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tigry1 [53]
3 years ago
7

How many atoms of phosphorus are in 8.10 mol of copper(II) phosphate?

Chemistry
1 answer:
Dvinal [7]3 years ago
5 0
Cu3(PO4)2 is the chemical name
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A student needed to make 100.0 mL of 0.20M NaOH solution. How many grams of sodium hydroxide does the student need to weigh out
GuDViN [60]

Answer:

0.08 g

Explanation:

100.0 mL = 0.10 L

Multiply the volume by the molarity to find moles.

0.10 L × 0.20 M = 0.002 mol

Convert moles to grams.

0.002 mol × 40 g/mol = 0.08 g

4 0
4 years ago
The true absorbance for a 1.0 x 10 −5 M solution is 0.7526. If the percentage stray light for a spectrophotometer is 0.56%, calc
Korvikt [17]

Answer:

The percentage deviation is  \Delta M = 1.87%

Explanation:

From the question we are told that  

     The concentration is of the solution is C = 1.0*10^{-5} M

     The true absorbance A = 0.7526

      The percentage of transmittance due to stray light z = 0.56% =\frac{0.56}{100}  = 0.0056

Generally Absorbance is mathematically represented as

           A = -log T

Where T is  the percentage of true transmittance

    Substituting value  

          0.7526 = - log T

              T = 10^{-0.7526}

                  = 0.177

                  = 17.7%

The Apparent absorbance is mathematically represented

           A_p = -log (T +z)

Substituting values

           A_p = -log(0.177 + 0.0056)

                = -log(0.1826)

               = 0.7385

The percentage by which apparent absorbance deviates from known absorbance is mathematically evaluated as

       \Delta A = \frac{A -A_p}{A} * \frac{100}{1}

              = \frac{0.7526 - 0.7385}{0.7526} * \frac{100}{1}

             \Delta A = 1.87%  

Since Absorbance varies directly with concentration the percentage deviation of the apparent concentration from know concentration  is

              \Delta M = 1.87%

           

6 0
4 years ago
The following is a carbohydrates,lipid,protein or nucleic acid:Wax
Rasek [7]
A wax is a type of lipid. Waxes are nonpolar, so they are not soluble in water.
3 0
3 years ago
Help pls i really need help
MaRussiya [10]

Answer: I think it's 1

Explanation: Potential energy means stored energy . In Position 1 it's not moving the energy is being stored. Hope that helps.

6 0
3 years ago
Read 2 more answers
Which three main elements make up the structure of organic molecules?
AleksAgata [21]
Carbohydrates, nucleic acids and proteins
8 0
3 years ago
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