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3 years ago

A sample of gas contains 6.25 × 10-3 mol in a 500.0 mL flask at 265°C.

Chemistry

1 answer:

garik1379 [7]3 years ago

8 0

Answer:

The pressure of gas in kilopascals is 55.9

Explanation:

variables given :

volume

temperature

moles

unknown variables :

pressure

Select the correct algebraic form for the equation to be used for this calculation.

p= nRT/V

Solve the problem for the pressure of oxygen.

Answer:

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Balance the following equations 1.Na+HCI=NaCI+H2 2.Mg+O2=MgO

liberstina [14]

Answer:

1. 2Na + 2HCl = 2NaCl =H2

2. 2Mg + O2 = 2MgO

Explanation:

make sure that the number of atoms of each element is the same on each side of the equation

1. 2Na + 2HCl = 2NaCl =H2

on LHS of equation,

Na = 2

H = 2

Cl =2

On RHS of equation,

Na=2

H= 2

Cl =2

2. 2Mg + O2 = 2MgO

on LHS of equation,

Mg = 2

O2 = 2

On RHS of equation,

Mg = 2

O2 = 2

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3 years ago

Atoms of one element change into atoms of another element during chemical equations

Wewaii [24]

True is the answer yw

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3 years ago

What volume, in mL, of concentrated 16 M nitric acid would you need to use in order to prepare 500.0 mL of a 0.250 M HNO3(aq) so

shtirl [24]

Given :

Initial concentration of nitric acid, $C_1 = 16\ M$ .

Final concentration of nitric acid, $C_2 = 0.250 \ M$ .

Volume of $HNO_3$ , $V _2= 500\ mL = 0.5\ L .$

To Find :

Volume needed( $V_1$ ).

Solution :

We know,

$C_1V_1 =C_2V_2\\\\16 \times V_1 = 0.250 \times 0.5 \\\\V_1 = \dfrac{0.250 \times 0.5}{16}\\\\V_1 = 0.0078125\ L = 7.8125 \ mL$

Hence, this is the required solution.

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3 years ago

Draw the lewis structure of hcn. include lone pairs.

Rina8888 [55]

The Lewis structure of the hydrogen cyanide molecule is represented by the image shown.

<h3>What is the Lewis structure?</h3>

We know that the Lewis structure is showing us the relationship between the electrons pairs in the compound and its overall properties. The Lewis structure consists of the symbol of the element and the electrons pairs that surround the atom.

We can see that in hydrogen cyanide there is a nitrogen atom and there is a hydrogn atom and also one carbon atom. The bond between carbon and nitrogen is covalent while the bond between hydrogen and the cyanide moiety is covalent.

Learn more about Lewis structure:brainly.com/question/20300458

#SPJ1

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1 year ago

"would you expect to find sodium chloride in underground rock deposits as a solid, liquid, or gas? explain."

Sophie [7]

A sodium chloride is like most of the ionic compounds existing here on earth in which they are composed of having a high melting point and by this, if found in underground rock deposits, they are usually in a form of solid.

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3 years ago