Answers
Answer:
The given reaction is a combustion reaction of benzene,
C
6
H
6
. From its balanced chemical equation,
2
C
6
H
6
+
15
O
2
→
12
C
O
2
+
6
H
2
O
,
the mass of carbon dioxide
(
C
O
2
)
produced from 20 grams (g) of
C
6
H
6
is determined through the molar mass of the two compounds, given by,
M
M
C
O
2
=
44.01
g
/
m
o
l
M
M
C
6
H
6
=
78.11
g
/
m
o
l
and their mole ratio:
12
m
o
l
C
O
2
2
m
o
l
C
6
H
6
→
6
m
o
l
C
O
2
1
m
o
l
C
6
H
6
With this,
m
a
s
s
o
f
C
O
2
=
(
20
g
C
6
H
6
)
(
1
m
o
l
C
6
H
6
78.11
g
C
6
H
6
)
(
6
m
o
l
C
O
2
1
m
o
l
C
6
H
6
)
(
44.01
g
C
O
2
1
m
o
l
C
O
2
)
=
(
20
)
(
6
)
(
44.01
)
g
C
O
2
78.11
=
5281.2
g
C
O
2
78.11
m
a
s
s
o
f
C
O
2
=
67.6
g
C
O
2
Therefore, the mass in grams of
C
O
2
formed from 20 grams of
C
6
H
6
is
67.6
g
C
O
2
.
it is a problem of app
The grams of C₆H₆ needed to produce 25 g of CO₂ are 7.38g.
What is Mole concept?Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.
No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.
Mass of a particular product is also find out by stoichiometry of a reaction as per the no. of mole given in the reaction.
Given,
Mass of CO₂ = 25g
2C₆H₆ + 15O₂ → 12CO₂ + 6H₂O
As per reaction, 156g of C₆H₆ gives - 528g of CO₂
0.295g of C₆H₆ gives - 1g of CO₂
0.295 × 25 g of C₆H₆ gives - 25g of CO₂ = 7.38g C₆H₆
Therefore, The grams of C₆H₆ needed to produce 25 g of CO₂ are 7.38g.
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what conditions does bacteria need to grow in yogurt?
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_______________________ yield is another name for actual yield
Answers
The second name that can be used to describe actual yield is Theoretical yield is another name for the actual yield
What is actual YieldThe actual yield is the amount of product obtained from a chemical reaction and it is lesser or equal to the theoretical yield ( the amount of product that can be obtained from a reaction when all reactants are converted ).
Hence we can conclude that theoretical yield is another name for the actual yield.
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When salt is added to water, what happens to the molecules?
The water molecules remain together. The salt molecules break apart.
Water and salt molecules remain together.
The water molecules break apart. The salt molecules remain together.
Water and salt molecules break apart.
Answers
Answer:
The the salt dissolves
Explanation:
The salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules.
Giving Brainliest
Which choice is an example of the use of sound energy in everyday life?
batteries powering toys
fireplaces keeping people warm
lights helping people see
car horns preventing accidents
Answers
Answer:
car horn preventing accidents
Answer:
d) car horns preventing accidents
Explanation:
the use of car horns represents sound energy in everyday life. batteries use chemical energy that is turned into electrical energy, fireplaces use thermal energy, and lights use electrical energy!
The picture compound has which Bond
Answers
hard water contains calcium and magnesium ions. one way to soften water is to add sodium phosphate. Write complete and net ionic equations for the reaction of these two alkaline earth metals with aqueous sodium phosphate
Answers
Explanation:
The photo is the net ionic equation for the Calcium ions
The net ionic equation for the reaction is [tex]3Ca^{+2} + 2PO^{-3}_2----- > Ca_3(PO_4)_2[/tex]
What is chemical reaction?A chemical reaction is the chemical transformation of one set of chemical substances into another.
When chemical bonds between the atoms are formed or broken, chemical reactions occur.
