Answer: a
Explanation:
In a couplet one statement is agreeing and one is rejecting. Therefore, option A is correct.
What do you mean by couplet ?A couplet is two lines of poetry that follow each other, particularly two lines that rhyme and are the same length.
Heroic couplets are similar to elegiac couplets. Heroic couplets are also usually closed and have their own meaning. They are frequently used in English epics and narrative poems.
A couplet is a unit of two lines of poetry that use the same or similar meter, rhyme, or are separated from other lines by a double line break. Here are some more important facts about Couplets are not required to be separate stanzas.
Thus, option A is correct.
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The percent composition of carbon in acrylonitrile is
a 5.690%
b 67.89%
С
47.90%
d 22.646%
Answer:
67.89
Explanation:it’s right
The percent composition of carbon in compound of acrylonitrile is 22.646%.
What is percent composition?Percent composition is defined as a convenient way to record concentration of solution.It is a expression which relates mass of element to mass of compound as,mass of element/mass of compound×100.
Percent composition helps in elemental analysis of compound which is useful in analysis of ores also. It helps in making solutions while performing the titrations. It helps in prediction of chemical formula which can be predicted by mass and molar mass of an element.
The compound acrylonitrile has a molar mass 53.06 g/mole and that of carbon is 12 g/mole thus, percent composition of carbon in compound of acrylonitrile is 12/53.06×100=22.646%.
Thus, the percent composition of carbon in compound of acrylonitrile is 22.646%.
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can someone please help me, i'll give you a 5 star rating and brainliest answer
Which of the following is an example of a chemical change?
A. Boiling water
B. Burning paper
C. Dissolving sugar in water
D. Melting gold
Answer:
b.) burning paper
Explanation:
Making Sense
1. School bus drivers are extra careful when they cross railroad tracks. They stop before they cross railroad tracks to be sure that there is no
train coming. Yet, trains typically move more slowly through towns than cars do. If trains usually move more slowly than cars, why can
they do more damage if they hit something in their path?
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Saved January 15, 2021 07:35:00 PM
Answer: I think that trains move faster then cars! Buttt, The trains are much stronger and bigger, then cars or trucks. Even if they move slowly they can still crush something smaller then them.
Explanation: ( didnt really understand the question, but i tried)
In general, what happens to atoms when they are exposed to extreme temperatures?
Answer:
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... Solids, liquids and gases all expand when heat is added.\
so hope that helps and sooooo
Answer:
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... Solids, liquids and gases all expand when heat is added.
Give the name of one of the 3 common acids used in chemistry
Answer:
Common strong acids include hydrochloric acid, sulfuric acid, phosphoric acid, and nitric acid. Common weak acids include acetic acid, boric acid, hydrofluoric acid, oxalic acid, citric acid, and carbonic acid.
pls help!!!
The temperature of a gas rose from 27°C to 77°C. At 77°C, the volume of the gas was 7.5 L. If the pressure did not change, what
was the initial volume of the gas
The initial volume of the gas : 6.43 L
Further explanationGiven
Temperature :
T₁=27+273 = 300 K
T₂=77+273 = 350 K
Volume : V₂=7.5 L
Required
The initial volume=V₁
Solution
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Input the value :
V₁=(V₂ x T₁)/T₂
V₁=(7.5 L x 300 K)/350 K
V₁ = 6.43 L
The substance that cannot be broken down into a simpler form by ordinary chemical means is called a __ ?
Answer:
Elements
Explanation:
An element is any substance that cannot be broken down into simpler form by ordinary chemical means.
Elements are distinct substances that cannot be split up into simpler substances. .
Such substances consist of only one kind of atom. There are over hundred elements known till date. Elements are made up of unique atoms. In a chemical reaction, elements combines and rearranges.
Cu(NO3)2 is what compound?
Answer:
the compound's name is copper nitrate
If a sample of gas of valume 605 mL and temperature of 39 OC, has 0,00803 moles. What is it’s pressure?
Answer: The pressure of the gas is 0.34 atm
Explanation:
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = ?
