Did you ever get the answer
Which of the following preparation of salt is incorrect? *
Acid + alkali
Acid + hydrogen
Acid + carbonate
Acid + metal oxide
Answer:
acid + hydrogen
Explanation:
gives a good combination
Which of the following diatomic gases has the shortest bond between its two atoms?
A. HI
B. O2
C. CI2
D. N2
If Earth is in between the sun and the Moon in both Image 1 and Image 2, why do you think a lunar eclipse is only happening in Image 2?
Answer: well I don’t have either picture but here goes anyway. It could be that the suns rotation matched up with the moon being 400 miles away from it and 400 times bigger it could be in image 1 the sun is only at a partial eclipse. With no images kinda had to wing it but I hope it helps :D
A lunar eclipse is an event that occurs when the sun, moon, and earth are aligned. It is happening in image 2 as Earth is obstructing the sun’s light.
What is a lunar eclipse?In lunar eclipse Earth completely covers the surface of the moon which makes the surface look red and dark. It happens only when the Moon is opposite the sun in the sky.
It is not seen in the first image as the earth is incapable of totally blocking the sunlight and hence does not result in a lunar eclipse. In the second image, the Earth has covered the whole surface of the moon and hence is blocking the sunlight.
Therefore, a lunar eclipse is seen only in image 2.
Learn more about the lunar eclipse here:
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How is energy transferred in a chemical reaction
Answer:
Answer
Explanation:
All chemical reactions involve energy. Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Endothermic reactions absorb energy, and exothermic reactions release energy. The law of conservation of energy states that matter cannot be created or destroyed.
The process of an element breaking down over time, allowing geologists to get the absolute age is called _________.
Answer:
radioactive decay
Explanation:
Which is not a critical part of collision theory?
orientation
energy
amplification
collisions
Answer:
Amplification
Explanation:
What is the molality of a solution made with 5.6kg of water and 2.11moles of solute?
Answer:
THE MOLARITY IS 2.22 MOL/DM3
Explanation:
The solution formed was as a result of dissolving 37.5 g of Na2S in 217 g of water
Relative molecular mass of Na2S = ( 23* 2 + 32) = 78 g/mol
Molarity in g/dm3 is the amount of the substance dissolved in 1000 g or 1 L of the solvent. So we have;
37.5 g of Na2S = 217 g of water
( 37.5 * 1000 / 217 ) g = 1000 g of water
So, 172.81 g/dm3 of the solution
So therefore, molarity in mol/dm3 = mol in g/dm3 / molar mass
Molarity = 172.81 g/dm3 / 78 g/mol
Molarity = 2.22 mol/dm3
The molarity of the solution is 2.22 mol/dm3
Explanation:
What mass of methane gas (CH4) is required in order to follow the Law of
Conservation of Mass?
Answer:
2.3g
Explanation: my mom is a teacher
CH₄ + 2O₂ → CO₂ + 2H₂O For this reaction the mass of methane gas (CH4) is required in order to follow the Law of Conservation of Mass is 2.3 gram. Therefore, option D is correct.
What is the Law of Conservation of Mass ?The Law of Conservation of Mass states that the total mass of the reactant is exactly equal to the total mass of the product.
It is also state that in a chemical reaction mass is neither created nor destroyed. For example, the carbon atom in coal gets carbon dioxide when it is burned.
This law is important in understanding and production of various chemical reactions. If researchers experience the identities alongside the quantities of the reactants for any particular reaction.
According to the Law of Conservation of Mass, In given combustion reaction to obey this law the mass of reactant is 2.3 grams.
Thus, option D is correct.
To learn more about the Law of Conservation of Mass, follow the link;
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Which compound is produced by a neutralization?
H2O(l)
HNO3(aq)
H3PO4(aq)
Ca(OH)2(s)
Explanation:
HNO3(aq) is the compound produced by a neutralization
8. Shanice made a list about alkali metals.
Alkali Metals
Jose one electron
are found in
group one
include elements
Li, Na, and K
ions will have a
negative one
charge
Shanice made a mistake on her list. Which
best describes the mistake Shanice made?
A. Alkali metals do not lose one electron,
they gain one electron
B. Alkali metals are not found in group one;
they are found in group two.
C. Alkali metals do not include elements Li.
Na, and K, they include Al, Si, and P.
D. Alkali metal ions will not have a negative
one charge; they will have a positive one
charge
Answer:
D. Alkali metal ions will not have a negative one charge; they will have a positive one charge
Explanation:
Alkali metals are a found towards the left hand side of the periodic table. The comprise of Li, Na, K, Rb, Cs and Fr.
They form univalent positive ions such as Cs^+, Na^+ etc. They do not form negative ions but give out one electron to form the sort of ions stated above. Recall that metals are electropositive in nature (donate electrons).
The mistake made by Shanice is to say that group 1 elements have a negative one charge.
Matches=from Chemical energy to light energy+heat energy
Explanation:
A matchstick has a lot of chemical energy stored in it. When the match is struck, it burns and the chemical energy in it produces heat energy and light energy.
brainliest and follow and thanks
What type of ions are commonly formed from halogens
Answer:
they all form diatomic molecules.
for example: H2, F2, Cl2, Br2, I2, and At2) and they all form negatively charged ions H-, F-, Cl-, Br-, I-, and At- .
Please help me with this chem question, I’ll mark you brainiest if it’s right. There’s multiple answers for this one.
Cant be B) or C)
Answer:
Option A. KCl (aq)
Option D. Mg(OH)₂(s
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
MgCl₂(aq) + KOH(aq) —>
In solution, MgCl₂(aq) and KOH(aq) will dissociate as follow:
MgCl₂(aq) —> Mg²⁺(aq) + 2Cl¯(aq)
KOH(aq) —> K⁺(aq) + OH¯(aq)
MgCl₂(aq) + KOH(aq) —>
Mg²⁺(aq) + 2Cl¯(aq) + 2K⁺(aq) + OH¯(aq) —> 2K⁺(aq) + 2Cl¯(aq) + Mg(OH)₂ (s)
MgCl₂(aq) + KOH(aq) —> 2KCl (aq) + Mg(OH)₂(s)
Thus, the products of the above reaction are: KCl(aq) and Mg(OH)₂(s)
Thus, option A and D gives the correct answer to the question.
Bases and acids are _
A. Mixtures
B. Gases
C. opposites
D. The same
Answer:
opposite
Explanation:
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what are 5 reason masks are important for the virus
Answer:
they reduce viral transmission
They prevent asymptomatic spread
You're protecting others from illness.
They're mandated by law in some states
They're good hygiene in general
answer truthfully:))
Answer:
b) velocity.
c) velocity, m/s²
d)change in velocity, change in direction, change in both velocity and direction.
e) increasing or decreasing
0.75 moles of an unknown acid are dissolved in water. If 0.42 moles of H3O+ form, what was the percent dissociation of the unknown acid?
Answer:
56 %
Explanation:
The percent dissociation of a weak acid can be defined as:
Moles of weak acid that produced H₃O⁺ species / Total number of weak acid moles * 100%
We are given all the required data to calculate the percent dissociation:
0.42 mol / 0.75 mol * 100 % = 56 %
The percent dissociation is 56%.
im struggling and dont want to fail
Answer: Hey I am sure you will do great just try your best
Explanation:
How is a less-intense wave different from a more-intense wave?
Answer:
A less-intense wave will have fewer decibels than a more-intense wave.
Explanation:
sound is measured in units called decibels (dB). The higher the decibel level, the louder the noise. On the decibel scale, the level increase of 10 means that a sound is actually 10 times more intense, or powerful.
How does catalysts make its way to common usage?
The theory of plate tectonics describes the movement of continental plates across the Earth's surface as if they were riding on a
conveyer belt of convection. Although the plate tectonic movement is extremely slow, there is evidence of this theory. Which
statements below support the theory of plate tectonics? Select ALL that apply.