The substances that initiate a chemical reaction are known as reactants, and the substances that result from the reaction are known as products.
Plants grow, start producing fruit, and decompose to become compost for new plants through chemical reactions.
The reaction for the given scenario is,
[tex]3Ca^{+2} + 2PO^{-3}_2----- > Ca_3(PO_4)_2[/tex]
Thus, above mentioned is the chemical reaction.
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what would you expect to happen if you put a red blood cell in a glass pure water distilled water g
Answers
What is the volume of 1.758 mole of a gas at standard temperature and pressure
Answers
Answer:
39.379 liters
Explanation:
One mole of gas at STP = 22.4 l / mole
22.4 l/mole * 1.758 mole = 39.379 liters
6. How many moles of water would require 92.048 kJ of heat to raise its temperature from 34.0 °C to 100.0 °C? (3 marks)
Answers
Taking into account the definition of calorimetry, 0.0185 moles of water are required.
CalorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
Mass of water requiredIn this case, you know:
Heat= 92.048 kJMass of water = ?Initial temperature of water= 34 ºCFinal temperature of water= 100 ºCSpecific heat of water = 4.186 [tex]\frac{J}{gC}[/tex]Replacing in the expression to calculate heat exchanges:
92.048 kJ = 4.186 [tex]\frac{J}{gC}[/tex]× m× (100 °C -34 °C)
92.048 kJ = 4.186 [tex]\frac{J}{gC}[/tex]× m× 66 °C
m= 92.048 kJ ÷ (4.186 [tex]\frac{J}{gC}[/tex]× 66 °C)
m= 0.333 grams
Moles of water requiredBeing the molar mass of water 18 [tex]\frac{g}{mole}[/tex], that is, the amount of mass that a substance contains in one mole, the moles of water required can be calculated as:
[tex]amount of moles=0.333 gramsx\frac{1 mole}{18 grams}[/tex]
amount of moles= 0.0185 moles
Finally, 0.0185 moles of water are required.
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.
A species is a group of organisms that closely resemble each other in physical appearance and behavior and can mate and produce young that can also mate and produce young. True or false?
false
true
Answers
Answer:
True
Explanation:
It's a true statement
Answer:
True
Explanation:
A species is a group of similar organisms that can breed with one another to produce fertile offspring. For example, humans are one species and dogs are another species. Individuals of the same species can reproduce to make more individuals of the same species.
Which of the following is an ionic compound?
A. N2O B. CO C. HCL D. Na2O
Answers
Answer:
D. Na2O
Because we already know that sodium oxide is a binary ionic compound because it contains one metal cation and one non-metal anion.
Answer:
D. Na2O
Explanation:
Sodium oxide (Na2O) is an ionic compound. Its constituent atoms are, respectively, a metal and a non-metal.
Sodium (Na), as a metal, will attempt to lose electrons to reach an octet state. Oxygen (O2), as a non-metal, will attempt to gain electrons to reach an octet state.
:-befrank
Use this equation: N2 + 3H2 → 2NH3, for the following problems:
1. If 2.5 moles of N2 react, how many grams of NH3 can be produced?
2. If 10.0 moles of NH3 are produced, how many grams of H2 would be required?
Use this equation: B2O3 + 3Mg → 3MgO + 2B, for the following problems:
3. How many grams of boron can be obtained from 8 moles of B2O3?
4. How many grams of magnesium are required to produce 4 moles of boron?
Use this equation: S8 + 12O2 → 8SO3, for the following problems:
5. How many grams of oxygen is needed to produce 7.5 moles of sulfur trioxide?
6. How many grams of sulfur trioxide can be produced from 2 moles of octasulfur?
Answers
Answer:hop this helps
Explanation:
What is h+ concentrate in a solution with a pH of 1.25 round to nearest hundredth
Answers
Answer:
0.0562
Explanation:
Ph=-log[H+]
to find the h+ is the antilogarithm of the Ph.