V = Volume of gas = 605 ml = 0.605 L (1L=1000ml)
n = number of moles = 0.00803
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]39^0C=(39+273)K=312K[/tex]
[tex]P=\frac{nRT}{V}[/tex]
[tex]P=\frac{0.00803\times 0.0821 L atm/K mol\times 312K}{0.605L}=0.34atm[/tex]
The pressure of the gas is 0.34 atm
PLZ HELP!!!!!asapnow
Answer:
Friction of wind against the ocean surface
Which reaction will proceed most quickly or be the easiest?
A. Li and F
B. Li and CI
C. Nah and F
D. Na and CI
Answer:
C. Na and F
Explanation:
The reaction between Sodium and fluorine will proceed more quickly and easily of all the given reaction choices.
This is because fluorine is the most electronegative element and sodium is more electropositive when compared to Lithium.
This significantly large electronegativity difference between the atoms confers a high reactivity on both of them. In this reaction, an ionic bond forms by the virtue of sodium losing one electron to be gained by fluorine. This way both atoms becomes isoelectronic with Neon.what would you observe if sodium and potassium are placed in hot water.
Answer:
Sodium reacts more quickly, generating enough heat to melt itself and to occasionally ignite the hydrogen gas, producing a yellow-orange flame characteristic of sodium. The potassium reacts violently, immediately bursting into a flame which has the characteristic violet color of potassium.
Explanation:
How can calcium oxide change directly to limewater?
Wants equation and observation
Answer:
Lime(Calcium Oxide) is a white solid with strongly basic properties.Lime reacts readily with water to produce slaked lime,which is the chemical compound calcium hydroxide.....
When carbon dioxide gas is passed through or over limewater,it turns milky due to the formation of calcium carbonate.
what is the molar mass of just the O in CO2?
Answer:
16 g/mol
Explanation:
In CO2, it means we have 1 mole of carbon and 2 moles of oxygen.
However, we want to find the molar mass of just a single mole of oxygen.
Now, from tables of values of elements in electronic configuration, the molar mass of oxygen is usually approximately 16 g/mol.
In essence the molar mass is simply the atomic mass in g/mol
Can you help plzzz thank you
Answer:
It would be Container 3
Explanation:
Each of the containers has the same amount of salt. Salinity refers to salt level. Since the question is asking for the container with the greatest salinity, you are looking for the container with the least water (because it will be the saltiest out of all of them). Container 3 has the least water.
Hope this helps :)
3 has less water so its saltier
A student claims that a large percentage of water on Earth is immediately available to drink. Is he correct? Why or why not?
Answer:
No, the student is not correct. The earth may have a lot of water... but not every part of water is drinkable. Most water is filled with bacteria and or viruses making it not suitable to drink! :)
Explanation:
HOPE THIS HELPS! BRAINLIEST? :)
how is a waves amplitude related to the amount of energy the wave carries?
Answer:
The energy transported by a wave is directly proportional to the square of the amplitude. So whatever change occurs in the amplitude, the square of that effect impacts the energy. This means that a doubling of the amplitude results in a quadrupling of the energy.
Lucy volunteers at an animal shelter, and she takes care of an orange tabby 1 point
cat and her kittens. Some of the kittens have orange markings, but some
have gray markings. What units of genetic material determine how living
things look?
Answer; the answer is variations
The unit of genetic material that determines how living things look is called variations, look below for more description.
What are genetic variations?Hereditary variety alludes to contrasts among the genomes of individuals from similar species. A genome is all the innate data — every one of the qualities — of a creature. Hereditary variety is the distinction in DNA successions between people inside a populace.
For example, the human genome contains somewhere close to twenty and 25 thousand qualities.
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How much energy is required to melt 2 kg of copper? Use the table below and
this equation: Q = mLfusion
A. 125.6 kJ
B. 9460 kJ
C. 414 kJ
D. 4730 kJ
Answer:
C. 414 kJ
Explanation:
Given parameters:
Mass of copper = 2kg
Unknown:
Amount of energy required to melt the copper = ?
