Answer:
Molecular equation: BaCl₂(aq) + Na₂CO₃(aq) ---> BaCO₃(s) + 2NaCl(aq)
Complete ionic equation: Ba²⁺(aq) + 2Cl⁻ + 2Na⁺(aq) + CO₃²⁻(aq) ---> BaCO₃(s) + 2Na⁺(aq) + 2Cl⁻(aq)
Net Ionic equation: Ba²⁺(aq) + CO₃²⁻(aq) ---> BaCO₃(s)
Molecular equation: 2KOH(aq) + H₂SO₄(aq) ---> K₂SO₄(aq) + 2H₂O(l)
Complete ionic equation: 2K⁺(aq) + 2OH⁻(aq) + 2H⁺(aq) + SO₄²⁻(aq) ---> 2K⁺(aq) + SO₄²⁻(aq) + 2H₂O(l)
Net ionic equation: 2OH⁻(aq) + 2H⁺(aq) ---> 2H₂O(l)
Explanation:
The reaction that occurs when aqueous solutions of BaCl₂ and Na₂CO₃ are mixed together to produce a white solid is known as a double displacement reaction.
Molecular equation: BaCl₂(aq) + Na₂CO₃(aq) ---> BaCO₃(s) + 2NaCl(aq)
Complete ionic equation: Ba²⁺(aq) + 2Cl⁻ + 2Na⁺(aq) + CO₃²⁻(aq) ---> BaCO₃(s) + 2Na⁺(aq) + 2Cl⁻(aq)
Net Ionic equation: Ba²⁺(aq) + CO₃²⁻(aq) ---> BaCO₃(s)
The reaction between aqueous solutions of KOH and H₂SO₄ is a neutralization reaction.
Molecular equation: 2KOH(aq) + H₂SO₄(aq) ---> K₂SO₄(aq) + 2H₂O(l)
Complete ionic equation: 2K⁺(aq) + 2OH⁻(aq) + 2H⁺(aq) + SO₄²⁻(aq) ---> 2K⁺(aq) + SO₄²⁻(aq) + 2H₂O(l)
Net ionic equation: 2OH⁻(aq) + 2H⁺(aq) ---> 2H₂O(l)
Two atoms that are different isotopes of the same element have
Two atoms that are different isotopes of the same element have same number of protons.
What are elements?Element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Each element has atoms which are unique to itself.
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What are some structural adaptations of adult frogs that help them survive in their environment?
Explain how each adaptation helps the frogs.
Answer:
Well I think that the frogs ability to breath underwater is a adaptation to help them from prededors. Also, they have camophlage to help too.
A rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water in it. The water level rose to 35 mL calculate the density of the rock in g/mL
Answer:
14
Explanation:
70g/(35mL-30mL)=14g/mL
If a rock with a mass of 70 grams is dropped into a graduated cylinder with 30 milliliter of water in it. The water level rose to 35 milliliters, then the density of the rock in gram / milliliter would be 14 gram / milliliter.
What is density?It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.
The mass of ṭhe rock = 70 grams
The volume of the rock = 35 milliliters - 30 milliliters
= 5 milliliters
The density of the rock = mass of the rock / volume of the rock
=70 grams / 5 milliliters
= 14 gram / milliliter
Thus, the density of the rock would be 14 gram / milliliter.
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What is the volume in liters of 222 g of neon if neon has a density of 0.900 g/L?
Answer:
[tex]V=247L[/tex]
Explanation:
Hello there!
In this case, since the density is defined as the degree of compactness of a substance and is computed by diving the mass over the volume it occupies:
[tex]\rho =\frac{m}{V}[/tex]
Given the density and the mass of the neon, we can compute its density as shown below:
[tex]V=\frac{m}{\rho} =\frac{222g}{0.900g/L}\\\\V=247L[/tex]
Best regards!
The volume of neon in liters is 246.67 L.
To calculate the volume of neon, we use the formula below.
Formula:
D = m/V............... Equation 1Where:
D = Density of neonm = mass of neonV = Volume of neon.make V the subject of the equation.
V = m/D............... Equation 2From the question,
Given:
m = 222 gD = 0.900 g/LSubstitute these values into equation 2
V = 222/0.9V = 246.67 L.Hence, The volume of neon in liters is 246.67 L.
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A. Liquid water can change shape, but water vapor cannot.
B. Both liquid water and water vapor have definite volume.
C. Water vapor is less dense than liquid water.
D. Particles of water vapor have less energy than particles of liquid water.
Answer: c
because gasses are less dense than liquids
I need the answer to this multiple-choice
What is an example of a gas in motion and a fluid in motion?
