Cow’s milk is 4.5% by mass of lactose. Calculate the mass of lactose present in 175 g of milk

Response:1816.6 joules

Clarification:refer to the attached image

I predict that there will be an increase in the seconds recorded in the time column. This is because, as more water is mixed with sodium thiosulfate, its concentration diminishes in each flask. Additionally, a lower concentration results in a slower reaction rate since fewer molecules of sodium thiosulfate means there are less frequent collisions with sulfuric acid. With fewer collisions occurring in the reaction, it takes a longer time for the reaction to complete, leading to increased time when sodium thiosulfate is diluted.

Explanation:

I can confirm that this explanation is accurate.

1) The chemical formula for propane is CH₃-CH₂-CH₃. 
Propane is classified as a three-carbon alkane (acyclic saturated <span>hydrocarbon).
</span>2) The chemical formula for propanal is CH₃-CH₂-CH=O.
Propanal <span> is a </span>saturated<span> three-carbon </span>aldehyde (consists of<span> a </span>carbonyl<span> center).
3) </span>The chemical formula for propanol is CH₃-CH₂-CH₂-OH.
1-propanol <span> is a </span><span>primary alcohol.
4) </span>The chemical formula for propanone is (CH₃)₂-C=O.
Propanone, also known as acetone, is <span>the simplest and smallest</span> ketone.

Answer:

Step 1:

N

H

+

3

C

H

2

C

H

2

N

H

+

3

(

a

q

)

⇌

A.

K

a

1

B.

K

a

2

C.

K

b

1

D.

K

b

2

Step 2:

N

H

2

C

H

2

C

H

2

N

H

+

3

(

a

q

)

⇌

A.

K

a

1

B.

K

a

2

C.

K

b

1

D.

K

b

2

Acid-