Solution:
To solve this problem, we use:
Q = m L
m is the mass
L is the latent heat of fusion of copper = 207kJ/kg
So;
Q = 2 x 207 = 414kJ
How many atoms are in 162.0 g of magnesium?
Answer:
3,938.22
Explanation:
(correct me if I'm wrong)
This is the question!!!
Answer:
I think it's G
Explanation:
Answer:
eieaowjhfpowwohfawohfawhfae
Explanation:
Please help due soon fill in the blanks will give brainliest
Answer:
Proton has positive charge (+) and located in nucleus
Electron has negative charge (-) and located in electron cloud
Neutron has neutral charge (0) and located in nucleus
Now you will focus on a second hypothesis. This hypothesis can be very similar to the first, but this time you want to focus only on the second variable in question, speed. What could be a hypothesis that would illustrate the relationship between speed and kinetic energy? Use the format of "if…then…because…” when writing your hypothesis.
Answer:
If the mass of an object increases, then its kinetic energy will increase proportionally because mass and kinetic energy have a linear relationship when graphed.
Explanation:
is correct answer
Answer:
Sample Response: If the speed of an object increases, then its kinetic energy will increase proportionally because speed and kinetic energy have a linear relationship when graphed.
Explanation:
What is the atomic number of silicon
Answer:
The atomic number of silicon 14
According to periodic table
The atomic number of silicon is 14
Hope it helps:)
Why do scientist use the scientific method
Answer:
B
Explanation:
scientists always look for evidence
Answer:
Yea its B
Explanation: The person above me legit toke the answer out of my mouth
"During germination, the fertilized egg begins to sprout and grow. Each seed contains an embryo, or tiny plant, and it needs the right condition to grow. These conditions include the basic need of water, the correct temperature, and the right location, which is in the soil."
Answer:
See the answer below
Explanation:
Read the following passage and identify the error. During germination, the fertilized egg begins to sprout and grow. Each seed contains an embryo, or tiny plant, and it needs the right condition to grow. These conditions include the basic need of water, the correct temperature, and the right location, which is in the soil. Select the statement that corrects the error in the passage. Seeds are fertilized during germination, not before. Basic conditions include wind, not water. The fertilized egg begins to grow and mature, not an embryo. The fertilized seed begins to grow and sprout, not an egg.
A typical seed consists of a fertilized ovule which forms the embryo. Double fertlization ensures that a structure, the endosperm, surrounds and provide nutrition to the embryo while in a state of inactivity.
During germination, the embryo sprouts and grows given the right conditions of moisture, air, temperature, and other factors that may vary from seeds to seeds.
Can somebody Please Help
Answer:
5425440 μm
Explanation:
From the question given above,
Length (in ft) = 17.8 ft
Length (in μm) =?
Next, we shall convert 17.8 ft to in. This can be obtained as follow:
1 ft = 12 in
Therefore,
17.8 ft = 17.8 ft × 12 in / 1 ft
17.8 ft = 213.6 in
Next, we shall convert 213.6 in to cm. This can be obtained as follow:
1 in = 2.54 cm
Therefore,
213.6 in = 213.6 in × 2.54 / 1 in
213.6 in = 542.544 cm
Finally, we shall convert 542.544 cm to μm. This can be obtained as follow:
1 cm = 10⁴ μm
Therefore,
542.544 cm = 542.544 cm × 10⁴ μm / 1 cm
542.544 cm = 5425440 μm
Therefore, 17.8 ft is equivalent is equivalent to 5425440 μm
what is the chemical formula for Sulphate...
Answer:
SO4²
Explanation:
Formula and structure: The sulfate ion formula is SO42- and the molar mass is 96.06 g mol-1. This salt is formed by one sulfate center to which 4 atoms of oxygen are attached, 2 of these atoms are forming S=O.
Answer:
[tex]so _{4} ^{2 - } [/tex]
Explanation:
sulfate is consisting of sulfur element with 4 oxygen as the structure in the pic given and this group is 2- charged
6/14and3/7 answer 6/11and9/16answer 5:6=10:12answer
your question was incomplete.............. you haven't mentioned any required information
