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3 years ago

Understanding Acceleration: Remember, acceleration is speeding up, slowing down, or changing direction.

Chemistry

2 answers:

Georgia [21]3 years ago

6 0

Answer:

<h2>∞∞∞∞∞∞║⊕║Hello Person║⊕║∞∞∞∞∞∞</h2>

Your answer should be:

1. No 

2. Yes

3. No

4. Yes

5. No

Explanation:

I hope this answered your question.

Brainliest would be appreciated!

Have a wonderful day!

s2008m [1.1K]3 years ago

6 0

Answer:

I dont know

Explanation:

ONLY HEAR FOR POINts

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There are three isotopes of X element (X):

Nutka1998 [239]

Answer:

Average atomic mass = 17.5 amu.

Explanation:

Given data:

X-17 isotope = atomic mass17.2 amu, abundance:78.99%

X-18isotope = atomic mass 18.1 amu, abundance 10.00%

X-19isotope = atomic mass:19.1 amu, abundance: 11.01%

Average atomic mass of X = ?

Solution:

Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100

Average atomic mass = (78.99×17.2)+(10.00×18.1) +(11.01+ 19.1) /100

Average atomic mass = 1358.628 + 181 +210.291 / 100

Average atomic mass = 1749.919 / 100

Average atomic mass = 17.5 amu.

8 0

3 years ago

If 45 mL of water are added to 250 mL of a 0.75 M K2SO4 solution, what will the molarity of the diluted solution be?

krok68 [10]

Answer:

$\large\boxed{\large\boxed{0.64M}}$

Explanation:

When you form a diluted solution from a mother (concentrated) solution, the moles of solute are determined by the mother solution.

The main equation is:

$Molarity=\dfrac{\text{moles of solute}}{\text{volume of the solution in liters}}$

Then, since the moles of solute is the same for both the mother solution and the diluted solution:

$\text{Molarity mother solution }\times\text{ volume mother solution}=\\\\=\text{Molarity diluted solution }\times\text{ volume diluted solution}$

Substitute and solve for the molarity of the diluted solution:

$250mL\times 0.75M=(45mL+250mL)\times M\\\\\\M=\dfrac{250mL\times 0.75M}{295mL}=0.64M$

8 0

3 years ago

What does the second law of thermodynamics say about entropy?

Annette [7]

Answer:

the ansnwer is c mf kf n dsj njnr kgjrk nj ee h ewfkjhnf ewjn fnkwfnjnfnfunf

Explanation:

because is sooo goood

8 0

3 years ago

Read 2 more answers

For a tablet containing 500. mg of vitamin C, calculate how many ml of 0.095 M NaOH is required to reach the equivalence point.

Gala2k [10]

Answer:

mL of NaOH required =29.9mL

Explanation:

Let us calculate the moles of vitamin C in the tablet:

The molar mass of Vitamin C is 176.14 g/mole

$moles=\frac{mass}{molarmass}=\frac{500mg}{176.14}=\frac{0.5}{176.14}=0.0028$

Thus we need same number of moles of NaOH to reach the equivalence point.

For NaOH solution:

$moles=MolarityXvolume=0.095Xvolume$

$0.00283=0.095Xvolume$

$volume=0.0299L=29.9mL$

7 0

3 years ago

Select the word or phrase that best completes each of the following sentences.

harina [27]

Answer:

1. Cells

2. Molecules

3. Organ

3 0

3 years ago

Read 2 more answers