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3 years ago

PLEASE HELP ME SOLVE!!!!

Mathematics

1 answer:

bekas [8.4K]3 years ago

4 0

Answer:

Option C. 0.7x10^2 moles

Step-by-step explanation:

1mole of a substance contains 6.02x10^23 atoms as discovered from Avogadro's hypothesis.

If 1 mole of Ne contains 6.02x10^23 atoms,

Therefore, Xmol of Ne will contain 4.2154x10^25 atoms i.e

Xmol of Ne = (4.2154x10^25)/6.02x10^23 = 70moles = 0.7x10^2 moles

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Marat540 [252]

The answer is 1, however, i do not know how to show the work. Sorry!

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2 years ago

WILL MARK BRAINLIEST

LuckyWell [14K]

Answer:

Area of the figure = 42 units²

Step-by-step explanation:

Area of the given figure = Area of rectangle JKIG - (Area of ΔEJD + Area of ΔCKD + Area of ΔCIH + Area of ΔEFG)

Area of rectangle JKIG = JK × JG

= 8 × 8

= 64 units²

Area of ΔEJD = $\frac{1}{2}(EJ)(JD)$

= $\frac{1}{2}(6)(3)$

= 9 units²

Area of ΔCKD = $\frac{1}{2}(CK)(KD)$

= $\frac{1}{2}(5)(2)$

= 5 units²

Area of ΔCIH = $\frac{1}{2}(CI)(IH)$

= $\frac{1}{2}(3)(2)$

= 3 units²

Area of ΔEFG = $\frac{1}{2}(FL)(EG)$

= $\frac{1}{2}(5)(2)$

= 5 units²

Area of the given figure = 64 - (9 + 5 + 3 + 5)

= 64 - 22

= 42 units²

4 0

2 years ago

A machine that produces ball bearings has initially been set so that the mean diameter of the bearings it produces is 0.500 inch

natali 33 [55]

Answer:

Step-by-step explanation:

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5 0

2 years ago

On Saturday, you bowl at Mar vista Bowl, where renting shoes costs $2 and each game bowled is $3.50. On Sunday, you bowl at Pinz

7nadin3 [17]

Answer:

12 games

Step-by-step explanation:

Let the number of games is g

Total cost at Mar Vista:

3.5g + 2

Total cost at Pinz:

3.25g + 5

Since same amount spent in both places, we have:

3.5g + 2 = 3.25g + 5
3.5g - 3.25 = 5 - 2
0.25g = 3
g = 3/0.25
g = 12

8 0

2 years ago

Write the equation of a line that is perpendicular to y=-2/7x+9 and passes through the point (4,-6)

Ulleksa [173]

This is in slope-intercept form, so you can think of it as being y=mx+b. Invert m (the slope) and flip its sign, and then substitute the x and y values in and solve for b. The answer is y=7/2x-20.

6 0

2 years ago

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