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AveGali [126]
3 years ago
9

If photosynthesizing green algae are provided with CO2 containing heavy oxygen (18O), subsequent analysis will show that 18O is

absent from which of the following molecules produced by the algae?
A) 02
B) glyceraldehyde 3-phosphate (G3P)
C) glucose
D) ribulose bisphosphate (RuBP)
Chemistry
1 answer:
pogonyaev3 years ago
8 0

Answer: A. O2

Explanation:

If photosynthesizing green algae are provided with CO2 containing heavy oxygen (18O), subsequent analysis will show that 18O first appears then 3-phosphoglycerate molecule produced by the algae.

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Click on the Delta H changes sign whan a process is reversed button within the activity and analyze the relationship between the
andreev551 [17]

Answer:

ΔH = 1270kJ

Explanation:

Let's consider the following thermochemical equation.

B(s) + 3/2 O₂(g) → B₂O₃(s), ΔH = −1270kJ

Since ΔH < 0, this reaction is exothermic. According to the Lavoisier-Laplace law, if we reverse a reaction, its enthalpy will have the same value and opposite sign than the direct reaction.

B₂O₃(s) → B(s) + 3/2 O₂(g), ΔH = 1270kJ

For the inverse reaction, ΔH > 0, which means that it is endothermic.

6 0
4 years ago
ASAP PLLEEASE HURYYYYYYYYYYRRRRRRRRRRRRYY (NO FILES FOR ME NEEDING TO DOWNLAOD PLEASE!)
pickupchik [31]

Answer:

1.Fill in the blank with the correct term to make the statement true.

During the (night)

at the beach, the land cools down

(slower)

than the

(ocean).

Because of this, the air over the land is

(Warmer) than the air over the ocean. The

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dense air rises over the ocean and the cooler,

(More)

dense air blows in from over the land creating a

(sea)

breeze.

2.Which statement is true about winds?

Winds always blow from low to high pressure.

true

Winds always blow from water to land.

false

Winds always blow from land to water.

false

3. Winds always blow from high to low pressure. How do landmasses impact the movement of air and water?

They stop all movement of both air and water.

They speed up the air and water and allow it to pass though.

They change the direction and slow them down.

think this is it

They slow down the air but speed up the water.

pt:2

answering the pictures

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15-B

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Explanation:

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3 0
3 years ago
Read 2 more answers
If 5.48 g of CuNO3 is dissolved in water to make a 0.840 M solution, what is the volume of the solution in milliliters?
Ainat [17]

Answer:

34.8 mL

Explanation:

First we <u>convert 5.48 g of CuNO₃ into moles</u>, using its<em> molar mass</em>:

  • 5.48 g CuNO₃ ÷ 187.56 g/mol = 0.0292 mol

Now we can <u>calculate the volume of the solution</u>, using the <em>definition of molarity</em>:

  • Molarity = moles / liters
  • 0.840 M = 0.0292 mol / liters
  • liters = 0.0348 L

Finally we <u>convert L into mL</u>:

  • 0.0348 L * 1000 = 34.8 mL
5 0
3 years ago
WILL GIVE BRAINLIEST What effect would El Niño most likely have on organisms? CHOOSE ONLY ONE A) El Niño would cause the extinct
Harrizon [31]

Answer:

it would have caused organisms to move in search of food and better conditions.

4 0
4 years ago
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When the reactive alkali metal sodium is reacted with poisonous chlorine gas, sodium chloride or table salt is produced. Is mass
PIT_PIT [208]

Answer:

Yes, Mass is conserved.

Explanation:

Every chemical reactions obey the law of conservation of mass. The law of conservation of mass states that in chemical reactions, mass is always constant.

     Equation:

                       2Na + Cl₂  →  2NaCl

From the equation above, one can observe that the reaction started using 2 atoms of Na and it produced 2 atoms of the same element in NaCl. A molecule of Cl produced 2 atoms of Cl in the NaCl

Design a simple experiment to support your answer:

Aim: To demonstrate the law of conservation of mass

   One Na atom weighs 23g

   Two Na atom will weigh 2 x 23 = 46g

1 atom of Cl is 35.5g

1 molecule of Cl containing two atoms of Cl will weigh 2 x 35.5 = 71g

Total mass of reactants = mass of 2Na + 1Cl₂ = (46 + 71)g = 117g

On the product side, Mass of 1 NaCl = 23+ 35.5 = 58.5g

Two moles of NaCl will give 2 x 58.5g = 117g

Since the mass on both side is the same, one can say mass is conserved.

7 0
3 years ago
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