Answer:
Filtration
Explanation:
Pleaseeee help I’m desperate
If u can answer all three of them
I’ll give you brainliest
Answer:
5.80
Explanation:
Explain why is it a good idea for the eco-house to have both a wind turbine and solar panels?
Answer:
Explanation:
Wind is more of an efficient power source than solar. Compared to solar panels, wind turbines release less CO2 to the atmosphere, consume less energy, and produce more energy.
What design element of an astronaut's spacesuits protects him or her from micrometeoroids, which are tiny bits of space debris travelling at high speeds?
Answer:
Tough outer shell
Explanation:
Three types of space suits based on their purpose are IVA (Intravehicular activity), EVA (extravehicular activity), and IEVA (intra/extravehicular activity)
Space suits have an outer layer known as the Integrated Thermal Micrometeoroid Garment also known as the TMG or ITMG
The functions of the TMG includes the provision of an insulation medium to the wearer of the suit thereby preventing loss of heat and keeping the wearer warm, protect the wearer from solar radiation which are harmful as well as from Micrometeoroid and debris orbiting in space known as MMOD
The outermost layer of the EMU TMG suits is white Ortho-Fabric that consists of Nomex, Kevlar and Gore-Tex, making it fire resistant, very strong and very tough, and water proof as well as breathable.
Dissolved hydrofluoric acid reacts with dissolved sodium hydroxide to form water and aqueous sodium fluoride
Answer:
HF(aq)+NaOH(aq)→NaF(aq)+H2O(l)
Explanation:
Complete question
Dissolved hydrofluoric acid reacts with dissolved sodium hydroxide to form water and aqueous sodium fluoride. What is the net ionic equation
Equilibrium equation between the undissociated acid and the dissociated ions
HF(aq)⇌H+(aq)+F−(aq)
Sodium hydroxide will dissociate aqueous solution to produce sodium cations, Na+, and hydroxide anions, OH−
NaOH(aq)→Na+(aq)+OH−(aq)
Hydroxide anions and the hydrogen cations will neutralize each other to produce water.
H+(aq)+OH−(aq)→H2O(l)
On combining both the equation, we get –
HF(aq)+Na+(aq)+OH−(aq)→Na+(aq)+F−(aq)+H2O(l)
The Final equation is
HF(aq)+NaOH(aq)→NaF(aq)+H2O(l)
How are ionic bonds formed?
Multiple choice question.
A)
loss of electrons by atoms
B)
sharing of electrons between atoms
C)
electrostatic forces between ions
D)
gain of electrons by atoms
Answer:
c
Explanation:
Answer:
Same type of question from quizlet
But the answer is C
I hope you got it right :)
A volume of 3.0 L of air is warmed from 50 degrees celsius to 100 degrees celsius. What is the new volume if the pressure remains constant?
Answer:
3.45 L
Explanation:
Temperature and volume are linearly related (when one increases or decreases, so does the other).
Convert the temperature to Kelvin:
50 °C = 323 K
100 °C = 373 K
To find the rate of change, divide 373 by 323 to get roughly 1.15
Multiply the amount of liters by this factor to get your answer
Chemistry help!
Zoom in to see better!!
Answer:
2.5 moles of Al
Explanation:
We'll begin by calculating the number of mole in 127 g of Al₂O₃. This can be obtained as follow:
Mass of Al₂O₃ = 127 g
Molar mass of Al₂O₃ = 101.961 g/mol
Mole of Al₂O₃ =?
Mole = mass / molar mass
Mole of Al₂O₃ = 127 / 101.961
Mole of Al₂O₃ = 1.25 mole
Finally, we shall determine the number of mole of Al that reacted. This can be obtained as follow:
4Al + 3O₂ —> 2Al₂O₃
From the balanced equation above,
4 moles of Al reacted to produce 2 moles of Al₂O₃.
Therefore, Xmol of Al will react to produce 1.25 moles of Al₂O₃ i.e
Xmol of Al = (1.25 × 4)/2
Xmol of Al = 2.5 moles.
Thus, 2.5 moles of Al is needed for the reaction.
44.0L of O2 react with excess Sulfur dioxide gas. All gases are kept at the same temperature, pressure, and volume. What will be the theoretical yield of Sulfur trioxide gas in Liters?
