which of the following changes different colours in alkalis,acids,and neutral substances?
A red litmus paper
B Blue litmus paper
C universal indicator
D all of the above
list two examples of agroecology methods used in Burkina Faso. Dirt! The movie
Examples of agroecology method use are in Burkina Faso are conservation tillage, green manures, natural fertilisers, biological predators and so on.
What is Agroecology?Agroecology refer to an approach that use ecological processes in agricultural production systems.
The benefits of Agroecology is that it help to protect, restore and also improve agriculture and food systems when there is climate shocks and unfavorable weather conditions.
Therefore, Examples of agroecology method use are in Burkina Faso are conservation tillage, green manures, natural fertilisers, biological predators and so on.
Learn more about agroecology here.
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Why is Seabrook Station the only nuclear power plant in New Hampshire?
After some wood has completely burned in a fire some of the matter that made up the wood has been destroyed
Answer:
Because it went through a chemical change which changes its atomic form
A liquid form of matter has less heat than when it is in __________ form.
solid
molecule
gas
what is the volume of 0.4 mole of gas at stp? 30 points!
Answer:
89.6 liters
Explanation:
A STP (standard temperature and pressure) ONE mole of any idea gas will occupies 22.4 liters. So,...
4 moles x 22.4 L/mol = 89.6 liters
8.96 L is the answer
Many cultures eat grasshoppers, what nutrients do grasshoppers have that is good for you?
Answer:
Grasshoppers are a good source of unsaturated fats and they can lower risk of diseases.
Explanation:
In the important industrial process for producing ammonia (the Haber Process), the overall reaction is:
N2(g) + 3H2(g) - 2NH3(g) + 100.4 kJ
A yield of NH3 of approximately 98% can be obtained at 200°C and 1,000 atmospheres of pressure.
This reaction is:
In the important industrial process for producing ammonia (the Haber Process), the overall reaction is:
N2(g) + 3H2(g) → 2NH3(g) + 100.4 kJ
A yield of NH3 of approximately 98% can be obtained at 200°C and 1,000 atmospheres of pressure.
This reaction is: Endothermic
What is the pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K?
The pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K is 2.67atm.
How to calculate pressure?The pressure of a given mass of gas can be calculated using the following formula:
PV = nRT
Where;
P = pressureV = volumeT = temperaturen = no of molesR = gas law constantThe number of moles in 50.5g of Chlorine gas is as follows:
moles = 50.5/70.91
moles = 0.71mol
P × 8 = 0.71 × 0.0821 × 365
8P = 21..34
P = 21.34/8
P = 2.67atm
Therefore, the pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K is 2.67atm.
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How many moles of lead chloride pbCl2, will be produced if 10.0 moles of Orion chloride FeCl33 reacted
Answer:
0.72 moles of hydrochloric acid are needed to completely react with 0.36 mol of lead.
Explanation:
I hope this helps you! :)
which has a positive impact on land
a.composing
b. deforestation
c. mining
d. urbanization
giving brainiest
[tex]\huge\tt\fbox\pink{↪Answer:–}[/tex]
[tex]▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬[/tex]
[tex]\red\bigstar\:Explanation [/tex]
Option c Deforestation.[tex]▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬[/tex]
I hope it will help you.Answer:
In some cases, changes in land use may have positive effects, such as increasing habitat (as a result of deliberate habitat restoration measures) and reclamation of previously contaminated lands for urban/suburban development.
Explanation:
BBBBBBBB
Gold can be found in native or pure state in nature why? Write any one anyone application of sulphur
Answer:
Sulphur is used in making car batteries and fertlizers
Answer:
Gold is almost found in its pure state. Because gold does not react with other elements or compounds easily. Elemental sulfur is used in black gunpowder, matches, and fireworks; in the vulcanization of rubber; as a fungicide, insecticide, and fumigant; in the manufacture of phosphate fertilizers; and in the treatment of certain skin diseases. The principal use of sulfur, however, is in the preparation of its compounds.
Which statement below describes the location of nonmetals on the periodic table?
Answer:
Nonmetals are located on the upper right side of the Periodic table (see above image). Exception: Hydrogen is a nonmetal which is located on the left top corner of the Periodic table. Well, you have got the answer of “Where are Nonmetals located on the Periodic Table?”
Explanation:
how many miles of oxygen gas were used to produce 8.0 moles of water
Answer:
4 moles
Explanation:
Oxygen gas is O2 (two atoms of oxygen)
2 H2 + O2 = 2 H2 O
one mole of oxygen gas produces TWO moles of water
so you need 4 moles of O2 to produce 8 moles of water
In 1–2 sentences, explain what biome comprises most of Antarctica and why the continent is described as being part of this biome.
please answer in own words thank you
and i give brainlist
The biome which comprises most of Antarctica is the cold desert or polar desert.
What is a Biome?This is defined as an area which is classified according to the species that live there.
The climate of Antarctica is very cold with very little life forms which is why it is referred to as a cold desert or polar desert.
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Predict: How do you think you could use the Gizmo to make the color gray? _____________
_________________________________________________________________________
Observe: Change the Red, Green, and Blue values to 90. What color does this produce?
_________________________________________________________________________
Grey basically is formed by combining black and white colors together.
In this case, one would have to explore other options.
What kind of colors will form grey?The following color combinations can form grey:
By adjusting the other colors, variations of hue will be observed. It is to be noted that the Gizmo is unaccessible on this platform hence the general answer.
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PLEASEE HELPPP
what is the ph of 1.0 times 10^-2 M HBr
Answer:
The pH of a solution with the [H + ] = 1 × 10 -2 M is 2 and the pH of a solution with the [H + ] = 1 × 10 -10 M is 10. ( I think this is correct ).
Explanation:
How many moles of H2 can be made from the complete reaction of 3.7 moles of Al?
Given: 2 Al + 6 HCl → 2 AlCl3. + 3 H2
Answer:
5.55moles
Explanation:
[tex]2moles \: of \: aluminium = 3 \: moles \: of \: h2 \\ 3.7moles \: aluminium = x \\ 2x = 3.7 \times 3 \\ 2x = 11.1 \\ x = \frac{11.1}{2 } \\ x = 5.55moles[/tex]
A ____________ is required to transfer dna sequences from one organism to another.
genomic library
genetic probe
vector
restriction endonuclease
reporter gene
Calculate the mass of sample of calcium carbonate containing 5.5 x 10^23 atoms
A. 18.29 g
B. 91.44 g
C. 6.02 x 10^23g
D. not enough information
which one is it?? thank you
No of moles:-
No of molecules/Avagadro no5.5×10²³÷6.022×10²³0.91molNow
molar mass:-
CaCO_340+12+48100g/molMass:-
100(0.91)91gOption B
What is the most commonly preferred pH range for soil?
Group of answer choices
7.5 to 9.0
6.2 to 7.0
3.2 to 4.5
Answer:
6.2 to 7.0
Explanation:
The “ideal” soil pH is close to neutral, and neutral soils are considered to fall within a range from a slightly acidic pH of 6.2-6.5 to slightly alkaline pH of 7.0-7.5. It has been determined that most plant nutrients are optimally available to plants within this 6.5 to 7.5 pH range, plus this range of pH is generally very compatible to plant root growth.
:-befrank
What is symbol? write the sugnifucance of Na2Co3
Answer:
A chemical symbol is a notation of one or two letters representing a chemical element.
Na2co3`s use :
It is used in photography
It is used as bleaching of wool
Working with a strong acid, such as sulfuric or nitric acid, requires special care to strictly avoid contact with the acid. What should you do if do come in contact with the acid despite your best efforts?.
Answer:
immediately flush the affected area gently with lukewarm water for at least 30 uninterrupted minutes
Explanation:
If strong acid comes into contact with the skin, immediately wash the affected area gently with lukewarm water for at least 30 minutes and get medical attention immediately.
How to care for acid exposure?
Exposure to strong acids such as sulphuric acid can occur as skin contact, ingestion, or inhalation of vapors. Each kind of exposure can create serious hazards to health and should be managed quickly and appropriately by medical professionals to reduce damage and health risks.
If strong acid comes into contact with the skin, quickly flush the affected area gently with cold water for at least 30 minutes and seek medical attention immediately. If strong acid gets into your eyes, then flush the eye(s) with water for 30 minutes.
If accidentally ingest strong acid, rinse your mouth with water immediately. But do not induce vomiting and continually rinse your mouth with water. If you inhale strong acid aerosols, get fresh air, and medical attention immediately.
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#SPJ2
A certain gas has a volume of 500.0 ml at 77.0c and 600.0 torr. calculate the temperature if the volume decreased to 400.0 ml and the pressure is increased to 760. torr and assume the number of moles does not change.
As the volume is decreased and the pressure is increased to the given value, the temperature of the gas increases to 81.67°C.
Given the data in the question;
Initial volume of gas; [tex]V_1 = 500.0ml = 0.5L[/tex]Initial pressure; [tex]P_1 = 600.0torr = 0.789474atm[/tex]Initial temperature; [tex]T_1 = 77.0^oC = 350.15K[/tex]Final Volume; [tex]V_2 = 400.0ml = 0.4L[/tex]Final pressure; [tex]P_2 = 760torr = 1.0atm[/tex]Final temperature; [tex]T_2 =\ ?[/tex]Combined gas lawCombined gas law brings together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.
