Answers
b. 2HCl (aq) + Ca(OH)2 (s) —> CaCl2 (aq) + 2H2O (l)
i’m not sure about the rest but i hope this helped ^^
Answer:
i agree
Explanation:
Related Questions
Consider the balanced equation below.
Upper P Upper C l Subscript 3 Baseline + Upper C l Subscript 2 Baseline right arrow Upper P Upper C l Subscript 5.
What is the mole ratio of PCl3 to PCl5?
Answers
Answer: The mole ratio of [tex]PCl_3[/tex] to [tex]PCl_5[/tex] is 1: 1
Explanation:
According to the balanced chemical equation ,the number of atoms of each element has to be same on reactant and product side. The stoichiometric coefficients of the species represent their number of moles.
[tex]PCl_3+Cl_2\rightarrow PCl_5[/tex]
Thus in the reactants, there is 1 mole of [tex]PCl_3[/tex] and 1 mole of [tex]Cl_2[/tex] molecule. And thus there is 1 mole of [tex]PCl_5[/tex] in the product as well.
Thus the mole ratio of [tex]PCl_3[/tex] to [tex]PCl_5[/tex] is 1: 1
Which of these types of changes is a physical change?
A. Breaking apart one substance into two substances
B. Dissolving one substance in another
C. Changing one substance into another
D. Making a new substance
Please helpppp i'll love you forever
Answers
The correct answer is A. Can I get the Brainliest?
If You are given 14 moles of C2H5OH(Ethanol) and 13 moles of O2( Oxygen), how
many moles of the limiting reactant is produce? C2H5OH + O2 -> CH3COOH +
H2O
Answers
Explanation:
1 ) first u have to balance the equation but in this case it is already balanced.
2) checking for the limiting reactant:
13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol of H2O
14 mol of ethanol × (1mol H2O/ 1molof ethanol) = 14 mol of H2O
the less amount of moles produced from the O2 so the limiting reactant is oxygen
3) calculating the products moles
13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol
13 mol O2 × (1mol Ch3Cooh / 1mol O2) = 13 mol
note: the ratios obtained from the balanced equation
4) the excess reagent is the ethanol 1 mol will be remain
Which one of the following statements about orbitals is INCORRECT?
1) orbitals are regions in space where one is likely to find an electron
2) orbitals can hold up to two electrons
3) orbitals can hold two electrons provided they are spinning in the same direction
4) s, p, d and f orbitals are possible
Answers
3) orbitals can hold two electrons provided they are spinning in the same direction
We define an orbital in chemistry as a region in space where there is a high probability of finding an electron.
Each orbital holds a maximum of two electrons which spin in opposite direction according to Pauli exclusion principle.
According to this principle no two electrons can have the same set of quantum numbers. As a result, the spin quantum numbers of two electrons in the same orbital must differ hence they spin in opposite directions.
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Astatine-210 has a half-life of 8.08 days. What fraction of a sample of astatine-210 is left unchanged after 16.16 days?
Answers
Answer:
0
Explanation:
Given parameters:
Half-life = 8.08days
Unknown:
What fraction is left unchanged after 16.16days = ?
Solution:
The half - life of a substance is the time taken for the half of a radioactive material to decay to half.
Day 0 Day 8.08 Day 16.16
100% 50% 0% Parent
0% 50% 100% Daughter
After 16.16 days, non of the original sample will remain unchanged.
The emission spectrum of iodine is shown below. A line spectra with 2 purple lines, 6 blue lines, 3 light blue lines, 3 green-blue lines, 6 green lines, 8 yellow lines, 6 orange lines and 8 red lines. Which is the absorption spectrum? A line spectra with 4 purple lines, 6 blue lines, 3 light blue lines, 5 green-blue lines, 6 green lines, 7 yellow lines, 3 orange lines and 14 red lines. A line spectra with 6 purple lines, 9 blue lines, 6 light blue lines, 3 green-blue lines, 6 green lines, 2 yellow lines, 5 orange lines and 10 red lines. A line spectra with 2 black lines in purple, 6 black lines in blue, 3 black lines in light blue, 1 black line in green-blue, 10 black lines in green, 8 black lines in yellow, 6 black lines in orange and 8 black lines in red. A line spectra with 4 black lines in purple, 8 black lines in blue, 6 black lines in light blue, 3 black line in green-blue, 10 black lines in green, 4 black lines in yellow, 4 black lines in orange and 12 black lines in red.
Answers
Answer:
it's b
Explanation:
The emission spectrum which is a line spectrum of iodine consists of 6 blue lines as it absorbs yellow light.
What is emission spectrum?Emission spectrum is defined as a spectrum of a chemical compound or substance composed of frequencies of electromagnetic radiation. Radiations which are emitted while electron make transition from higher to lower energy level.