Answer:
Gas in motion : Vaporization
Examples of fluid flow :
A river flowing down a mountainAir passing over a bird's wingBlood moving through a circulatory systemFuel moving through an engine.Explanation:
The electron configuration of aluminum, atomic number 13, is (Ne) 352,
3p1. Aluminum is in period...
3
2
13
6
Answer:
Aluminium is in period number 3
The aluminum is placed in period 3 of the periodic table.
What is period?Periods are the seven horizontal rows that make up the periodic table. Periods are the horizontal rows in the periodic table. Each period represents the consecutive occupation of orbitals in an atom's valence shell, also with long periods representing the occupation of orbitals in a d subshell.
What is periodic table?The periodic table could be thought of as a visualization of the elements, from which it is simple to determine the physical and chemical properties of any given element.
It is given that, electronic configuration of aluminum is [tex][Ne]3s^{2},3p^{1}[/tex].
It can be seen that last electrons enter in 3p orbital , here 3 tells about the period of the element where it will be placed in periodic table.
Therefore, aluminum will be placed in period 3.
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Check all that apply
Use tongs to remove
hot items
Touch the surface.
t
Turn off after use
Answer:
1 and 3
Explanation:
i hope this helps it was an instruction on edge
Answer:
It's 1, Use tongs to remove hot items and 2, Turn off after use
Explanation:
On Edge 2021
Will give brainliest, Look at the graph above. Compare it to the periodic table. What do you notice about the location on the periodic table of the elements that represent the high points
Answer:
We can see that the atomic radius decreases across every row.
Explanation:
I will comment more below.
The elements that represent the highest points on the graph are all elements of group 1 and occur at the head of the period to which they belong.
The periodic table is an arrangement of elements in groups and periods. The elements in the same group have the same number of valence electrons while the elements in the same period have the same number of shells.
Looking at the graph, we can see that the high points in the graph all correspond to the group 1 elements; sodium, potassium, rubidium and cesium.The have the highest atomic radii in the period. Atomic radii increases down the group but decreases across the period. Remember that these elements are at the head of the period to which they belong hence they have the highest atomic radii.
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What is the mass of CO2 lost at 20 min from the limestone sample?
How much CO2, in moles, was lost at 20 min from the limestone sample?
How much CO3 2- was lost at 20 min from the limestone sample?
Answer:
The mass, CO2 and CO3 from the limestone sample is discussed below in details.
Explanation:
(A) mass loss of sample of limestone after 20 min
= 0.8437g-0.5979g = 0.2458 g
From the given reaction of limestone, 2 mol of the sample gives 2 moles of CO 2.
Therefore
184.4 g ( molar mass of limestone) gives2× 44 g of carbon dioxide.
1 g of sample gives 88/184.4 g of carbon dioxide
Hence 0.2458 g sample gives
= 88/184.4 × 0.2458 g = 0.117 g carbon dioxide
(B) mole of CO 2 lost = weight/ molar mass
= 0.117 g / 44 g/mol =0.0027 mole
(C). 1 mol of limestone contain 2 mol of carbonate ion
From the reaction we know that carbonate ion of limestone is converted into carbondioxide
Hence lost carbonate ion = 0.2458 g
(D) we know that
1 mol limestone contain 1mol CaCO 3
Hence in sample present CaCO 3
= 1mole / 184.4 g × 0.8437 g= 0.00458 mol CaCO3
what is salt
explinnn hhhhhh hh hh
Answer:
salt is a very well known seasoning
Explanation:
hope this helped :)
Calculate the volume of a liquid with a density of 5.45 g/mL and a mass of 65 g.
Answer:
The answer is 11.93 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question we have
[tex]volume = \frac{65}{5.45} \\ = 11.926605...[/tex]
We have the final answer as
11.93 mLHope this helps you
7th grade help me plzzzzz
Answer:
A & B
Explanation:
The answer for the first one is A because the proton is found in the nucleus with the neutron
The answer for the second was is B because the Neutrons, protons and electrons are all subatomic particles, as they are the main particles that make up an atom.
Proton = Positive Charge (+)
Neutron = Neutral charge (=)
Electron = Negative Charge (-)
Answer:
1- positive
2- A
3-A
Explanation:
The reaction of zinc metal and hydrochloric acid produces hydrogen gas and zinc chloride. Write the balanced chemical equation. Phases are optional.
Answer:
Zn + 2HCl -----> ZnCl₂ + H₂
Explanation:
The balanced chemical equation for Zn with hydrogen is Zn + 2HCl ---> ZnCl₂+ H₂.
What is balanced chemical equation?
A balanced chemical equation is one in which number of reactant is equal to number of products. When Zinc reacts with hydrogen it will form zinc chloride and hydrogen gas.
Here, 1 molecules of hydrochloric acid are participating in the process, and 1 molecules of hydrogen are being created.
