Answer:
Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus. ... Oxygen is normally found as a
__FeCl3 —> _Fe + _C12 type of reaction
Answer:
In image :)
Explanation:
Question 13 131 (i) Consider the amount of organic matter at the different trophic levels in an ecosystem given below: Trophic Level Amount of organic matter (in kg) 250 Tertiary consumers 150 Primary consumers 100 200 Primary producers Secondary Consumers On the basis of the data provided above, construct an ecological pyramid. Comment upon its nature giving at least one example of the type of organism occupying each of the above mentioned trophic levels.
primary producers: Phytoplankton
Primary consumers: Zooplankton
secondary consumers: Small fishes
Tertiary consumers: Large fishes
Ecological PyramidAn ecological Pyramid is a graphical representation of the feeding relationship that exists between group of organisms in an ecosystem.
Inverted pyramids occurs in the aquatic ecosystem where
the biomass or organic matter of the fishes exceeds that is the primary producers.
The primary producer are the phytoplankton with the lowest organic matter if 100kg weight.
The primary consumers are the zooplankton with organic matter of 150kg in weight.
The secondary consumers are the small fishes with the organic matter that weighs 200kg.
The tertiary consumers are the large fishes with the organic matter that weighs 250kg.
The mass of organic matter represents the mass of living things in a particular trophic level. This is illustrated further in the attached diagram.
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4. What happens to the humidity if the temperature drops and the amount of moisture in the air remains the same?
Answer:
Explanation: If the water vapor content stays the same and the temperature drops, the relative humidity increases. If the water vapor content stays the same and the temperature rises, the relative humidity decreases. This is because colder air doesn't require as much moisture to become saturated as warmer air.
Write the balanced equation for the rusting of iron in which iron reacts with oxygen to form iron(III) oxide. Phases are optional.
Answer:
1.) First thing to recognize is that it requires you to know the molecular formula for Iron(III) Oxide, which is Fe2O3. If you don't know this formula in all textbooks there is a page that has it and other compounds listed. I would encourage you to review this page and memorize the other compounds as these compounds will come up in future questions.
2.) Now we will write an unbalanced equation, keeping in mind that molecular oxygen( O2) is used:
Fe + O2 ==> Fe2O3
3.) In balancing problems, I like to always start with Oxygen. Because there are 2 oxygen atoms on the reactant side and three on the product side and we know that both of these numbers go into 6, we will use this to balance the oxygen. We will put a e in front of the molecular Oxygen and a 2 in front of the iron(III) oxide. This will balance the oxygens.
Fe + 3O2 ==> 2Fe2O3
However, notice now that the iron is still out of balance, This can be easily solved by having a 4 in front of the iron. Now everything is balanced!
4Fe + 3O2 ==> 2Fe2O3
Explanation:
Which type of silk is the strongest? (1 po o nonbiodegradable
minor ampullate
biodegradable
major ampullate
Answer:
d. major ampullate
Hydrogen (H2) and oxygen (O2) combine to make water (H2O) in the following equation.
6H2 + 3O2 → ?H2O
How many water molecules would be produced?
Can you please post all the answers for Claiming Conservation Quick Check to check my answers.
The number of water molecules that would be produced will be 6.
Law of conservation of matterAccording to this law, matter/mass is conserved in reactions. In other words, matters/mass is not lost but can be converted from one form to another.
In this case, the balanced equation that shows the law of conservation will be:
6H2 + 3O2 → 6H2O
The number of H2 and O2 in the reactant and product sides is balanced
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Answer:1-6
2-12 oxygen atoms
3- reactant binds break and atoms rearrange to form new product combinations
4-2
5- no, it does not because the number and mass of atoms are conserved even though the number of molecules is not
Explanation:
just took it
1. A spiderweb and a Kevlar jacket have some obvious differences. Which property is similar between the web and the jacket?
- surface area
- thickness, expressed as a number of atoms
- overall strength
- arrangement of atoms in molecules
2. Assuming silk from spiderwebs could be made just as strong as Kevlar, why would a company still choose to use Kevlar in producing bulletproof fabrics?