Energy of photon is equal to the difference between the two energy states . There are many possible electronic transitions in an atom and every transition has a specific wavelength.
Collection of different transitions with respect to different wavelengths makes up an emission spectrum.Emission spectrum of each element is unique and therefore spectroscopy is used to identify elements which are present in different substances.
Learn more about emission spectrum,here:
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Which statement best describes the particles in a sample of H2O in the solid phase?Immersive Reader
(10 Points)
They move very quickly and rarely interact.
They move very quickly and frequently collide.
They vibrate in place and have very weak bonds.
They vibrate in place and have very strong bonds.
Answers
Answer:
You can describe, the state, the color, the texture, and the odor of matter using your senses. ... As the motion of particles continues to increase, they move even farther apart. ... For example water is normally a liquid at room temperature. When it ... Gases have the most kinetic energy because their particles move very quickly.
Explanation:
Hopefully this helps!
Answer:
They vibrate in place and have very strong bonds.
Explanation:
All solids, in their form, have particles that vibrate in place and strong bonds to keep their form.
Chemical bonding is the combining of elementa to form
-energy levels
-atoms
-electrons
-compounds
Answers
When is electrolysis used to extract metal?
Answers
Answer:
Explanation:
electrolysis is the technique that use direct current to drive a non spontaneous chemical reaction chemical reaction is the gain or lose of electron this technique is use to extract metal from theirs ores
what is always true of a week acid??????
A) It only partially dissociates in solution.
B) It does not dissolve in water.
C) It contributes only one proton.
D) It has been diluted with water.
Answers
Answer:
I'm pretty sure it's A
Explanation:
Answer:
for the a p e x quiz:
it dissociates completely in solution.
Explanation:
a p e x
please show the work :(What is the estimated force applied to the box if the acceleration is .40 m/s2?
force (N) acceleration (m/s2)
10 .20
? .40
Answers
Answer:
20N
Explanation:
Given parameters:
Force(N) Acceleration(m/s²)
10 0.2
? 0.4
Unknown:
The force applied when the acceleration is 0.4m/s²
Solution:
From newton's second law of motion;
Force = mass x acceleration
Since we are using the same box, let us find the mass of the box;
Force = mass x acceleration
10 = mass x 0.2
mass = [tex]\frac{10}{0.2}[/tex] = 50kg
Now,
The force in the second instance will be;
Force = 50 x 0.4 = 20N
What wave properties do x-rays and gamma rays possess that cause them to have such high energy?
Answers
Answer:
Waves with a very short wavelength, high frequency and high energy
Explanation:
pls help me!!!!!!!
what are the elements found within the inner core of the earth??
im getting graded for this!! tyyyy
Answers
Answer:
Explanation:
iron
What role does the Automated Surface Observing Systems (ASOS) play in weather forecasting?
Answers
Answer:
What role does the Automated Surface Observing Systems (ASOS) play in weather forecasting? It is a system of radar sensors used to track storms. It is the nation's primary weather-observing network. It provides weather reports much like the National Weather Service.
Explanation:
Answer:
the answer is c).It is the nation's primary weather-observing network.
Explanation:
The _____ law of thermodynamics states that when two objects of different temperature are in contact, heat energy will flow from the hotter to the cooler object.
Answers
Answer:
Second.
Explanation:
There are four types or kinds of the laws of thermodynamics, but in this question we are actually considering the second law of thermodynamics.
The second law of thermodynamics, in a simple sense means that energies can flow in an equilibrate manner. It can also be stated as the total entropy of the universe. The second law is normal refer to as Law concerning Entropy.
Thus, filling the gap in the Question above. Note that the word written in capital letters is the missing word.
"The SECOND law of thermodynamics states that when two objects of different temperature are in contact, heat energy will flow from the hotter to the cooler object."
which of the following is an oxyanion?
Answers
Answer:
please give the answer choice.
Which statement best describes the process of the formation of the solar system?
Answers
Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material
What mass of water must be used to dissolve 0.500 kg C2H5OH to prepare a 3.00 m solution?
Answers
Answer:
500g Ika= 10.85 mol 500g (46.0699) - 10.35 mol - 3.00m - 13.62 kq 5.
Explanation:
Does this help?
A 3.00 M solution of [tex]C_2H_5OH[/tex] would be prepared by dissolving 0.500 kg of [tex]C_2H_5OH[/tex] in 3.62 kg of water.
Stoichiometric calculation0.500 kg [tex]C_2H_5OH[/tex] is equivalent to (mole = mass/molar mass):
500g/46.07 = 10.85 moles of [tex]C_2H_5OH[/tex]
3.00 M solution of [tex]C_2H_5OH[/tex] can be prepared by dissolving 10.85 moles in (molarity = moles/volume):
10.85/3 = 3.62 Liters of water
3.62 liters of water weighs (density = mass/volume);
1 x 3.62 = 3.62 kg
Thus, 3.62 kg of water will be required to prepare the solution.
