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Gre4nikov [31]
3 years ago
9

What is a species?

Chemistry
1 answer:
Nesterboy [21]3 years ago
7 0

Answer:a group of organisms that can reproduce and have fertile offspring

the process by which inherited traits in a population change over

generations

Explanation:

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Answer the following questions:
Lynna [10]
The relationship of radiation with distance obeys the inverse square law. Therefore, doubling the distance decrease the radiation by a factor of 4. The new count is 250.
1) Applying the same principle, the count decreases by a factor of 100. The new count is 10
2) An alpha particle is 4He2 and the Hydrogen can be represented as 1H1
14N7 + 4He2 - 1H1
= 17X8
Proton number 8 belongs to Oxygen. Therefore, the resultant nucleus is:
17O8
3) 185Au79 - 4He2
= 181Ir77
4) X - 4He2 = 234Th90
X = 238U92
5) Beta emission results in the same nucleon number but an increase in the proton number; therefore, the result is:
234Pa91
7 0
3 years ago
What is the overall charge of an atom? Explain why
Zepler [3.9K]

Answer:

atoms have no overall charge. this is because they contain equal numbers of positive protons and negative electrons

4 0
2 years ago
How many moles of oxygen are prosent in 169 of oxygen gas?​
slamgirl [31]

Answer:

Number of moles=Mass/ Molar Mass 169g÷32g/mol= 5.281 mol

6 0
3 years ago
Read 2 more answers
The heat of vaporization of carbon tetrachloride (CCl4) is 197.8 J/g. How much energy is absorbed by 1.35 mol CCl4 when it vapor
const2013 [10]

Energy absorbed from changing the phase of a substance from the liquid phase to gas phase can be calculated by using the specific latent heat of vaporization. Calculation are as follows:

 

<span> Energy = 1.35 mol  CCl4 ( 153.81 g / 1 mol ) x 197.8 J/g </span>

 

<span>Energy = 41071.88 J</span>

5 0
3 years ago
Read 2 more answers
Nitrogen dioxide and water react to produce nitric acid, HNO3,
maw [93]

Answer:

Explanation:

a )

3NO₂(g) + H₂O(l) — -→ 2HNO₃(aq) + NO(g)

3 x 46 g       18 g            2 x 63 g       30 g

138 g of NO₂ requires 18 g of H₂O

28 g of NO₂ requires ( 18 / 138) x 28

= 3.65 g of H₂O.

b )

18 g of H₂O produces 30 g of NO gas

15.8 g of H₂O produces ( 30/18 ) x 15.8

= 26.33 g of NO gas .

c )

138 g of NO₂ produces 126 g of HNO₃

8.25 g  of NO₂ produces (126 / 138 ) x 8.25

= 7.53 g of HNO₃

7 0
2 years ago
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