All categories

3 years ago

1.which of the following correctly describes carbon, represented by c?

Chemistry

1 answer:

Gnoma [55]3 years ago

8 0

1 is an element, 2 is an compound

You might be interested in

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 13.2 g of carbon were burned in the presence of

inessss [21]

C + O2 -> CO2
Oxygen is the excess reactant (doesn’t get used up in reaction, therefore mass of o2 is irrelevant) so use carbon (the limiting reactant) to calculate the mass of CO2

u should get 48.4g

4 0

3 years ago

Read 2 more answers

A gas that has a volume of 28 liters, a temperature of 45 °C, and an unknown pressure has its volume increased

allochka39001 [22]

Answer:

2.5 atm

Explanation:

V1 = 28L

T1 = 45°C = (45 + 273.15)K = 318.15K

V2 = 34L

T2 = 35°C = (35 + 273.15)K = 308.15k

P2 = 2.0atm

P1 = ?

From general gas equation,

(P1 × V1) / T1 = (P2 × V2) / T2

P2 × V2 × T1 = P1 × V1 × T2

P1 = (P2 × V2 × T1) / (V1 × T2)

P1 = (2.0 × 34 × 318.15) / (28 × 308.15)

P1 = 21634.5 / 8628.2

P1 = 2.5 atm

The initial pressure of the gas is 2.5atm

5 0

3 years ago

Convert 8.4 • 10^16 molecules of CO2 to moles

Degger [83]

Answer:

0.00000000000000084

Explanation:

8 0

3 years ago

There are four springs stretched by the same mass. Spring A stretches 25 cm. Spring B stretches 10 cm. Spring C stretches 100 cm

Aleks04 [339]

Answer: D

Explanation:

I took the test

4 0

4 years ago

Which element or compound has lost electrons in this oxidation-reduction reaction? 4li 2coo â†’ 2co 2li2o a. coo b. li2o c. li d

Nady [450]

Answer:

Correct option is C.

Explanation:

Such type of chemical reaction that involves a transfer of electrons between two species is known as oxidation-reduction or redox reaction.

Redox reaction is oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

For this reaction:

On reactant side:

Oxidation state of oxygen, cobalt, lithium = -2 ,+2, 0

While on product side of reaction:

Oxidation state of cobalt, oxygen, lithium = 0, -2, +1

Here, oxidation reaction take place because oxidation state of lithium is increased. While the oxidation state of cobalt in reducing, it is gaining electrons and so it undergoes reduction reaction.

So, Option C (Li) is correct.

Learn more about oxidation-reduction reaction:

brainly.com/question/13293425

#SPJ4

7 0

2 years ago