Answer:
1. The balanced equation is given below:
Sn (s) + 2HCl (aq) –> SnCl₂ (aq) + H₂ (g)
2a. H is oxidized.
2b. Sn is reduced.
Explanation:
1. Balanced equation for the reaction between tin (Sn) metal and aqueous hydrochloric acid (HCl) to produce tin(II) chloride (SnCl₂) and hydrogen gas (H₂).
This is illustrated below:
Sn (s) + HCl (aq) –> SnCl₂ (aq) + H₂ (g)
There are 2 atoms of Cl on the right side and 1 atom on the left side. It can be balance by putting 2 in front of HCl as shown below:
Sn (s) + 2HCl (aq) –> SnCl₂ (aq) + H₂ (g)
Now, the equation is balanced
2. Determination of the element that is oxidize and reduced.
This can be obtained as follow:
We shall determine the change in oxidation number of each element.
NOTE:
a. The oxidation number of H is always +1 except in hydrides where it is –1.
b. The oxidation state of Cl is always –1.
Sn (s) + 2HCl (aq) –> SnCl₂ (aq) + H₂ (g)
For Tin (Sn):
Sn = 0
SnCl₂ = 0
Sn + 2Cl = 0
Cl = – 1
Sn + 2(–1) = 0
Sn – 2 = 0
Collect like terms
Sn = 0 + 2
Sn = +2
Therefore, the oxidation number of Tin (Sn) changes from 0 to +2
For H:
H = +1
H₂ = 0
The oxidation number of H changes from +1 to 0
For Cl:
Cl is always –1. Therefore no change.
Summary:
Element >>Change in oxidation number
Sn >>>>>>>From 0 to +2
H >>>>>>>>From +1 to 0
Cl >>>>>>>No change
Therefore,
Sn is reduced since its oxidation number increased from 0 to +2.
H is oxidized since it oxidation number reduced from +1 to 0
The balanced chemical equation for the reaction is
Sn(s) + 2HCl(aq) → SnCl₂(aq) + H₂(g)
and the element that oxidized is tin (Sn) while the element that is reduced is hydrogen (H)
The balanced chemical equation for the reaction where tin metal reacts with aqueous hydrochloric acid to produce tin(II) chloride and hydrogen gas is
Sn(s) + 2HCl(aq) → SnCl₂(aq) + H₂(g)
From the equation,
The element that is oxidized is tin (Sn), because the oxidation state of Sn increased from 0 to +2
The element that is reduced is hydrogen (H), because the oxidation state of H decreased from +1 to 0.
Hence,
The balanced chemical equation for the reaction is
Sn(s) + 2HCl(aq) → SnCl₂(aq) + H₂(g)
and the element that oxidized is tin (Sn) while the element that is reduced is hydrogen (H).
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Need help plz fast it’s science
Answer:
Photosynthesis, cytoplasm, cell wall, plastid, mitochondrion
Explanation:
Highlands are:
A.The tall mountains thrown up by the impact of meteors with the Moon
B.Areas of lava flow
C.Impact sites of meteors on the surface of the Moon
D.The original surface crust of the Moon
what is the ionic formula for potassium and chlorine
You find a clear gem that is made of one substance. What could you do to
identify whether the gem is a diamond?
Answer:
You could have a scratch test, fog test, break test, theres many tests you could perform to see if it is a diamond.
Explanation:
8.
188 W
188
75
Re
+
74
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
When calculating percent error, the accepted value is in the denominator
True or false
Answer:
True
Explanation:
What is the last energy level of N? Mg?
Answer:
2
3
Explanation:
To infer the last energy of the given atoms, we need to write their electronic configuration:
For N = 1S² 2S² 2P³
Mg = 1S² 2S² 2P⁶ 3S²
The energy levels are usually designated as;
n = 1
n = 2
n = 3
n =4
For N, the last energy level is 2
Mg, the last energy level is 3
We can also determine this number by the periods the atoms can be found.
Add 92.2 km to 9426 m and report the answer in
km.
92.2 km + 9426 m =
km
Help me plz
to convert m into km we have to divide it by 1000.so,
9426/1000=9.426km
92.2km+9.426km=101.626km.
Answer:101.6
Explanation:
Valence electrons determine blank
Answer:
the element's chemical properties and whether it may bond with other elements.
Explanation:
Answer question number 6
How many atoms are in the following formula?
