Explanation:
Percent errors tells you how big your errors are when you measure something in an experiment. Smaller percent errors mean that you are close to the accepted or real value. For example, a 1% error means that you got very close to the accepted value, while 45% means that you were quite a long way off from the true value.
what are some of the activities performed during experiment
Which of the following is a physical change?
evaporation
explosion
rotting of food
corrosion
Answer:
i believe it is c
evaporation
Explanation:
Hope it's the correct one if not very sorry.
How would one convert 6 pounds to ounces (16 oz = 1b)?
Answer:
D.
Explanation:
I just got it right in the test :)
Can someone help me please I would really appreciated
Explanation:
whats the question. cause I didn't see it
HELP QUICKLY
What happens to food molecules during cellular respiration?
They undergo chemical reactions with carbon dioxide, releasing stored energy.
They undergo reactions in which the atoms are destroyed to produce energy.
They undergo chemical reactions to produce large, complex molecules.
They undergo chemical reactions with oxygen, releasing stored energy.
Answer: They undergo chemical reactions with oxygen, releasing stored energy.
Explanation:
I took my k12 7th grade science unit test and got this question correct.
Have a good day and drink some water plz
The food molecules during cellular respiration they undergo chemical reactions with oxygen, releasing stored energy.
What is chemical reaction?Chemical reaction is defined as a procedure in which one or more substances, known as reactants, are converted into one or more different substances, known as products.
It can also be defined as a method of chemically transforming one set of chemical substances into another.
There are basically six types of chemical reaction.
Combustion reactionDecomposition reactionNeutralization reactionRedox reactionPrecipitation reactionSynthesis reactionCellular respiration is defined as the process of oxidizing biological fuels in the presence of an inorganic electron acceptor such as oxygen to produce large amounts of energy, which drives the bulk production of ATP.
It can also be defined as the process by which sugar from food is converted into energy within cells.
Thus, the food molecules during cellular respiration they undergo chemical reactions with oxygen, releasing stored energy.
To learn more about chemical reactions, refer to the link below:
https://brainly.com/question/3461108
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If 5 J (joules) of electrical energy is used to power an iron, how many joules of heat and steam should it be transformed into?
Answer:
maybe 25 joules
Explanation:
please mark me as a brainlist
If 5 J (joules) of electrical energy is used to power an iron, 25 joules of heat and steam should it be transformed into.
What is energy?Energy is referred to by scientists as the capacity for work. People have figured out how to transform energy from one form to another and then use it to accomplish tasks, making modern civilization possible.
Walking and bicycling, driving cars on roads and boats through water, cooking meals on stoves, making ice in freezers, lighting our homes and workplaces, producing goods, and sending astronauts into space all require the usage of energy.
Energy is capable of changing its forms. For instance, a person's body stores chemical energy from the food they consume until they may use it as kinetic energy when working or playing.
Therefore, If 5 J (joules) of electrical energy is used to power an iron, 25 joules of heat and steam should it be transformed into.
To learn more about energy, refer to the link:
https://brainly.com/question/1932868
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the nucleus or center area of the atom contains two kinds of subatomic particles. which two?
An element is composed of one type of atom with its own unique properties. TRUE OR FALSE
Answer:
It's true
Hope it helps:-)
Answer:
true
Explanation:
item 3 steel is an alloy containing fe atoms and c atoms. which of the following diagrams best represents the particle-level structure of steel?
An alloy is obtained when an element is combined with another physically and not chemically. The image that accurately represents steel is the image in which carbon atoms are sandwiched between iron atoms.
Steel is an alloy of iron and carbon. In an alloy, the atoms one element is sandwiched in between atoms of another element in its crystal. Usually, allows are formed to improve certain desired properties of substances. The percentage of carbon included in steel depends on its intended use.
The image that can be used to represent the formation of steel is the image shown in B. In that image, small atoms of carbon are seen sandwiched between larger iron atoms. That is the accurate description of steel.
Learn more: https://brainly.com/question/857770
C) equally shared and form nondirectional bonds
Explanation:In metals, electrons are free to move as described by the electron sea model. Electrons are shared equally among atoms, and the structure is based on simple close-packed structures that contain no fixed directional bonds.
Oxygen can be produced in the laboratory by the reaction
2KClO3———-> 2KCl+3O2
How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37°C and 94.9 kPa? The vapor pressure of water at 37°C is 6.28 kPa.
Answer:
5.2g potassium chlorate is needed to do so
mass=35g, density=5g/cm3. what is the volume?
Answer:
7 cm^3
Explanation:
Density = Mass/Volume
5 = 35/x
multiply both sides by x to get
5x = 35
then divide by 5
so x = 7 cm^3
Predict what would happen if plants disappear?
Decomposers will die because they will lose their food source.
All secondary consumers will die because they will lose their food source.
Oxygen will only be available during the daytime.
There will be a limited amount of oxygen in the air.
Answer:
All secondary consumers will die because they will lose their food source
If 84.5 mol of an ideal gas occupies 21.5 L at 305 K, what is the pressure of the gas? pressure: atm
Answer:
98.367 atm
Explanation:
For this, you must use the equation PV=nRT. Since you are looking for P, rearrange the equation so that P= nRT/V.
