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Colt1911 [192]
4 years ago
11

PLEASE HELP ME SOLVE!!!!

Mathematics
1 answer:
bekas [8.4K]4 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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The width of a rectangle measures (26 – 8c) centimeters, and its length measures
Oksi-84 [34.3K]

Answer:

first one is correct

Step-by-step explanation:

length of a rectangle = 2b - 8c

breadth of a rectangle = 10b + 6c

now , formula to calculate the perimeter of rectangle is

p = 2 (l + w)

no substitute the value of l(length) and w(width)

p = 2{(2b - 8c) + (10b + 6c)}

p = 2(2b - 8c + 10b + 6c)

p = 2(12b - 2c)

p = 24b - 4c

8 0
3 years ago
Divide 33 photos into two groups so that the ratio is 4 to 7
Andre45 [30]
Total ratio = 4+7 = 11
33/11 = 3
4x3 = 12
7x3 = 21
so the two groups are 12:21
which is also = 4:7
3 0
3 years ago
Please help me!! No files allowed. I need the answer and an explanation!
weqwewe [10]

Answer:

81/293

Step-by-step explanation:

and that is the simplest form because 293 is a prime number

3 0
4 years ago
Write an equation in slope-intercept form for this line.
slavikrds [6]

Answer:

y = - 8x - 4

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = - 8, then

y = - 8x + c ← is the partial equation

To find c substitute (- 1, 4 ) into the partial equation

4 = 8 + c ⇒ c = 4 - 8 = - 4

y = - 8x - 4 ← equation of line

7 0
3 years ago
Steak cost $3.85 per pound if you buy a 3 pound steak and pay for it with a $20 bill how much change will you get ?
Pie

Answer:

$ 8.45

Step-by-step explanation:

3.85 * 3 = 11.55

20 - 11.55 = 8.45

3 0
3 years ago
Read 2 more answers
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