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3 years ago

13

Choose one of the monosaccharide that gave a positive Benedict's test. Write the chemical reaction equation for that positive Be

nedict's test showing how the structure of the monosaccharide changed during the test.

1 answer:

ruslelena [56]3 years ago

4 0

Find the answer your self dude

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If you want to increase the gravitational force between two objects, what would you do

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There are two things that could be done. The first is to increase the mass of the objects. The second is to decrease the distance between the center of masses of the objects.

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4 years ago

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Chemical symbol for an atom of lithium

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Answer:

Li

Explanation:

It's on the periodic table.

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4 years ago

What makes an atom a good conductor?

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4 years ago

At a wastewater treatment plant, FeCl3(s) is added to remove excess phosphate from the effluent. Assume the following reactions

RoseWind [281]

Answer : The concentration of $Fe^{3+}$ needed is, $2.37\times 10^4M$

Explanation :

First we have to calculate the mole of phosphate.

As we are given that, 1 mg P/L that means, 1 mg of phosphate present in 1 L of solution.

$\text{Moles of phosphate}=\frac{\text{Mass of phosphate}}{\text{Molar mass of phosphate}}$

Molar mass of phosphate = 94.97 g/mole

$\text{Moles of phosphate}=\frac{1mg}{94.97g/mol}=\frac{0.001g}{94.97g/mol}=1.053\times 10^{-5}mol$

Now we have to calculate the concentration of phosphate.

$\text{Concentration of phosphate}=\frac{\text{Moles of phosphate}}{\text{Volume of solution}}$

$\text{Concentration of phosphate}=\frac{1.053\times 10^{-5}mol}{1L}=1.053\times 10^{-5}mol/L$

Now we have to calculate the concentration of $Fe^{3+}$ .

The second equilibrium reaction is,

$FePO_4\rightleftharpoons Fe^{3+}+PO_4^{3-}$

The solubility constant expression for this reaction is:

$K_{sp}=[Fe^{3+}][PO_4^{3-}]$

Given: $K_{sp}=\frac{1}{4}$

$\frac{1}{4}=[Fe^{3+}]\times 1.053\times 10^{-5}mol/L$

$[Fe^{3+}]=2.37\times 10^4M$

Thus, the concentration of $Fe^{3+}$ needed is, $2.37\times 10^4M$

8 0

4 years ago

a 15.0 L tank of gas is contained at a high pressure of 8.20*10^4. The tank is opened and the gas expands into an empty chamber

Nostrana [21]

Answer:

$P_2=20.5$

Explanation:

Assuming that temperature is constant

According to Boyle's Law, at constant temperature pressure is inversly proportional to the volume and mathematically it can be expressed as:

$P_1V_1 = P_2V_2$ ..........1

$P_1=8.2 \times 10^4$

$P_2=?$

$V_1=15L$

$V_2=6.00 \times 10^4L$

from the first equation after putting all the value

we get,

$P_2=20.5$

8 0

3 years ago