3Al2O3
Answer:
15 atoms total
Explanation:
2 Al atoms + 3 O atoms = 5 Al2O3 atoms
5 Al2O3 atoms * 3 = 15
another way to do it is:
2 Al atoms * 3 = 6 Al atoms
3 O atoms * 3 = 9 O atoms
6+9 =15 atoms total
The number of atoms in the given 3Al₂O₃ is 15 atoms.
What are atoms?Atoms are the smallest unit of every matter. It contains charged particles present inside the atoms. They are electrons, protons, and neutrons. Atoms are of four types, description, isotopes, radioactive, and ions.
These atoms are the ions, that are charged, and the charged ions make bonds with each other to form compounds. Aluminum oxide is a compound that is formed by combining aluminum and oxygen atoms.
The compound is 3Al₂O₃
This means there are three moles of aluminum, and three moles of oxygen.
2 Al atoms + 3 O atoms = 5 Al₂O₃ atoms
5 Al₂O₃ atoms x 3 = 15
The elaborative way is:
2 Al atoms x 3 = 6 Al atoms
3 O atoms x 3 = 9 O atoms
6 + 9 =15 atoms total
Thus, the number of atoms is 15 atoms.
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Identify the choice that best completes the statement or answers the question.
Banana slugs live on the ground in moist forests of the Pacific Northwest. They consume and
break down a variety of materials, including small dead animals and rotting leaves. Which
term describes banana slugs?
O carnivores
O consumers
O decomposers
O producers
PLEASE HELP!!!
Can someone help me quickly?
When exposed to very high temperatures, metals like iron can be turned into fluids that flow and can be poured into molds. What happens within the iron to allow it to flow?
A) The energy of the solid decreases, and the particles begin to collide with high frequency
B)The energy of the solid increases, and the particles begin to slide past each other
C)The solids collide at an increasing rate until reaching equilibrium energy
D)The particles vibrate about equilibrium in an effort to minimize energy
Answer: B) The energy of the solid increases, and the particles begin to slide past each other.
Explanation:
The energy of the solid matter is required to be increased so that molecules of the solid matter get separated from each other and an transition from solid matter to liquid matter occurs. The liquid components of the matter will slide past each other as they have obtain energy for fluidity. The liquid iron can be molded into any shape and the energy decreases considerably.
A rock mass is 100g. Determine the density of the rock if it has a volume of 20cm3.
Answer:
The answer is 5.0 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 100 g
volume = 20 cm³
We have
[tex]density = \frac{100}{20} = \frac{10}{2} \\ [/tex]
We have the final answer as
5.0 g/cm³Hope this helps you
If a p-wave arrives at 2:10:00 and the s-wave arrives at 2:15:20, how many kilometers from the epicenter is a location?
Answer:
2.67 x 10⁷km
Explanation:
Given parameters:
Time of arrival of p-waves = 2: 10: 00
Time of arrival of s-waves = 2: 15: 20
Unknown:
Distance of wave from epicenter = ?
Solution:
To find the distance of the wave from the epicenter;
Distance = 3 x 10⁸ x time interval
Time interval = Time of arrival of p-waves - Time of arrival of s-waves
= 2: 10: 00 - 2: 15: 20
= 5min 20s
= 320s
Now, we need to convert the time to hrs;
3600s = 1hr
320s = [tex]\frac{320}{3600}[/tex] = [tex]\frac{4}{45}[/tex]hr
So,
Distance = 3 x 10⁸ x [tex]\frac{4}{45}[/tex] = 2.67 x 10⁷km
help please this is due at 2!!
Answer:
I believe the answer is C (3)
Explanation:
In an atom usually electrons number and protons number is equal.
Here lithium atom has three protons
So it has three electrons، too.
An object accelerates 16.3 m/s2 when a force of 4.6 Newton’s is applied to it. What is the mass of the object?
A= .28 kg
B=74.98
C=3.8 kg
D= just to heavy to calculate
Answer:
A=0.28kg
Explanation:
FORCE=MASS * ACCELERATION
4.6=m*16.3
Then make m the subject.
m=4.6/16.3
m=0.28kg
arrangement of small particles in substance is
Answer:
The particle model represents particles by small, solid spheres.It describes the arrangement, movement and energy of particles in a substance. The model can be used to explain the physical properties of solids, liquids and gases.
Answer:
The particle model represents particles by small, solid spheres. ... It describes the arrangement, movement and energy of particles in a substance. The model can be used to explain the physical properties of solids, liquids and gases.
Explanation:
Which components are part of all scientific investigations? Check all that apply.