- A much larger amount of silk might be needed to produce the same effect.
- Spiderweb silk would likely be rejected by the body.
- The cost might be higher for producing spiderweb silk.
- Spiderweb silk likely involves more chemicals.
3. Which microscopic detail affects the strength of different forms of silk?
- Different silk strands are made with different types of atoms.
- Different types of silk are in long strands or in other very different arrangements.
- Different silk strands have different combinations of amino acids.
- Different types of silk do not have the same strength if they come from different sources.
4. Which type silk is the strongest?
- nonbiodegradable
- minor ampullate
- major ampullate
- biodegradable
5. Which natural source has been bioengineered to make silk proteins?
- mulberry leaves
- goat milk
- goat hair
- mulberry bark
help me. I will give brainliest.
There are different sources of fibres which can be genetically engineered for living organisms like the spider.
The fibre silk gotten from spiders are known to be the strongest, toughest materials on the Earth. But recently, engineers has designed amyloid silk hybrid proteins and produced them in engineered bacteria.
Even though these synthetically produced fibres are stronger than Kevlar, they prefer to use Kevlar because a much larger amount of silk might be needed to produce the same effect.
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Answer:
1.Arrangement of atoms in molecules
2.The cost might be higher for producing spiderweb silk
3.Different silk strands have different combinations of amino acids
4.Major ampullate
5.Goat milk
If he has an excess of ammonium sulfide and 125.0 mL of a 1.51 M solution of Al(NO3)3, how many
grams of aluminum sulfide can he make?
The mass of the aluminum sulfide, Al₂S₃, that can be produced from the reaction is 14.16 g
How to determine the mole of Al(NO₃)₃Volume = 125 mL = 125 / 1000 = 0.125 L Molarity of Al(NO₃)₃ = 1.51 MMole of Al(NO₃)₃ =?
Mole = Molarity x Volume
Mole of Al(NO₃)₃ = 1.51 × 0.125
Mole of Al(NO₃)₃ = 0.18875 mole
How to determine the mole of Al₂S₃ producedBalanced equation
2Al(NO₃)₃ + 3(NH₄)₂S → Al₂S₃ + 6NH₄NO₃
From the balanced equation above,
2 moles of Al(NO₃)₃ reacted to produce 1 mole of Al₂S₃
Therefore,
0.18875 mole of Al(NO₃)₃ will react to produce = 0.18875 / 2 = 0.094375 mole of Al₂S₃
How to determine the mass of Al₂S₃ produced Mole of Al₂S₃ = 0.094375 moleMolar mass of Al₂S₃ = (27×2) +(32×3) = 150 g/mol Mass of Al₂S₃ =?Mass = mole × molar mass
Mass of Al₂S₃ = 0.094375 × 150
Mass of Al₂S₃ = 14.16 g
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What is the product(s) in the reaction below?
CH4(g)202(g)→ CO2(g) + 2H20(g)
Answer:
It is an example of Exothermic reaction.
Explanation:
It leads to release of HEAT as can be seen water is given in gaseous form.
EXPLAIN How would you explain the difference between single displacement and
double displacement reactions to someone who was unfamiliar with chemical equations?
Explanation:
in the chemical reaction an atom in a molecule is replaced by another atom forming the end product .this type of chemical reaction involved only two reactants for example zinc + copper sulphate give us copper sulphate + copper.double displacement reaction is the reaction in which two compounds react together to form two other compounds by mutual exchange of other ions is called double displacement reaction.this type of reaction is involved two or more than two reactants.for example AG and O3 + NaCl give us agcl + nano3
Helpppp!!!!!!!<(￣︶￣)>
The condition of free vaporisation throughout the liquid is called
(4) BoilingWe can also define it as Free vaporisation throughout the liquid is called boiling, basically its the definition of boiling.
*Note that:- The temperature at which vapour pressure of liquid is equal to external pressure is called Boiling temperature..
Helpppp!!!^_________^
Answer:
Standard boiling point
Explanation:
Note that there are 2 major units of pressure except Pa .
baratmAt 1 atm pressure the boiling temperature is called normal boiling point.
