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vichka [17]
3 years ago
13

A water molecule is made up of 3 atoms. One third of the atoms are oxygen and the remaining atoms are hydrogen. If there are 114

water molecules, how many hydrogen atoms are there? Show your work
Mathematics
1 answer:
Mashcka [7]3 years ago
7 0

Answer:

228 hydrogen atoms

Step-by-step explanation:

In a water molecule,

1/3rd is oxygen atoms, and

2/3rd (1 - 1/3 = 2/3) is hydrogen atoms

If there are 114 water molecules,

Total number of atoms would be:

3 * 114 = 342 (1 oxygen and 2 hydrogen atoms in 1 water molecule)

Out of these, 2/3rd would be hydrogen atoms, so:

\frac{2}{3}*342=228

There would be 228 hydrogen atoms

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In a doctor's office, the receptionist's annual salary is $159,000 less than that of the doctor. Together, the doctor and the re
Ann [662]

Answer:

The salary of Doctor = $193,000

The salary of Receptionist = $34,000

Step-by-step explanation:

Given as,

Together ,the Doctor salary and the Receptionist salary = $ 227,000 per year

And the salary of Receptionist = The Doctor salary -$159,000 per year

Let the salary of Doctor = x

So, the Receptionist salary = x - $159,000 per year

And x + Receptionist salary = $ 227,000 per year

       x + x - $159,000 per year = $ 227,000 per year

Or,   2x = $ 386,000 per year

Or,     x = $ \frac{386000}{2}

Or,     x = $ 193,000

And the salary of Receptionist = $193,000 - $159,000 = $34,000

Hence,  The salary of Doctor = $193,000

And,       The salary of Receptionist = $34,000

8 0
3 years ago
Can someone answer this question please?
Anna007 [38]

Answer:

For more than 35 miles company A will charge less than company B

Step-by-step explanation:

Let us write the equation of the cost of each company

Company A:

∵ Company A charges $96 for unlimited mileage

∴ The cost of company A = 96

Company B:

∵ Company B charges an initial fee of $75

∵ It charges $0.6 for every mile driven

∵ The number of miles is m

- Multiply m by 0.6 and add 75 to the product

∴ The cost of company B = 75 + 0.6 m

∵ Company A will charge less than company b

∴ 96 < 75 + 0.6 m

- Subtract 75 from both sides

∴ 21 < 0.6 m

- Divide both sides by 0.6

∴ 35 < m

- That means m is greater than 35

∴ m > 35

For more than 35 miles company A will charge less than company B

7 0
3 years ago
he width and length of a rectangle (in feet)are consecutive odd integers. If the length is increased by 5 feet, the area of the
Ivanshal [37]

The original area of the rectangle is 35ft^{2}

<u>Explanation:</u>

width = x

length = x + 2

area of the rectangle = x (x+2)

length = x + 2 + 5 = x+7

60 = (x+7) (x)\\60=x^{2} + 7x\\x^{2}  + 7x - 60 =0\\

Solving this equation, we get

x =5ft

So, original  width = 5ft

original length = 5+2ft = 7ft

Thus, original area of the rectangle = 5 X 7ft = 35ft^{2}

Therefore, the original area of the rectangle is 35ft^{2}

3 0
3 years ago
What numbers multiplied equal to -4 and add up to 8
crimeas [40]

Answer:

scdeceece

Step-by-step explanation:

rfqscf

8 0
3 years ago
Help me with this question ASAP
makkiz [27]

11. D. $5.50

12. B. $21.35

5 0
3 years ago
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