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ipn [44]
2 years ago
14

This investigation is a controlled experiment, so you can change only one variable at a time. Which reactant do you think Koby s

hould change, the baking soda or the vinegar? Give a reason for your choice.
Chemistry
1 answer:
WINSTONCH [101]2 years ago
6 0

Answer:

The baking soda

Explanation:

This is the more reactive part of the experiment. The more baking soda there is (compared to the vinegar), the stronger the reaction.

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A 25.0 mL sample of 0.105 M HCl was titrated to the equivalence point with 31.5 mL of NaOH. What is the concentration of the NaO
Andrei [34K]

Answer:  The concentration of NaOH is 0.08 M.

Explanation:-

According to the neutralization law,

n_1M_1V_1=n_2M_2V_2

where,

M_1 = molarity of HCl solution = 0.105 M

V_1 = volume of HCl solution = 25 ml

M_2 = molarity of NaOH solution = ?

V_2 = volume of NaOH solution = 31.5 ml

n_1 = valency of HCl = 1

n_2 = valency of NaOH = 1

1\times 0.105M\times 25=1\times M_2\times 31.5

M_2=0.08M

Therefore, the concentration of NaOH is 0.08 M.

5 0
2 years ago
The total number of each element is not changed during a chemical reaction
Paha777 [63]

false all element when they are combined eachother thier valance number will change

the combination of oxygen and aluminum gives us Al2O3 see even the numbers are changing thank you if you have a comment you can write

3 0
3 years ago
A solution is made by dissolving 26.42g of (NH4)2so4 in enough h2o to make 50.00ml of solution
DochEvi [55]
Moles of ammonium sulfate = 26.42/molar mass of (NH4)2SO4
                                             =   26.42/132.14 = 0.19 mole.

Molarity = moles of ammonium sulfate/volume of solution
             =                0.19/50x10^-3
             =                    3.8M

6 0
3 years ago
Read 2 more answers
Please help I need a 100
svlad2 [7]

your answer would be C.

6 0
3 years ago
Read 2 more answers
Which structure is responsible for bringing in the amino acids? (Points : 1)
Rainbow [258]
Well the answer to number 1 is definitely B
 
number 2 is B

number 3 is D

Number 4 is C

Hope this helps:)



5 0
3 years ago
Read 2 more answers
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