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Lady_Fox [76]
3 years ago
10

How many nitrogen atoms are in one molecule of the compound Al(NH 3 ) 2 ?

Mathematics
1 answer:
jarptica [38.1K]3 years ago
5 0

The answer is 2 nitrogen atoms

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Hello!
avanturin [10]

Answer:

  • 7.71 km²

Step-by-step explanation:

<u>Area of triangle:</u>

  • A = 1/2bh

We have the value of b but not h.

Added auxiliary segments which help to find the value of h.

<em>See attached for details</em>

  • sin 40° = h/4
  • h = 4 sin 40°
  • h = 2.57 km

<u>The area is:</u>

  • A = 1/2*6*2.57 = 7.71 km²

6 0
2 years ago
Read 2 more answers
Determine whether the statement is true or false. if it is false, rewrite it as a true statement. using a systematic sample guar
Sphinxa [80]

The given statement is false as using stratified sampling guarantees that members of each group within a population will be sampled.

As given in the question,

Systematic sampling guarantees that members of each group within a population will be sampled is a false statement.

  • Systematic sampling represents the probability of sampling method based on the group formed at regular intervals.
  • Stratified sampling guarantees each subgroup within the population receives proper representation.

Therefore, the given statement is false as using stratified sampling guarantees that members of each group within a population will be sampled.

Learn more about sampling here

brainly.com/question/13287171

#SPJ4

7 0
1 year ago
How do I solve u=vw+z, for v.
AVprozaik [17]
U = vw + z

vw + z = u    |subtract z from both sides

vw = u - z    |divide both sides by w

v = (u - z)/w
3 0
3 years ago
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A water tank can be filled by an inlet pipe in 6 6 hours. it takes 4 4 times as long for the outlet pipe to empty the tank. how
enot [183]
To fill:
6 hours  = 1 tank
1 hour = 1/6 tank

To drain:
It takes 4 times as long, therefore 4 x 6 = 24
24 hours = 1 tank
1hour = 1/24 tank

If both pipes are open 
1 hour = 1/6 - 1/24 = 1/8 tank
1/8 tank = 1 hour
8/8 tank = 1 x 8 hour
1full tank = 8 hours
3 0
3 years ago
Write (x-4y) ^2 as a polynomial
ELEN [110]
(x - 4y)²
(x - 4y)(x - 4y)
x(x - 4y) - 4y(x - 4y)
x(x) - x(4y) - 4y(x) + 4y(4y)
x² - 4xy - 4xy + 16y²
x² - 8xy + 16y²
4 0
3 years ago
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