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AleksandrR [38]
3 years ago
11

17. this gas combines with iron in rock and turns it into rust

Chemistry
1 answer:
Reptile [31]3 years ago
5 0

Answer:

oxygen

Explanation:

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how can the temperature of a substance remain the same even if the substance is absorbing thermal engergy
olchik [2.2K]
When it changes phases energy is needednto break down the bonds so that is can change state from one phase to another.
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2 years ago
Explain why and how theories may be changed or replaced over time.
malfutka [58]
There are new ideas and questions that people are trying out and solving. Based off of that, the theories and ideas that we have now will change and evolve with the theories that have been tested and the questions that have been answered.
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3 years ago
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A particular balloon can be stretched to a maximum surface area of 1257 cm2. The balloon is filled with 3.1 L of helium gas at a
lianna [129]

Answer:

P = 0.6815 atm

Explanation:

Pressure = 754 torr

The conversion of P(torr) to P(atm) is shown below:

P(torr)=\frac {1}{760}\times P(atm)

So,  

Pressure = 754 / 760 atm = 0.9921 atm

Temperature = 294 K

Volume = 3.1 L

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

0.9921 atm × 3.1 L = n × 0.0821 L.atm/K.mol × 294 K  

⇒n of helium gas= 0.1274 moles

Surface are = 1257 cm²

For a sphere, Surface area = 4 × π × r² = 1257 cm²

r² = 1257 / 4 × π ≅ 100 cm²

r = 10 cm

The volume of the sphere is :

V=\frac {4}{3}\times \pi\times r^3

Where, V is the volume

r is the radius

V=\frac {4}{3}\times \frac {22}{7}\times {10}^3

V = 4190.4762 cm³

1 cm³ = 0.001 L

So, V (max) = 4.19 L

T = 273 K

n = 0.1274 moles

Using ideal gas equation as:

PV=nRT

Applying the equation as:

P × 4.19 L = 0.1274 × 0.0821 L.atm/K.mol × 273 K  

<u>P = 0.6815 atm</u>

<u></u>

4 0
3 years ago
Which of these relies on a renewable resource to produce energy
mrs_skeptik [129]
<span><span><span>
D- coal-burning stove </span>is the correct answer</span></span>
7 0
3 years ago
Which of the following best explains how an organism's phenotypic traits increase the chances for a species to survive?
andreyandreev [35.5K]

Answer:

A

An organism’s phenotype may influence its ability to find food, and also might affect the organism’s ability to reproduce and pass on favorable alleles.

B.

An organism’s phenotype may influence its ability to produce chromosomes and pass those chromosomes to future generations

C.

An organism’s phenotype may influence its ability to turn on certiain genes necessary for survival.

D.

An organism’s phenotype is not connected with the chances for a species to survive.

Explanation:

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