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mars1129 [50]
3 years ago
8

What mass of Na2CO3 is required to create 750 mL of an aqueous solution where the concentration of the carbonate (CO3-2) ions is

1.75 M? (assume complete dissociation)
Chemistry
1 answer:
Julli [10]3 years ago
8 0

Answer:

139.11 grams

Explanation:

The molarity (M) is equal to m (moles) /L (liters).

Notice how it is in mL so converting it would be 0.75 L (750*10-3)

Now plug in the information

1.75=m/0.75

m=1.3125

Now m is in moles so convert to grams to get the mass

1.3125 mol Na2CO3 * 105.9888 g Na2CO3 = 139.1103

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True or false, The ideal gas lead allows us to figure out a fourth variable about a gas when the other 3 are given
klemol [59]

Answer:

true

Explanation:

PV=nRT

The ideal gas law states that PV = NkT, where P is the absolute pressure of a gas, V is the volume it occupies, N is the number of atoms and molecules in the gas, and T is its absolute temperature. The constant R is called the Boltzmann constant

4 0
3 years ago
A container of what volume would be required to store 60.0 moles of a gas at a pressure of 20.0 atm and a temperature of 50.0 Ce
belka [17]

Answer:

The answer to your question is:  79.6 L

Explanation:

Data:

n = 60 moles

Pressure = P = 20.0 atm

Temperature = T = 50°C

Volume = V = ?

Convert temperature to Kelvin

      °K = 273 + 50

      °K = 323

Formula  (ideal gas law)

               PV = nRT        solve for V

              V = nRT / P

             V = (60)(0.08206)(323) / 20        Substitution

            V = 1590.32 /20                    

             V = 79.6 L

               

7 0
4 years ago
The roots of a plant help to anchor the plant to soil, and are also used for food storage and water extraction. Roots are made u
11111nata11111 [884]

Answer;

Cells, Organism.

Explanation:

Roots are made up of tissues, such as xylem, phloem, and pith. In which level of organization would the roots of a plant most likely be classified as?

4 0
3 years ago
Please help. i don’t get what to do
Scrat [10]

I think you were doing it right. Just find something in your kitchen and google the chemical formula. And from that you can see the elements in it. For example:

Salt, NaCl, Sodium and Chlorine.

Baking Soda, NaHCO3, Sodium, Hydrogen, Carbon and Oxygen.

Vinegar, CH3COOH, Carbon, Hydrogen and Oxygen


3 0
4 years ago
When an aqueous solution of sodium phosphate (Na3PO4) and an aqueous solution of magnesium sulfate (MgSO4) are mixed, a precipit
Akimi4 [234]

Answer: The chemical formula of this precipitate is Mg_{3}(PO_{4})_{2}.

Explanation:

An equation which depicts the chemical reaction of substances in the form of chemical formulas is called a chemical equation.

For example, chemical equation for an aqueous solution of sodium phosphate (Na_{3}PO_{4}) and an aqueous solution of magnesium sulfate (MgSO_{4}) are mixed, a precipitate forms is as follows.

3MgSO_{4}(aq) + 2Na_{3}PO_{4}(aq) \rightarrow Mg_{3}(PO_{4})_{2}(s) + 3Na_{2}SO_{4}(aq)

Here, trimagnesium phosphate is the precipitate. The chemical formula of this precipitate is Mg_{3}(PO_{4})_{2}.

Thus, we can conclude that the chemical formula of this precipitate is Mg_{3}(PO_{4})_{2}.

8 0
3 years ago
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