Answer:
The theoretical yield of sulfur trioxide is 88.0 Litres
Explanation:
The chemical reaction occurring between oxygen and sulfur dioxide is given in the chemical equation below :
2SO₂ + O₂ ----> 2SO₃
From the equation of reaction, 2 moles of sulfur dioxide reacts with 1 mole of oxygen to produce 2 moles of sulfur trioxide.
Volume of 1 mole of a gas at STP is 22.4 L
Number of moles of gas in 44.0 L = 44.0/22.4 moles
1 mole of oxygen reacts with 2 moles sulfur dioxide to produce 2 moles of sulfur trioxide;
44/22.4 moles of oxygen will react with excess sulfur dioxide to produce 2 × 44/22.4 moles of sulfur trioxide = 88/22.4 moles of sulfur trioxide
88/22.4 moles of sulfur trioxide will have a volume of 88/22.4 × 22.4 Litres = 88.0 Litres
Therefore, the theoretical yield of sulfur trioxide is 88.0 Litres
Based on the electron configuration of the two atoms, predict the ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the compound. sodium and bromine
Answer:
A. 1:1
Explanation:
The ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound is 1:1 because sodium needs to lose one electron and bromine needs one electron to become stable and complete its outermost shell. When sodium lose electron, it become cation and gain +1 charge while on the other hand, the bromine accept one electron and become anion and gain -1 charge so that's why we can say that there is 1:1 of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound.
If the final mass of the system is 120g, what was the percent yield of the reaction?
Answer:
Sorry for the wrong answer plz
99% was the percent yield of the reaction. So, the correct option is A.
What is Percent yield?Percent yield is defined as the percentage ratio of the actual yield to the theoretical yield. It is a measure of the amount of moles of product formed in relation to the reactant obtained in a chemical reaction, expressed as a percentage.
For percent yield, we have to first find the number of moles.
1 Mg(S) + 2 HCl(Aq) → 1 MgCl2(Aq) + 1 H2(G)
Mole of Mg (s)= Mass of Mg/ Molar mass
=48/24= 2 moles
Moles of HCl= 73/36.5= 2moles
So, 1 mole of Mg reacts with 2 moles of HCl as per the equation which means HCl is the limiting reagent. Mg will act as excess reagent so only 1 mole of Mg will react while the unreacted Mg will be 24g i.e. 1 mole.
The product which is experimental= 120-24= 96g
Theoretical product formed= 1mole of [tex]MgCl_2[/tex]+ 1 mole of HCl= 95+2= 97gm/mole
Percentage Yield = (experimental Yield / Theoretical Yield) × 100 %
= (96/97)*100 = 98.96% which is approx. 99%
Thus, 99% was the percent yield of the reaction. So, the correct option is A.
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Your question is incomplete, most probably the complete question is:
The Following Reaction Is Carried Out:
1 Mg(S) + 2 HCl(Aq) → 1 MgCl2(Aq) + 1 H2(G)
The Initial Masses Of The Uncombined Reactants appear below:
Mass of magnesium- 48g
mass of hydrochloric acid= 73g
The reactants are combined and the final mass of the system is determined. If the final mass of the system is 120g, what was the percent yield of the reaction?
99%50%1%25%At 15 mph, how long does it take to travel 15 miles?
Answer:
1 hour
Explanation:
Travelling at 15 miles per hour will get take 1 hour to travel 15 miles.
A gas has a volume of 240 mL and a pressure of 0.99 atm. If the pressure is decreased to 0.951 atm, what is the new volume of the gas?
V2 = 250 ml
Explanation:
Given:
P1 = 0.99 atm. V1 = 240 ml
P2 = 0.951 atm. V2 = ?
We can use Boyle's law to solve for V2
P1V1 = P2V2
V2 = (P1/P2)V1
= (0.99 atm/0.951 atm)(240 ml)
= 250. ml
Work out the relative formula mass of ammonium nitrate, NH4NO3.
Relative atomic masses: H 1; N 14; O 16.
...........................................................................................................................
...........................................................................................................................
Relative formula mass of ammonium nitrate = ...............................
Answer:
The relative molecular mass of ammonium nitrate is 80 gm
Explanation:
[tex]M_{NH4NO3}[/tex] = 14 + (4 × 1) + 14 + (16 × 3) = 80 (gm)
Which of the following is a secondary pollutant?