Which is 10 raised to the power - Ph.
Answer:
5.62
-2
Explanation:
What is the H+ concentration in a solution with a pH of 1.25? Round to the nearest hundredth.
5.62 × 10n M n= -2
About how many centimeters will make an inch?
A)5
B)2+
C) 200
D)10
Answers
Answer: B) 2+
Explanation:
There are exactly 2.54 centimeters in an inch, the closest option is:
B) 2+
Answer:
2.54 centimetres
Explanation:
Ur options are wrong
3. Arrange the following according to increasing acid strength
(i) Ka= 2.5 + 10-15
(ii) Ka= 9.0 + 10-9
(iii) pKa= 7.5
(iv) % dissociation =100
(a) iv, iii, ii, i
(b) ii, I, iii, iv
(c) i, iii, iv, ii
(d) i, ii, iii, iv
(e) iii, iv, ii, i
Answers
Answer:
3. Arrange the following according to increasing acid strength (i) Ka=2.5x 10-10 (ii) Ka=9.0x108 (iii)pKa= 7.5 (iv)% dissociation -100 (a) iv, iii, ii, i (b) ii, 1, iii, iv (c) i, iii, iv, ii (d)i, ii, iii, iv (e) iii, iv, ii, i
5. Consider the buffer NH/NH.Cl. If one wants to prepare 250.0mL of this buffer at pH 4.0. Is it possible to achieve one's sim? (a) yes (b) no 6. If the pH of the buffer in (5) above would be 9.0, the ratio of NH/NH.Cl required for the preparation, considering I Liter of buffer, is (a) 1.80 (b) 0.56 (c) 4.26 (d) 1.82 x 10: (e) K, (NH -1.8x109)
Explanation:
Please help!
A molecule that is either cycloheptane or cycloheptene is treated with bromine and the sample immediately absorbs the red bromine color—which compound is present?
Answers
The compound that is most likely present when treated with bromine and the sample absorbs the red bromine color is ; Cycloheptene
What is cyclohepteneCycloheptene is an unsaturated colorless oily liquid which is insoluble in water it absorbs Bromine when used in performing unsaturation test due it unsaturated nature.
The red bromine color will be absorbed when used to treat Cycloheptene but will not be absorbed when used to treat cycloheptane due to its saturated nature.
Hence we can conclude that the compound that is present is Cycloheptene.
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.
...............................
Answers
Answer:
F is correct
Explanation:
When an atom or group of atoms" has more protons than electrons",it is positively charged. An atom or group of atoms that has the same number of protons and electrons is neutrally charged.
Answer: If an object that has an excess of positive electrons it is a positively charged object.
what is this difference between a Mm and a mm? which is larger one Mm or one mm
Answers
Megameter. Try not to get them muddled up
because the are very different sizes.
The letter is different
3.Using Balanced Equations: C5H12+802–5CO2+6H20
A. If you have 358.4 Liters of O2 gas then what's the volume of CO2
b. If you have 360 grams of C5H12 then what's the mass of H2O
Answers
Answer:
i think b is the answer hope this helps:))
Engineers design computers to cool down quickly so they do not break. What happens to the molecules in a computer when the temperature of the computer decreases?
Answers
Answer:The energy of the molecules in the computer decreases.
Explanation:LET ME KNO IM WRONG
Answer: The energy of the molecules decrease in the computer
Explanation:
This is because you turned off the computer cooling it down and slowing the molecules.
What are the three main groups of macronutrients? (select three please)
minerals
proteins
fats
carboydrates
Answers
Answer:
protein, carbs, and fats.
Explanation:
Those are the three main sources of macronutrients.
(this isn't a chemistry, it's health)
Answer:
fats, carbohydrates and proteins
Explanation:
I don't know, I answered that on my test and it was correct
calculate the pressure in atmospheres of 1.92 moles of helium gas in a 10.0L container at 25C
Answers
The pressure in atmospheres of the given mole and volume of helium gas is 4.7atm.