At 1 bar pressure the boiling temperature is called standard boiling point
Help please!!! My science homework is due in 2 days and I need help!
~
ROR
what will be the reading on the ammeter A² be?
and pls answer quickly with explaining the formula
No need formula to explain this since it's mainly theory.
In a series circuit, the reading on the ammeter stays the same throughout, this is since current (in the circuit) doesn't change in a series circuit.
so A1 = A2 = An (n meaning any number of ammeters within the circuit)
A cylinder with a movable piston originally has a volume of 2805 mL and is filled with nitrogen to a pressure of 4.00
atm. The piston is then allowed to move outward until the volume of the cylinder is 3864 mL. What is the pressure
of nitrogen in atm in the cylinder at this point? The temperature of the cylinder remains constant at -5°C. Your
answer must have the correct number of sig figs. P =
atm
This problem is providing the initial volume and pressure of nitrogen in a piston-cylinder system and asks for the final pressure it will have when the volume increases. At the end, the answer turns out to be 2.90 atm.
Boyle's lawIn chemistry, gas laws are used so as to understand the volume-pressure-temperature-moles behavior in ideal gases and relate different pairs of variables.
In this case, we focus on the Boyle's law as an inversely proportional relationship between both pressure and volume at constant both temperature and moles:
[tex]P_1V_1=P_2V_2[/tex]
Thus, we solve for the final pressure by dividing both sides by V2:
[tex]P_2=\frac{P_1V_1}{V_2}[/tex]
Hence, we plug in both the initial pressure and volume and final volume in order to calculate the final pressure:
[tex]P_2=\frac{2805mL*4.00atm}{3864mL}\\ \\P_2=2.90atm[/tex]
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Examples of static electricity
Answer:
Nylon Clothes. When the clothes made up of nylon are rubbed against some other fabric or against the wearer's skin, static electricity is formed.
Explanation:
Hope this helps
Answer:
when you rub a balloon on your hair and it stands up
Explanation:
Will nuclear fusion be used for power on other planets?.
Answer: Hope that helps!
Explanation: Researchers at NASA and the Department of Energy recently tested key technologies for developing a nuclear fission reactor that could power a human outpost on the moon or Mars. The tests prove that the agencies could build a “safe, reliable, and efficient” system by 2020, the year NASA plans to return humans to the moon.
Emma created a table to describe the weather conditions in her area on a specific day. What units of measurement can be used for precipitation with mm or inches being correct?
Precipitation Air Temperature
25 °C
Sunny
The units of measurement that can be used for precipitation with mm or inches is precipitation, and air temperature.
What units is used to measure temperature and precipitation?The Temperature is known to be how hot or cold the air or atmosphere is. It is often measured by the used of a thermometer (in Celsius (C) or Fahrenheit (F), or Kelvin (K) ).
The unit of measurement for precipitation is said to be in millimeters. The unit is known to be in linear depth, that is in millimeters (for volume/area), or in kg m–2 (for the mass/ area).
See full question below
A is air pressure and is a temperature
O A is humidity and precipitation
O A is precipitation, and B is air temperature
O A is wind speed, and B is humidity
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Draw both resonance structures of the most stable carbocation intermediate in the reaction shown.
Answer:
Hi
Explanation:
I had the same exact problem and this is how to solve it.
What is the name of the tectonic plate that the ring of fire encircles.
Answer:
Circum-Pacific Belt/Pacific Plate
Explanation:
According to National Geographic, the Ring of Fire is also known as the Circum-Pacific Belt, the Ring of Fire traces the meeting points of many tectonic plates, including the Eurasian, North American, Juan de Fuca, Cocos, Caribbean, Nazca, Antarctic, Indian, Australian, Philippine, and other smaller plates, which all encircle the large Pacific Plate.
The name of the tectonic plate that the ring of fire encircles is pacific plate.
What is tectonic plate?Plate tectonics is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large tectonic plates which have been slowly moving since about 3.4 billion years ago.The model builds on the concept of continental drift, an idea developed during the first decades of the 20th century. Plate tectonics came to be generally accepted by geoscientists after seafloor spreading was validated in the mid to late 1960s.
