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Nimfa-mama [501]
4 years ago
7

How many moles of O2 are required to generate 18 moles of H2O in the given reaction?

Chemistry
2 answers:
lbvjy [14]4 years ago
7 0

Answer:

e

Explanation:

sashaice [31]4 years ago
4 0

Answer:

25 mol

Explanation:

2C₈H₁₈ + 25O₂ ⟶ 16CO₂ + 18H₂O

The equation tells us that 25 mol O₂ generate 18 mol H₂O.


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The arrows in the chart below represent phase transitions.
Lana71 [14]

Answer:

a. 1,2,and 3.

Explanation:

When something turns liquid, e.g. metal, you need to heat it. When something turns gas, e.g. water, you need to heat it. And when something goes directly from solid to gas, e.g. dry ice, carbon dioxide, you need to add heat to it. hope this helps! Please mark brainiest.

4 0
3 years ago
#1: How are the elements arranged in the modern periodic table?
Alekssandra [29.7K]

1- The correct answer is C :


the elements arranged in the modern periodic table by increasing atomic number.


The explanation:


-The elements in the periodic table are arranged to increase the atomic number. All of these elements display several other trends and we can use the periodic law and table formation to predict their chemical, physical, and atomic properties.


2- The correct answer is C:


strontium, magnesium, calcium, beryllium are the elements which have similar properties.


The explanation:

-strontium, magnesium, calcium, beryllium, these belong to the alkaline earth metal group.

Because the outer electron structure in all of these elements is similar, they all have somewhat similar chemical and physical properties .

3- The correct answer is A :


Potassium


The explanation:


-The elements potassium and sodium have similar chemical properties because they have the same number of valence electrons and form +1 ions.



4- The correct answer is D


The explanation:


Mendeleev didn't include helium, neon, and argon in his periodic table because these elements had not yet been discovered.


5- The correct answer is B:


The periodic law describes trends seen across periods within the periodic table.


The explanation:


When the chemical elements are arranged, there is a pattern called the “periodic law” in their properties, in which elements in the same column (group) have similar properties


4 0
3 years ago
Read 2 more answers
Define shielding and effective nuclear charge. What is the connection between the two?
ivolga24 [154]

Answer:

The relation between the shielding and effective nuclear charge is given as

Z_{eff} = Z -S

where s denote shielding

z_{eff} denote effective nuclear charge

Z - atomic number

Explanation:

shielding is referred to as the repulsion of an outermost electron to the pull of electron from valence shell.  Higher the electron in valence shell higher will be the shielding effects.  

Effective nuclear charge is the amount of net positive charge that valence electron has.

The relation between the shielding and the effective nuclear charge is given as  

Z_{eff} = Z -S

wheres denote shielding

z_{eff} denote effective nuclear charge  

Z - atomic number

8 0
3 years ago
10decimeter=<br><br> 10Decameter=
snow_lady [41]

Answer:

Explanation:

No, I don't owe nothing

Stop acting funny 5I've seen them running

Coming for more

4646

3 0
3 years ago
The colour change of methyl orange with neutral substance​
Arisa [49]

Answer:

Pink

Explanation:

Because at first its orange then neutral its pink

3 0
4 years ago
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