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lesya [120]
3 years ago
11

A pressure of 760.0 mm hg is equal to

Chemistry
1 answer:
evablogger [386]3 years ago
8 0

Answer:

760=101325

Explanation:

for an opproximate result,multiply the pressure value by 133

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6 How many moles are in a 321 g sample of magnesium?
Tatiana [17]

Answer:

13.4mol of Mg

Explanation:

Given parameters:

Mass of magnesium = 321g

Unknown:

Number of moles  = ?

Solution:

The number of moles of a substance is given as;

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

 Molar mass of Mg = 24g/mol

 Insert the parameters and solve;

        Number of moles  = \frac{321}{24}   = 13.4mol of Mg

3 0
2 years ago
Which of these mixtures is a suspension?
natita [175]

Answer:

D. apple juice

Explanation:

8 0
2 years ago
In solid NaCl, the equilibrium separation between neighboring Na+ and Cl- ions is 0.283 nm. Calculate the coulombic energy betwe
const2013 [10]

Explanation:

It is given that r = 0.283 nm. As 1 nm = 10^{-9} m.

Hence, 0.283 nm = 0.283 \times 10^{-9} m

  • Formula for coulombic energy is as follows.

             U_{coulomb} = -1.748 \frac{e^{2}}{4 \pi \epsilon_{o} r}

where,   e = 1.6 \times 10^{-19} C

            \epsilon_{o} = 8.85 \times 10^{-12}

          U_{coulomb} = -1.748 \frac{(1.6 \times 10^{-19}^{2}}{4 \times 3.14 \times 8.85 \times 10^{-12} \times 0.283 \times 10^{-9}}

                         = 1.423 \times 10^{-18} J

  • As 1 eV = 1.6 \times 10^{-19} J

So,       1 J = \frac{1 eV}{1.6 \times 10^{-19}}

Hence,    U = \frac{1.423 \times 10^{-18} J}{1.6 \times 10^{-19} J}

                   = 8.9 eV

  • Also,   1 J = \frac{10^{-3} kJ}{6.022 \times 10^{23}mol}

                = 1.67 \times 10^{-27} kJ/mol

Therefore, U = 1.423 \times 10^{-18} J \times 1.67 \times 10^{-27} kJ/mol

                     = 2.37 \times 10^{-45} kJ/mol

7 0
3 years ago
Please answer fast, shouldn't take long to do ^-^ (will give brainliest)
Anna [14]

Answer:

B

Explanation:

5 0
3 years ago
Which solid conducts electricity most efficiently?
irina1246 [14]

We see that is the <em>structure </em>of graphite it possess these attributes.

Graphite

Option A

<h3>Electricity</h3>

Generally, he conduction of electricity is do by elements with free talent electron after bonding.

Therefore, it is save to say that the <em>solid </em>that possess the attributes that allows for conduction will end up conducting.

Hence, we see that is the <em>structure </em>of graphite it possess these attributes.

Graphite

Option A

For more information on Electricity visit

brainly.com/question/9383604

4 0
2 years ago
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