A)Species became extinct more quickly at the end of the Cretaceous period.
B)99
Fossils of nearly identical species are found on both South America and
African continents.
C)Areas of subduction often have high seismic activity as one plate moves
under another plate.
D)Species become adapted to particular environments as random mutations
generate new phenotypes.
E)Marsupials existed on both North American and Australian continents
when these land masses were connected.
Answer:
The Answers are B, C, and E.
Explanation:
Fossils of nearly identical species are found on both South America and African continents. Marsupials existed on both North American and Australian continents when these land masses were connected. Areas of subduction often have high seismic activity as one plate moves under another plate. Since the continents were once joined, there is the likelihood that species originated in one location and then spread to other areas as the continents moved is likely. This explains the similarity of fossils or species in very geographically remote areas. The high activity of seismic movement also is best explained by plate movement.
The statements that supports the theory of plate tectonics are:
B) Fossils of nearly identical species are found on both South America and African continents. C) Areas of subduction often have high seismic activity as one plate moves under another plate.E) Marsupials existed on both North American and Australian continents when these land masses were connected.According to the question, we are asked to prove the evidence of the plate tectonic theory based on the movement of continental plates across the Earth's surface.
Plate tectonic theory states that there is a detachment of the outer crust of the Earth and they join when the upper part meets the continental plates and diverges across the planet.
Therefore, the statements that support this theory are the facts that:
Fossils of similar species are found in different continentsThere are different areas of seismic activity as a result of plate movementMarsupiais both existed on different continents even as their land masses are connected.Therefore, the correct answers are options B, C and E
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The first asteroid to be discovered is Ceres. It is the largest and most massive asteroid is
our solar system’s asteroid belt, having an estimated mass of 3.0 x 1021 kg and an orbital
speed of 17900 m/s. Determine the amount of kinetic energy possessed by Ceres.
Answer:
kinetic energy possessed by Ceres = 4.806 × 10^(29) J
Explanation:
We are given;
Estimated mass; m = 3 × 10^(21) kg
Orbital speed; v = 17900 m/s
Formula for kinetic energy is;
K.E = ½mv²
K.E = ½ × 3 × 10^(21) × 17900²
K.E = 4.806 × 10^(29) J
Thus;
kinetic energy possessed by Ceres = 4.806 × 10^(29) J
Which of the isotopes are radioactive? Check all that apply.
hydrogen-1
hydrogen-3
helium-4
carbon-14
uranium-235
copernicium-277
fermium-252
carbon-12
Answer:
here you go
Explanation:
hydrogen-3
carbon-14
uranium-235
copernicium-277
fermium-252
Answer:
hydrogen-3
carbon-14
uranium-235
copernicium-277
fermium-252
:)
Explanation:
what do you get if oceanic plates are moving away from one another
Answer:
Explanation:
When two plates are moving away from each other, they are called a divergent plate boundary.Along these boundaries, magma rises from deep within the Earth and erupts to form new crust on the lithosphere.
Helped by none other than the #Queen herself!
Please help me on this!!
Answer:
OK
Explanation:
OK
What would happen to an impulse if a neuron cannot produce chemicals at a synapse?
Answer:
Explanation: he axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron. ... The binding allows the nerve impulse to travel through the receiving neuron
The heat absorbed or released of a reaction at a constant presser is the same as the change in enthalpy
Answer:
HAT IS THE QUESTIN? hehehe
Explanation:
lol
What are the protons neutrons and electrons of Vanadium-52 +3 charge
HELP
Answer:
Protons: 23
Neutrons: 28
Electrons: 23
I THINK
Explanation:
Which of the following actions decreases the entropy of a system?
A-mixing baking soda and salt
b- freezing water
c- dissolving salt in water
d-boiling water
Answer:
b- freezing water
Explanation:
Solid<liquid<gas is the general rule for entropy increase
Freezing water would change the phase from liquid to solid which would lead to less entropy
Which abbreviation is
a unit of energy?
°C
cal
K
W
Answer:
cal is an abb
Explanation:
meaning calories