Answer: All living things move in some way. This may be obvious, such as animals that are able to walk, or less obvious, such as plants that have parts that move to track the movement of the sun. All living things grow. Earthworms hatch from eggs and can grow up to a metre or more in length! Some earthworms are also able to regrow small parts of their body that have been lost or injured. Chromists are a diverse group of plant-like organisms and range from very small to very large. They are found in almost all environments.
Explanation: I hope that helped yall!
Based on the reactivities of the elements involved, which reaction will form products that are more stable than the reactants?
Answer:
Exothermic reaction
Explanation:
Since in an exothermic reaction heat is released, the products will be more stable than the reactants.
which of the following has the smallest radius? K+, K, Rb, Rb+
:
Option (c) is the correct answer.
Explanation:
It is known that when we move down a group then there is increase in size of atom. This is because there occurs increase in number of shells in the atom.
Also, when an atom loses electrons then it acquires a positive charge and size of the atom decreases. On the other hand, when an atom gain electrons then it acquires a negative charge and size of the atom increases.
Since, both Rb and K are same group elements and Rb has larger atomic size than K.
Hence, we can conclude that out of the given options K^{+}
+ has the smallest size.
Answer:
K+
Explanation:
Just took the quiz :)
What occurs as the atomic number of the elements in Period 2 increases?
1)The nuclear charge of each successive atom decreases, and the atomic radius decreases.
2)The nuclear charge of each successive atom decreases, and the atomic radius increases.
3)The nuclear charge of each successive atom increases, and the atomic radius decreases
4)The nuclear charge of each successive atom increases, and the atomic radius increases.
Answer:
3)The nuclear charge of each successive atom increases, and the atomic radius decreases
Explanation:
As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.
What happens when the number of electrons and protons inside of an atom are Not equel?
Hello, It's me Moriah Elizabeth!
Answer:
When the number of electrons does not equal the number of protons, the atom is ionized.
8.0 dm of NO is mixed with 6.0 dm3 of O, at room temperature and pressure (RTP).
The reaction below takes place until one of the reactants is used up.
2NO(g) + O2(g) + 2NO,(9)
What is the volume of the mixture at RTP after the reaction has taken place?
A)8.0 dm3
B)10.0 dm3
C)12.0 dm3
D)14.0 dm3
Answer:
B)10.0 dm3
Explanation:
Now we have to apply Gay-Lussac's law which states that gases combine in simple volumes provided the temperature and pressure remain constant.
2NO(g) + O2(g) ------>2NO
combining volumes 2 : 1 : 2
Volumes before reaction 8.0 6.0 0.0
Reacting volumes 8.0 4.0 8.0
Volumes after reaction - 2.0 8.0
Therefore;
Total volume after reaction = 2.0 + 8.0 = 10.0 dm^3
The volume of the mixture after the reaction is 10 dm³
The correct answer to the question is Option B. 10 dm³
The above is simply a demonstration of Gay-Lussac' law. The volume of the mixture after the reaction can be obtained as follow:
2NO(g) + O₂ —> 2NO(g)
Combining Vol: 2 dm³ : 1 dm³ : 2 dm³
Before reaction: 8 dm³ : 6 dm³ : 0
During reaction: 8 dm³ : 4 dm³ : 8 dm³
After reaction: 0 dm³ : 2 dm³ : 8 dm³
The Volume after the reaction = 2 + 8 = 10 dm³
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In the diagram of a transverse wave shown, what does M represent?
Transverse Wave
P=1cycle per second
A. Wavelength
B. Frequency
C. Amplitude
D. Rest positions
In the diagram of a transverse wave, P = 1 cycle per second, M represent wavelength. Therefore, option A is correct.
What is transverse wave ?A wave is considered to be transverse if its oscillations run counterclockwise to the wave's direction of advance. A longitudinal wave, on the other hand, moves in the direction of its oscillations. Transverse waves include water waves.
Due to the shear stress produced, transverse waves are frequently observed in elastic solids; in this situation, the oscillations are caused by the displacement of the solid particles from their relaxed state in directions perpendicular to the wave's propagation.
Trough: A transverse wave's lowest point. The distance separating one transverse wave's peak from the next is known as the wavelength. The distance from the wave's resting position to its crest is its amplitude.
Thus, option A is correct.
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which description shows copper at rtp?
a) stationary and closed together
b) stationary and randomly arranged
c)vibrating and in a regular arrangement
d) vibrating and in a random arrangement
Answer:
c)vibrating and in a regular arrangement
Explanation:
Copper is a chemical element represented by the symbol Cu and having atomic number 29. Copper is a transition metal which means its subshells are not completely filled and that is why they are vibrating in the room temperature. But copper is a solid at room temperature with regular arrangement of atoms.
Hence, the correct answer is "c)vibrating and in a regular arrangement".
PLEASE HELP ME ASAP IM DYING
Answer:
Empirical formula is NH₃
Explanation:
Given data:
Percentage of hydrogen = 82%
Percentage of nitrogen = 18%
Empirical formula = ?
