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Amanda [17]
3 years ago
10

I need help with question 5 whoever helps could get Brainlest or extra credit

Chemistry
1 answer:
Scrat [10]3 years ago
3 0
1 is c 2 is b 3 is 1 d 4 is a
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How much percent of shops are in the city? How about in the country?
kolezko [41]

Answer:

I would say there would be 5-10% in a city, and maybe 10-20% in the country. It mainly varies depending on how big the city is, how many people/districts there are, and the size of the country, which makes it hard to give a certain percent of shops, as there may be small businesses included as well or new shops being built.

Hope this helps! This was pretty confusing for me as well so i hope the answer is alright (×﹏×)

7 0
2 years ago
How many particles would be found in a 89.2 g sample of Na?
julsineya [31]
One mole of a substance contains 6.02 × 10∧23 particles. Thus we first convert  89.2 g to moles. 1 mole of sodium contains 23 g
Hence 89.2 g = 89.2 / 23 g = 3.878 moles
Therefore, 3.878 × 6.02×10∧23 particles= 23.346 × 10∧23 particles
Hence 89.2 g of sodium contains 2.335 ×10∧24 particles 
5 0
3 years ago
How many carbon atoms are in the smallest cyclic hydrocarbon?
SOVA2 [1]
There are 3 carbon atoms
3 0
3 years ago
Read 2 more answers
How many moles of ethylene (C2H4) can react with 12.9 liters of oxygen gas at 1.2 atmospheres and 297 Kelvin?
Elena-2011 [213]
3 moles of oxygen will react with 1 mole of ethylene. Convert 12.9 L of oxygen to x moles of oxygen, then divide by three.
4 0
3 years ago
Read 2 more answers
What is the ratio of lactic acid (Ka = 1.37x10-4) to lactate in a solution with pH =4.49?
Natasha2012 [34]
When Ka =1.37 x 10^-4 

∴Pka = - ㏒Ka

          = -㏒ 1.37 x 10^-4 
          
           = 3.86

According to H- H equation: 

when PH = PKA + ㏒[conjugate base / weak acid]

when the lactate is the conjugate base and lactic acid is the weak acid 

∴ PH = Pka +㏒[lactate] / [lactic acid]

so, by substitution:


4.49 = 3.86 + ㏒[lactate]/[lactic acid]

∴[lactate]/[lactic acid] = 4.3

∴ [lactic acid] / [lactate] = 1/4.3 
            
                                        = 0.23
4 0
3 years ago
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