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ludmilkaskok [199]
2 years ago
6

What is the ‘structural formula’ of water ? BRAINLIEST ANSWER !!

Chemistry
2 answers:
Natalija [7]2 years ago
8 0

H2O, one Oxygen in the middle, surrounded by 2 hydrogen, usually close to each-other, which gives it polarity

vaieri [72.5K]2 years ago
6 0

Water is a colorless, tasteless and odorless substance which is considered to be an universal solvent.

Though you have asked for the structural formula of water which shows the arrangement of the molecules in a compound, but since I cannot draw it here so I will explain in words and hope to make it clear.

Water is made up of Hydrogen and Oxygen in the ratio 2:1 respectively. Therefore its chemical formula is H2O, meaning that each molecule of water contains one Oxygen atom in the middle combined with 1 Hydrogen atom at 'each side' which are bonded covalently.


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a student carried out a combustion reaction with methane (ch4) as the limiting reagent. a 12.0g quantity of methane was used, an
almond37 [142]

The total percent yield:

After the combustion reaction with methane, the percent yield was 66.7%.  

Combustion of Methane:

  • Methane produces a blue flame as it burns in the atmosphere.
  • Methane burns in the presence of enough oxygen to produce carbon dioxide (CO₂) and water (H₂O).
  • It creates a significant quantity of heat during combustion, making it an excellent fuel source.

The other reactant, air's excess oxygen, is always present, making methane the limiting reactant. As a result, the amount of CH₄ burned will determine how much CO₂ and H₂O are produced.

The following chemical process produces carbon dioxide from methane:

CH₄ + 2O₂ ⇒ CO₂ + 2H₂O

Calculations:

1. <u><em>Theoretical quantity of carbon dioxide:</em></u>

All calculations will be based on the amount of methane because the problem specifies that it is the limiting reagent:

12.0g of CH₄ × (1 mol of CH₄/16g CH₄) × (1 mole of CO₂/1 mole of CH₄) × (44g CO₂/1 mole of CO₂)

= 33g of CO₂

2. <u><em>Percent yield:</em></u>

= Actual yield/Theoretical yield × 100

= 22.0g/33g × 100

= 66.7%

Learn more about the percent yield here,

brainly.com/question/15535037

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7 0
2 years ago
How many molecules of N2 are in a 400.0 mL container at 780 mm Hg and 135°C? Avogadro’s number = 6.022 x 1023A) 7.01 × 1021 mole
ASHA 777 [7]

Answer:

B

Explanation:

Firstly, we will need to calculate the number of moles. To do this, we make use of the ideal gas equation

PV = nRT

n = PV/RT

The parameters have the following values according to the question:

P = 780mmHg, we convert this to pascal.

760mHG = 101325pa

780mmHg = xpa

x = (780 * 101325)/760 = 103,991 Pa

V= 400ml = 0.4L

T = 135C = 135 + 273.15 = 408.15K

n = ?

R = 8314.463LPa/K.mol

Substituting these values into the equation yields the following:

n = (103991 * 0.4)/(8314.463 * 408.15)

= 0.012 moles

Now we know 1 mole contains 6.02 * 10^23 molecules, hence, 0.012moles will contain = 0.012 * 6.02 * 10^23 = 7.38 * 10^21 molecules

8 0
2 years ago
Read 2 more answers
Why does knowing types of mixtures help you to identify a substance?
Reil [10]

Answer:

This is my own explanation:

Explanation:

It is important to know the mixtures you input together because you may determine the type of substance you produced from different elements and several combinations of matter. This assists in identifying your specific substance.

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2 years ago
Which equation correctly relates the heat of reaction to the standard heats of formation?
VARVARA [1.3K]

Answer:

D

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∆H° = ∆Hf ° (products) – ∆Hf ° (reactants)

4 0
3 years ago
Construct a model to show the movement of matter and energy from plants into other organisms. Show how mass and energy are conse
ad-work [718]

Plants obtain energy from the sun during photosynthesis and pass it along the food chain.

<h3>What is a model?</h3>

A model is a representation of reality. We use models to understand what the real situation of things is like.

Let us recall that plants are the producers in the ecosystem. Energy flow from plants to animals. Plants obtain energy via the reaction 6CO2 + 6H2O --->C6H12O6 + ATP. This energy is passed along the food chain as organisms feed on each other.

Learn more about models: brainly.com/question/14281845

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2 years ago
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