Solution:
Number of gram atoms of H = 18 / 1.01 = 17.8
Number of gram atoms of N = 82 / 14 = 5 .9
Atomic ratio:
H : N
17.8/5.9 : 5.9/5.9
3 : 1
H : N = 3:1
Empirical formula is NH₃
What best explains why you should use transitions when writing an argument? Transitions help engage and interest the reader in the argument’s subject matter. Transitions help clarify the central argument for the reader. Transitions help the reader understand how the ideas in the argument are connected. Transitions make reading an argument smoother and more enjoyable.
Answer:
c
Explanation:
trust
Transitions help the reader understand how the ideas in the argument are connected best explains why you should use transitions when writing an argument. Therefore, option C is correct.
Why is it important to use transitions?They are cues that assist the reader in understanding your ideas. Transitional words or phrases help you move your thoughts from one sentence to the next and from one paragraph to the next.
Finally, transitional words smoothly connect sentences and paragraphs so that there are no abrupt jumps or breaks between ideas.
They make a direct link between ideas, sentences, and paragraphs. Specific words are used in effective transitions. Avoid using pronouns such as "this" to refer to an entire concept because it is not always clear who or what "this" refers to.
Transitions help the reader understand how the ideas in the argument are connected, which is why you should use them when writing an argument.
Thus, option C is correct.
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. The atoms are held together because they both pull on the ________________ electrons
Answer:
negative and positive i think
Explanation:
How many seconds are in 209.7 ms?
Answer:0.21 seconds
Explanation:
Just because it is and how science works
Answer:
0.21 seconds, please let me know if I am wrong
What is the general trend for electron affinity values going across a period?
Answer:
increase.
Explanation:
as you cross the period the atomic size decrease makes the atoms to have more affinity to the coming electrons.
If you put an egg on a plate will it melt ?? Im confused
4 Fe + 3 O2 --> 2 Fe2O3
How many grams of Fe will react with 40.0 grams of O2?
Answer:
93.33 g of Fe
Explanation:
The balanced equation for the reaction is given below:
4Fe + 3O₂ —> 2Fe₂O₃
Next, we shall determine the masses of Fe and O₂ that reacted from the balanced equation. This can be obtained as follow:
Molar mass of Fe = 56 g/mol
Mass of Fe from the balanced equation = 4 × 56 = 224 g
Molar mass of O₂ = 2 × 16 = 32 g/mol
Mass of O₂ from the balanced equation = 3 × 32 = 96 g
SUMMARY:
From the balanced equation above,
224 g of Fe reacted with 96 g of O₂.
Finally, we shall determine the mass of Fe required to react with 40 g of O₂. This can be obtained as follow:
From the balanced equation above,
224 g of Fe reacted with 96 g of O₂.
Therefore, Xg of Fe will react with 40 g of O₂ i.e
Xg of Fe = (224 × 40)/96
Xg of Fe = 93.33 g
Therefore, 93.33 g of Fe is required to react with 40 g of O₂.
Which of the following is NOT a sign of a chemical reaction?
A. Change in color
B. Change in size
C. Bubble formation
D. A temperature change
What type of glassware is useful for transferring liquids from the large stock container to a smaller container such as a graduated cylinder
Answer:
Beaker
Explanation:
In the laboratory, we often need to transfer liquids from a large stock container to a graduated cylinder in order to measure a specific volume of liquid.
This is done using a beaker. A beaker is a lipped cylindrical glass container for laboratory use (Oxford dictionary).
Hence, when transferring liquids from the large stock container to a smaller container such as a graduated cylinder, we use a beaker.
What is the noble gas electron configuration of bismuth (Bİ)?
OA [Kņ6s 6p
OB. e] 6s 6p
Oc. pke) 4l4 5d0 6s 6p
OD. [Kr] 5 5105p5 6s 6d10 6p?
OE. e) 6s5d0 6p
Answer: [Xe] 6s^2 6p^3
Explanation: The noble gases are on the last column of the periodic table and Xenon (Xe) is the noble gas before Bismuth (Bi). Then you go down to the next row which is 6s^2 and 6p^3.
Answer:
The correct answer is {Xe] 4f14 5d10 6s2 6p3
Explanation:
aspirin is a compound that contain carbon,hydrogen and oxygen. It is uesd as painkiller. An aspirin tablet contain 1.25×10³⁰ molecule. How many moles of this compound are present in the tablet
Answer:
Number of molecules = 1.25 x 10 30 molecules
Avogadro’s number = 6.022 x 10 23
Number of moles = ?