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perience
How many significant figures does each of the following numbers contain?
11. 163.890
12. 00560
13. 156, 100
14. 906,301
15. 6.022 x1023
16. 5.60 x 10-5
Dorform the fol
Answers
Answer:
11
Explanation:
some safety precautions people should take when using fireworks
Answers
Answer:
Do not try to re-light or handle malfunctioning fireworks. Soak both spent and unused fireworks in water for a few hours before discarding.
The diagram below shows a longitudinal wave at one instant in its motion. Each oval represents a particle acted on by the energy of the wave as it moves from left to right.
Which line on the diagram indicates a region of rarefaction?
Answers
Answer:
Here now you can give the other person the brainly they deserve and they were right too :)
Explanation:
The line that has been the representation of the region of rarefaction in the diagram has been the line below the top line.
The diagram has been the representation of the movement of the particles under the influence of wave energy. The particles have been moving from left to right in the longitudinal order with a gain of energy.
The rarefaction has been the instance where the density of the waves has been lesser or where there has been one wavelength of the wave.
The diagram has been representing, at the line below the top arrow, there have been lesser density of the wave particles, thus, the region of rarefaction has been the instance in the lines below the top line.
For more information about the rarefaction, refer to the link:
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this is a lot of points and I will give brainlets for the correct answer
Answers
Answer:13132
Explanation:123123
Choose the balanced chemical equation below that best represents the following reaction:
When baking soda (NaHCO3) reacts with hydrochloric acid (HCl), carbon dioxide bubbles (CO2) are created, along with water (H2O) and sodium chloride (NaCl).
NaCl + H2O → NaHCO3 +CO2 + HCl
CO2 +H2O + NaCl → NaHCO3 + HCl
NaHCO3 + HCl → CO2 + H2O + NaCl
HCl + NaCl + H2O → NaHCO3 +CO2
Answers
The balanced chemical equation :
NaHCO₃ + HCl → CO₂ + H₂O + NaCl
Further explanationA balanced chemical reaction shows that the number of atoms of the reactant and the number of atoms of the product is the same
When baking soda (NaHCO3) reacts with hydrochloric acid (HCl), carbon dioxide bubbles (CO2) are created, along with water (H2O) and sodium chloride (NaCl) .
This statement shows that
Reactants (located to the left of the reaction)
Baking soda (NaHCO₃) and Hydrochloric acid (HCl)
product (located to the right of the reaction)
Carbon dioxide(CO₂),water (H₂O) and Sodium chloride (NaCl).
So the reaction :
NaHCO₃ + HCl → CO₂ + H₂O + NaCl
The “rise” of the muffin is caused by the release of ___________ gas trapped in the mix as it is heated. carbon dioxide hydrogen oxygen helium
Answers
Answer:
Carbon dioxide
Explanation:
In the making of the muffins, there are many ingredients are used including flour, egg, butter, sugar, and flavoring of fruits. There is also a raising agent, the baking powder or baking soda used that reacts with the batter.
This reaction form bubbles of carbon dioxide, trapped in the air spaces during the baking and muffin raises. Carbon dioxide makes muffins light, by lifting the batter as it bakes.
what happens to molecules when the temperature drops or lowers
A the molecules stop moving
B the molecules get closer together
C the molecules start moving faster
D the molecules become smaller
Answers
Which number is the same as 4.8 x104
a. 0.00048
b. 480000
C. 48000
d. 480
Answers
Answer:
I'm Pretty Sure It Would Be C
Answer:
C it is yeah...°∆°
Explanation:
......
Atoms of two different elements must have different
Answers
Answer:
Atoms of two different elements must have different atomic numbers.
Explanation:
what are the 3 types of bonds in chemistry? and how can you tell when a chemical has that bond?
Answers
Answer:
Ionic bonding, Covalent bonding, Metallic bonding.
» My memory
A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds. » Wikipedia
Which electron notation is incorrect?
1s 2s 2p 3s 3p 10
1s 2s 2p 3s 3p3
1s2 282 2p 3s 3p6
Answers
Which chemical equation below is balanced to follow the Law of Conservation of Mass?
H2 + Cl2 + HCl
o 2 H2 + Cl2 + 3 HCI
2 H2 + 2Cl2 → 2 HCI
H2 + Cl2 → 2 HCI
Answers
Answer:
Balanced Equation
H₂ + Cl₂ → 2HCI
Answer:
Balanced Equation
H₂ + Cl₂ → 2HCI
Explanation:
i did it and 100%