1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
fomenos
3 years ago
15

A solution is prepared by dissolving 50.4 gg sucrose (C12H22O11C12H22O11) in 0.332 kgkg of water. The final volume of the soluti

on is 355 mLmL. For this solution, calculate the molarity.
Chemistry
1 answer:
elena-s [515]3 years ago
4 0

Answer:

The correct answer is 0.41 M

Explanation:

The molarity of a solution is given by the number of moles of solute per liter of solution.

Molarity= moles solute/1 L solution= mol/L

First we need the molecular weight (Mw) of sucrose in order to convert the mass of sucrose (in g) to mol. We can quickly calculate this from the molar mass (MM) of the elements C, H and O in Periodic Table:

Mw sucrose (C₁₂H₂₂O₁₁)= (12 x MM C) +(22 x MM H) + (11 x MM O)= (12 x 12 g/mol)+(22 x 1 g/mol) + (11 x 16 g/mol)= 342 g/mol

Then, we divide the mass of sucrose (50.4 g) into the molecular weight of sucrose to obtain the number of moles and this is divided into the volume of the solution (355 ml). We convert ml to L taking into account that 1000 ml= 1L:

50.4 g sucrose x 1 mol/342 g sucrose x 1/355 ml x 1000 ml/1 L= 0.415 mol/L= 0.41 M

You might be interested in
An unknown compound is processed using elemental analysis and found to contain 117.4g of platinum 28.91 carbon and 33.71g nitrog
dlinn [17]

Answer:

1 mole of platinum

Explanation:

To obtain the number of mole(s) of platinum present, we need to determine the empirical formula for the compound.

The empirical formula for the compound can be obtained as follow:

Platinum (Pt) = 117.4 g

Carbon (C) = 28.91 g

Nitrogen (N) = 33.71 g

Divide by their molar mass

Pt = 117.4 / 195 = 0.602

C = 28.91 / 12 = 2.409

N = 33.71 / 14 = 2.408

Divide by the smallest

Pt = 0.602 / 0.602 = 1

C = 2.409 / 0.602 = 4

N = 2.408 / 0.602 = 4

The empirical formula for the compound is PtC₄N₄ => Pt(CN)₄

From the formula of the compound (i.e Pt(CN)₄), we can see clearly that the compound contains 1 mole of platinum.

8 0
3 years ago
What is the Lewis structure for Iodide?
jasenka [17]

Answer:

In the Lewis structure for IF5 you'll need to put a total of 12 valence electrons on the Iodine atom in order to draw the Lewis structure. Remember that Iodine (I) can hold more than eight valence electrons. For the IF5 Lewis structure, calculate the total number of valence electrons for the IF5 molecule

Explanation:

<em> I be knowing hope this helps</em>

5 0
2 years ago
You wish to construct a buffer of pH=7.0. Which of the following weak acids (w/ corresponding conjugate base) would you select?
Alex17521 [72]

Answer:

C.) HOCl Ka=3.5x10^-8

Explanation:

In order to a construct a buffer of pH= 7.0 we need to find the pKa values of all the acids given below

we Know that

pKa= -log(Ka)

therefore

A) pKa of  HClO2 = -log(1.2 x 10^-2)

=1.9208

B) similarly PKa of HF= -log(7.2 x 1 0^-4)= 2.7644

C)  pKa of HOCl= -log(3.5 x 1 0^-8)= 7.45

D) pKa of HCN = -log(4 x 1 0^-10)=  9.3979

If we consider the  Henderson- Hasselbalch equation for the calculation of the pH of the buffer solution

The weak acid for making the buffer must have a pKa value near to the desired pH of the weak acid.

So, near to value, pH=7.0. , the only option is HOCl whose pKa value is 7.45.

Hence, HOCl will be chosen for buffer construction.

3 0
3 years ago
Convert 59,800 cg/L to g/mL
alexgriva [62]
To convert the given value to the desired one, use the proper unit conversions and dimensional analysis. Use the following conversion for the first set.

    1 g = 100 cg
    1 L = 1000 mL

Using the concept presented above,
         
            V = (59800 cg/L)(1 g/100 cg)1 L/1000 mL)
            V = 0.598 g/mL
6 0
3 years ago
What continent has no deserts
nevsk [136]

Answer:

Antarctica.

Explanation:

It’s all ice.

4 0
3 years ago
Other questions:
  • A factory at a low elevation ships bags of popcorn to cities at high elevations. Why does the factory manager need to monitor th
    15·2 answers
  • If the temperature of a liquid increases the rate of evaporation will do what?
    5·1 answer
  • Polar bonds
    8·1 answer
  • What is the change in electrons for nitrogen in the following reaction?
    11·2 answers
  • Which color has the longest wavelength?
    12·1 answer
  • In an endothermic reaction what is true of the enthalpy
    6·1 answer
  • What is the pressure of a mixture of nitrogen (N2) and oxygen (O2) if partial pressure of N2 is 594 mm Hg and the partial pressu
    10·1 answer
  • The bottom number on the periodic table is called?
    14·1 answer
  • Bonding Story Mini Project
    14·1 answer
  • 0.965g of iodine was shaken with a mixture of 50cm3 trichloromethane and 50cm3 of water in the separating funnel until equilibri
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!