All categories

2 years ago

How many moles are in 25g of CO2? With calculation show please

Mathematics

2 answers:

GuDViN [60]2 years ago

5 0

Here’s the answer! Let me know if you have any questions

goldenfox [79]2 years ago

3 0

Answer:

0.568 moles (3 s.f.)

Step-by-step explanation:

no. of moles= mass ÷mr

Mr (molecular mass) is the sum of atomic masses of the atoms in the compound. The atomic mass can be found from the periodic table.

Mr of CO₂

= 12 + 2(16)

= 44 amu

Thus, no. of moles

= 25 ÷44

= 0.568 moles (3 s.f.)

You might be interested in

I need the answers for 2 and 3

Korolek [52]

2- x= -2 y= -1 so the slope is -1/-2
3- x= 2 y= 3 so the slope is 1 1/2
i’m not sure if this is right but i’m learning this as well

5 0

2 years ago

1 point An old Honda Civic can go 351 miles on average before it runs out of gas. Its tank holds 11 gallons of gas. What is the

ad-work [718]

Answer:

32 miles per gallon

Step-by-step explanation:

351 divided by 11 = 31.90909090909090909090909090 e.t.c

8 0

2 years ago

Find the approximate solution of this system of equations. y=x^2+5x+3 y=square root2x+5

Anni [7]

We have that
y=x²<span>+5x+3
y=</span>√(<span>2x+5)

using a graph tool
see the attached figure

the solution is
x=-0.175
y=2.156

therefore

the answer is the option
</span>B.) (-0.2, 2.1)

6 0

2 years ago

Read 2 more answers

If you are self-employed, you don't have to pay FICA on all your salary, just on 92.35% of it. If your salary is $128,255 what i

Artist 52 [7]

Answer:

The amount that I am required to pay monthly as FICA if my salary remains constant is $18,121.85¢

Step-by-step explanation:

Federal insurance contributions act is a law that mandates all employers of labour to withhold medicare and certain taxes from the wages that are paid to employees or workers. These taxes are remitted to the government later which is then used for the provision of basic amenities and quality health care.

Since, I am only required by law to pay FICA on only 92.35% of my monthly salary, we need to calculate the the actual amount that makes up 92.35 percent of my monthly salary.

If $128,255 is my current monthly salary, then 92.35% of it will be:

92.35/100 × 128,255

= 0.9235 × 128,255

= $118,443.49¢

This is the part of his monthly salary that he is required by law to pay FICA on.

Then, if FICA is 15.3% of a worker's taxable income, then I am required to pay 15.3% of the taxable $118,443.49¢ since I am self employed and mustn't pay it on the entire $128,255 that I earn monthly.

My monthly FICA contribution is then:

15.3/100 × 118,443.49

= 0.153 × 118,443.49

= $18,121.85¢.

Therefore, if my salary remains constant, the amount that I am required by law to pay monthly as FICA is $18,121.85

6 0

3 years ago

Read 2 more answers

The product of a binomial and trinomial is x^3+3x^2-x+2x^2+6x-2 which expression is equivalent to this product after it has been

Debora [2.8K]

Answer: First option.

Step-by-step explanation:

You know that the product obtained by multiplying a binomial and a trinomial is:

$x^3+3x^2-x+2x^2+6x-2$

Then, in order to simplify this product, it is necessary to add the like terms.

Therefore, the expression that is equivalent to this product after it has been fully simplified is:

$=x^3+(3x^2+2x^2)+(6x-x)-2\\\\=x^3+5x^2+5x-2$

You can observe that this matches with the first option.

9 0

2 years ago