Answers
Answer:
C and D
Explanation:
In the first table, both element particles have more electrons than protons which is unusual and indicates they have a negative charge. Furthermore both numbers add up to full electron shells (2,8 and 2,8,8) meaning they are ions (charged particles formed to gain full valence shells and become stable), so it is C for the first question, negative ions.
As for the second one, isotopes like versions of the same element except with different numbers of neutrons, so they are still the same element but have different mass. As shown here the numbers indicate the number of neutrons therefore it is D, 3 more neutrons and no more electrons.
Hope this helped!
Related Questions
Craik and Lockhart (1972) proposed the idea that deeper levels of ____ results in stronger retention of memories
A. Rehearsal
B. Multitasking
C. Memory
D. Processing
Answers
Answer: D. Processing
Explanation: 100% on topic test also its in my e notes.
Craik and Lockhart has proposed theory of memory processing. Thus, option D is correct.
Craik and Lockhart proposed the theory for the processing of the level of memory. The memory in humans can be sensory memory, working memory, and long-term memory.
The long term memories have been stored in the deeper cells and the increased or strong stimulation of the processing results in the stronger retention of the memories. Thus, option D is correct.
For more information about the memory processing, refer to the link:
https://brainly.com/question/6249980
Which phrase is the best definition of science?
Answers
Answer:
Science is the information gathered through study.
Explanation:
Answer:Observation of the physical world.
Explanation:
DNA is a double stranded molecule. If one strand is ATCGATCGATCG, what is the sequence of the other strand?
Answers
Does more data mean more reliable results or less
Answers
Answer:
more reliable. The more results the better results you get.
Explanation:
Answer:
more reliable results
Explanation:
hey there,
< More data is more reliable results as you can see even more about the experiment you are doing! If you only know one other scientist that had done the experiment and it worked for him, then that's not enough data, but if you have thousands of scientists that were able to do the experiment correctly, you will have a more reliable and correct result since now you have more data. >
Hope this helped! Feel free to ask anything else.
If the pressure, volume, and the number of moles of a gas are known, which is needed to calculate the universal gas
constant from the ideal gas laul?
O the temperature of the gas
the molar volume of the gas
the molar mass of the gas
the partial pressure of the gas
Answers
Explanation:
temperature of the gas
A class is 47 min how many seconds is this ?
Answers
Answer: 2820 seconds
1 minute = 60 seconds
Multiply the value times 60
47×60=2820
A gas has a volume of 150 cm3. Convert this volume into mL
Answers
Answer:
The answer is
150 mLExplanation:
To convert the volume from cm³ to mL we use the conversion
1 cm³ = 1 mL
So from the question
if 1 cm³ = 1 mL
Then 150 cm³ = 150 mL
Hope this helps you
Write a brief paragraph that shows that you understand the following terms and relationships between them: atom, well I kill compound, and element.
Answers
Answer:
Atom are smaller particles of an element
compounds are mixture of two element
Element are combination of compounds
Explanation:
When an element is breakdown into smaller particles it becomes an atom
A substance melting on the stove
is an example of a chemical
change
True
b. Flase
a.
Answers
Answer:
A. True hope this helped
Which chemistry is used to create energy? *
Nuclear Chemistry
Organic Chemistry
Analytical Chemistry
Biochemistry
Answers
Answer:
*biochemistry* is the answer
Answer:
No the real answer is nuclear chemistry
Explanation:
i'll GIVE BRAINLY
5. Label the following measurement by the quantity it represents: 37 s * A. Density B. Time C. Temperature D. Distance
Answers
Answer:
Hey there!
35 s represents time.
The s means "seconds."
Let me know if this helps :)
Which statement describes the general process of diffusion?
Molecules move from inside of the cell to outside of the cell.
Molecules start out unevenly distributed and end up evenly distributed.
Molecules start out evenly distributed and end up unevenly distributed.
Molecules move from outside of the cell to inside of the cell.
Answers
Answer:
Molecules start out unevenly distributed and end up evenly distributed.
