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serious [3.7K]
4 years ago
7

C

Chemistry
1 answer:
Montano1993 [528]4 years ago
6 0

i) KMnO4

lets calculate using x method

1+x+ 4(-2) = 0

1+x-8 =0

x= 7

ii)MnO4‐

x+4(-2) = -1

x-8 = -1

x = 7

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Arrange the forms of electromagnetic radiation in order of decreasing energy (from highest energy to lowest energy). You are cur
solmaris [256]

Answer:

gamma rays > X-rays > ultraviolet radiation > visible light > infrared > radio waves.

Explanation:

Electromagnetic waves are those waves that require no material medium for propagation. They can travel through space and they all move at the speed of light.

Electromagnetic waves are composed of both electric and magnetic fields which are mutually at right angles to each other.

The order of decreasing energy of electromagnetic waves is;

gamma rays > X-rays > ultraviolet radiation > visible light > infrared > radio waves.

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3 years ago
In a hospital, oxygen is administered to patients at 3.0 atm in a hyperbaric oxygen chamber. Oxygen gas, measuring 600.0 L, is c
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3 years ago
A can of soda at 27oC (mass of 310g) is placed in a freezer with a temperature of -14oC. How much energy must be removed for the
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4 0
3 years ago
How many grams of NaCl are required to make 150.0mL of a 5.000 m solution
Yanka [14]

The  number of  grams of NaCl  required  to make 150.0 ml of a 5.000m solution  is  43.875  grams


<u><em>calculation</em></u>

Step 1:  calculate  moles of NaCl

moles=  molarity x  volume in liters

volume in liters =  150.0  ml/1000= 0.15  l

moles is=  5.000mol/l  x0.15  l  =0.75  moles


Step2 :  find  mass

mass=  moles  x molar  mass

molar mass  of NaCl= 23 +35.5 = 58.5  g/mol

mass= 0.75  moles x58.5 g/mol = 43.875 grams

6 0
4 years ago
Calculate the molarity of 0.060 moles NaHCO3 in 1500. mL of solution
Jobisdone [24]

Answer:

= 0.4 M

Explanation:

data:

moles = 0.060 moles

volume = 1500 ml

             = 1500 / 1000

              = 1.5 dm^3

solution;

      molarity = \frac{no. of moles}{volume in dm^3}

                    = 0.060 / 1.5

         molarity  = 0.4 M

5 0
2 years ago
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