)
c. If a reaction occurs, write the net ionic equation for the reaction. If no reaction occurs, write “no reaction.” (1 pt)
5. You have an aqueous solution of lithium sulfate (Li2SO4). Using ONLY the list of ions in Figure 1 and the list of solubility rules in Figure 2, complete the following steps. Remember to follow lower numbered rules first.
a. Name an ionic compound (cations and anions combined) that 1) is soluble in water on its own and 2) when mixed with an aqueous solution of Li2SO4, forms a solid precipitate (1 pt)
b. Write the net ionic equation for the reaction between Li2SO4 and the compound you chose. (2 pts)
Answers: 3
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An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g
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Using data from seismic waves, geologists have learned that earth’s interior is made up of several
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4al + 3o2 → 2al2o3 what does the "3" in front of o2 stand for? a) it indicates that there are 5 oxygen atoms after you add the coefficient and the subscript. b) it indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule. c) it indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction. d) it indicates that there are 3 separate oxygen molecules in the reaction.
Answers: 2
K2S(aq) + Co(NO3)2(aq) → CoS (?) + KNO3 (?)
a. Write a balanced chemical equation. (1 pt)
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