Explanation:
Diffusion is the process by which molecules of a substance move from a region of higher concentration to a region of lower concentration until equilibrium is attained.
Molecules start out unevenly distributed and end up evenly distributed in a particular medium. Diffusion occurs due to the particulate nature of matter. When the particles that make up a substance are concentrated at a point, the collide more often with one another causing each molecule to spread out in order to occupy all the available space.
Diffusion occurs in gases, liquids and solids but occurs fastest in gases. Diffusion can be observed for example, in the spread of the smell of a dead rat from one point in a room to every part of the room.
Answer:
B
Explanation:
:D
A different student is given a 10.0g sample labeled CaBr2 that may contain an inert (non-reacting) impurity. Identify a quantity from the results of laboratory analysis that the student could use to determine whether the sample was pure.
Answers
Answer:
Melting Point.
Explanation:
In testing of a sample has impurities, we have to check the samples’s melting or boiling points or we a separation technique called chromatography.
Now, CaBr_2 which is calcium bromide is a White Hygroscopic Powder. Therefore it is a solid.
Now, a pure solid will always have a fixed melting point which means that it will melt completely at only one temperature.
However, if there are impurities, the melting point of a substance is affected in two ways:
-It's lower than than the fixed melting point
- It would melt at a range of different temperatures as opposed to a fixed temperature for the pure form.
Therefore, a quantity that can be used to determine whether the sample was pure will be melting point.
120mg=______g please help
Answers
Answer:
0.12
Explanation:
Cuz you divide the mass value by 1000.
Much Smort (I look up on internet)
You have a different rock with a volume of 30cm and a mass of 60g, What is its density?
Answers
Therefore,
Density = 60g/30cm
2. A golden-colored cube is handed to you. The person wants you to buy it for
$100, saying that it's a gold nugget. You pull out your old geology text and
look up gold in the mineral table, and read that its density is 19.3 g/cm3. You
measure the cube and find that it is 2 cm on each side, and has a mass of 40g.
What is its density? Is it gold? Should you buy it?
Answers
Answer:
Volume of the cube is 2*2*2 = 8cm^3.
Divide the weight (40g) over the volume (8cm^3).
Density is 5g/cm^3. Definitely not gold.
Explanation:
Yes, the given golden-colored cube is gold .The density of gold is 32 gm/cm³ and we must buy it.
What do you mean by density?Density is a mass of a unit volume of a material substance.
The formula for density is d = M/V, where d is density, M is mass, and V is volume.
Density is commonly expressed in units of grams per cubic centimetre.
To calculate density-
given
mass=40gm
side of cube =2cm
therefore, volume=(side)³
=8cm³
density=?
density=mass/volume
density=40/8
density=5 gm/cm³
The handed golden-colored cube is gold with its density 5gm/cm³ and hence we must buy it.
Learn more about density ,here:
https://brainly.com/question/15164682
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what is the most poisonous animal?
Answers
Answer:
That depends on what species it is
Explanation:
Like reptiles it is rattlesnakes
Spiders would be black widow
So it depends on the what species you what.
Which of the following is a property of a pure substance?
It consists of different types of compounds.
It may have substances in different states of matter.
The ratio of the particles that make it up is fixed.
Its components can be separated by employing physical methods.
Answers
Answer:
The ratio of the particles that make it up is fixed
Explanation:
What occurs when a solid substance dissolves into a liquid? 1 It stays solid and sinks to the bottom of the liquid substance. 2 It breaks down and becomes part of the liquid substance. 3 It stays solid and floats on the top of the liquid substance. 4 It changes the liquid substance into a solid substance.
Answers
Explanation:
When a solid substance is dissolved in a liquid such as water, the intermolecular forces of attraction between the molecules in the solid substance are overcome and they exist as ions in the solution. Hence the answer is 2.
The correct option is 2.
When a solid substance is dissolved in a liquid such as water, the intermolecular forces of attraction between the molecules in the solid substance are overcome and they exist as ions in the solution.
