Answer:
Ionic bonds result from the transfer of electrons from one atom to another
Explanation:
In covalent bonds, atoms share electrons, whereas in ionic bonds atoms transfer electrons. The reaction components of covalent bonds are electrically neutral, whereas for ionic bonds they are both charged.Covalent bonds are formed between two non-metals, whereas ionic bonds are formed between a metal and non-metal.
Answer:
Covalent bonds are defined as sharing of electrons, ionic bonds are the result of transferred electrons;
Covalent bonds form between non-metals (elements) and ionic bonds form between metal and non-metals (ions)
when calculating specific heat what if the change in temperature is negative?
Answer:
If AT and q are negative, then heat flows from an object into its surroundings. If a substance gains thermal energy, its temperature increases, its final temperature is higher than its initial temperature, then AT>0 and q is positive.
explain why boiling is a reversible change
Answer:
This is a reversible change. Similarly, if you boil water, it evaporates and becomes water vapor. When you cool this vapor down, it turns back to water. A change which cannot happen backward, that is, it cannot be reversed is called an irreversible change.
Explanation:
When we boil water by heating, then it changes into steam. Now, if we cool the steam, then water is formed again. So, the changing of water into steam has been reversed by cooling. Thus, the boiling of water (or evaporation of water) is a reversible change.
PLS HELP! I’m marking brainliest as well
Why is the Milky Way considered a galaxy
Answer:
Explanation:
All the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it appears as a milky band of light in the sky when you see it in a really dark area.
Answer: it is
Explanation: A galaxy is a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction, plus there are 100 billion planet in it.
if your going down a hill what type of energy are you making?
Answer:
Gravitational potential energy - into Kinetic energy
Explanation:
How many mL of 0.100 M NaCl would be required to make a 0.0365 M solution of NaCl when diluted to 150.0 mL with water?
Answer:
54.75 mL
Explanation:
First calculate the number of moles of NaCl in the 150mL solution of NaCl
0.0365 moles should be present on 1000cm3 or 1dm3 of water.
1L = 1 dm3
1 mL = 1 / 1000 dm3
150 mL = 150/1000 dm3 = 0.15 dm3
If x moles are present in 0.15 dm3,
x/ 0.15 = 0.0365
We get x= 0.0365 × 0.15 mol
Now x amount of moles should be taken from the initial 0.100 M NaCl solution
So 0.1 moldm-3 = 0.0365× 0.15 mol / V
we get V = 0.05475 dm3
V= 0.05475 L
V= 54.75 mL
According to coulomb's law, in which ionic compound are the attractive forces the strongest?.
Answer:
A cation with a 2+ charge will make a stronger ionic bond than a cation with a 1+ charge. A larger ion makes a weaker ionic bond because of the greater distance between its electrons and the nucleus of the oppositely charged ion.
8. Why are we focusing on high levels of ozone in the troposphere in this lab while in Lab 2 (Stratospheric Ozone) we focused on low concentrations of ozone in the stratosphere?
Answer:
f4
Explanation:
your welcome.
Explain how the complexity and diversity of living things has changed over time
Answer:
Dylan invested $ 600 in a savings account at a 1.6 % annual interest rate . He made no deposits or withdrawals on the account for 2 years. The interest was compounded annually . Find, to the nearest cent, the balance in the account after 2 years. a₁ What information from the question is important ? b . How much does Dylan have in his bank account after 2 years ? Show work .
Q.2. Which of the following statements is true of second ionization energies?
a) That of Al is higher than that of Mg because Mg wants to lose the second electron, so it is easier to take the second electron away
b) That of Al is higher than that of Mg because the electrons are taken from the same energy level, but the Al atom has one more proton
c) That of Al is lower than that of Mg because Mg wants to lose the second electron, so the energy change is greater
d) That of Al is lower than that of Mg because the second electron taken from Al is in a p orbital, so it is easier to remove it.
Answer:
a) That of Al is higher than that of Mg because Mg wants to lose the second electron, so it is easier to take the second electron away
Statement which is true regarding second ionization energy is that ionization energy of of Al is higher than that of Mg because Mg wants to lose the second electron, so it is easier to take the second electron away.
What is ionization energy?Ionization energy is defined as the minimum amount of energy required to remove an electron which is loosely held in the outermost shell to form an isolated gaseous atom,ion or molecule.
It has a positive value for neutral atoms indicating that the ionization process is an endothermic process . The closer the outermost shell electrons are to the nucleus of an atom higher is it's ionization energy.It is expressed in electron volts or joules.
