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Sever21 [200]
3 years ago
12

All of the following are classified as acids except

Chemistry
1 answer:
Neporo4naja [7]3 years ago
7 0
I think D im not completely sure  
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A vehicle travels at the same speed from point a to point b then from point b to point a. which statement is correct?
ss7ja [257]
D would be the answer.
Hope this helps
8 0
3 years ago
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If the temperature of the earth's layers increases by about 90 degrees fahrenheit for every 1 mile from the surface and you are
bogdanovich [222]
The rate of change of the temperature of the Earth's surface is given to,
                                       90°F/mile
To determine the temperature x miles away from the surface, we multiply the depth by the given rate. This will give us the answer of,
                                  T = (90°F/mile)(90 mile)
                                      = 8100°F
Thus, the temperature 90 miles deep in the Earth's surface is equal to 8100°F. 
4 0
3 years ago
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Calculate the weight percent of ascorbic acid in a tablet of Vitamin C from the following data:A 80 mg sample of a crushed Vitam
Lina20 [59]

Answer:

The Answer is 88%

Explanation:

The balanced ionic equation of the reaction

   IO^{3- }+ 8 I^- + 6 H^+ => 3 I^{3- }+ 3 H_2O

  I^{3-} + 2 S_2O_3^{2-} => 3 I^- + S_4O_6^{2-}

 

  C_6H_8O_6 + I^{3- }+ H_2O => C_6H_6O_6 + 3 I^- + 2 H^+

Looking at the above reactions

   The original number of moles of I^{3-} = 3 × number of moles of IO^{3-}

                                                                = 3 × volume × concentration of KIO_3

Note: The formula for number of moles is volume × concentration

                                                                =3 * \frac{40}{1000} *  0.00653 =0.000784 mol

The number of moles of I^{3-} left after its reaction with ascorbic  acid

                         = \frac{1}{2} x moles of S_2O_3^{2-}

                          = \frac{1}{2} x volume x concentration of    S_2O_3^{2-}

                          = \frac{1}{2}  * \frac{15}{1000} * 0.0510 =0.000383 \ mol

Note: The division by 1000 is to convert mill liter to liter

                             Moles of ascorbic acid = moles of I^{3-} reacted

                           = initial \ moles \ of \  I^{3-} \ - remaining \ moles \ of \ I^{3-}

                           =0.000784 - 0.000383

                          =0.000401 \ mols

              Mass =  moles \ * molar \ mass

Hence

              Mass of ascorbic acid = moles of ascorbic acid × molar mass of ascorbic acid

                                                      = 0.000401* 176.12 = 0.07055\ g

                                                      = 70.55\  mg

 Weight% of ascorbic acid = mass of ascorbic acid/mass of sample x 100%

                                             = 70.55/80  × 100%

                                              = 88.1%

                       

3 0
4 years ago
A chemist determined by measurements that 0.0650 moles of gallium participated in a chemica reaction. Calculate the mass of gall
frosja888 [35]

Answer:

4.53gm

Explanation: n=m/M

n is # of moles

m is mass

M is molar mass

so m=n*M when you rearrange the equation

7 0
3 years ago
Select the correct answer.
Lunna [17]

Answer:

B or C

Explanation:

I'm not very sure sorry

6 0
4 years ago
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