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3 years ago

Do you think the ingredients changing into a cake

Chemistry

1 answer:

Nata [24]3 years ago

7 0

It is a chemical reaction because the baking soda or powder undergoes a chemical reaction

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What is the final temperature when 625 grams of water at 75.0 C loses 7.96 x 10 to the fourth power J ? The specific heat of wat

IgorLugansk [536]

The final temperature : 44.5 °C

<h3>Further explanation</h3>

Heat can be formulated :

Q = m . c .Δt

Q = heat, J

m = mass, g

c = specific heat, J/gC

Δt= temperature

m= 625 g

Q=7.96 x 10⁴ J

c = 4.18 j/gC

t₁=75 C

$\tt Q=m.c.\Delta t\\\\7.96\times 10^4=625\times 4.18\times (75-t_2)\\\\75-t_2=30.5\\\\t_2=44.5^oC$

3 0

2 years ago

You’re probably familiar with the sour taste of acidic lemon juice and the slippery feel of alkaline (basic) soap. In fact, thes

Nimfa-mama [501]

Answer:

9.606 grams of citric acid are present in 125 mL of a 0.400 M citric acid solution.

Explanation:

Molarity : It is defined as the number of moles of solute present in one liter of solution. Mathematically written as:

$Molarity=\frac{\text{Moles of solute}}{\text{volume of solution in L}}$

Moles of citric acid = n

Volume of the citric acid solution = 125 mL =125 × 0.001 L= 0.125 L

(1 mL = 0.001L)

Molarity of the citric acid solution = 0.400 M

$0.400 M=\frac{n}{0.12 5L}$

n = 0.400 M × 0.125 L = 0.05 moles

Mass of 0.05 moles of citric acid :

$0.05 mol\times 192.12 g/mol=9.606 g$

9.606 grams of citric acid are present in 125 mL of a 0.400 M citric acid solution.

5 0

3 years ago

Which of the following is not an indicator of a chemical reaction?

Cloud [144]

Answer:

Hello There!!

Explanation:

C. a color change

Colour is not an indicator. Sorry if I'm wrong.

hope this helps,have a great day!!

~Pinky~

3 0

2 years ago

Can anyone give an image of your own science room

madam [21]

Answer:

i don't have one :(

Explanation:

just doing for points sorry plz mark me as brainliest

6 0

3 years ago

A 251 ml sample of 0.45M HCl is added to 455 mL of distilled water. What is the molarity of the

Oksi-84 [34.3K]

<u>We are given:</u>

251 mL sample of 0.45M HCl added to 455 mL distilled water

<u>Whack a mole! (finding the number of moles):</u>

We know that in order to find molarity, we use the formula:

Molarity = number of moles / Volume (in L)

so, number of moles is:

Number of moles = Molarity * Volume(in L)

now let's plug the values for the HCl solution to find the number of moles

Number of moles = 0.45M * 0.251 L

Number of moles = 0.113 moles

<u>Time to concentrate (finding the final concentration):</u>

Total final volume = 251 mL + 455 mL = 706 mL = 0.706 L

Number of moles of HCl = 0.113 moles

Molarity = Number of moles / Volume (in L)

Molarity = 0.113 / 0.706

Molarity = 0.16 M

___________________________________________________________

<u>BONUS METHOD TIME!!!</u>

We know the relation:

M1 * V1 = M2 * V2

where M1 and M2 are the initial and final molarities and V1 and V2 are initial and final volumes respectively

notice that I didn't mention that the volume has to be in Liters, that's because of the units being concerned with both sides of the equation, say I have the volume in mL and want to convert both these volumes to L, I would divide both sides by 1000, which would NOT change the overall value

Now, plugging values in this equation

(0.45) * (251) = (251 + 455)* (M2)

112.95 = (706)(M2)

M2 = 112.97/706 [dividing both sides by 706]

M2 = 0.16 Molar

8 0

2 years ago