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Maurinko [17]
3 years ago
8

Methanol (CH3OH) is an organic solvent with a boiling point of 64.5°C. How many grams of mercury(II) bromide (HgBr2, MM = 360.4)

must be dissolved in 542.6 of methanol if the solution has a boiling point of 66.0? The Kb for methanol is 0.86 °C/molal. Assume ideal behavior. (+6 points for submitted work) Your Answer: Answer units​
Chemistry
1 answer:
Softa [21]3 years ago
3 0

Answer:

What is the formula for elevation in boiling point?

Explanation:

The elevation in boiling point (ΔTb) is proportional to the concentration of the solute in the solution. It can be calculated via the following equation. Where, i is the Van't Hoff factor.

...

Boiling Point Elevation Formula.

Solvent Kb value (in oC.kg.mol-1)

Chloroform 3.63

Benzene 2.53

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givi [52]

Answer:

Neils Bohr determined that electrons inhabit distinct energy levels.

Explanation:

7 0
3 years ago
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How many moles of mercury (II) oxide are needed to produce 65.00 g of mercury?
natima [27]

Answer:

the moles of mercury are nHg = 65/201

HgO --------> Hg + 1/2O2

65/201 65/201

=> the moles of HgO are 65/201 mol

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3 years ago
8. Based on the formula, predict whether each of the following compounds is primarily ionic or primarily covalent. a. sodium iod
Lina20 [59]

primarily ionic  include = sodium iodide( NaI) ,   calcium chloride  ( CaCl2)


primarily covalent    include  - Ammonia (NH3) , Methane ( CH4)  and  

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Explanation

ionic  bond  is formed  when  there is complete transfer of electron between atoms. It occur  between metal  which  donate electrons and  a  non  metal which accept  electrons.

 for  example  in  formation  of CaCl2,   ca  donate  2 electron to 2  Cl atom, while  2 Cl atom accept the 2  electrons  to form ionic bond.

 Covalent bond  is formed  when two or  more  non  metal  form bond by sharing  electrons pairs.

For  example in NH3   3 pairs of electron are shared.  to form covalent bond.

                               

8 0
3 years ago
What are watts and how do they work
ipn [44]
A watt is a unit of power.
4 0
3 years ago
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A zinc block with a mass of 230 g is given 1320 J of energy. What is the change in
Mariana [72]

Answer:

14.7°C

Explanation:

Q = m·ΔT·c

ΔT = \frac{Q}{m*c}

ΔT =\frac{1320 J}{230 g* 0.39 J/gC}

     = 1320 J / ((230 g) * (.39 J/g°C)

ΔT = 14.7 °C      

4 0
3 years ago
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