Answer:
The answer is option D.
Explanation:
Hope it helps!
Answer:
8000g
Explanation:
option D is the correct answer.
Don’t delete comment or I’ll report
Answer:
The molar mass of O is 16 g/mol and since we have 2 oxygen molecules we multiply 16 g/mol to get 32 g/mol. Therefore our best option would be option C, 32 g/mol.
Describe the problem you have chosen to investigate. Plan your investigation and write out the steps in your procedure. Include a sketch of your set up. Explain how this procedure and set-up will help you investigate the problem.
Answer:
Answer both asap for brainliest
Carry out your experiment. Present evidence that you have carried out the experiment below. You may upload photos as evidence. Record your data in a chart. Be sure you have starting data and several data points. Analyze your results. You may want to present your data as a graph. Did the investigation you planned determine the relationships among temperature, the energy transferred, the type of matter, the mass, and the change in the average kinetic energy of the particles as measured by the temperature of the sample? How do you know? Use complete sentences and paragraph form for your analysis.
Answer:
Six step guide to help you solve problems
Step 1: Identify and define the problem. State the problem as clearly as possible. ...
Step 2: Generate possible solutions. ...
Step 3: Evaluate alternatives. ...
Step 4: Decide on a solution. ...
Step 5: Implement the solution. ...
Step 6: Evaluate the outcome
what is the law of Conservation of mass ?
WILL GIVE BRAINLIEST! Please help me because I am unable to find help and I have to turn in this assignment or else I will fail this class for the year. I AM NOT ACCEPTING FILES!!
The statement about the number of moles of acid and base being the same is true in the neutralisation reaction between the acid HCl and base NaOH.
What is neutralisation reaction?A neutralisation reaction is the type of chemical reaction whereby an acid reacts with a base to form salt and water.
HCl + NaOH --------> NaCl + H2O
In the neutralisation reaction, between the acid HCl and base NaOH above, the balanced chemical equation showed that the initial number of moles of acid is equal to the final amount of the number of moles of known base which is NaOH.
Therefore, the statement about the number of moles of acid and base being the same is possible in the neutralisation reaction between the acid HCl and base NaOH.
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Body systems often interact with each other. The image below shows parts of body systems that interact to fulfill a function for the body.
Which statement describes how the body systems in the image work together to perform a common function
According to the research, the body systems work together to perform a common function through the coordination of endocrine substances and nerve impulses.
What are the body systems?They are the different sets of organs that make up the body, collaborating in each case with the fulfillment of some specific type of functions.
This simultaneous and juxtaposed set of systems involves various organs, ducts, tissues and various glands, all coordinated by endocrine substances and nerve impulses, so as to operate more or less autonomously as the case may be.
Therefore, we can conclude that according to the research, the body systems work together to perform a common function through the coordination of endocrine substances and nerve impulses.
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Why are fat layers and thick white fur advantageous for polar bears?
Group of answer choices
A. They insulate the bears and allow them to blend in with their environment.
B. They help the bears get rid of excess body heat more readily.
C. They help bears hibernate longer.
D. They allow the bears to run and swim faster to escape predators.
Answer:
A. They insulate the bears and allow them to blend in with their environment
Why do some cells make food molecules?
Answer:
All living cells release energy from food molecules through cellular breathing and/or fermentation. Some cells make food molecules using light energy through the process of (making food from light).
Making food from light- Photosynthesis
Breathing- Respiration
All living units give out power for a given time from food small complex units through formed of small units breathing and or fermentation. Some units make food small complex units using light power for a given time through the process of (making food from light).
I NEED HELP ASAP!!!!!!!!!!!!
WITHIN THE HOUR
Thanks
Answer:
A. O, S, Se
Explanation:
They are all considered "other nonmetals," found in row 16 of the periodic table, and are chalcogens. The other options don't have as much in common.
which device requires electrical energy to produce a chemical change
Electrolytic cell is the device which requires electrical energy to produce a chemical change.
What is an Electrolytic cell?This is referred to as electrochemical cell that requires an external source of electricity to effect a chemical change.
Without the source of the electricity, the chemical change won't have been produced at all.
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PLEASE HELP!!! HOW DO I DO THIS??
What is the Ka of a weak acid with a molarity of 0.333 and a pH of 4.6?
Atoms of arsenic (As) are often added to silicon (Si) in a process called doping to change the conductivity of the silicon. How does the addition of arsenic change the conductivity of silicon?
An atom of arsenic has one fewer valence electron and more electron shells than an atom of silicon, so the conductivity decreases because the arsenic atom gains an electron.
An atom of arsenic has one more valence electron and more electron shells than an atom of silicon, so the conductivity decreases because the arsenic atom loses the electron.
An atom of arsenic has one fewer valence electron and fewer electron shells than an atom of silicon, so the conductivity increases because the arsenic atom gains an electron.
