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Anna007 [38]
3 years ago
14

Two 2 1/2 inch plastic strips and two 5 1/3 inch plastic stripa are used to form arectengale what is the perimter of the rectang

le
Chemistry
1 answer:
Ymorist [56]3 years ago
7 0

Answer:The perimeter of the rectangle is \frac{47}{3} inch or 15.66 inch.

Explanation:

Length of strip (I) = 2\frac{1}{2} inch=\frac{5}{2}inch

Length of strip (II) = 5\frac{1}{3} inch=\frac{16}{3} inch

According to question two strips of length 1 inch and two strips of lenght \frac{5}{3} inch is used in making rectangle:

Perimeter of rectangle = Sum of all sides of rectangle

Perimeter of rectangle =\frac{5}{2} inch+\frac{5}{2} inch +\frac{16}{3} inch+\frac{16}{3} inch=\frac{47}{3} inch

The perimeter of the rectangle is \frac{47}{3} inch or 15.66 inch.

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If 7.50 g of the unknown compound contained 0.250 mol of C and 0.500 mol of H, how many moles of oxygen, O, were in the sample?
lisov135 [29]

Answer:  0.25 moles O in the sample

Explanation:

0.250 moles:   C = (0.250 moles)*(12 g/mole) = 3 grams C

0.500 moles H:  H = (0.500 moles)*(1 g/mole) = 0.5 grams H

Total mass is 7.5g

Subtract C and H to find grams O  (7.5 g -(3 grams C + 0.5 grams H) = 4.0 grams O.  Molar mass of O is 16 grams/mole.

Moles O = 0.25 O in the sample

The empirical formula is C1H2O1,  possibly formalhyde.

3 0
3 years ago
Molecular bromine is 24 percent dissociated at 1600 k and 1.00 bar in the equilibrium br2 (
dlinn [17]
Br2 == 2Br

24% dissociated => n total moles, 0.24 mol*n of Br, and 0.76*n mol of Br2

=> partial pressure of Br, P Br = 0.24 bar, and
     partical pressure of Br2, P Br2 = 0.76 bar

kp = (P Br)^2 / P Br2 = (0.24)^2 / 0.76 = 0.0758


3 0
3 years ago
What specifically determines how much energy is available in a molecular
HACTEHA [7]

C  The number and types of bonds within the molecule.

Explanation:

In a molecule, the number and types of bonds present determines the amount of available energy therein.

When bonds are broken or formed, energy is usually released.

  • Elements combine with one another in order to attain stability in this state.
  • Through this process, they form bonds by attraction.
  • Where atoms exchange their valence electrons by losing or gaining it, electrovalent bonds form.
  • In covalent molecules, electrons are usually shared between atoms.
  • An attraction result from this type of interaction.
  • The bond formed stores energy in the process.
  • When bonds are broken, energy is usually released. The energy accrues when the bond was being formed.
  • In molecules, we have covalent bond.

Learn more:

Bond brainly.com/question/7213980

Covalent bonds brainly.com/question/5258547

#learnwithBrainly

4 0
4 years ago
1. Find the molarity of 25g of sodium hydroxide dissolved in 1L of water. Identify the solute and solvent in this solution.
wolverine [178]

Answer:

.6250 M

The Sodium Hydroxide is the solute, and the water is the solvent.

Explanation:

mol/volume= Molarity

(25/22.99+16+1.008)/1=.6250 M.

6 0
3 years ago
Daniel Harris has always enjoyed eating tuna fish. Unfortunately, a study of the mercury content of canned tuna in 2010 found th
meriva
That would be 3 days 6 oz of tuna
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