Answer:
Steps of a scientific investigation include 1. make observation
2. ask a question
3. form a hypothesis
4. test the hypothesis
5. analyze results
5 , drawing conclusions,
6. and communicating the results
If N gains two electrons, which of the following elements would it be isoelectronic with
A) C
B) S
C) B
D) F
Answer: it’s D
yup!:)
If nitrogen gains two electrons, it becomes isoelectronic with fluorine.
There are five electrons on the outermost shell of nitrogen and a total of seven electrons in the atom. Recall that isoelectronic species are species that have the same number of electrons.
Fluorine is an element in group seventeen. There are nine electrons in fluorine. If nitrogen gains two electrons, it becomes isoelectronic with fluorine.
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An organism that has two identical alleles (like two capital “T’s” or two lowercase “t’s” for example) is called
Answer:
h, o, m, o, z, y, g, o, u, s
Explanation:
h, o, m o z y g o u s- T, T or t, t
H, e, t e r o z y g o u s- T, t
I put the commas there so it would let me submit, because it said I put bad words for some reason...
ANSWER WITHOUT THE COMMAS LOL
Write the correct electron configurations for the following:
ments
ions
• Na (atomic # 11)
• Fe (atomic # 26)
• As (atomic # 33)
• F (atomic #9)
• Co (atomic #27)
• Ag (atomic # 47)
• K (atomic # 19)
• Cu (atomic # 29)
• Si (atomic # 14)
Answer:
Ag
Explanation:
atomic 33 because it what what sence
An unknown metal cation (alias, M) contains 26 total electrons. It forms an ionic compound
with sulfide with the formula MS. What is the symbol of the cation?
*When writing the cation, write the symbol, put in 1 space, then the charge.
Example: Fe2+ would be written Fe 2+
Answer:
sulfide is S 2- so it will be M 2+
3.4 moles of CO to liters?
Answer:
76.2 L of [tex]CO_{2}[/tex]
Explanation:
Converting the unit of moles to liters is very easy if you know the value of a mole to a liter. Remember that 1 mole is equivalent to 22.413962 L.
Step 1:
3.4 mol [tex]CO_{2}[/tex] x 22.413962 [tex]\frac{liters}{mole}[/tex] = ?
Step 2:
Cancel out the moles.
Step 3:
If you multiply 3.4 by 22.413962, the answer is 76.2
Step 4:
Don't forget to put the units every time you answer. So the answer is: 76.2 L of [tex]CO_{2}[/tex]
what is the formula for sulfuric acid
Answer:
H₂SO₄
Explanation:
Hope this helps!
Rain exist in which phase
Answer:
WATER!!!!!
Explanation:
hope it helps
Which element is this.Its shiny,Is solid at room temperature, has atoms with two valence electrons?A:Lithium B:Strontium C:Aluminium D:Silicon
Answer:
Strontium
Explanation:
STRONTIUM
Strontium is a chemical element that is non radioactive and its occur naturally. It is a shiny and silvery white metal that have atomic number of 38 and it belong to group 2 member of the periodic table which is why it have two valence electrons. It is a solid metal at room temperature.
About 99% of Strontium is found in bones. It help to make new bones in humans by replacing the old bones.
Therefore, it is strontium.
Strontium is the element which is shiny, solid at room temperature and has two electrons in its outermost shell.
The atomic number of Strontium is 38. In the first shell, there are two electrons, in the second and fourth shell has space for 8 electrons so these shells are filled with electron whereas third shell has 18 electrons and the fifth shell has 2 electrons. Strontium belongs to second group i.e. alkaline earth metals due to which it has two valance electrons in its outermost shell.
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How to separate these pure substance?if it is not possible, please write cannot be separate
Oxgen
Water
Gold
Carbon Dioxide
Carbon
Answer:
Oxgen- cannot be separated
Water - chemical change
Gold - cannot be separated
Carbon Dioxide - chemical change
Carbon - cannot be separated
Explanation:
A pure substance, which can either be an element or a compound, contains only one type of such element or compound. In opposition to a mixture, pure substances cannot be separated by physical means.
- Elements as a pure substance cannot be separated because it contains only one type of atom. However, compounds contain two or more types of atoms, and hence, can only be separated into its individual atoms via chemical means.
In this question, oxygen (O2), Gold (Au) and carbon (C) are all elements and hence cannot be separated. Carbon dioxide (CO2) and water (H2O) are compounds because they contain two different atoms respectively, hence, can be separated into individual atoms.
Which statement about the masses of subatomic particals is true?
A. Electrons and neutrons have similar masses.
B. Neutrons and protons have similar masses.
C. Electrons, protons and neutrons have similar masses.
D. Electrons, protons and neutrons have very diffren´t masses.