An atom of arsenic has one more valence electron and more electron shells than an atom of silicon, so the conductivity increases because the arsenic atom loses the electron.
Answer:
B.) An atom of arsenic has one more valence electron and more electron shells than an atom of silicon, so the conductivity decreases because the arsenic atom loses the electron.
Explanation:
Silicon is located in the 3rd row and 14th column in the periodic table. Arsenic is located in the 4th row and 15th column in the periodic table. This means that arsenic has one more valence electron than silicon. Since arsenic is located one row down from silicon, its valence electrons occupy higher energy orbitals.
Silicon maintains a crystal-like lattice structure. Each silicon atom is covalently connected to assume this shape. When silicon gains one extra electron from arsenic, it experiences n-type doping. This new electron is not tightly bound in the lattice structure. This allows it to move more freely and conduct more electricity. This can also be explained using band gaps. Silicon, which previously had an empty conduction band, now has one electron in this band. This lowers the band gap between the conduction and valence bands and increases conductivity.
Answer:
its d
Explanation:
Please help I do not understand
A model of materials will show dense materials having tightly packed particles while less dense materials will have greater spaces between their particles.
What is density?Density is a measure of the compactness of a material.
Density is defined as the ratio of mass to the volume of a substance.
Density = mass/volumeDense materials have tightly packed particles while less dense materials have greater spaces between their particles.
Avogadro's hypothesis applies to substances in gaseous form since they do not have a constant volume.
Therefore, a model of materials will show dense materials having tightly packed particles while less dense materials will have greater spaces between their particles.
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ii. If the pressure after landing was 1.0 atm, what was the volume of the passenger's collapsed water bottle? (Assume the bottle collapsed easily and temperature didn't change.) (6 points)
Using the ideal gas equation and Gay Lussac's law, the volume of the passenger's collapsed bottle after landing is 0.0075 L.
What is ideal gas equation?The ideal gas equation shows the relationship between temperature, pressure, volume and number of moles.
The volume of the passenger's collapsed bottle after landing is 0.0075 L.
Given that;
PV = nRT
P = gas pressureV = volume of gasn = number of moles of gasR = molar gas constantT = temperaturen = PV/RT
Hence:
P = 0.75 atm;
V = 0.5 L;
T = 295 K;
R = 0.082 atmL/K.mol
n = 0.75 * 0.5 / 0.082 * 295
n = 0.015 moles
If the pressure after landing was 1.0 atm;
V1n1 = V2n2
V2= V1n1/n2
V2 = 0.5 L * 0.015 moles/ 1 mole
V2 = 0.0075 L
The volume of the passenger's collapsed bottle after landing is 0.0075 L.
Missing parts;
A passenger on an airplane finished a 0.5 L bottle of water during the flight
and replaced the lid. The cabin pressure and temperature were maintained at
0.75 atm and 295 K during the flight. After landing, he noticed his empty water
bottle had collapsed. (12 points)
i. How many moles of gas were in the water bottle?
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Weather is influenced by global patterns of atmospheric movement. Winds and
ocean currents are evidence for the process of
Winds and ocean currents are evidence for the process of regulating and stabilizing the climate patterns.
What are winds and ocean currents?Ocean current is the flow or movement of water in a direction by gravity, wind, and difference in density of the water.
Wind currents pull water and create ocean currents. The current flow to westwards, which is called Coriolis effect.
Thus, Winds and ocean currents are evidence for the process of regulating and stabilizing the climate patterns.
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What do makeup experts use in order to create different skin effects?
Answer:
on-skin silicone, liquid latex, and gelatine
Explanation:
hope this helps:)
What is the phase of water at 0.25 atm and 0°C?
find the molarity of 4.9 g of h2so4 in 400 ml solution
The molarity of a solution that contains 4.9 g of [tex]H_2SO_4[/tex] in 400 ml of solution would be 0.12465 M
Define molarity of a solution.
Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.
Mathematically,
[tex]Molality = \frac{Moles \;solute}{olume \;of \;solution \;in \;litre}[/tex]
Mole of 4.9 g [tex]H_2SO_4[/tex]
= [tex]\frac{mass}{molar \;mass}[/tex]
= [tex]\frac{4.9 g}{98.08}[/tex]
= 0.0499
[tex]Molality = \frac{Moles \;solute}{ olume \;of \;solution \;in \;litre}[/tex]
[tex]Molality = \frac{ 0.0499}{0.4}[/tex]
= 0.12465 M
Hence, the molarity of a solution that contains 4.9 g of [tex]H_2SO_4[/tex] in 400 ml of solution would be 0.12465 M.
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A sample of gas starts at 1.00 atm, 0.00 degrees Celsius, and 30.0 mL. What is the
volume if the temperature increases to 27.0 degrees Celsius and the pressure increases to
2 atm?
