3 years ago

PLS HELP ME WITH THESE I WILL MARK U AS BRAINLIEST!!

Chemistry

1 answer:

netineya [11]3 years ago

7 0

Answer:

uy pasagot kung nasagutan mo na pls wala pa akong sagot jan

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An atom of aluminum (Al) has an atomic number of 13 and a mass number of 27. How many neutrons does it have? O A. 27 O B. 40 O C

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Answer:

C. 14

Explanation:

The mass number is the number of protons + neutrons and the atomic number is the number of protons.

If the mass number is 27, you subtract the atomic number, 13.

27 - 13 = 14 neutrons

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4 years ago

Which of the following characteristics is common to both acids and bases? a. They produce ions when dissolved in water. b. They

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a. They produce ions when dissolved in water.

acids in water

HA + H2O --> H3O+ + A-

HA --> H+ + A-

bases

B + H2O --> OH - + BH+

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Lack of moisture :)

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Most molecules that contain carbon are _____?

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Most molecules containing carbon are organic. All organic compounds, from basic elements through complex living creatures, contain some degree of carbon, which is one of the most basic components of any organic molecule.

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3 years ago

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A car is traveling 83.3 kilometers per hour. What is its speed in miles per minute? One kilometer = 0.62 miles.

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First convert the number from kilometer to miles:
$83.3*0.62$
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Now to find the miles per minutes,divide the miles per hours by 60 (the amount of minutes in an hour.)

$51.646/60$
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The car is travelling at a speed of 0.860766667 miles/minute.

Hope this helps.
-Benjamin

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