Q: How do scientists determine the number of neutrons in an isotope of an atom?
A. They find the number of protons.
B. They divide the atomic mass by two.
C. They add the number of

electrons and protons.
D. They subtract the atomic number from the atomic mass.

A: B. atomic number from mass number. Atomic number - mass number gives us the number of neutrons in an atom.

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Asked 10/22/2012 4:12:05 PM

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Choose the correct answer.
Find the sum: –85.53 + (–41.00)
A. –126.53
B. –44.47
C. 44.53
D. 126.47
**Weegy:**
–85.53 + (–41.00);
–85.53 - 41.00 = -126.53
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Expert Answered

Asked 10/18/2012 4:26:28 PM

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Choose the correct answer.
Find the sum of x + y, when x = 3.1, and y = 5.4
A. –8.5
B. –2.3
C. 2.3
D. 8.5
**Weegy:** 3.1 + 5.4 = 8.5 **User:** Choose the correct answer.
Find the sum of r + s, when r = –14.1 and s = 18.3
A. –32.4
B. –4.2
C. 4.2
D. 32.4
**Weegy:** -14.1 + 18.3 = 4.2 (More)

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Updated 5/16/2014 9:28:10 AM

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Which value of the variable makes the statement true?
m + 4 = – 6.7
A. m = 10.7
B. m = 2.7
C. m = –6.3
D. m = –10.7
**Weegy:** A. m = 10.7 **User:** Which value of x makes the equation true?
–4.9 = –5.7 + x
A. x = –10.6
B. x = –0.8
C. x = 0.8
D. x = 10.6
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Not Answered

Updated 5/16/2014 9:25:06 AM

2 Answers/Comments

m + 4 = – 6.7;

m = -6.7 - 4;

m = -10.7

The value of the variable that makes the statement true is:

m = –10.7

m = -6.7 - 4;

m = -10.7

The value of the variable that makes the statement true is:

m = –10.7

Added 5/16/2014 9:24:05 AM

This answer has been confirmed as correct and helpful.

–4.9 = –5.7 + x;

-x = -5.7 + 4.9;

-x = -0.8;

x = 0.8

The value of the variable that makes the statement true is:

x = 0.8

-x = -5.7 + 4.9;

-x = -0.8;

x = 0.8

The value of the variable that makes the statement true is:

x = 0.8

Added 5/16/2014 9:25:06 AM

This answer has been confirmed as correct and helpful.

Who is considered the founder of modern political science; wrote The Prince, describing how a strong ruler obtains power and keeps it and that strong rulers rule by whatever means necessary, which can be interpreted as the ends justify the means?
A.
Castiglione
B.
Machiavelli
C.
Leonardo da Vinci
D.
Erasmus
**Weegy:** B. Machiavelli. Niccolò Machiavelli is considered the founder of modern political science; wrote The Prince. (More)

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Expert Answered

Updated 7/4/2014 4:45:13 PM

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