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lozanna [386]
2 years ago
13

Population from the phylogenetic tree?

Chemistry
1 answer:
bogdanovich [222]2 years ago
4 0
Mark Brainliest please

Answer :

In my opinion , answer is A
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Calculate the molarity of an aqueous solution of sodium chloride , NaCl with molality of 13.76m and density of 1.03gmL-1.
Zanzabum

Answer:

Find the domain and the range of the following:

x y

3 2

5 7

1 4

9 2

3 7

Explanation:

8 0
3 years ago
Help ASAP!!!!!!!!!!!!!!!!!!!!!!!!!
BartSMP [9]

Answer:

ok      .

Explanation:            

3 0
3 years ago
How many grams of O2 are needed to react with 18.2 g of NH3?
erastova [34]

Answer:

44 g oxygen are needed.

Explanation:

Given data:

Mass of oxygen needed = ?

Mass of ammonia = 18.2 g

Solution:

Chemical equation:

4NH₃ + 5O₂   →  4NO + 6H₂O

Now we will calculate the number of moles of ammonia:

Number of moles = mass/molar mass

Number of moles = 18.2 g/ 17 g/mol

Number of moles = 1.1 mol

Now we will compare the moles of ammonia with oxygen from balance chemical equation.

                        NH₃              :                O₂

                          4                 :                 5

                          1.1                :              5/4×1.1 = 1.375 mol

Mass of oxygen needed:

Mass = number of moles × molar mass

Mass = 1.375 mol × 32 g/mol

Mass = 44 g

4 0
3 years ago
Jason ran 5/7 of the distance around the school track sara ran 4/5 of Jason distance what fraction of the total distance around
FrozenT [24]
Let x represent the total distance around the track
Jason's distance: (5/7)x
Sara ran (4/5) of Jason's distance,
so she ran (4/5)*(5/7)x = (4/7)x
Sara ran 4/7 of the total distance
7 0
3 years ago
The melting points and boiling points of 4 substances are shown.
Serggg [28]

Answer:

it's

C. with melting point 11° C and boiling point 181° C

Explanation:

i hope you got it

4 0
3 years ago
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