How can a sea cave become a sea arch?

The average daily diet of an adult woman is 2.4×103kcal. the molar mass of atp is 507 g/mole. part a if all the energy in her di

mezya [45]

To answer this question, we should give the standard free energy change of ATP to ADP conversion that is equal to 30.5 kJ/mol ATP. In this case, 2400 kcal is equal to 10041. 6 kJ. Hence, the mol of ATP produced is 329.23 mol ATP or equal to 166.93 kg ATP.

3 0

3 years ago

The average cup of coffee contains about 125 mg of caffeine, C8H10N4O2. Caffeine is also found in tea, colas, and headache remed

Rashid [163]

Answer:

The answer to your question is 194 g

Explanation:

Molecular mass is the sum of all the masses of the atoms that form a molecule.

In the problem, we have C₈H₁₀N₄O₂ which means

atomic mass number of atoms total

Carbon 12 8 12 x 8 = 96

Hydrogen 1 10 1 x 10 = 10

Nitrogen 14 4 14 x 4 = 56

Oxygen 16 2 16 x 2 = 32

194 g

8 0

3 years ago

Which of the following is an oxidation-reduction reaction? Which of the following is an oxidation-reduction reaction? Ba(C2H3O2)

DochEvi [55]

Answer:

The only oxidation- reduction reaction is Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2

Explanation:

An oxidation-reduction reaction is a chemical reaction that involves an electron transfer between two species. This will lead to a change in oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

Some atoms have different possible oxidation numbers.

H has oxidation number +1

O has oxidation number -2

The oxidation number of an individual atom is 0.

The total oxidation number of all atoms in: a neutral species is 0 and in an ion is equal to the ion charge.

⇒ Ba(C2H3O2)2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaC2H3O2

(C2H3O2)2 has an oxidation number of -2. So Ba has an oxidation number of +2

In BaSO4 has SO4 an oxidation number of -2 and Ba has an oxidation number of +2

This means Ba doesn't change its oxidation number.

In Na2SO4 Na has an oxidation of +1; in NaC2H3O2 Na has an oxidation of +1

This means Na doesn't change its oxidation number.

⇒ Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2

Cu has an oxidation number of 0

In Cu(NO3)2, NO3 has an oxidation number of -1 so Cu has an oxidation number of +2

In 2AgNO3, NO3 has an oxidation number of -1 so Ag has an oxidation number of +1

Ag has an oxidation number of 0

⇒ HCl (aq) + NaOH (aq) → H2O (l) + NaCl

The oxidation number of Cl and Na do not change

⇒ AgNO3 (aq) + HCl (aq) → AgCl (s) + HNO3

In AgNO3 Ag has an oxidation number of +1

In AgCl Ag has an oxidation number of +1

In HCl Cl has an oxidation number of -1

In AgCl Cl has an oxidation number of +1

The oxidation number of Cl and Ag do not change

⇒ H2CO3 (aq) + Ca(NO3)2 (aq) → 2HNO3 (aq) + CaCO3 (s)

In Ca(NO3)2 Ca has an oxidation number of +2

In CaCO3 Ca has an oxidation number of +2

In Ca(NO3)2 N has an oxidation number of +5

In HNO3 N has an oxidation number of +5

In H2CO3 C has an oxidation number of +4

In CaCO3 C has an oxidation number of +4

The only oxidation- reduction reaction is Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2

Oxidizing agent: Ag ; Reducing agent: Cu

4 0

3 years ago

It has been determined that the body can generate 5500 kJ of energy during one hour of strenuous exercise. Perspiration is the b

CaHeK987 [17]

Answer:

4.88 kg

Explanation:

Amount of energy generated in 1 hour of exercise = 5500 kJ

Thus,

Amount of energy generated in 2 hours of exercise = 5500*2 kJ

So,

Amount of energy generated in 2 hours of exercise = 11000 kJ

Heat of vaporization of water = 40.6 kJ/mol

40.6 kJ of energy is required to vaporize 1 mole of water

Also,

11000 kJ of energy is required to vaporize (1/40.6) * 11000 mole of water

Moles of water = 270.936 moles

Molar mass of water = 18 g/mol

Mass = Moles * Molar mass = 270.936 * 18 g = 4876.8473 g

Also,

1 g = 0.001 kg

So, mass of water = 4.88 kg

7 0

4 years ago

Be sure to answer all parts. identify and label the species in each reaction. (a) nh4+(aq) + h2o(l) ⇌ nh3(aq) + h3o+(aq) acid ba

quester [9]

A)

NH⁴⁺(aq) + H₂O(l) ⇌ NH₃(aq) + H₃0⁺(aq)

- acid a species that able to donate (H+): NH⁴⁺
- base a species that is able to accept a proton (H+): H₂O
- conjugate base a species formed when acid donates a proton (H+): NH₃
- conjugate acid a species formed by a base accepts a proton (H+): H₃0⁺

b)

CN⁻(aq) + H₂O(l) ⇌ HCN(aq) + OH⁻(aq)

- base a species that is able to accept a proton (H+): CN⁻
- acid a species that able to donate (H+): H₂O
- conjugate acid a species formed by a base accepts a proton (H+): HCN
- conjugate base a species formed when acid donates a proton (H+): OH⁻

5 0

4 years ago