Therefore, The balanced chemical equation for Zn with hydrogen is Zn + 2HCl ---> ZnCl₂+ H₂.
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A scientist who collects and analyzes DNA from a crime scene is a
Answer:
forensic scientist
Explanation:
forensic science is the discipline in which professionals use scientific means to analyze physical crime evidence. this evidence is then presented in court in order to help determine the innocence or guilt of a specific suspect.
Answer:
Its a forensic scientist :D
Explanation:
I took a test and got it wrong but it showed the right answer and its a forensic scientist
(don't ask how i got it wrong i was rushing!!)
PLEASE HELP!! Circuit A consist of two wires and a battery. Circuit B consist of the same strength battery and the same type of wires, but it also contains a light bulb. Which circuit has more resistance?
Answer:
light bulb B
Explanation:
more resistance
Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water H2O and carbon dioxide CO2 chemically react to form the simple sugar glucose C6H12O6 and oxygen gas O2.
What mass of water is consumed by the reaction of 6.49g of carbon dioxide?
ANSWER:
2.65 g H2O
Explanation:
6.49g (co2) / 44.009g (co2) x 1 mol (co2) / 1 mol (h2o) x 1 mol (h2o)
=0.147 mol H2O
0.147 mol (H2O) / 1 mol (h2o) x 18.015 g (h2o)
=2.65 g H2O
why was the royal society of london formed
Answer:
..............what.......
What are the signs of ΔH, ΔS, and ΔG for the spontaneous conversion of a crystalline solid into a gas?
Answer:
ΔH>0, ΔS>0, and ΔG<0
Explanation:
Crystalline solid → Gas
ΔG < 0 T as the reaction is Spontaneous The solid is converted into gas so the Entropy will increase as randomness is more in gas than solid, ΔS > 0using Gibbs equation
ΔG = ΔH - TΔS
as ΔG < 0 and ΔS > 0
ΔH - TΔS <0
ΔH < TΔS ⇒ΔH >0
This gives that ΔH will be Positive but it will be less than TΔS. So we need to provide some energy to convert crystalline solid into gas.
Which letter? Thanks in advance!
Answer: b
Explanation:
Which energy transformation produces electricity and is least likely to negatively impact the environment?
Generating electricity from a natural gas-fired power plant
Generating electricity from a natural gas-fired power plant
Generating electricity from a coal-fired power plant
Generating electricity from a coal-fired power plant
Generating electricity from a nuclear power plant
Generating electricity from a nuclear power plant
Generating electricity from a solar panel system
Generating electricity from a solar panel system
electricity from solar panels
Explanation:
All other options produce something after or during the time electricity is made. That something is gas. Not solar
Which substance is heatergeneous mixture
A. Pure olive oil
B. A sugar cube
C. Chicken noodle soup
D. Liquid dishwashing soap
Answer:
The answer is A
Explanation:
I am Mr. Know It All
how an ionic compound made up of charged particles can be electrically neutral
Answer:
Explanation:
Ionic compounds are electrically neutral because the charges of the cations and anions that make up the compound cancel each other out. In the case of salt for example, sodium has a charge of positive one, and chloride has a charge of negative one. Together, they neutralize the compound.
please help 10 points asap
Answer:
opposite
Explanation:
Answer:
opposite
Explanation:
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Chemistry a sugar solution contains 26g of sugar in .50 l of solution. What is the concentration
Answer:
b cause it say sit
Explanation:
njj
please tell me which one?
Answer:
i think its c
Explanation:
How and why was the periodic table set up?
What evidence should Mitchell collect to BEST support the second law of thermodynamics?
Answer:
The Second Law of Thermodynamics poses an insurmountable problem for ... More time will make things worse for the Darwinist, not better. ... error fail-safe and proof-reading devices utilized for quality control, assembly ... No one really supports the idea that the sun + non life = life
Explanation:
According to the second law of thermodynamics, the energy of the universe is conserved but the entropy of the universe is continuously increasing.
What is the second law of thermodynamics?The second law of thermodynamics put some restrictions on the direction of heat transfer and attainable efficiencies of heat engines. This law stated that any spontaneously happening process will lead to an escalation in the entropy (S) of the universe.
This law explains that the entropy of an isolated system will never decrease with time. Mathematically, the 2nd law of thermodynamics:
ΔS (universe) > 0
where ΔS of the universe is the change in the entropy of the universe.
The second law of thermodynamics provides the criterion for the feasibility of any physical or chemical process. A physical or chemical process cannot take place unless it must follow both the 1st and 2nd laws of thermodynamics.
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Steps in a Nerve Impulse diagram
Answer:
..Repolarization. 2
1 Action potential. Unlike a graded potential, an action potential is capable of traveling long distances. ..
3 Hyperpolarization. ..
4 Refractory period.
Explanation:
