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8_murik_8 [283]
3 years ago
8

What information can typically be found on the periodic table?

Chemistry
2 answers:
juin [17]3 years ago
5 0

Answer:

D. The number of protons an element has

Explanation: A P E X

Anit [1.1K]3 years ago
4 0

Answer:

Number of protons

Explanation:

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Scientists classify rocks into three different types. What is the main for basis for the classification system they chose?
dangina [55]
Rocks are classified as igneous, sedimentary or metamorphic. 
4 0
3 years ago
What has the biggest impact on a region,weather or atmosphere.
andreev551 [17]

<em>Weather.</em>

<em>You see how the weather is in a certain place can determine how the plant life and just life in general would live. It can also effect people. Let's say there was a drought somewhere, this would effect people whereas, they could lose a significant source of water and food because it would make them likely have to find a new water source or the animals would. Weather also effects the land in harmful ways. For example when it floods, the ground gets muddy but can also get so muddy below a certain area, that the soil entirely collapses into the ground (that would be a sinkhole).</em>

<em>There are picture below to show you some of the effects.</em>

<em>-R3TR0 Z3R0</em>

5 0
3 years ago
How much heat (in kj) is evolved in converting 1.00 mol of steam at 130.0 ∘c to ice at -55.0 ∘c? the heat capacity of steam is 2
nevsk [136]

The heat will be evolved in following process:

1) cooling steam from 130^{0}C to 100^{0}C = Q1

2) conversion of steam to water =Q2

3) Cooling of water to 0^{0}C[/tex=Q3]4) conversion of water to ice=Q45) cooling of ice from [tex]0^{0}C to -55^{0}C=Q5

Let us calculate each energy one by one:

1) Q1:

Mass of water vapour = moles X molar mass = 1mol X 18 = 18 grams

heat capacity of steam is 2.01\frac{J}{g^{0}C }

Q_{1}=massXheat capacityXchangeintemperature=18X2.01X(130-100)=-1085.4J

2) Q2:

for this we need heat of vaporisation of water = -40.7kJ/mol

so the heat evolved in conversion of stem to water is -40.7kJ

3) Q3

the specific heat of water is 4.18\frac{J}{g^{0}C }

heat evolved in cooling of water will be Q_{3}=massXspecific.heatXchange.in.temperature=18X4.184X100=7531.2J=7.531kJ

4)Q4:

The heat of conversion of ice to water (melting) is 6.02kJ/mol

5) Q5

The cooling of ice will require

Q_{5}=massXspecificheatXchangeintemperature=18X2.09X(-55)=-2069.1J=-2.069kJ

The total energy released is

Q_{total}=Q1+Q2+Q3+Q4+Q5=1.085+40.7+7.531+6.02+2.069=59.474kJ

The heat released will be 59.474 kJ


5 0
3 years ago
How many atoms in 0.35 moles of Oxygen?
svp [43]

The answer is: 11 g .

How many molecules are in 0.35 moles?

Explanation: So, I have 0.35 moles of ethanol: thus I have 0.35×NA ethanol molecules . Now NA=6.022×1023 .

Thus, 0.25 mole of oxygen contains 1.505×1023 molecules.

One mole of oxygen atoms contains 6.02214179×1023 oxygen atoms

4 0
3 years ago
Which of the following statements about gases is not correct? A. They have much lower densities than solids or liquids. B. They
IgorLugansk [536]

Answer:

C. They have stong intermolecular forces causing the particles to cling together.

Explanation:

Have you ever seen images where gases are all spread out and floating around? Well if you have, this is because the intermolecular forces are weak and are spreak apart. Contrary to this incorrect statement, solids have the stongest intermolecular force and cling together.

7 0
4 years ago
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