Given the data in the question;
Amount of helium; [tex]n = 1.92mol[/tex]Volume of the gas; [tex]V = 10.0L[/tex]Temperature; [tex]T = 25^0C = 298.15K[/tex]Pressure in atmosphere; [tex]P = \ ?[/tex]
Ideal Gas LawThe Ideal gas law emphasizes on the behavior of a hypothetical ideal gas. It states that pressure P multiply by volume V is equal to moles times temperature and the universal gas constant.
It is expressed;
[tex]PV = nRT[/tex]
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant.( [tex]R = 0.08206Latm/molK[/tex] ).
To determine the pressure in atmosphere, we substitute our values into the expression above.
[tex]PV = nRT\\\\P = \frac{nRT}{V} \\\\P = \frac{1.92mol\ *\ 0.08206Latm/molK\ *\ 298.15K}{10.0L} \\\\P = \frac{46.975Latm}{10.0L}\\\\P = 4.7atm[/tex]
Therefore, the pressure in atmospheres of the given mole and volume of helium gas is 4.7atm.
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The Molar mass of silicon is 28.09 grams/mole
Calculate the number of atoms in a 92.8 mg sample of silicon
Write your answer in scientific notation using three significant figures
Answers
92.8 mg x 1 g/10^3 mg x 1 mol/28.09 g x 6.022x10^23 atoms/1 mol
2. Cancel units.
1.99 x 10^21 Si atoms
If an atom such as hydrogen is able to form a covalent bond describe what happens when the electron shells of two atoms overlap
Answers
Answer:
they share electrons to complete eachothers outer shell
Explanation:
use the kinetic theory to explain why a windy day is a good drying day?
Answers
Explanation:
Wind helps to get out molecules of water from clothes.
In summer Ball is hard b because due to heat kinetic energy of molecules increases
Which characteristic do all owl families share? A.) small eyes B.) large body size C.) nighttime hunting D.) heart-shaped faces
Need this answer in 5 MINUTES!
If any turtors are out there I need a Verified answer
Answers
Heart-shaped faces is the characteristic all owl families share and it is denoted as option D.
What is an Owl?
This is a type of bird which is known for its heart shaped face, big round eyes and reversible toe.
This animal has majority of its species as night time hunters which is why option D was chosen.
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An alkyne with the molecular formula C6H10 was reduced with H2 and Lindlar's catalyst. Ozonolysis of the resulting alkene afforded formaldehyde and an unbranched aldehyde. What is the IUPAC name of the alkyne that was reduced?
Answers
Given that the alkyne has a formula as C₆H₁₀, the IUPAC name of the alkyne is hexyne
What is an alkyne?Alkynes are unsaturated hydcarbons with the general formula of CₙH₂ₙ₋₂. They contains triple bonds (C≡C) in the carbon chains. The simplest member of this family is ethyne (C₂H₂)
The first nine members of the Alkynes sre:
Ethyne, C₂H₂Propyne, C₃H₄ Butyne, C₄H₆ Pentyne, C₅H₈Hexyne, C₆H₁₀Heptyne, C₇H₁₂Octyne, C₈H₁₄Nonyne, C₉H₁₆Decyne, C₁₀H₁₈Considering the question given above, the formula of the alkyne is C₆H₁₀.
Therefore, the name of the alkyne is hexyne
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Based upon the chemical equation in #2 above, if 45.7g C2H4O2 are used in the reaction, how many grams of H2O will result
Answers
calcium chloride and carbon dioxide
What happens to a positively charged ion during a chemical change?
Answers
Answer:
Positively charged ions move to the negative electrode during electrolysis
Explanation:
Electrolysis is the process by which electric current is passed through a substance to effect a chemical change
I hope I was able to help
the forces that keep liquid particles together are called _____ forces of attraction
Answers
Answer:
The forces that keep liquid particles together are called intermolecular forces of attraction.