Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture:

Why can scientists get energy from plants

matrenka [14]

Becuase they have water and oxygen carbon dioxide in them

3 0

4 years ago

A substance absorbed 895 J and caused its temperature to increase by 10 ºC. If the substance has a mass of 27.9 g, what is the s

Irina18 [472]

Answer:

i dont get the equation sorry wish i can help

5 0

3 years ago

Read 2 more answers

6) What types of atomic orbitals are in the third principal energy

Bumek [7]

Answer:

Types of atomic orbitals present in the third principal energy are s, p and d only .

Explanation:

OPTION A-: s and p atomic orbitals - these two orbitals are present in second principal energy level. Therefore , the option is incorrect.

 OPTION B-: p and d only - This option is wrong as there is no such principal level energy where , s atomic orbital is absent .

OPTION C-: s , p and d only -these orbitals are present in third principal energy level. The third major level of energy has one orbital, three orbitals of p, and five orbitals of d, each of which can contain up to 10 electrons. The third stage thus holds a maximum of 18 electrons. This option is correct .

OPTION D-: s , p, d and f only -There is also a f sublevel at the fourth and higher stages, containing seven f orbitals, which can accommodate up to 14 electrons at most. Therefore, up to 32 electrons will hold the fourth level: 2 in the s orbital, 6 in the three p orbitals, 10 in the five d orbitals, and 14 in the seven f orbitals. This option is incorrect .

Thus , the correct option is C (s , p and d only .)

6 0

4 years ago

A sealed, expandable container is initially at 2.000 L and 25°C. To what temperature must it be changed to have a volume of 6.00

balandron [24]

Answer:

The new temperature is 894 K or 621 °C

Explanation:

Step 1: Data given

Initial volume of the container = 2.000L

Initial temperature = 25.0 °C = 298 K

Volume increased to 6.00 L

Step 2: Calculate the new temperature

V1/T1 = V2/T2

⇒with V1 = the initial volume = 2.00L

⇒with T1 = the initial temperature = 25 °C = 298 K

⇒with V2 = the increased volume 6.00 L

⇒with T2 = the new temperature

2.00 L / 298 K = 6.00 L / T2

T2 = 894 K = 621 °C

The new temperature is 894 K or 621 °C

4 0

4 years ago

Nitrogen gas and oxygen gas react according to the following equation

Paraphin [41]

If the system is cooled, more of the products will be formed as the equilibrium shifts to the right.

Explanation:

The reaction is an endothermic reaction which absorbs heat from the environment. This is why we see energy on the reactant side.

This reaction is in equilibrium when energy is absorbed in this manner.

According to Le Chatelier's principle "if any of the conditions of a system in equilibrium is changed, the system will adjust itself in order to annul the effect of the change".

A change in temperature of an equilibrium system shifts the system to a new equilibrium point.
The backward reaction is favored by an increase in temperature because heat is absorbed in that step.
This will eventually lead to the production of more of the product.
Cooling the system will decrease the temperature and will favor the forward reaction.
If the system is cooled, more of the products will be formed as the equilibrium shifts to the right.
More NO gas will be produced in the process.

learn more:

Chemical equilibrium brainly.com/question/5877801

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6 0

3 years ago