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Shalnov [3]
3 years ago
6

How many valenence electons does sodium have?

Chemistry
2 answers:
olganol [36]3 years ago
7 0
8 valence electrons :)
nikklg [1K]3 years ago
5 0

sodium has 8 valenence electrons

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What is the reduction half-reaction for the reaction of zinc with hydrochloric acid?
german
2HCl (aq) + Zn²⁺   ⇒  ZnCl₂  + 2H⁺         Total Reaction 
    
Leo goes Ger (Lose electron oxidize, Gain electron reduction)

Zn²⁺ + 2e⁻  ⇒ Zn     Oxidation half-reaction 

2H ⇒ 2H⁺ + 2e⁻       Reduction half-reaction                      
6 0
3 years ago
Nitric Oxide gas react to form nitrogen dioxide as shown in the following reaction:
Zina [86]

Answer:

2 moles of NO2 would be produced.

Explanation:

Here, you will have to do a mole to mole ratio.

2 moles NO x (2 moles NO2 / 2 moles NO)

= 2 moles NO2

6 0
3 years ago
Reduce the following molecular formulas to empirical formulas. Please help!
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This is done by reducing each number by a common factor for each formula.

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H2O2- all can be divided by 2 -> H1O1 (had to put the 1's bc of the unintended language) 

C8H8S2- all can be divided by 2 -> C4H4S 

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*****it is important to note that <em>all </em>numbers in the molecular formula are divided by the same thing to reduce them. decimals are <em>never </em>used in empirical formulas, only whole numbers.*****
3 0
3 years ago
A 455 g piece of bopper tubing is heated to 89.5 C and placed in an insulated vessel containing 159 g of water at 22.8 C. Assumi
postnew [5]

Answer:

The final temperature of the setup = 36.6°C

Explanation:

Let the final temperature of the setup be T

Heat lost by the copper tubing = Heat gained by water and the vessel

Heat lost by the copper tubing = mC ΔT = 455 × 0.387 × (89.5 - T) = (15759.61 - 176.1T) J

Heat gained by water = mC ΔT = 159 × 4.186 × (T - 22.8) = (665.6T - 15175.1) J

Heat gained by vessel = c ΔT = 10 × (T - 22.8) = (10T - 228) J

Heat lost by the copper tubing = Heat gained by water and the vessel

(15759.61 - 176.1T) = (665.6T - 15175.1) + (10T - 228)

851.7 T = 31162.71

T = 36.6°C

7 0
3 years ago
Is si a molecular, metallic, ionic, or covalent-network solid?
12345 [234]

Answer:

I think Its Ionic but It might be metallic I know it's one of those two

Explanation:

8 0
3 years ago
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