Formula
Number of moles = 1.25 x 10 30
6.022 x 10 23
= 2.07 x 106 moles
Explanation:
PLEASE HELP ASAP I NEED HELP I LOVE YOU THIS IS URGENT PLEASE MY CLASS ENDS IN LIKE A DAY AND A HAVE 3 UNITS LEFT
Answer:
B: Hemoglobin
Explanation:
that's the answer
Answer:
B.Hemoglobin
Explanation:
Hemoglobin is the red color pigment that gives the color to your blood. Its found in the RBC's [Red Blood Cells]. Its main function is to bind completely with oxygen, due to the presence of iron in it, that helps it to get transported to various parts of the body according to its necessity through blood.
What are the products of the combustion of a hydrocarbon?
O carbon and oxygen
O carbon dioxide and water
O carbon and hydrogen
O carbon dioxide and hydrogen
Answer:
carbon dioxide and water
The products of the combustion of a hydrocarbon is carbon dioxide and water. Hence option B is correct.
What is Hydrocarbon ?Hydrocarbon is a compound to which hydrogen atoms are attached to carbon atoms. Those are the chief components of petroleum and natural gas. Methane, Ethane, Butane and Pentane etc. are the examples of the hydrocarbon. liquid petroleum gas which we use to cook food in our home is a butane gas which is hydrocarbon.
when hydrocarbon react it releases heat, and carbon dioxide and water as by products.
lets see such a reaction for an example.
when methane react with a oxygen, it gives water and releases carbon dioxide.
CH₄ + 2O₂ ======= CO₂ + 2H₂O
Hence combustion of hydrocarbon gives water and carbon dioxide, option B is correct.
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OxYgen and hydrogen particles are kept in a container. Which of the following
accurately describes diffüsion of these gases?
OOxygen and hydrogen particles concentrate at the center of the container.
Oxygen particles move to one corner of the container and hydrogen particles go
to the opposite corner
DOxygen particles and hydrogen particles repel each other.
O Oxygen particles mix evenly with hydrogen particles.
Answer:
Option D
Oxygen particles mix evenly with hydrogen particles.
Explanation:
Diffusion refers to the movement of gasses from a region of higher concentration to a region of lower concentration.
Diffusion occurs in gases because their particles are in a state of constant random motion.
Due to this continuous random motion, once the oxygen and the hydrogen are added to the container, they will begin to mix freely with each other until they fill up the entire volume of the container.
What happens if you were to swallow a small amount if wet nail polish? Answer truthfully in your own words.
Answer:
I'm pretty sure you'll be fine
Explanation:
I've swallowed more than a small amount and I'm ok sort of
When hydrogen gas reacts with oxygen gas, the potential energy diagram for the reaction will appear more to which of the following?
Answer:
Maybe is D....
Explanation:
When the hydrogen peroxide decomposed,it graph such as A so maybe the formation of hydrogen peroxide is opposite direction as the A....Hope can help you.....
what do african snails eat
Answer:
hope it helps you a little
Is it physically possible to create a chemical serum that would give you any sort of superpower??
differentiate between stream load stream discharge and stream gradient
Answer:
Differentiated below
Explanation:
- Stream load is defined as the quantity of solid matter that's carried by the erosion of the stream.
- Stream discharge is defined as the quantity (which is volume) of water that passes a given point for a particular amount of time.
- Stream Gradient is defined as the slope of the stream. This is basically expressed as:
Stream gradient = Change in elevation between two points on a stream ÷ actual distance between the two points where water actually flows.
When enthalpy of reactants is higher than the product then the reaction will be.
Answer:
The reaction will be endothermic represented by a positive (+) sign
A serving of Frosted Flakes cereal contains 235,000 J of energy. Calculate the change in temperature (ΔT) that would occur if this food was used to heat 1,000 grams of water.
The change in temperature (ΔT) : 56.14 ° C
Further explanationGiven
Cereal energy = 235,000 J
mass of water = 1000 g
Required
the change in temperature (ΔT)
Solution
Heat can be formulated :
Q = m . c . ΔT
c = specific heat for water = 4.186 J / gram ° C
235000 = 1000 . 4.186 . ΔT
[tex]\tt \Delta T=\dfrac{235000}{1000\times 4.186}=56.14^oC[/tex]
Which of the following reactions would result in increased entropy?
Answer:
A option
Explanation:
Because recatants are in solid form having less enetropy and products are liquid form having more entropy
While other options reactants and products are in same phase gas phase having same entropy
The reaction that would result in increased entropy is the combustion reaction;
KNO3(s)--->K+(aq)+NO3-(aq). Option A
This is further explained below
What is a combustion reaction?Generally, a combustion reaction is simply a combustion process that occurs when a material combines with oxygen gas, producing energy as light and heat.
In conclusion, the chemical reaction KNO3(s)--->K+(aq)+NO3-(aq) is has all properties of a combustion reaction as the solid reactants gives an aq solution.
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why is carbon dioxide a green house gas
Answer:
That's because the glass walls of the greenhouse trap the Sun's heat. The greenhouse effect works much the same way on Earth.
Explanation:
Gases in the atmosphere, such as carbon dioxide, trap heat just like the glass roof of a greenhouse. These heat-trapping gases are called greenhouse gases.