A. Water vapor from a factory smokestack
B. Particulate matter, such as soot
Ο Ο Ο Ο
C. Carbon monoxide from car exhaust
D. Acid rain
Answer:
A. Water vapor from a factory smokestack
When the pH of an aqueous solution is 8, what is the OH- ion concentration in moles per liter?
A. 1 × 10-14
B. 1 × 10-8
C. 1 × 10-7
D. 1 × 10-6
Answer:
D. 12 is 1 × 10-6
Explanation:
The answer is Option D is correct , the OH- ion concentration in moles per liter is 1 x 10 ⁻⁶ moles /liter .
What is pH ?
It is a measure of how acidic/basic water is.
The range goes from 0 to 14, with 7 being neutral.
pH less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.
The pH of water is a very important measurement concerning water quality.
pOH = - log [OH⁻]
pH + pOH = 14
We have been given that pH is 8
so pOH will be 14 - 8 = 6
pOH = - log[OH⁻]
[OH⁻] = antilog [- pOH]
[OH⁻] = antilog [-6]
[OH⁻] = 1 x 10 ⁻⁶ moles /liter
Therefore Option D is correct , the OH⁻ ion concentration in moles per liter is 1 x 10 ⁻⁶ moles /liter .
To know more about The answer is Option D is correct , the OH- ion concentration in moles per liter is 1 x 10 ⁻⁶ moles /liter .
What is pH ?
It is a measure of how acidic/basic water is.
The range goes from 0 to 14, with 7 being neutral.
pH less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.
The pH of water is a very important measurement concerning water quality.
pOH = - log [OH⁻]
pH + pOH = 14
We have been given that pH is 8
so pOH will be 14 - 8 = 6
pOH = - log[OH⁻]
[OH⁻] = antilog [- pOH]
[OH⁻] = antilog [-6]
[OH⁻] = 1 x 10 ⁻⁶ moles /liter
Therefore Option D is correct , the OH⁻ ion concentration in moles per liter is 1 x 10 ⁻⁶ moles /liter .
To know more about pH
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PLZ ANSWER
Unit Activity: Kinetic Molecular Theory and Gas Laws
Part A
What is the composition and percentage of the gases in Earth’s atmosphere?
Part B
List in ascending order the different layers of atmosphere, their heights, and main features.
Part C
Why are the gases in the troposphere layer denser than the gases in the other layers? Give reasons for your answer.
Part D
How does the kinetic theory of gases explain the weather changes happening in the troposphere? You can also research on the Internet using keywords such as troposphere, atmospheric layers, and weather changes.
Answer:
part a
Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent
part B
The atmospheric layers are as follows.
Troposphere : The Troposphere is the atmospheric layer closest to the Earth. ...
Stratosphere : The Stratosphere is just above the troposphere, starting at an average altitude of about 7 miles above the sea level. ...
Mesosphere : ...
Thermosphere : ...
Ionosphere : ...
Exosphere :
part c
The troposphere is denser than all its overlying atmospheric layers because a larger atmospheric weight sits on top of the troposphere and causes it to be most severely compressed. ... Nearly all atmospheric water vapor or moisture is found in the troposphere, so it is the layer where most of Earth's weather takes place
part D
It also states that the average kinetic energy of gas molecules is proportional to its temperature. Scientists know that the uneven heating of the Earth is what causes wind and weather in the troposphere
these are the correct answers
please mark brainliest
Answer:
part a
Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent
part B
The atmospheric layers are as follows.
Troposphere : The Troposphere is the atmospheric layer closest to the Earth. ...
Stratosphere : The Stratosphere is just above the troposphere, starting at an average altitude of about 7 miles above the sea level. ...
Mesosphere : ...
Thermosphere : ...
Ionosphere : ...
Exosphere :
part c
The troposphere is denser than all its overlying atmospheric layers because a larger atmospheric weight sits on top of the troposphere and causes it to be most severely compressed. ... Nearly all atmospheric water vapor or moisture is found in the troposphere, so it is the layer where most of Earth's weather takes place
part D
It also states that the average kinetic energy of gas molecules is proportional to its temperature. Scientists know that the uneven heating of the Earth is what causes wind and weather in the troposphere
Explanation:
plato
Is this equation right?