It is expressed as;
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]
We substitute our given values into the expression above to determine the new temperature.
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}\\\\P_1V_1T_2 = P_2V_2T_1\\\\T_2 = \frac{P_2V_2T_1}{P_1V_1}\\T_2 = \frac{1.0atm\ *\ 0.4L\ *\ 350.15K}{0.789474atm\ *\ 0.5L} \\\\T_2 = \frac{140.06LatmK}{0.394737Latm}\\ \\T_2 = 354.82K\\\\T_2 = 81.67^oC[/tex]
Therefore, as the volume is decreased and the pressure is increased to the given value, the temperature of the gas increases to 81.67°C.
Learn more about the combined gas law here: brainly.com/question/25944795
Each of the colored lines in hydrogen's emission spectrum corresponds with the
A) energy released by the electrons as they orbit the nucleus.
B) the ionization energy of the electron when forming chemical bonds.
C) transition of an electron from a higher energy level to a lower energy level.
D) transition of an electron from a lower energy level to a higher energy level
when excited.
Each of the colored lines in hydrogen's emission spectrum corresponds with the C. transition of an electron from a higher energy level to a lower energy level.
What is an emission spectrum?An emission spectrum can be defined as the range of wavelengths, frequencies or pattern of bright lines which can be seen when the electromagnetic radiation that are emitted by an atom of a chemical compound (substance) moves through a spectrometer.
Generally, this process leads to the quantization or transfer of an electron from one energy level to another such as the transition of an electron from a energy level of higher magnitude to a lower energy level in hydrogen's emission spectrum.
Read more on electrons here: https://brainly.com/question/16554158
If 2.00 grams of zinc are added to an excess of hydrochloric acid,
what is the volume, in liters, of hydrogen gas is produced?
Answer:
Zinc metal reacts with excess hydrochloric acid to produce hydrogen gas
Explanation: Acording to the following equation:
Zn(s) + 2HCl(aq)ZnCl2(aq) + H2(g)
The product gas, H2, is collected over water at a temperature of 20 °C and a pressure of 753 mm Hg. If the wet H2 gas formed occupies a volume of 5.39 L, the number of moles of Zn reacted was mol. The vapor pressure of water is 17.5 mm Hg at 20 °C.
What is the pressure in atm of a 5. 00 l tank with 2. 50 moles of oxygen
at 39. 3 °c?
1
4
7
Answer:
1
Explanation:
help I would really appreciate it tyy!!
Answer:
This image attached should help:
Explanation:
The reason that food web contains all organisms is because it shows every relationship, where food chain shows a more basic one. And the reason that they both have producers, consumers, and decomposers, is because they bothat least highlight a part of the almost every aspect, although it leans more to food web.
here's the answer to the question in the image, I couldn't comment on the right question because a bot already did.
1. ant, love
active
2. dog, man
dormant
3. bug, ring
burning
4. dress, up
pressure
5. think, tiger
trinker
The field of corn shown below was grown with 250 L/ha herbicide and no insecticide. Based what do you observe work what’s the resistance type of the corn?
A)None
B)Herbicide
C) Caterpillars
D) Caterpillars and herbicide
Based on the fact that only herbicide was used to grow the corn, this means that the resistance type of the corn are caterpillars.
What are herbicide and insecticide?Herbicide are chemicals used to control and kill weeds that could hinder crop production while insecticides are chemicals used to control insect pests.
According to this question, a field of corn was grown with 250 L/ha herbicide and no insecticide. This means that only herbs or weeds are being controlled on the field.
Therefore, it can be said that the corn plants are the type that are resistant to caterpillars, which are examples of insects.
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Magnesiumn reacts with hydrochloric acid to produce magnesium chloride
and hydrogen,
Plan an investigation to find the accurate volume of hydrogen produced
from magnesium.
You do not need to write about safety precautions.
Answer:
To investigate the effect of changing the conditions on the rate of a reaction.
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g
The volume of hydrogen gas produced can be measured using a gas syringe.
Method:-
- Support a gas syringe with a stand, boss and clamp.
- Using a measuring cylinder, add 50 cm3 of dilute hydrochloric acid to a conical flask.
- Add a 3 cm piece of magnesium ribbon to the flask. Immediately connect the gas syringe and start a stop clock.
- Record the volume of gas produced every 5 seconds. Continue timing until no more gas is given off.
- When the reaction is complete, clean the apparatus as directed by your teacher.
- Repeat steps 1 to 5 with different concentrations of hydrochloric acid.
I hope my answer helps you.