Ionization energy increases across period as more energy is required to remove electron from an atom as it is closely held along a period while it is decreasing down the group as on going the group the inter-nuclear distance increases and as a result less energy is required to remove an electron.
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Many plant cells have chloroplasts. Which process occurs in chloroplasts?
photosynthesis
respiration
food storage
reproduction
Answer:
photosynthesis
Explanation:
chloroplasts store sugar which is needed for photosynthesis
In which process do particles move closer together but remain in motion?
А condensation
B
diffusion
с
evaporation
D
freezing
Answer: c
Explanation: the particles stay together but has some gain more heat they break apart.
How many grams of acetic acid are present in 250g of vinegar that contains 5.00% acetic acid?
Which statement is always true when nuclear fusion occurs?.
Answer:
The combined number of protons and neutrons remains constant.
Explanation:
= )
I made a really helpful study set for this assignment on Quizlet. Feel free to visit the following if you need help with the rest of this assignment. Thanks and good luck!
Quizlet - "Physical Science - 5.4 Modeling Fusion and Fission Quick Check"
h t t p s : / / q u i z l e t . c o m / 7 3 7 5 5 3 6 8 0 / p h y s i c a l - s c i e n c e - 5 4 - m o d e l i n g - f u s i o n - a n d - f i s s i o n - q u i c k - c h e c k - f l a s h - c a r d s / ? n e w
Chemical properties of water for class 8
Answer:
pH value is 7neither acidic nor basecan be found in all 3 state (ie. liquid, solid and gas {vapour})it's excellent solventunder which conditions do you expect helium gas to deviate most from ideal behavior?
Answer:
Explanation:
[2-0] NC Special Operation
[2] Supervisor
[2-1] Emergency Response
[2-2] Juggernaut
[2-3] Commander
[2-4] Division Director
How many moles are in 9.12 x 1023 molecules of sugar?
Answer:
519
Explanation:
.......................
When unbalanced forces act on an object that is in motion, the object can:
A. change speed, direction, or both.
B. only change direction.
C. only slow down.
D. only speed up.
Answer:
A. change speed, direction, or both
Explanation:
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Nitrogen will ____ valence electrons when forming an ionic bond.
cobalt iii percarbonate as a formula
Answer:
Co2(CO3)3
Hope this helps!!
An atom of sodium has 11 electrons. Make a sketch of a sodium atom, showing how many electrons it has at each energy level. Infer how reactive sodium atoms are.
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which professional most likely uses x-ray technology a financial analyst or a dentist
Answer:
A dentist
Explanation:
Hope this helps
The body also loses heat by the evaporation of sweat. How is a tea kettle boiling similar to the evaporation of sweat from the body?
Well they both leat sweat out, so they steam.
The graph below shows the solute concentration inside a paramecium over time. What is happening at the time indicated by the pointer?
Water is moving rapidly into the paramecium by osmosis.
Water is moving rapidly out of the paramecium as the contractile vacuole contracts.
The paramecium is having a meal.
Solutes from the surrounding water are diffusing through the cell membrane, causing the solute concentration inside the paramecium to rise.
The pointer indicated the point at which water is moving rapidly out of the paramecium as the contractile vacuole contracts.
The pointer specifically indicates where the water solute concentration dropped. In order for the solute concentration of the water to drop, more water would have to be added.This means that water from the paramecium moves into the surrounding water as the contractile vacuole contracts. Consequently, the solute concentration of the surrounding solution decreases. When water moves from the solution into the paramecium, the solute concentration increases and this forms a continuous cycle in the graph.More on water movement by osmosis can be found here: https://brainly.com/question/21395644?referrer=searchResults
Will the things dissolve by themselves over time?
When a substance dissolves, it looks like it disappears. But in fact it has just mixed with the water to make a transparent (see-through) liquid called a solution. A solution has two parts. The solute is the solid that gets dissolved.
Answer:
it really depends what they are
Explanation:
Draw the alkyne formed when 1,1‑dichloro‑3‑methylbutane is treated with an excess of a strong base such as sodium amide. Omit byproducts. (give the neutralized alkyne product, not the acetylide salt. ).
This problem is asking for the major alkyne product that is formed when 1,1‑dichloro‑3‑methylbutane reacts with sodium amide (NaNH₂) ignoring any byproduct.
Thus, we can firstly say that such reaction of an alkyl halide with a strong base such as sodium amide is able to remove the halogen-based substituents and hence form insaturations in the form of double or triple bonds depending on the degree of substitution.