Answer:
no
Explanation:
because the characters are invalid
Answer:
no
Explanation:
because they are not valid
PLS HELP ASAP NO LINKS PLS
How long is radioactive waste from nuclear plants radioactive?
1,000 years
10,000 years
100 years
100,000 years
Answer:
1000 years.
Explanation:
I'm not shure how to explain. it is a facr
Name this compound according to IUPAC nomenclature rules.
A) nitrogen oxide
B) nitrogen oxygen
C) nitrogen monoxide
D) Mononitrogen monoxide
Answer:
B: nitrogen oxygen
Explanation:
Hope it helps you thanks!!
Find the pH of a solution with a [H+] of 0.045M.
Answer:
1.35Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log ([ {H}^{+} ])[/tex]
From the question
[H+] = 0.045 M
We have
[tex]pH = - log(0.045) \\ = 1.346787...[/tex]
We have the final answer as
1.35Hope this helps you
Answer:
1.35
Explanation:
How much heat is required to raise the temperature of a sample of copper from 0.0°C to 55.0°C, if its specific heat is 0.384 J/g°C and its mass is 10.00 g? Group of answer choices 351.4 2110 211.2 3.54
Answer:
211.2 J
Explanation:
Applying
Q = cm(t₁-t₂)............... Equation 1
Where Q = Amount of heat, c = specific heat capacity of copper, m = mass of copper, t₁ = initial temperature, t₂ = final temperature.
From the question,
Given: c = 0.384 J/g°C, m = 10 g, t₁ = 0°C, t₂ = 55°C
Substitute these value into equation 1
Q = 0.384×10×(55-0)
Q = 0.384×10×55
Q = 211.2 J
How do the circulatory system and respiratory system interact and work together?
I would say because the respiratory system brings in the oxygen for the body and the circulatory system moves it throughout the body with the blood
Answer:
The respiratory system helps you breath meanwhile your circulatory system helps the oxygen circulate in your blood throughout your body.
Explanation:
It helps you do many tasks like running, sprinting, etc.
Which of these is true for a fission reaction?
A. it is an endothermic reaction
B.a heavy nucleus splits into two smaller nuclei
C.two light nuclei combine to form a single heavier nucleus
D.it is an interaction between valence electrons of a atom.
Answer:
Explanation:
The answer is B heavy nucleus splits into two smaller nuclei
What is Dalton’s Law as it applies to partial pressures?
Answer:
According to Dalton's law of partial pressures, the total pressure by a mixture of gases is equal to the sum of the partial pressures of each of the constituent gases. The partial pressure is defined as the pressure each gas would exert if it alone occupied the volume of the mixture at the same temperature.
Help
Please
Brainest for whoever gets it correct
Answer: Salt
Explanation:
Which of the following is the same as 1 second?
O A. 1,000 ks
B. 0.1 ms
C. 100 cs
D. 100 ms
Fullerenes (like the one shown) are made up of hexagonal rings of carbon atoms (like in graphite or graphene) and alternating pentagonal and heptagonal carbon rings to allow curvature of the surface producing molecules that have a complete hollow shape.
The extremely small diameter of the nanoparticle fullerenes (which act like a cage) allows them to readily pass through cell membranes and be readily absorbed into the body.
What potential benefit does this have in the pharmaceutical industry as well as medicine?
A)
The very small fullerene molecules would keep cancer cells from invading other healthy cells. As a result, it would keep cancer from spreading.
B)
The very small fullerene molecules could allow surgeons to see the insides of cells with tiny cameras as they perform complex surgery.
C)
The very small fullerene molecules could obstruct hazardous chemicals from getting into absorbed into cells.
D)
The very small fullerene molecules could easily deliver drugs directly into cells in a highly controlled manner.
Answer:
Your answer choice is D
Explanation:
I just got it right on USATestprep :))
less energy was entering Earth's
2. When more energy enters than exits the Earth system, what happens to temperatures on Earth?
(select one)
The temperatures on Earth increase
The temperatures on Earth decrease
The temperatures on Earth do not change
「ロロロ
Answer:
The temperatures on Earth increase
Explanation:
more energy results in more heat.
Please and thank you in advance. Due today
Answer:
Sorry I really don't know but can you help with one of my question I posted please thanks.
This gardener started with much smaller plants in this park. Over time, the garden has grown into a large display of brilliant flowers. What would you tell the gardener to explain how the plants have grown and flourished so successfully?