Now collect the information you have:
n (mol) = 84.5
R (ideal gas constant to find atm not every case) = .08206
T (temperature) = 305 K (always convert to kelvin)
V (volume in liters) = 21.5
Now Use P= (85.5 mol)×(.08206)×(305 K)/(21.5) to get your answer in atm
a measure of the ability of an atom in a chemical compound to attract electrons is called
1. Cooking pots are provided with wooden or plastic handles .Why?
Answer:
So the heat doesn't transfer to the handle and heat it up causing you to burn yourself in cooking process
Explanation:
Hope this helps! Happy Halloween
Cooking pots are provided with wooden or plastic handles because wood or plastic handles are bad conductors of heat. Hence, the heat from the hot appliances does not flow to our hands with the result that we can handle them without any difficulty.
The "clusters" of Democritus are like what kind of material
that we know of today?
3. Write balanced ionic equations to show the dissolution of the following compounds in water: a) magnesium chloride
Answer:
MgCl2 + H2O
Explanation:
Coffee has a pH of about 5. Therefore, coffee is -
Question 6 options:
neutral
extremely acidic
somewhat acidic
basic
Answer:
The answer to your question is Basic
Explanation:
pH ranges from 0 to 14, with 7 being neutral. pHs less than 7 are acidic while pHs greater than 7 are alkaline (basic).
I hope this helps!
quotes for climate change
for example ‘’CLIMATE CHANGE IS REAL!’’
‘’SMALL CNAGES CAN MAKE A DIEFFENCE!’’
give me 3 and more
Answer:
Explanation:
WAKE FOR CLIMATE CHANGE IS NOT FAKE
SAVE THE GLACIERS
HELP THE ARCTIC ANIMALS
What are the three principles of Kinetic Molecular Theory
Answer:
The simplest kinetic model is based on the assumptions that: (1) the gas is composed of a large number of identical molecules moving in random directions, separated by distances that are large compared with their size; (2) the molecules undergo perfectly elastic collisions (no energy loss) with each other and with the
Explanation:
Disease caused by virus are more dangerous.Why?
Answer:
Explanation:
1. Virus's are hard to detect because of their simple construction.
2. Some mutate very easily.
3. It is hard to isolate the virus and kill it without doing damage to the host.
the part of an atom that has an overall positive charge is called
Write a 125 word summary of what you have learned in "Introducing the Microscope". Be sure to include steps on how to focus, how to solve for magnification, and what a field of view is and how to measure it.
Answer:
Introduction to Basic Microscopy. Microscopes are specialized optical instruments designed to produce magnified visual or photographic (including digital) images of objects or specimens that are too small to be seen with the naked eye.
Microscope are the important tools which are used by scientist. For example, in material science, medicine, mineralogy and microbiology.
Light microscope is able to send light. Light is being focused in a tight breath whereby that light passes through a sample which later it is able to create an image. This image passes to different lenses which magnifies it until it reaches the camera.
There are different types of microscope for example, Compound light microscope, Simple light microscope, and monocular microscope.
In simple light microscope only one lens which which is being used to magnify an object and it is not able to reach to a higher magnification.
In compound light microscope it uses two lenses to produce image. For example eyepiece lens and objective lens.
Explanation:
What did the periodic table help scientists discover?
Scientists can use the table to analyze reactivity among elements, predict chemical reactions, understand trends in periodic properties among different elements and speculate on the properties of those yet to be discovered.
6. Haydee prepared a solution with 3mL of potassium chloride (KCl) in 200 mL of water is prepared. Calculate the percent by volume concentration of the solution.
A. 1.46% B.1.48 %
C. 1.49 % D. 1.50%
Considering the definition of percent by volume concentration, the correct answer is option D: the percent by volume concentration of the solution is 1.50%
Percent by volume concentration is a measure of concentration that indicates the volume of solute per 100 volume units of the solution. This value is calculated by dividing the volume of the solute by the total volume of the solution, and multiplying by 100 to express it as a percentage:
[tex]percent by volume concentration=\frac{volume of solute}{total volume of the solution}x100[/tex]
In this case, you know:
volume of solute= 3 mLtotal volume of the solution= 200 mLReplacing in the definition of percent by volume concentration:
[tex]percent by volume concentration=\frac{3 mL}{200 mL}x100[/tex]
Solving:
percent by volume concentration=0.015×100
percent by volume concentration=1.50
Finally, the correct answer is option D: the percent by volume concentration of the solution is 1.50%
Learn more:
https://brainly.com/question/1713808Which process causes the greatest increase in the distance between particles?
Answer: The condensation is the process which causes distance.
Bases react with carbon dioxide and from............. and water
Answer:
I believe the answer is B. Carbonates
Explanation:
An atom will be neutral ONLY if
Answer:
They have the same number of charged protons and electrons, therefore balancing positive and negative charges. I hope this helps you.
Explanation:
Which option correctly describes the pattern of valence electrons on the periodic table? (1 point)
o The number of valence electrons increases from right to left.
O The number of valence electrons increases from left to right.
O The number of valence electrons increases from bottom to top.
O The number of valence electrons increases from top to bottom.
Answer:
The number of valence electrons increases from left to right.
Explanation: The number of valence electrons increases going across a period, or row in the periodic table, for example, group 1 elements have 1 valence electrons and group 2 elements have have 2.
Was arsenic able to replace Phosphorus in DNA?
Answer:
Arsenic-tolerant GFAJ-1 bacteria were reported to have replaced some of the phosphorus (P) in their DNA with arsenic. ... These bacterial cells were very efficient at using the small amount of available phosphate in preference over the easily available arsenic. so yes.
Explanation:
hope this helps
Answer:
Yes
Explanation:
Hope everything goes well with your work :D