All categories

3 years ago

3) What is the mass of a sample consisting of 1.00 X 1022 formula units of MgSO.?(

Chemistry

1 answer:

Montano1993 [528]3 years ago

4 0

number of moles = 1.00 X 10^22 ÷ 6.022 × 10^23

= 0.0166 moles

mass = number of moles × molar mass

= 0.0166 × 120.37 = 2.00 g

You might be interested in

Below is a short reaction sequence. Provide the structure of the two missing organic compounds.

dimaraw [331]

The product of this reaction is a halohydrin as shown here.

<h3>What are the products?</h3>

We have a reaction that first involves the formation an alkene as the bases are used on the first substrate. The alkene that is thus created is now able to react with the bromine in water.

The first step of the reaction is where the multiple bond is created and this multiple bond is what can now go on to participate in a chemical reaction in the next step of the process of reaction as shown in the image.

Bromine in water is also hat we call bromine water. This bromine water is able to add across a double bond and when that happen we will have a saturated compound. This could also be regarded as halohydrin reaction.

Recall that the first step of the reaction of the alkene with bromine is the formation of a dibromide via the brominium intermediate. This is now followed by reaction with water to form the halohydrin product.

Learn more about organic reaction:brainly.com/question/9585105

#SPJ1

4 0

2 years ago

Which Scientists’ observations eventually led to the theory of continental drift?

Vitek1552 [10]

Alfred Wegener

Explanation:

Alfred Wegener in 1912, proposed the theory of continental drift from his careful studies of different land masses. From his observations, he suggested the following:

Some fossils of tropical plants were found in polar and temperate regions.
Fossils of mesosaurus were found in South America and South Africa now separated by the Atlantic ocean.
He fitted the continents into a giant land mass puzzles.
Coal beds in Europe were similar to those in United States.
Mountain chains in the edge of West Africa was similar to that of Eastern part of South America.

His theory lacked a mechanism which facilitated the plate movement.

Learn more:

Wegener brainly.com/question/5002949

#learnwithBrainly

8 0

4 years ago

The mass spectrum of an organic compound shows the relative abundances of M to be 34.76% and M 1 to be 2.632%. Assuming the peak

alukav5142 [94]

The number of carbon atoms present in any compound is equal to seven.

<h3>How do we calculate the number of carbon atoms?</h3>

Number of carbon atoms present in any compound will be calculated by using the following equation:

No. of Carbon atoms = Relative intensity of M+1 peak / Natural abundance of C13

Intensity of molecular peak = 34.76%

Intensity of M+1 peak = 2.632%

Relative intensity of M+1 peak = (100/34.76)×2.632 = 7.57%

Given that natural abundance of M+1 = 1.07%

On putting values on above equation, we get

No. of C atoms = 7.57 / 1.07 = 7.07 = 7 (approx)

Hence number of carbon atoms is 7.

To know more about mass spectrum, visit the below link:

brainly.com/question/17368088

#SPJ1

7 0

3 years ago

G determine the concentration of an hbr solution if a 45.00 ml aliquot of the solution yields 0.6485 g agbr when added to a solu

Sunny_sXe [5.5K]

The molecular weight of silver bromide (AgBr) is 187.77 g/mole. The presence of the ions in solution can be shown as- AgBr (insoluble) ⇄ $Ag^{+}$ + $Br^{-1}$ .

45.00 mL of the aliquot contains 0.6485 g of AgBr. Thus 1000 mL of the aliquot contains $\frac{0.6485}{45}$ ×1000 = 14.411 gm-mole. Thus the solubility product $K_{sp}$ of AgBr = [ $Ag^{+}$ ]× $Br^{-}$ .