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slega [8]
3 years ago
11

The world produces about 3.9 billion tons of food every year. Of that amount, approximately 2.6 billion tons is consumed each ye

ar. The rest is wasted. What percentage of food is wasted every year? Choose the closest answer.
a.30%
b.33.33%
c.60%
d.66.66%
Chemistry
2 answers:
pentagon [3]3 years ago
6 0
B. Without a doubt,
(3.9-2.6)÷3.9
=33.3333...
≈33.33%
nika2105 [10]3 years ago
4 0

B.  33.33%                                                                                                                                                  hope this helps


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Ammonia and oxygen react to form nitrogen monoxide and water. Construct your own balanced equation to determine the amount of NO
stiv31 [10]

Answer:

NO would form 65.7 g.

H₂O would form 59.13 g.

Explanation:

Given data:

Moles of NH₃ = 2.19

Moles of O₂ = 4.93

Mass of NO produced = ?

Mass of  produced H₂O = ?

Solution:

First of all we will write the balance chemical equation,

4NH₃ + 5O₂   →   4NO + 6H₂O

Now we will compare the moles of NO and H₂O with ammonia from balanced chemical equation:

NH₃  :   NO                                   NH₃  :   H₂O

4     :    4                                          4    :      6

2.19   :    2.19                                 2.19  : 6/4 × 2.19 = 3.285 mol

Now we will compare the moles of NO and H₂O with oxygen from balanced chemical equation:

O₂  :   NO                                               O₂ :   H₂O

5     :    4                                                  5     :    6

4.93   :   4/5×4.93 = 3.944 mol               4.93  : 6/5 × 4.93 = 5.916 mol

we can see that moles of water and nitrogen monoxide produced from the ammonia are less, so ammonia will be limiting reactant and will limit the product yield.

Mass of water = number of  moles × molar mass

Mass of water = 3.285 mol × 18 g/mol

Mass of water = 59.13 g

Mass of nitrogen monoxide  = number of  moles × molar mass

Mass of nitrogen monoxide = 2.19 mol × 30 g/mol

Mass of nitrogen monoxide = 65.7 g

4 0
2 years ago
Compare and contrast the elements Potassium, K, and Neon, Ne. Use at least ten comparisons or descriptions.
vovikov84 [41]

Answer:

K is a group 1 element while Ne is a group 0 element

K is a good reducing agent while Ne is inert

K is metal while Ne is a gas

K has one valence electron while Ne has no valence electron

Explanation:

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2 years ago
Match each term with the correct location on a trophic pyramid.
zubka84 [21]

Answer:

I think it's C

hope this helps

6 0
2 years ago
What are the various ways in which an atom of an element can achieve the noble gas configuration ? ​
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Answer:

<h3><em>Atoms attain noble gas configuration </em><em> by obtaining or donating and sharing of electrons present in their outermost shell.</em><em> </em></h3>
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How could an alpha particle pass straight through the metal foil and strike the center of the phosphor screen on the other side
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