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m_a_m_a [10]
3 years ago
8

How many atoms of oxygen are there in one molecule of carbon dioxide, if the chemical formula is CO2?

Chemistry
2 answers:
Alecsey [184]3 years ago
7 0

Answer:

2 oxygen

Explanation:

1 carbon dioxide

2 oxygen

defon3 years ago
6 0

Answer:

2

Explanation:

CO₂ shows that there are 2 oxygen molecules. Also, the name Carbon Dioxide. This shows there is One Carbon and Two Oxygen molecules from the naming system.

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Luther accidentally spilled his chemicals, and they splashed onto his arm and legs. Which piece of equipment should he use?
den301095 [7]

Answer:

safety shower

Explanation:

its on his body, not his eyes, and fire safety wont help here.

5 0
3 years ago
A rock occupies a volume of 20 cm3 and has a mass of 54 grams. Find the density of this rock
Nataly [62]

Answer:

2.7 gm/cm cubed

Explanation:

To get the answer, you should divide the mass by the volume or 54 divided by 20 = 2.7

4 0
3 years ago
At body temperature (37°C), the rate constant of an enzymecatalyzed decomposition is 2.3X10¹⁴ times that of the uncatalyzed reac
schepotkina [342]

The activation energy is lowered by 85351.23 J/mol.

<h3>What is the activation energy?</h3>

The activation energy is the energy that is used to start a reaction.

In K = (In A) - (Ea / RT)

In K = (-Ea / RT) + In A

Where k = the activity constant

Ea = activation energy

R = molar gas constant

T = absolute temperature in Kelvin

In K₁ = (-Ea₁ / RT) + In A (eqn 1)

At point 2 with the catalyst

In K₂ = (-Ea₂ / RT) + In A (eqn 2)

Note that the molar gas constant, the absolute temperature in Kelvin, and the activity constant are all the same for both points.

Subtract (eqn 1) from (eqn 2)

In K₂ - In K₁ = (-Ea₂ / RT) - (-Ea₁ / RT) + In A - In A

In (K₂ / K₁) = (1/RT) (Ea₁ - Ea₂)

We were told that K₂ / K₁ = 2.3 × 10¹⁴, then find the difference in Ea

R = 8.314 J/mol.K, T = 37°C = 310.15 K

In (2.3 × 10¹⁴) = (1/ (8.314×310.15) (Ea₁ - Ea₂)

33.1 = (1/2578.5871) (Ea₁ - Ea₂)

(Ea₁ - Ea₂) = 33.1 × 2578.5871 = 85351.23 J/mol

Thus, the enzyme that lower the Ea is 85351.23 J/mol.

To learn more about activation energy, refer to the below link:

brainly.com/question/15114573

#SPJ4

8 0
2 years ago
Who want's to just talk
Gelneren [198K]

Answer:

f

gb

Explanation:

cgb

5 0
3 years ago
Read 2 more answers
For each phase change, determine the sign of ΔH and ΔS. Drag the appropriate items to their respective bins. HelpReset sublimati
snow_lady [41]
We know that the relationship between enthalpy and entropy is:
ΔS = <span>ΔH/T
Therefore, both the change in enthalpy and the change in entropy will have the same sign. Now, considering each change:

Sublimation: Negative
Freezing: Positive
Condensation: Positive
Deposition: Positive
Boiling: Negative
Melting: Negative</span>
8 0
4 years ago
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