Answer:
pV= nRT
Explanation:
(p1 × V1)/ T1/ (p2 × V2)/ T2
Soil is conserved from erosion to
Answer:
keep it from being washed away by water
What’s the question??
Answer:
the phenotype of TT is the right answer
Why is the earth so round
Answer:
Cause why not?
Explanation:
Balance the following chemical equations:
what is your question in climate change?
Answer:
Why has my town experienced record-breaking cold and snowfall if the climate is warming? Is there scientific consensus that people are causing today's climate change? Do natural variations in climate contribute to today's climate change?
Explanation:
Yan po ang answer tama po yan
What is the entropy of a solid based on?
A. The conductivity of the atoms
B. The arrangement of the atoms
O C. The atomic radii of the atoms
O D. The electronegativity of the atoms
ANSWER FAST PLS
On Eagle Mountain (the highest point in Minnesota), you weigh ____ when you travel the 15 miles to get to Lake Superior's shore.
Question 2 options:
less than
the same as
more than
all of the above
If you are up on Eagle Mountain you weigh more than when you travel the 15 miles to get to Lake Superior's shore.
What is weight?The weight of an object is the product of the mass and the acceleration due to gravity. The acceleration due to gravity of an object is the impact owing to the fact that the object lies within the earth's gravitational field.
If you are up on Eagle Mountain you weigh more than when you travel the 15 miles to get to Lake Superior's shore.
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How is knowing conduction of heat useful to us? Explain in your own words please xx
There are a lot you want to know about heat transfer.
If u understand the mode of heat transfer well, then heat transfer is easy to continue.
Answer:
1: They give to the body Vitamin D 2: they give solar energy and that is what gives us revaluation around the sun (Drag) 3: it gives plants energy for photosynthesis (or dont know)
4:solar panels gives energy by the sun radio controlled area that gives us the battery's, lights etc...
Explanation:
EXPLAIN IT
A 500.0 ml. Glass filled with air is placed into water up-side-down while at 7.0°C. The water is heated to 77°C. How much air bubbles out from under the glass?
The answer is 125 ml air bubbles come out from under the glass
What is Charle's Law ?Charles's Law describes the directly proportional relationship between the volume and temperature (in Kelvin) of a fixed amount of gas, when the pressure is held constant.
V∝T
or express from two volume/temperature points:
[tex]\rm\dfrac{V_{1}}{T_{1}} =\dfrac{V_{2}}{T_{2}}[/tex]
This equation can be used to solve for initial or final value of volume or temperature
under the given condition that pressure and the number of mole of the gas stay the same.
It is given that
V₁ = 500 ml
T₁= 7 + 273 = 280 K
T₂ = 77+273 = 350 K
V₂= ?
Substituting the values in the above in the above equation
[tex]\rm\dfrac{500}{280}} =\dfrac{V_{2}}{350}[/tex]
V₂ = 625 ML
The volume of the glass is still 500 ml,
so, the volume of bubbles is 125 ml.
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The ph of a solution is 7. When acid is added to the solution, the hydronium ion concentration becomes 100 times greater. What is the ph of the new solution?.
After acid was added to the solution and the hydronium ion concentration becomes 100 times greater, the pH of the new solution is 5.
What is pH of solution?The pH of a solution is defined as the logarithm of the reciprocal of the hydrogen ion concentration [H+] of the given solution.
It is expressed as;
pH = -log[ H⁺]
Given that;
pH of the solution = 7Hydronium ion concentration H⁺ = ?pH = -log[ H⁺]
H⁺ = 10^( -pH )
H⁺ = 10^( -7 )
H⁺ = 10⁻⁷
When acid is added to the solution, the hydronium ion concentration becomes 100 times greater.
H⁺ = 10⁻⁷ × 100
H⁺ = 10⁻⁵
pH of the new solution will be;
pH = -log[ H⁺ ]
pH = -log[ 10⁻⁵ ]
pH = 5
Therefore, after acid was added to the solution and the hydronium ion concentration becomes 100 times greater, the pH of the new solution is 5.
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Which would most likely from a homogeneous mixture
Answer:
Sand would most likely be a homogeneous mixture
Which of the following is true of folded mountains, fault-block mountains, and volcanic mountains?
Form from the buildup of lava and ash
Form only at boundaries between two oceanic plates
Form only at boundaries between two continental plates
Form at both convergent and divergent plate boundaries
Answer:
Here are the following answers to the five questions:
(1) "Form only at boundaries between two continental plates."
(2) "A fault-block mountain"
(3) "Island arcs form when hot, fluid rock rises through thin spots in Earth's crust, whereas hotspot volcanoes form when two oceanic plate boundaries push against each other until subduction happens and the plates partially melt."
(4) "The fault plane runs from the top of the rock to the bottom of the rock at an angle greater than 45 degrees."
(5) "Segments of Earth's crust bent and doubled over, and moving wind and water gradually shaped the rock into gently sloping domes."
Explanation:
