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2 years ago

Type of molecule is shown below? H O=C H

Chemistry

1 answer:

ololo11 [35]2 years ago

6 0

Answer:

Carbonyl

Explanation:

While the diagram is slightly unclear, the molecule most likely being shown is a carbonyl. A molecule is a carbonyl when there is a carbon double-bonded to an oxygen.

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How many grams of sodium benzoate, C H CO Na, have to be added to 1.50 L of a 0.0200 M solution of benzoic acid, C H CO H, to ma

Dmitrij [34]

Answer: 2.8275grams

Explanation: A buffer is made btw a weak acid and it salt. In a solution made by dissolving a weak acid in solution, equilibrium is set up btw ionised and unionised ion. For Benzoic acid

C6H5COOH....> C6H5COO- + H+

Ka = [C6H5COO-] [H+]/ [C6H5COOH].......(1)

using Ka = 6.5× 10^-5, [C6H5COOH] = 0.02M. PH= - log[H+] ....> [H+]= 10^-4M.

Putting the values in(1)

[C6H5COO-]= 6.5× 10^-5 × 0.02/ 10^-4

[C6H5COO-] = 0.013M = Molarity of sodium benzoate

Mole(C6H5COONa) = 0.013 × Volume = 0.013mol/litre × 1.5 litre

Mole(C6H5COONa) = 0.0195mol

Mass(C6H5COONa) = 0.0195 × Molar mass

Mass(C6H5COONa) = 2.8275g

4 0

4 years ago

Dissolving potassium chlorate (KClO3) is even more endothermic than potassium chloride.

zhenek [66]

Answer:

The mass of KClO₃ that will absorb the same heat as 5 g of KCl is 3.424 g

Explanation:

Here we have

Heat of solution of KClO₃ = + 41.38 kJ/mol.

Heat of solution of KCl (+17.24 kJ/mol)

Therefore, 1 mole of KCl absorbs +17.24 kJ during dissolution

Molar mass of KCl = 74.5513 g/mol

Molar mass of KClO₃ = 122.55 g/mol

74.5513 g of KCl absorbs +17.24 kJ during dissolution, therefore, 5 g will absorb

$\frac{17.24}{74.5513 } \times 5 \, \, kJ \, or \, 1.156 \, kJ$

Therefore the amount of KClO₃ to be dissolved to absorb 1.156 kJ of energy is given by

122.55 g of KClO₃ absorbs + 41.38 kJ, therefore,

$\frac{1.156}{41.38} \times 122.55 \, g = 3.424 \, g$

Therefore the mass of KClO₃ that will absorb the same heat as 5 g of KCl = 3.424 g.

5 0

3 years ago

What is the Bohr model for Sodium?

Sonbull [250]

Column tells you how many valence electrons there are

Row tells you how many layers (circles)

Sodium (Na) has 1 valence electron

Sodium (Na) is the 3rd row so there's 3 circles

Has 11 total electrons

Bohr models show ALL ELECTRONS

The first shell can only hold 2 electrons

Every shell after that can hold 8.

So the first shell has 2 electrons, second one has 8 electrons, and the third one has 1.

2 + 8 + 1 = 11

4 0

3 years ago

ATP is a source of free energy that drives unfavorable reactions. Which of the processes are coupled to the dephosphorylation of

EleoNora [17]

Answer:

The correct statements are a denovo anabolism of nucleotides d myosin action during muscle contraction e membrane transport that maintain levels in the cell.

Explanation:

ATP or adenosine tri phosphate is an high energy compound.The hydrolysis of ATP helps to drive many thermo dynamically unfavorable reaction.The processes which are coupled to the de phosphorylation of ATP are given below.

1 De novo synthesis of nucleotides that requires energy in form of ATP.

2 During muscle contraction the sliding of thick filaments or myosin over thin filament or actin requires energy derived from the hydrolysis of ATP.

3 Membrane transport basically active transport helps in the uphill transport of ions that requires free energy in form of ATP.

3 0

3 years ago

How many moles of hydrogen molecules (h2) would be required to produce two moles of hydrogen peroxide (h2o2)?

SashulF [63]

Their should be two molecules of hydrogen (h2) to produce 2 moles of h2O2

3 0

4 years ago