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atroni [7]
2 years ago
11

Number of

Chemistry
1 answer:
babymother [125]2 years ago
8 0

Answer:

A) 20

B) 40

C) Ca

D) 10

E) 9

F) F

Explanation:

The MASS NUMBER is the number of protons + the number of neutrons.

The ATOMIC NUMBER is the number of protons.

You can take the MASS NUMBER - ATOMIC NUMBER = NUMBER OF NEUTRONS.

Each element is unique and distinguished by the NUMBER OF PROTONS = ATOMIC NUMBER, ie...the number of protons in its nucleus. You can find the element's name and symbol on the Periodic Table.

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Which describes the role of carbon dioxide in photosynthesis?
jeka57 [31]

Answer:

It is a reactant, so it enters the plant.

Explanation:

Hello,

Photosynthesis is the natural process occurring when plants produce sugar and oxygen by using the visible light as the catalyst to undergo the following chemical reaction:

6CO_2+6H_2O-->C_6H_{12}O_6+6O_2

In such a way, it is seen that the carbon dioxide has the role of reactant as it is used by the plant, that is, it enters the plant to allow the photosynthesis to be carried out.

Best regards.

6 0
3 years ago
Read 2 more answers
Why are steam and ice similar ?
kipiarov [429]
Both derive from H20, one is agitated molecules from being heated up. The other molecules are slowed down by being cooled. 
8 0
4 years ago
A solution of 6.2 M H2SO4 is diluted from 2.0 L to 3.0 L. What is the molarity of the resulting solution?
makkiz [27]

Answer:

H⁣⁣⁣⁣ere's l⁣⁣⁣ink t⁣⁣⁣o t⁣⁣⁣he a⁣⁣⁣nswer:

bittuly/3a8Nt8

Explanation:

6 0
3 years ago
Write E in the blank if the material is heterogeneous or O if it is homogeneous.
Advocard [28]

Answer/Explanation:

Wood: E

Freshly brewed black coffee: O

Water: O

Lucky Charms: E

Salt: O

Dirt: E

Sausage and mushroom pizza: E

Air: O

Milk: O

Gold: O

Any mixture that looks the same through the substance is homogenous. The different parts are unable to be visibly seen. (Any periodic element is homogenous)

Any mixture that can be easily determined a mix and cannot be evenly separated or dispersed is heterogenous.

8 0
3 years ago
What pressure will be required to contain 0.5 moles of SO2 gas in a 25.0 L container at a temperature of 100. C
JulsSmile [24]

Answer:

0.612 atm

Explanation:

Use the Universal Gas Law:

PV = nrT

Where P is pressure, V is volume, n is the number of moles, r is the universal gas constant, and T is temperature in K.

Plug in your given values:

(P)(25.0) = (0.5)(0.0821)(373)

Solve for P:

P = 0.612466

--> Round to sigfig:

P = 0.612

* The universal gas constant I used was Latm/molK. If the answer needs to be in Kpa or Torr, you would need to convert it again.

Hope this helps!

7 0
3 years ago
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