CAN SOMEONE PLEASE HELP ME WITH THIS QUESTION
Wrong or inproper answer will be reported
Answers
The mass of unreacted zinc = 13 g
Further explanationThe reaction equation is the chemical formula of reactants and products
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reactants and products
Reaction
[tex]\tt Zn+2HCl\Rightarrow ZnCl_2+H_2[/tex]
mol ratio Zn : HCl = 1 : 2
mol of HCl[tex]\tt mol=V\times M\\\\mol=0.1~L(100~cm^3)\times 2~mol/L\\\\mol=0.2[/tex]
mol of Zn[tex]\tt \dfrac{1}{2}\times 0.2=0.1~mol[/tex]
the mass of reacted Zn :[tex]\tt 0.1\times 65=6.5~g[/tex]
the mass of unreacted Zn[tex]\tt 19.5-6.5=\boxed{\bold{13~g}}[/tex]
Related Questions
organize the following elements in order of increasing atomic radius (Ge, He, Sr, O, Ba)
Answers
Answer:
He
O
Ge
Sr
Ba
Explanation:
An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements.
In general, the size of an atom will decrease as you move from left to the right of a certain period.
What volume of silver metal will weigh exactly 2500g. The density of silver is 10,5 g/cubic centimeters.
Answers
Answer:
26250 cubic centimeters
Explanation:
If a gold bar is 16,000 g mass and 800 cm^3 volume what is the density?
Answers
Answer:
The answer is 20 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 16,000 g
volume = 800 cm³
We have
[tex]density = \frac{16000}{800} = \frac{160}{8} \\ [/tex]
We have the final answer as
20 g/cm³Hope this helps you
explain how to balance the chemical equation, KClO3 ⟶ KCl + O2 and include all steps
Answers
The balance of chemical equation : 2KClO₃ ⟶ 2KCl + 3O₂
Further explanationEqualization (balance) of chemical reactions can be done using variables. Steps in equalizing the reaction equation:
1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc. 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product 3. Select the coefficient of the substance with the most complex chemical formula equal to 1Reaction
[tex]\tt KClO_3\Rightarrow KCl+O_2[/tex]
1. Coefficient
KClO₃ ⟶ aKCl + bO₂
2. Equation
K ⇒ left =1, right=a ⇒a=1
Cl⇒ left =1, right=a ⇒a=1
O ⇒ left = 3, right = 2b ⇒3=2b, b = 1.5
The equation turns into :
KClO₃ ⟶ KCl + 1.5O₂
multiplied by 2
2KClO₃ ⟶ 2KCl + 3O₂
What all indicates a CHEMICAL change? *
A Solid melting into a liquid
After the change the substance is still reactive with oxygen
One substance becomes two new substances
The melting point was 100 deg C but after the change the melting point was 256 deg
C.
Answers
one substance becomes two new substances
how long will take an object traveling at 25 m/s to reach a distance of 125 meters?
Answers
Answer:
5s
Explanation:
3. compounds in which elements are held together by covalent bonds...keeps their own properties
A polar molecule
B. element
C. compound
D. molecule
Answers
Which of the following is the conjugate acid of H2P04- ?
A. HAP04
O B. PO 3-
O C. HP04-2
O D. H3PO4
Answers
Answer:
phosphoric acid H3PO4
The conjugate acid of H₂PO⁴⁻ is H₃PO₄. Therefore, option D is correct.
A conjugate acid is a species that is formed when a base accepts a proton (H⁺). It is the species that is one proton (H⁺) more acidic than the original base.
The base is the species that can accept a proton (H⁺), and the conjugate acid is the species that is formed when the base accepts the proton. The conjugate acid has one additional proton compared to the base.
Conjugate acids play an important role in acid-base reactions as they are formed when bases accept protons, and they can donate protons in subsequent reactions to regenerate the original base.
Learn more about conjugate acids, here:
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Find the percent of oxygen in CaClO3)2 Show your work
Answers
weight of oxygen (95.94g/mol) / weight of entire compound (206.98g/mol)
= 0.4635
Finally, to convert this to a percentage you multiply it by 100
0.4635 x 100 = 46.35% Oxygen by mass
What mass of ethanol will All
a 250.0 ml container if its
density is 0.789 g/ml?
Answers
Answer:
The answer is 197.25 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume = 250 mL
density = 0.789 g/ml
So we have
mass = 250 × 0.789
We have the final answer as
197.25 gHope this helps you
Why were enslaved Africans in high demand in the southern colonies?
Answers
Answer:
Slaves were in high demand in the southern colonies because they were the main source of labor. ... Bacon and others colonists wanted to take the Natives land.
Explanation:
HOPE THIS HELPED ❤✨
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FLINE JE PELENE BI
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SELFS EEE
BER
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0
Answers
Answer:
WOWKFBBAI9AIEHEBFKCOAKQQ
What is the frequency of an event?
