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Rom4ik [11]
3 years ago
13

Puzzle: A man stands on a road in Iowa looking up at the night sky. On one night he sees the constellation Orion. But on another

night, at the same time and on the same road, he sees the constellation Scorpius.
Chemistry
1 answer:
nasty-shy [4]3 years ago
5 0

Answer:

altho I don't believe in supper stision I would say that Scorpius has killed Orion.

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Which of the following is a variable property for a gas ? Select all that apply.
disa [49]
C) volume
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The volume of gas depends on e.g. temperature and pressure.
8 0
3 years ago
Read 2 more answers
Define diffusion. Is it faster in summer or winter season?
Basile [38]
Diffusion is the process of a substance spreading out to evenly fill its container or environment. Kinetic energy of particles of matter increases with an increase in temperature. More the kinetic energy in the particles, more is the rate of diffusion. so diffusion is faster in the summer!

hope this helps!
6 0
4 years ago
Read 2 more answers
En un matraz, disponemos de 100 g de gas oxígeno que se encuentran a 1 at de presión y 273 K de temperatura. Calcular : a) el nú
Misha Larkins [42]

Answer:

Explanation:

Dado que:

masa de oxígeno gaseoso = 100 g

presión = 1 atm

temperatura = 273 K

(a)

número de moles de oxígeno contenidos en el matraz = masa de oxígeno / masa molar de oxígeno

= 100 g / 16 gmol⁻¹

= 6.25 moles

(b) El número de moléculas de oxígeno es el siguiente:

Dado que 1 mol de oxígeno gaseoso contiene 6.023 * 10²³ moléculas de oxígeno.

Entonces, 6.25 moles contendrán:

= (6.25 ×  6.023 * 10²³) moléculas de oxígeno.

≅ 3.764 × 10²³ moléculas de oxígeno.

(c) El número de átomos de oxígeno es:

= 2 × 3.764 × 10²³

= 7.528 × 10²³ átomos de oxígeno

(d) Usando la ecuación de gas ideal

PV = nRT

El volumen ocupado por el oxígeno = \dfrac{nRT}{P}

Volumen ocupado por oxígeno = \dfrac{ 6.25 * 8.314 *273}{1}

Volumen ocupado por oxígeno= 14185.76 m³

3 0
3 years ago
Chemical properties of matter depend mostly on A. the shape and size of the substance. B. the color of the substance. C. the typ
eimsori [14]

incorrect the answer is

the types of atoms and bonds that a substance contains

8 0
4 years ago
Balance the following chemical equation:<br><br> _Cr2O3+_Mg—&gt;_Cr+_MgO
Sergio [31]

Answer:

The answer to your question is Cr₂O₃  +  3Mg  ⇒   2Cr  +  3MgO

Explanation:

Data              

Unbalanced chemical reaction

               Cr₂O₃  +  Mg  ⇒   Cr  +  MgO

           Reactants        Elements       Products

                  2                      Cr                 1

                  3                       O                 1

                  1                        Mg               1

Balanced chemical reaction

               Cr₂O₃  +  3Mg  ⇒   2Cr  +  3MgO

           Reactants        Elements       Products

                  2                      Cr                 2

                  3                       O                 3

                  3                        Mg              3

Now the reaction is balanced

4 0
4 years ago
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