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dybincka [34]
3 years ago
15

Is it possible to identify something as an element, compound or pure substance

Chemistry
1 answer:
Nina [5.8K]3 years ago
8 0
Yes it is possible.
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NASA has been scanning neighboring planets for signs of life, but there is always the possibility that life on other planets cou
Alex

Answer:

Silicon

Explanation:

One of the most similar elements to carbon on periodic table is silicon. Several compounds formed between carbon or silicon and other elements are identical.

Carbon is an element found in life forms as a building block while silicon is a building block of machine components such as semiconductors

Silicon is an element that can sustain bonds, similar to carbon bonds and it is situated directly under carbon on the periodic table

5 0
4 years ago
Need help ASAP!!!!!!!
geniusboy [140]
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8 0
3 years ago
A student checks the air in her bicycle tires early in the morning when it is cool outside. If she measures it again later in th
Dmitry_Shevchenko [17]

Answer:

She will observe that the pressure on the tire is higher.

Explanation:

By the ideal gas law, the pressure and the temperature are directly proportional, so, if the temperature increases the pressure increases too:

PV = nRT (P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature).

The temperature is a measure of the average kinetic energy of the gas molecules, so when the temperature increases, the energy also increases, and the gas molecules will move more quickly, so they will collide more often between themselves and in the wall. Those collisions will be with more force because the velocity is higher.

So, the pressure will be higher, because it is the result of collisions of the gas molecules with the walls of the tire.

6 0
3 years ago
What is the partial pressure (in atm) of CO₂ at 468.2 K in a 25.0 L fuel combustion vessel if it contains 60.0 grams CO₂, 82.1 g
NeTakaya

Answer:

2.09 atm

Explanation:

Step 1: Given and required data

  • Mass of CO₂ (m): 60.0 g
  • Volume of the vessel (V): 25.0 L
  • Temperature (T): 468.2 K

We won't need the data of water and uncombusted fuel, since the partial pressures are independent of each other.

Step 2: Calculate the number of moles (n) corresponding to 60.0 g of CO₂

The molar mass of CO₂ is 44.01 g/mol.

60.0 g × 1 mol/44.01 g = 1.36 mol

Step 3: Calculate the partial pressure of CO₂

We will use the ideal gas equation.

P × V = n × R × T

P = n × R × T/ V

P = 1.36 mol × (0.0821 atm.L/mol.K) × 468.2 K/ 25.0 L = 2.09 atm

5 0
3 years ago
help me please. Can you please explain to me how to solve them? you can also send me a photo if that's better for you. thanks al
zheka24 [161]

Refer to the attachment

7 0
3 years ago
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