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777dan777 [17]
3 years ago
12

The teacher in item 10 also needs to order plastic tubing. If each of the 60 students need 750 mm of tubing, what length of tubi

ng in meters should the teacher order?
Chemistry
1 answer:
Alex777 [14]3 years ago
6 0

45 m. If each student needs 750 mm of tubing, the teacher should order 45 m of tubing.

a) Find the <em>length in millimetres</em>

Length = 60 students x (750 mm tubing/1 student) = 45 000 mm tubing

b) Convert <em>millimetres to metres </em>

Length = 45 000 mm tubing x (1 m tubing/1000 mm tubing) = 45 m tubing

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2. A chemical analysis of a sample provides the following elemental data:
Vadim26 [7]

Answer:

C3 H6 O2

Explanation:

first divide their mass by their respective molar mass, we get:

30.4 moles of C

61.2 moles of H

20.25 moles of O

now divide everyone by the smallest one of them then we get

C= 1.5

H= 3

O= 1

since our answer of C is not near to any whole number so we will multiply all of them by 2

so,

C3 H6 O2 is our answer

3 0
2 years ago
If 20 grams of N2 react completely with H2 , how many moles of NH3 are produced? Show Work
Maslowich
This is the balanced eq
N2 + 3H2 -> 2NH3
first you need to find mole of N2 by using
mol = mass ÷ molar mass.
mol N2= 20g ÷ (14.01×2)g/mol
=0.7138mol
then look at the coefficient between H2 and NH3.
it is N2:NH3
1:2
0.7138:0.7138×2
0.7138:1.4276 moles
moles of NH3 = 1.4276 moles
5 0
4 years ago
What were the limition of doberiner classifacation​
alexgriva [62]

Answer: I don’t kno

Explanation:

5 0
3 years ago
An earthquake's____<br> located directly above its_____
Kipish [7]

Answer:

An earthquake's <u>what happens when two blocks of the earth suddenly slip past one another. </u>

located directly above its <u>The epic Center </u>

Explanation:

<h2>Hope this helps you !! </h2>
6 0
2 years ago
If 0.98 moles of BaCl2 are dissolved in enough water to make a 1.2-liter solution, what is the resulting molarity?
Svetradugi [14.3K]
<span>Correct Answer: <u>Option B i.e. 0.82 M </u>

Reason:
<em>Given:</em> number of moles of BaCl2 = 0.98, Volume of solution = 1.2 l

Molarity of solution = </span>\frac{\text{number of moles}}{\text{volume of solution (l)}}<span>
                               = </span>\frac{0.98}{1.21}<span>
                               = 0.82 M

 Thus, molarity of the solution is 0.82 M</span>
4 0
3 years ago
Read 2 more answers
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