What is dissolution?Dissolution is the process in which a substance forms a solution. Dissolution testing measures the extent and rate of solution formation from a dosage form, such as a tablet, capsule, ointment, etc. The dissolution of a drug is important for its bioavailability and therapeutic effectiveness.
What is an example of a dissolution?Stirring sugar into water is an example of dissolving. The sugar is the solute, while the water is the solvent. Dissolving salt in water is an example of the dissolution of an ionic compound.
Learn more about dissolution here https://brainly.com/question/4529762
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When sugar is dissolved in water and mixed well the resulting solution is classified as a
Answers
Answer:
homogeneous mixture
Explanation:
is helium gas a mixture or pure substance
Answers
WILL GIVE BRAINLETS
What is the landform in the image? A.Dune B.Hill C.Plateau D.River
Answers
Answer:
the answer is c
Explanation: bc it can't be a hill or a river and a dune no way so it is c a PLATEAU
hope this helped have a great day
There is no water to be a river landform and no hills to be a hillbilly platform
Joshua uses his thermometer (experimental value) and finds the boiling point of ethyl alcohol to be 75°C 75 ° C . The accepted value of ethyl alcohol is 80°C 80 ° C . What is his percent error?
Answers
75-80 = 5 = .0625 X 100 = 6.25%
80 80
Describe how the proton, electron and neutron were experimentally discovered.
Answers
During respiration, energy is retrieved from the high-energy bonds found in certain organic molecules. Which of the following, in addition to energy, are the ultimate products of respiration?
(a) CO2, H2O
(b) CH3, H2O
(c) CH2OH, O2
(d) CO2, O2
Answers
Answer:
(A.) CO2, H2O
Explanation:
The chemical equation for respiration process is:
[tex]C_{6}H_{12} O_{6}[/tex] + [tex]6O_{2}[/tex] → [tex]6CO_{2}[/tex] + [tex]6H_{2} O[/tex] + ATP↑
Energy is released during the biochemical process in the organism's cells in form of ATP. Byproducts of the reaction are carbon dioxide and water molecules.
Let me know if you require any further assistance.
Variable definition
Answers
Answer: is factor that change in a controlled experiment
Explanation:
What is the speed of an object that moves 100 meters in 5 seconds?
Answers
Answer:
speed= distance/time
= 100/5=20mph
Which is the larger? 27 kilograms or 270 grams?
Answers
Answer: 27 killograms
Explanation: 1kg = 1000 grams
27 kilograms =27000 grams
How many grams of carbon (C) would be present in carbon monoxide (CO) that contains 2.666 grams of oxygen (O)?
Answers
Atomic mass of O=16
2,666x12/16=1,9995
Hope that is right
Answer:
Explanation:
Given :
Mass of oxygen containing carbon monoxide (CO) is 2.666 gram .
To Find :
How many grams of carbon (C) would be present in carbon monoxide (CO) that contains 2.666 grams of oxygen (O) .
Solution :
By law of constant composition , a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.
So , volume of solution does not matter .
Moles of oxygen ,
Now , molecule of CO contains 1 mole of C .
So , moles of C is also 0.167 mole .
Mass of carbon ,
Therefore , mass of carbon is 2 grams .
Hence , this is the required solution .
A researcher wants to refine an investigation to determine the effectiveness of an enzyme at various temperatures. Which of the following would best help the researcher determine how well the enzyme is working? Question 20 options: The researcher should measure the difference in temperature during the reaction. The researcher should measure the difference in the amount of product at the beginning of the reaction. The researcher should measure the difference in the amount of enzyme remaining after the reaction. The researcher should measure the difference in the amount of product at the end of the reaction.
Answers
Answer:
The researcher should measure the difference in the amount of product at the end of the reaction.
Explanation:
Enzymes are defined as the protiens that are responsible for increasing the rate of reaction.
With the increase in temperature, the enzyme activity increases and so the rate of reaction increases. It means at lower temperature the rate of reaction decreases and the amount of product also decreases.
So, to determine the effectiveness of an enzyme at various temperatures, the difference in the amount of the product at the end of reaction should be measured.
Hence, the correct answer is "D".