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mezya [45]
3 years ago
10

A Question Pre

Chemistry
2 answers:
lana66690 [7]3 years ago
7 0

Answer:

A present

Explanation:

Because if the facts

VMariaS [17]3 years ago
5 0

Answer:

Seal them in a glass container in an atmosphere of argon (Ar) gas.

Explanation:

chem

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What is the molarity of a solution that contains 1000.0 mg of AgNO3 that has been dissolved in 500 mL of water
Vaselesa [24]

0.012moldm⁻³

Explanation:

Given parameters:

Mass of AgNO₃  = 1000mg

Volume of water = 500mL

Unknown:

Molarity of solution  = ?

Solution:

The molarity of a solution is the number of moles of a solute dissolved in volume of solvent.

 Molarity = \frac{xnumber of moles}{Volume}

 

Number of moles of AgNO₃  = ?

   Number of moles = \frac{mass}{molar mass}

Molar mass of AgNO₃ = 108 + 14 + 3(16) = 170g/mol

   convert mass to g;

      1000mg = 1g

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   convert the given volume to dm³;

       1000mL  = 1dm³;

        500mL = 0.5dm³

Now solve;

  Molarity = \frac{0.00588}{0.5}  = 0.012moldm⁻³

learn more:

Molarity brainly.com/question/9324116

#learnwithBrainly

4 0
3 years ago
Help please. 15.0 moles of gas are in a 3.00L tank at 23.4∘C . Calculate the difference in pressure between methane and an ideal
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Using PV=nRT or the ideal gas equation, we substitute n= 15.0 moles of gas, V= 3.00L, R equal to 0.0821 L atm/ mol K and T= 296.55 K and get P equal to 121.73 atm. The Van der waals equation is (P + n^2a/V^2)*(V-nb) = nRT.  Substituting  a=2.300L2⋅atm/mol2 and b=0.0430 L/mol, P is equal to 97.57 atm. The difference is <span>121.73 atm- 97.57 atm equal to 24.16 atm.</span>
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3 years ago
A complexometric titration can also be used to determine the amount of calcium in milk. The calcium concentration in milk is typ
Morgarella [4.7K]

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d

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6 0
3 years ago
Suppose a mercury thermometer contains 3.250g of mercury and has a capillary that is 0.180mm in diameter.. How far does the merc
Helga [31]
1) You need to get volume of both temperatures by using first attached formula V= Mass/DensityV_1 = (3.250 g)/(13.596 g/(cm^3)) = .2390 cm^3&#10;At 25 degrees C (V_2e have:&#10;&#10;V_2  = (3.250 g)/(13.534 g/(cm^3)) = .2401 cm^3

2) Using the second formula you get the height of 0 degree 
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(radius in cm is (0.180 mm) / 2 * (1 cm)/(10 mm) or .009 cm

3) Then with h1 you can easily get the height of 25 degrees 
h_2 =(.2401 cm^3)/(pi*(.009 cm)^2) = 943.5 cm

 Subtract 943.5 cm - 939.2 cm, and obtain a rise in mercury height of 4.3 cm

5 0
3 years ago
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Advantages and disadvantages of using tidal energy instead of non-renewable energy sources.​
Phantasy [73]

Advantages of using tidal energy:

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-A highly predictable energy source

-High energy density

-Operational and maintenance costs are low

-An inexhaustible source of energy

Disadvantages of using tidal energy:

-High tidal power plant construction costs.

-Negative influence on marine life forms.

-Location limits.

-The variable intensity of sea waves.

3 0
3 years ago
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