Earth's lithosphere, which is the rigid outermost shell of the planet (the crust and upper mantle), is broken into seven or eight major plates )and many minor plates or "platelets". Where the plates meet, their relative motion determines the type of plate boundary: convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries .
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The main chemical in the atmosphere of Venus is carbon dioxide. How does this compare with the atmosphere of Earth?
A carbon dioxide is not found in the atmosphere of earth
B carbon dioxide makes up a small part of the atmosphere of earth
C carbon dioxide is the main chemical in the atmosphere of earth
D carbon dioxide is found in the atmosphere of earth only near volcanoes
Answer:
B. Carbon dioxide makes up a small part of the atmosphere of earth
Explanation:
When you look at the air that you breathe, you will say, that you breathe Oxygen, but actually, you breathe 71% nitrogen, then 28% oxygen, then 1% of many different gases like Argon, and Carbon Dioxide. That 1% is very less compared to 100%, so that's why, hence, your answer is that carbon dioxide makes up a small part of the atmosphere of Earth.
Thanks!
MiniMeteorologist
How many laws are there of thermodynamics?
Answer:
3
Explanation:
thermodynamics has three fundamental laws
1st Law of Thermodynamics - Energy cannot be created or destroyed.
2nd Law of Thermodynamics - For a spontaneous process, the entropy of the universe increases.
3rd Law of Thermodynamics - A perfect crystal at zero Kelvin has zero entropy.
Draw the following circuits:
a) A cell in series with a bulb and a switch
b) A cell in series with two bulbs and a switch
c) Two cells in series with a bulb, and a second bulb in series with the first
d) Three cells in series with a bulb and a motor
e) A cell in series with a bulb. Add an ammeter to measure the current through the bulb and a voltmeter to measure the potential difference across the bulb
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How many grams of CO2 will dissolve in 580. g water at 60.°C?
Answer:
128gCaCl2 per 200gH2O
Explanation:
I might be wrong rlly srry if I am:/ Hope this helps doe have a wonderful day
Are fire matches Ionic or molecular?
5.00 g of solid silver nitrate AgNO3 is added to 100ml of deionized H2O to make a substance that can test the presence of chlorine in water. Identify in the word problem each of the following: (1pt each).
What is the solvent?
What is the solute?
What is the solution?
Answer:
The solvent is deionised water
The solute is AgNO3
The solution is [Ag(aq) + NO3(aq)-]
Explanation:
This is because it contains no ions which would otherwise react with AgNO3 thus AgNO3 just disolves releasing free Ag+ and NO3- . The resiltant solution can test for Cl presenceAgNO3 is a soluble salt in water thus disolves in waterAgNO3 disolves releasing free ions which can be called ionisationObject A and Object B have the same temperature, but object B
has a greater mass. Which object will have the greater thermal
energy? Explain your reasoning.
Answer:
object A
Explanation:
since it has less mass it will have greater thermal conductivity
Someone please answer i’ll give brainliest
Consider two substances, A and B. Substance A has a larger molar mass than Substance B. State wheter you agree or disagrees with each of the following claims about these subtances. Justify your choice. (a) If you have an equal number of moles of substance A and B, you have a larger mass of substance B. Explain your choice for the above question , 2a .
Answer:
A) wrong. The molar is same so A is hevier
B)
Explanation:
Xg/mol × (same molar)= g
→ bigger molar bigger mass
Will give brainliest!! Give an example of a food chain with at least four links.
Answer:
A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass.
Explanation:
a set of pulleys is used to lift a piano weighing 1,000 netwons. the piano is lifted 3 meters in 60 seconds. How much power is used
P = W/t
P = F.s/t
P = 1000.3/60
P = 50 watt
Answer:
50 watts
Explanation:
Formula
Power = Work / time
Work = Force * distance Substitute the formula for work into power
Power = Force * distance / time
Givens
F = 1000 N
d = 3 meters
t = 60 seconds
Solution
Put the givens into the power formula
Power = 1000 * 3 / 60
Power = 50 watts
