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3 years ago

URGENT: Identify the subatomic particles that determine the atomic number of an element.

Chemistry

1 answer:

Sedbober [7]3 years ago

8 0

Answer:

the number of protons determines the atomic number

Explanation:

Ex. Aluminum has 13 protons, so it's atomic number is 13

hope this helps :)

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Draw the product or products that are obtained from the reaction of HCl with 1-butene and with 2-butene. Show the relative stere

Bezzdna [24]

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3 years ago

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zzz [600]

The answer is B. Flammability

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4 years ago

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The vapor pressure of water at 50.0 c is 12.33 kpa. What is this value in millimeters of mercury?

kramer

Answer:

<u>92.48 mmHg</u>

Explanation:

You need the conversion factor to convert the value of 12.33 kPa to milimiters of mercury, mmHg.

The converstion factors are looked at tables, which today you can find in internet.

Since the conversions between kPa and atm and between atm and mmHg are more widely known, I will show the conversion using those relations:

1 atm = 101.325 kPa

1 atm = 760 mmHg

⇒ 101.325 kPa = 760 mmHg

Then, dividing both sides by 101.325 kPa you get the conversion factor:

1 = 760 mmHg / 101.325 kPa

Now, multiply 12.33 kPa by that conversion factor:

12.33 kPa × 760 mmHg / 101.325 kPa = 92.48 mmHg ← answer

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3 years ago

the perimeter of a isosceles is 48 meters. the upper base is 12 meters shorter than the lower base x.each leg is 12 meters short

mrs_skeptik [129]

Squares have equal sides
12/4=3

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3 years ago

Classify these substances. More than one answer may apply in each case.

enyata [817]

Answer: $H_2$ : Pure substance, Element

$O_2$ : Pure substance , Element

$H_2O$ : Pure substance, Compound

Explanation:

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: $H-2$ and $O_2$

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: $H_2O$

Heterogeneous Mixture : Mixture that has its different components mixed unevenly within the substance . Example: Air

Homogeneous Mixture : Mixture that has its different components mixed evenly within the substance. Example: sugar dissolved in water

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4 years ago