For instance, if one halogen substituent, then an alkene will be formed; but if two, then an alkyne (like this problem).
In such a way, as shown on the attached figure, the product will be 3-methylbutyne due to the loss of two chlorine substituents.
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https://brainly.com/question/9620187https://brainly.com/question/14282000what class of small objects have orbits completely between the gas giants, occasionally crossing their paths?
The class of small objects with orbits completely between the gas giants is centaurs.
Centaurs are a class of small tiny bodies that circles the Sun amid Jupiter as well as the Neptune, crossing the orbits of one or more of the giant planets. It has a semi-major axis, also known as perihelion, between that the outer planets.
Centaurs' orbits are often unstable since they have crossed the orbits of more than one of the gas giant planets. They are known to have the properties of asteroids and comets.
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What makes a hydrocarbon saturated?
Answer:
Explanation:
It's easier to answer what makes it unsaturated.
H - C ≡ C - H
This is Acetylene. It has three shared bonds between the two carbons. That many bonds makes it unsaturated.
H H
H - C - C - H
H H
Draw lines from 1 H on top to the Carbon underneath Do the same with the other hydrogen. Make the two Hydrogens on the bottom do the same thing.
The point is that Carbon has 4 bonds. 1 bond goes to the other Carbon. The other 3 take on Hydrogen. That molecule is saturated: nothing can be added in its natural state.
Electrical Bonding and Kinetic Energy Quick Check
2. Which statement describes the effect of adding more energy to a system, assuming a phase change does not occur?(1 point)
A. The particles within the system will have greater motion, and the temperature will decrease.
B. The particles within the system will have less motion, and the temperature will increase.
C. The particles within the system will have less motion, and the temperature will decrease.
D. The particles within the system will have greater motion, and the temperature will increase
3. Which statement correctly describes how attractions that hold particles break?(1 point)
A. Attractions occur due to gravitational forces. When particles have low enough energy, these forces can no longer keep particles together.
B. Attractions occur due to electrostatic forces. When particles have low enough energy, these forces can no longer keep particles together.
C. Attractions occur due to electrostatic forces. When particles move fast enough, these forces can no longer keep particles together.
D. Attractions occur due to gravitational forces. When particles move fast enough, these forces can no longer keep particles together.
4. Which statement explains why a rubber band analogy is not a perfect comparison for bonds in a substance when considering phase changes?(1 point)
A. For a phase change from solid to liquid, the bonds break completely and particles can move independently of each other.
B. For a phase change from solid to liquid, the bonds do not break completely and particles can still slide past each other.
C. For a phase change from liquid to gas, the bonds do not break completely and particles can still slide past each other.
D. For a phase change from liquid to gas, the bonds break completely and particles can move independently of each other.
5. The boiling point of benzene is 80ºC. Which pair of samples will have the same average kinetic energy as benzene molecules?(1 point)
A. a sample of liquid benzene at 70ºC and a sample of gaseous benzene at 90ºC
B. two samples of liquid benzene, one at 70ºC and the other at 80ºC
C. two samples of gaseous benzene, one at 80ºC and the other at 90ºC
D. a sample of liquid benzene at 80ºC and a sample of gaseous benzene at 80ºC
When particles move fast enough, these forces can no longer keep particles together.
Recall that the particles of a substance are in constant random motion. Hence, when more energy is added to the system, the particles within the system will have greater motion, and the temperature will increase.
The forces that keep molecules together in a particular state of matter are electrostatic forces. When particles move fast enough, these forces can no longer keep particles together.
It is common to use the analogy of an elastic material to represent the bonding between atoms in molecules. However, this analogy is not apt in a phase change because, for a phase change from liquid to gas, the bonds break completely and particles can move independently of each other.
We know that the average kinetic energy of the molecules of a substance depends on the temperature of the body. Therefore, a sample of liquid benzene at 80ºC and a sample of gaseous benzene at 80ºC will have the same average kinetic energy as benzene molecules.
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Which statement best describes the effect of radioactive decay on a nucleus?.
When radioactive decay occurs, the original nucleus splits into daughter nuclei and the resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.
Unstable nuclei often undergo radioactive decay. In a radioactive decay, the unstable nucleus is broken up into other nuclei. Usually, the nuclei formed during radioactive decay are smaller in mass compared to the original nucleus.
Also, the resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.
Answer:
radiation travels from its source in the form of energy waves or energized particles
Explanation:
radiation is energy