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In-s [12.5K]
3 years ago
8

Which of these is an element? Carbon Carbon dioxide Air Water

Chemistry
2 answers:
Natali5045456 [20]3 years ago
8 0

Answer:

carbon

Explanation:

none of the others are on the periodic table

DerKrebs [107]3 years ago
5 0

Answer:

carbon

Explanation:

the rest are mixtures/ compounds.

hope this helps! have a great day!

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How might a chef use chemistry?
lesya692 [45]

Answer:

A. Chemistry can help a chef understand how to combine different ingredients in a recipe.

Explanation:

Knowing the chemical reactions between ingredients used in cooking helps chefs understand how well different ingredients would react to eachother.

*Im pretty sure this is correct.

6 0
2 years ago
The two most abundant elements in earth's core are ?
vesna_86 [32]
The two most abundant elements in Earths core are Iron and Nickel.

Hope this helps!
3 0
3 years ago
Read 2 more answers
At STP (101.3 kPa, 0 °C), what volume would 2.00 moles of oxygen gas occupy? The gas constant is 8.31
lakkis [162]

Answer:

44.8 L

Explanation:

Ideal Gas Equation -

i.e.,

PV = nRT

where,

P = pressure

V = volume

n = moles

R = universal gas constant

T = temperature

Using the information given in the question, Volume of the gas can be calculated -

P = 101.3 kPa

V = ?

n = 2.00 moles

R = 8.31

T = 0 degree C = 273.15 K

Using the above data, and putting the data in the respective formula -

PV = nRT

101.3 kPa * V = 2.00 moles * 8.31 * 273.15 K

V = 44.8 L

Hence, the volume of the given gas = 44.8 L

4 0
3 years ago
The rate law for the reaction
juin [17]

Explanation:

Since, the given reaction is as follows.

              2NO(g) + Cl_{2}(g) \rightarrow 2NOCl(g)

Hence, rate law of the reaction is as follows.

               R = k[NO][Cl_{2}]

As it is known that rate of a reaction depends on the initial concentration of products. So here, the rate of reaction will depend on the concentration of NO and Cl_{2}. Since, power of the concentrations of each of these is equal to 1. Therefore, order of the reaction is equal to 1 + 1 = 2.

According to the rate law, reactants involved in the rate determining step are NO and Cl_{2}. Hence, first step of the mechanism is the rate determining step.

Also, according to the rate of reaction doubling the concentration of NO will double the rate of reaction.

The number of reactants taking part in a single step of the reaction is known as molecularity of the reaction. Therefore, molecularity of the first step of the reaction is 2.

Both the given steps are not termolecular.

5 0
3 years ago
The public is not yet able to purchase hydrogen fuel cell powered cars because engineers have to determine how the cars perform
muminat

The given question is incomplete the options of the compete are:

A. On racecar tracks

B. In real-world conditions

C. In flooded environments

D. On closed courses

Answer: In real world conditions.

Explanation:

Fuel cell vehicles use hydrogen has as a fuel in order to run the car. Unlike the other conventional vehicle that run on fossil fuels and gasoline.

The hydrogen and oxygen combines together in order to power the the motor in the car. The electricity produced by the combination of this runs the car and the waste product is water.

They are also called as electronic cars but the main problem is that it has not been yet tested in the real world. There are many more physiological conditions that differ from place to place in the real world conditions.

Firstly, the cars needs to be tested in the real world and see where there are any advantages and disadvantages over conventional vehicles.

Hence, it is not available to the general public for purchase.

8 0
3 years ago
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