Group of answer choices
Probability
Degree
Expected occurrence
Identification
Answers
hope this helps :)
Answer:
Probability
Explanation:
What element is the only Noble Gas in the s-block?
Answers
Answer:
Helium
Explanation:
Answer:
helium i guess i m not sure
Egg + Heat
Proof of a Chemical Reaction
Answers
Answer:
Water+Heat
proof of physical reaction
Explanation:
Chemical reactions are reactions that can't be undone ex cooking and egg.
Physical reactions are reactions that can be undone ex boiling water.
Answer:
Egg + Heat = Chemical Change
Explanation:
This is a chemical change because it cannot be undone. Once it changed its form you could not revert it back to its original self.
I hope this helps you! :)))))
Compounds are created when atoms of different elements _____.
1.form chemical bonds
2.have different chemical properties
3.form physical bonds
4.have similar chemical properties
Answers
Answer:
1.form chemical bonds
What happens if an organism cannot carry out its life function?
Answers
Answer:
organisms cannot stay with out getting nutrients as they will not be able to repair them selves or produce energy.
Explanation:
Which can change from one state of matter to another at the temperatures and pressures experienced at Earth’s surface?
oxygen
carbon dioxide
water
nitrogen
Answers
the number of protons will tell you what elements it is. T or F plzz help
Answers
Answer:
True
Explanation:
There are two ways to tell elements apart from each other: the atomic number or the number of protons. The atomic number tells the number of protons in the element.
For example:
There are two given elements. One has 3 protons and an atomic number of 3 while the other has 7 protons and an atomic number of 7. Which one is Lithium?
Lithium has an atomic number of 3, which means it has three protons, which means Lithium is the one with 3 protons.
K+ Cl2 → КСІ balance equation
Answers
Please answer correctly !!!!!!!! Will mark brainliest !!!!!!!!!!!!!!
Answers
Answer: uuhhhh pass
Explanation:
Answer:
It should be 0.8mL.
Explanation: Because you would subtract what the rock would be without the water.
[tex]5.6-4.8=0.8[/tex] Simple C:
The kinetic energy of a moving object depends on its mass and its
a. volume.
b. velocity.
c. distance.
d. acceleration.
Answers
A star's mass determines the —
A) shape of a Star
B) location of a star
C) length of its lifecycle
D) galaxy it belongs to
Answers
The maximum amount of statie friction between this chair
and the floor is 175 N.
Which action would cause the chair to move to the left?
A. Applying 100 N of force to the chair from the left
B. Applying 200 N of force to the chair from the left
O c. Applying 200 N of force to the chair from the right
O D. Applying 100 N of force to the chair from the right
Answers
C) applying 200 N of force to the chair from the right
Answer:
C
Explanation:
A p ex
1 point
Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?
Answers
Explanation:
Nitrogen-14 is the most abundant isotopes of Nitrogen.
Which of the following is NOT a characteristic of a compound?
A. has different properties from the elements that formed it
B. pure substance made of two or more elements
C. can be represented by a chemical formula
D. different samples have different properties
Answers
Answer:
I think it's D
sorry if I'm wrong.
Explanation:
Options that are not characteristics of compound in the question is D. different samples have different properties.
A compound can be regarded as a substance which is formed by chemical combination of two or more elements.Examples of compound are water ( H2O), Sodium chloride ( NaCl)Some of the properties of a compound are;
A compound will always has a different properties which is different from the properties of each of the elements making up the compound.A compound are formed as a result of two or more elements that combined chemically.A compound can be identified with its chemical formula.Therefore, option D is correct because a compound will only has its own properties not that
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The rows in the periodic table are called periods.
What is true about elements in the same period?
Answers
Answer:
elements in the same period have the same number of shells
the period number the element is in, that is the number of shells it has.
If a football is 625 mL volume and 0.64 g/mL density what is the mass
Answers
explanation
the formula for density is density equals mass divided by volume so you plug in .64 for the density and 625 for the volume. .64= m/625. to solve for mass you would multiply both sides by 625 to get the mass
Why is Graphite soft
Answers
Answer:
Graphite is soft because it has weak inter molecular forces between its layers.
If a sample of copper is 215g, how many moles of copper atoms are in the sample?
Answers
Answer:
3.38 moles.
Explanation:
The following data were obtained from the question:
Mass of copper (Cu) = 215 g
Number of mole of copper (Cu) =...?
The number of mole of copper (Cu) in 215 g can be obtained as follow:
Mass of copper (Cu) = 215 g
Molar mass of copper (Cu) = 63.55 g/mol
Number of mole of copper (Cu) =...?
Mole = mass /Molar mass
Mole of Cu = 215/63.55
Mole of Cu = 3.38 moles
Therefore, 3.38 moles of copper (Cu) is present in the sample.