Many breads arc made by adding yeast to dough, causing the dough to rise. Yeast is a type of microorganism that produces the catalyst zymase, which converts glucose, C6H12O6' to ethanol and carbon dioxide gas. The balanced equation for this reaction is shown below.C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g)

73 Draw a structural formula for the ethanol formed during this reaction.
74 Describe how the catalyst, zymase, speeds up this reaction.
75 Determine the total mass of ethanol produced when 270. grams of glucose reacts completely to form ethanol and 132 grams of carbon dioxide.

Answers

Answer 1

Answer: 73. Ethanol has 2 carbons connected to each other. One carbon has 3 H attached and the other atom has 2 H attached and an -OH attachment
H H
l l
H - C - C - OH
l l
H H

74. Activation energy is lowered.
75. Note: MW glucose is 180g/mol ; MW ethanol is 46 g/mol; there is 2 moles of ethanol produced by one mole of glucose.

g glucose= 270 glucose (1mol/180g)(2mole ethanol/1mol glucose)(46g/mol)= 138 g ethanol

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Which substance is an electrolyte
1) CCl4
2)SiO2
3)C6H12O6
4) H2SO4

Answers

The substance that has been acting as an electrolyte from the given molecules is sulfuric acid. Thus, option 4 is correct.

Electrolytes have been defined as the chemical substances that has been dissociated into constituent ions when dissolved in the aqueous solution.

Identifying electrolytes

The ionic compounds are bounded by weak intermolecular forces and are dissociated into ions in the solution. Thus, the compounds are given as electrolytes.

The covalent bonded molecular atoms are not dissociated into ions and are not considered as electrolytes.

The substance that has been acting as an electrolyte from the given molecules is sulfuric acid. Thus, option 4 is correct.

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Electrolyte is any species which when dissolved in solvent particularly water dissociates into cations and anions. Electrolytes are conductors of electricity. In given options;

CCl₄ (Tetrachloromethane) is a covalent compound. And it doesn't dissociate to any cation or anion. So it is not electrolyte.

SiO₂ (Silicon Dioxide) is also covalent in nature and exist in giant framework. It is not electrolyte.

Glucose (C₆H₁₂O₆) is also covalent compound. And doesn't produced any ion in water, hence it is not electrolyte.

H₂SO₄ (Sulfuric acid) is Electrolyte. When it is dissolved in water it produces H⁺ and SO₄²⁻ ions as follow,

H₂SO₄ → 2 H⁺ ₍aq₎ + SO₄²⁻ ₍aq₎

Result:
H₂SO₄ is electrolyte.

The mass of 2 cm3 of gold is 38.6 grams. find the density of the gold. Could you please help me??

Answers

Density = Mass / Volume
so, Density of gold = 38.6/2 = 19.3

An atom that is electrically neutral containsa. more electrons than protons.
b. more neutrons than electrons.
c. an equal number of neutrons and protons.
d. an equal number of protons and electrons.

Answers

D. I wouldn't bother much with B and C since neutron doesn't necessarily has to be in the picture. So, why D? reasons being, an atom will not be electrically neutral if it exists as an ion. In other words, the no. of electrons have to be the same with the no. of protons.

Given the formula:The bond between which two atoms has the greatest degree of polarity?
A. C and C
B. C and O
C. H and C
D. H and O

Answers

The bond between hydrogen and oxygen has the greatest degree of polarity as there is wide electronegativity difference between the atoms.

What is an atom?

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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I would say D because oxygen is a highly electronegative atom and the OH b bonding is known to have high levels of polarity for example H-O-H in water. This is why alcohols are miscible in water eventhough they are mostly non-polar.

The CH bond is more likely to be non-polar as it is with alot of hydrocarbons.

What do the formulas for table salt, NaCl, and water, H2O indicate about the compounds?

Answers

The formulas indicate the number of elements in each compound. Notice the difference in ratios:
NaCl is 1:1, while H2O is 2:1.

James is preparing three solutions of salt water. Each of the solutions has the same amount of water in the beaker and a different amounts of salt. In the first beaker, there is one scoop of salt in the beaker. The second beaker has two scoops of salt. The third beaker has three scoops of salt. Which of the beakers is the most concentrated solution?

Answers

the third beaker: since it has the most amount of salt and the same amount of water as all the other beakers . So it has the highest concentrated amount :)

Answer: the beaker 3

Explanation: that what it said on usatestprep

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