Chemistry

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1. Chemistry

   which of the following are redox reactions a. 2Na+2H2O-->2Naoh+H2 b. MgBr2+2NaF-->MgF2+2NaBr c. 2CO+O2--> 2CO2 d. SO2+H2O--> H2SO3 For those reactions that are redox reactions: Indicate which atoms get oxidized and which atoms get

2. chemistry

   In the reaction 2HNO3(aq) + Cu(s) + 2H+(aq) ¨ 2NO2(g) + Cu2+(g) + 2H2O(l) Which of the following statements is correct? A.HNO3 is the reducing agent, and Cu is the oxidizing agent B.HNO3 is the reducing agent, and H+ is the

3. chemistry

   Reaction 1: Cu (strongest reducing agent) I- Ag Br- (weakest reducing agent) Reaction 2: Zn(strongestreducing agent) Pb Cu Ag(weakest reducing agent) Reaction 3: Cl2 (strongest oxidizing agent) Br2 I2 (wekest oxidizing agent)

4. Science

   2Na(s) + 2H2O(aq) = 2NaOH (aq) + H2 (g) Is this reaction exothermic or endothermic? I don't understand ,

5. W.H.Atwell

   Does 2Na 2H2O 2NaOH H2 shows that the total mass during a chemical reaction stays the same?

6. chemistry

   How much heat (in kilocalories) is evolved or absorbed in the reaction of 1.60 g of Na with H2O? 2Na(s)+2H2O(l)→2NaOH(aq)+H2(g), ΔH = -88.0 kcal (-368 kJ)

7. chemistry

   Determine how much heat (in kilojoules) is evolved or absorbed in the reaction of 1.05 g of Na with H2O: 2Na(s)+2H2O(l) →2NaOH(aq)+H2(g),ΔH∘=−368.4 kJ

8. Chemistry

   How much heat (in kilojoules) is evolved or absorbed in the reaction of 2.65 g of Na with H2O? 2Na+2H2O ---> 2NaOH + 2H2 Delta H= -368.4

9. chemistry

   The equation for the reaction of sodium with water is as follows: 2Na(s)
   2H2O(l) £ H2(g)
   2NaOH(aq) How many liters of H2 are produced when 12.0 g of Na reacts with H2O at 293 K and 99.3 kPa?

10. Biology/Chemistry

    During a “perm”, disulfide bonds can be broken and reformed using which treatments, respectively? I think the answer is a. but can someone confirm this? a. an oxidizing agent followed by a reducing agent b. a reducing agent

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