Answer:
Explanation:
40/ 180.2 x (-16 / 1 mole glucose)=-3.6 KJ
is the energy of the surroundings increases for any chemical reactoin supported by the first law of thermodynamics
Yes, the increase in surrounding energy for any chemical reaction is supported by the first law of thermodynamics, which means that the total energy in the universe is constant.
Thermodynamics is the branch of science concerned with the study of heat changes in various chemical processes. There are four basic laws of thermodynamics named zeroth law, first law, second law, and third law which represents all changes in reaction.
The first law of thermodynamics states that "energy cannot be created or destroyed in a chemical reaction, but can be converted from one form to another", and if a system loses energy in the process, it can gain some through the environment.
It simply changes from one form to another, so the total energy of the universe is conserved.
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Complete question:
Is the energy of the surroundings increases for any chemical reaction supported by the first law of thermodynamics?
Which of the following species is amphoteric? Answer HPO42- CO32- HF NH4 None of the above are amphoteric
Among the given species, the only one that is amphoteric is the carbonate ion, CO₃²⁻.
What are amphoteric species ?Amphoteric species are chemical species that can act as both an acid and a base. This means that they can donate or accept a proton (H⁺) depending on the conditions of the reaction. For example, water (H₂O) is an amphoteric molecule because it can act as an acid when it donates a proton to a strong base, such as hydroxide ion (OH⁻), to form the hydronium ion (H₃O⁻). Water can also act as a base when it accepts a proton from a strong acid, such as hydronium ion, to form the hydroxide ion.
Among the given species, the only one that is amphoteric is the carbonate ion, CO₃²⁻. This is because it can accept a proton (H⁺) to form bicarbonate ion (HCO₃⁻) in the presence of a strong acid, or it can donate a proton to a strong base to form the hydrogencarbonate ion (HCO₃⁻).
The others are not amphoteric species. HPO₄²⁻ is a conjugate base of a weak acid ( H₂PO₄⁻), which means it can only act as a base. HF is a weak acid and can act as an acid but not a base. NH₄⁺ is a weak acid and can act as an acid, but not a base.
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consider the following reaction: compound 5.69 205.0 213.6 what is the standard free energy of the reaction at ?
The standard free energy of the reaction at 23.0 °C is -394.4 kJ/mol, which can be calculated using the Gibbs free energy equation and substituting the given values for standard enthalpy change, standard entropy change, and temperature in Kelvin.
To find the standard free energy of the reaction at 23.0 °C, we can use the Gibbs free energy equation:
ΔG° = ΔH° - TΔS°
where ΔH° is the standard enthalpy change, ΔS° is the standard entropy change, T is the temperature in Kelvin, and ΔG° is the standard free energy change.
First, we need to convert the temperature to Kelvin:
T = 23.0 + 273.15 = 296.15 K
Next, we can substitute the values given in the question:
ΔH° = -393.5 kJ/mol
ΔS° = (213.6 J/K/mol) - [(5.69 J/K/mol) + (205.0 J/K/mol)] = 2.91 J/K/mol
T = 296.15 K
ΔG° = (-393.5 kJ/mol) - (296.15 K)(2.91 J/K/mol)
ΔG° = -393.5 kJ/mol - 862.25 J/mol
ΔG° = -394.4 kJ/mol
Therefore, the standard free energy of the reaction at 23.0 °C is -394.4 kJ/mol.
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What is the bond angle of carbonothioyl dibromide
Also what is the molecular shape
Answer:
Carbonothioyl dibromide, also known as CBr2S, has a bond angle of approximately 109.5 degrees, which is the typical tetrahedral bond angle for molecules with sp3 hybridization.
The molecular shape of CBr2S is also tetrahedral, with the two bromine atoms and the sulfur atom arranged at the corners of a tetrahedron, and the carbon atom at the center.
FILL IN THE BLANK bone cells called _______ break down bone by secreting hydrochloric acid and enzymes that dissolve the matrix.
Bone cells called osteoclasts break down bone by secreting hydrochloric acid and enzymes that dissolve the matrix.
Bone cells called osteoclasts break down bone by secreting hydrochloric acid and enzymes that dissolve the matrix.
A type of bone cell called an osteoclast degrades bone tissue. This function is essential for the upkeep, restoration, and remodelling of the vertebral skeleton's bones. By secreting acid and a collagenase, the osteoclast breaks down and digests the composite of hydrated protein and mineral at the molecular level, a process known as bone resorption. The blood calcium level is likewise regulated by this process.
Osteoclasts are multinucleated cells that originate from white blood cells of the monocyte/macrophage family. They are the cells responsible for the breakdown of bone (osteolysis) during normal bone growth and maintenance processes. Osteoclasts are critical for bone remodeling and maintenance, as they resorb and dissolve mineralized bone tissue, releasing calcium and other ions into the bloodstream.
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Determine the pressure (in atm) of a 7.16-g sample of He gas at 692 K in a container with a volume of 55.9 L.
Answer:
1.82 atm
Explanation:
Ideal gas law
P=nRT/V
1) solve for n which is moles
7.16 / 4 = 1.79 mole He
2)
n=1.79
R=0.0821
T=692 K
V=55.9
P=1.79 X 0.0821 X 692 / 55.9 =1.82 atm
The titration of 45.0 ml of an unknown triprotic acid required 32.71 ml of 0.37 M KOH to
reach the endpoint. What is the molarity of the unknown acid?
The molarity of the unknown triprotic acid is 0.269M.
How to calculate molarity?Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.
The molarity of the unknown acid can be calculated using the following formula:
CaVa = CbVb
Where;
Ca and Va = acid concentration and volume respectivelyCb and Vb = base concentration and volume respectivelyAccording to this question, the titration of 45.0 ml of an unknown triprotic acid required 32.71 ml of 0.37 M KOH to reach the endpoint.
45 × Ca = 32.71 × 0.37
45Ca = 12.1027
Ca = 0.269M
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How many oxygen atoms are I one molecule of serotonin
Answer:
There are no oxygen atoms in one molecule of serotonin. Serotonin (5-hydroxytryptamine) is a monoamine neurotransmitter that is composed of carbon, hydrogen, and nitrogen atoms. Its chemical formula is C10H12N2O.
Explanation:
Answer:1 atom
Explanation: it’s at the end of the molecule
300 ml of nitrogen react with 300 ml of hydrogen to form ammonia. N₂ + 3H₂ ---> 2NH3 What volume of ammonia will be formed, if the reaction gets over at the same temperature? a) 100 ml b) 200 ml c)300 ml d) 400 ml
Answer:
According to the balanced chemical equation for the reaction:
N₂ + 3H₂ → 2NH₃
1 volume of nitrogen (N₂) reacts with 3 volumes of hydrogen (H₂) to form 2 volumes of ammonia (NH₃) at the same temperature and pressure.
Therefore, if 300 ml of nitrogen (N₂) reacts with 300 ml of hydrogen (H₂), the limiting reactant will be hydrogen, since it is present in the smallest amount. To find the volume of ammonia (NH₃) formed, we can use the volume ratio from the balanced chemical equation:
1 volume of N₂ + 3 volumes of H₂ → 2 volumes of NH₃
Since we have 300 ml of H₂, which is equivalent to 3 volumes of H₂, the maximum volume of ammonia (NH₃) that can be formed is:
2 volumes of NH₃ = 300 ml of H₂ × (2 volumes of NH₃ / 3 volumes of H₂) = 200 ml
Therefore, the correct option is (b) 200 ml.