Air pollution must affect lichen growth because lichens have no roots they get all their nutrients from the air. If the air has pollutants that can become toxic for lichens.
What are lichens?A lichen can be described as a composite organism that arises from algae or cyanobacteria living among filaments of fungi species in a mutualistic relationship. Lichens have different properties that come in many colors, sizes, and forms.
A macro lichen can be defined as a lichen that is either bush-like or leafy. Lichens do not have roots therefore they absorb water and nutrients as plants do but like plants, they form their own nutrition by photosynthesis.
If lichens are exposed to air pollutants they are unable to avoid the accumulation of air pollutants. Because lichens possess no roots, their primary source of most nutrients is the air.
Lichen decline can be because of the accumulation of toxic substances as well as altered nutrient supplies that favor one symbiont over the other. Therefore, option (A) is correct.
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I need help with question 4!!!!!!!
*Please choose correctly*
Thank youuuu
Answer:
hshzjndbejkxn. znkskakannamzm msk
How many miles will a person run a 400 km race?
Answer:
248.548
Explanation:
Name 5 things that the periodic table includes about 1 atom for each element:
1.
2.
3.
4.
5.
Answer:
They are listed below
Explanation:
The 5 things that the periodic table includes are;
1. Name of the element
2. The symbol of the element
3. Atomic number of the element
4. Relative atomic mass
5. Electron configuration
AgNO3 ionic or covalent
Answer:
what i need more details
Explanation:
Answer:
Ionic
Explanation:
AgNO3 is also highly soluble in water. Ionic means that the compound is composed of ions.
What is the amount of aluminum chloride produced from 40 moles of chlorine and excess aluminum?
Answer: Molar mass of Al = 26.98 g/mol
mass of Al = 12 g
mol of Al = (mass)/(molar mass)
= 12/26.98
= 0.4448 mol
According to balanced equation
mol of AlCl3 formed = moles of Al
= 0.4448 mol
Answer: 0.445 mol
hope this help boo❤️❤️❤️
Explanation:
Most chemical reactions have what
Answer:
The first one
Explanation:
Hope it helps
Answer:
I think it would be: have starting substances that collide with each other
Explanation:
Two or more reactants interact to create different substances called products.
Express the percent composition of each
element in C10H8.
Answer:
Element Symbol Mass percent
Carbon C 93.7088
Hydrogen H 6.2912
How is the earth's crust different from the mantle?
A : The crust is deeper below Earth’s surface than the mantle
B : the crust is less dense than the mantle
C : the crust contains softer rock than the mantle
D : the crust is made of more iron than the mantle
( this is science by the way )
Answer:
the answer is B
Explanation:
please tell if correct or not and can you give brainliest
Answer:
well i would say D
Explanation:
the crust in fact does have more iron within in it but if i describe it more i would say the crust is a smaller amount then the mantle, and that its a bit harder material then the mantle itself
PPPPPPPPLLLLLLLLLSSSSSS HHHHHHEEEEEELLLLPPPPP!!!!!!!!!!!!!!
Answer:
B
Explanation:
The student is not able to move the box in D --> 55N, 0N. Since the net force is 0, it means that no force is being applied. So you will choose answer B from your options.
Hope this helps, thank you !!
QUICK!!!! please
Which of the following dilutions would produce 2.0M acid from 3.0M acid
A) 3.0mL acid and 2.0mL water
B) 2.0mL acid and 1.0mL water
C) 2.0mL acid and 3.0mL water
D) 1.0mL acid and 2.0mL water
Answer:
that's a difficult question
Explanation:
Sorry!!!!!
What does the MC1R gene code for
Answer:
The MC1R gene provides instructions for making a protein called the melanocortin 1 receptor. This receptor plays an important role in normal pigmentation. The receptor is primarily located on the surface of melanocytes, which are specialized cells that produce a pigment called melanin.
Explanation:
#hope this help
Hello can someone pls help me with this question! (Please explain why)
QUESTION: How is an increase in surface area achieved?
A. increasing the size of the reactant particles
B. decreasing the size of the reactant particles
Answer:
letter A.
Explanation:
the rate of a chemical reaction can be raised by increasing the surface area of a solid reactant. this is done by cutting the substance into small pieces, or by grinding it into a powder.if the surface area of a reactant is inceased: more particles are exposed to the other reactant.
HOPE IT HELPS(◍•ᴗ•◍)❤
Which of the following is an example of mutualism?
Answer:The relationship which is between bacteria and ungulates with the intestine is or good example of mutualism. Mutualism plays an important role in ecology. We can say that if we measure the exact fitness what we get as a benefit is a mutualistic relationship.example of a mutualistic relationship is that of the oxpecker (a kind of bird) and the rhinoceros or zebra. Oxpeckers land on rhinos or zebras and eat ticks and other parasites that live on their skin. The oxpeckers get food and the beasts get pest control.
Explanation:
hope this helps have a nice night❤️❤️❤️❤️
Explanation:
a human uses dog to protect a flock of sheep
How many moles of water are produced from the reaction of oxygen with four moles of propane (C3H8)? C3H8 + 5O2 --> 3CO2 + 4H2O
Answer:
Explanation:
The reaction is:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
We see, that the equation is ballanced.
As we have data from only one reactant, we assume the other is in excess.
Ratio is 1:4 (stoichiometry). We solve this, by a rule of three:
1 mol of propane can produce 4 moles of water
Then, 4 moles of propane, may produce
( 4 . 4 ) /1 = 16 moles of water can be made.
Remember, we always have to work with the limiting reactant.
16. Keesha performed a chemical reaction, and the products looked quite
different from the reactants. She knew the amount of matter had not
changed due to the law of conservation of mass. According to the law of
conservation of mass, what happens in a chemical reaction? *
Answer:
it's the third one
Explanation:
matter can't change, but mass can differ
When developing a product such as cookware specific heat well as health cost and ease of use our important factors to consider one of the materials tested which is the best suited for cookware and why explain based on safety/health cost specific heat and ease of use
Answer:
In short, the thermal conductivity of a material is how readily that material absorbs and transmits (releases) energy. When the fire or heating element of a range comes in contact to a pan, the energy from the heat source is transmitted to the pan. This increases the internal kinetic energy of the pan (commonly called "heating up"). The heated material then transmits the energy to nearby materials that are at a lower average molecular kinetic energy level (at a lower temperature than the material). The higher the thermal conductivity of the material, the faster it will heat up and also, the faster the heated area will spread to unheated areas of the same piece of material.
For example, if we placed a large sheet of stainless steel (fairly low thermal conductivity as cooking materials go) on a burner and turned on the burner, the area directly under the burner would get hot while the rest of the sheet slowly heats up. The burner imparts heat quickly only to the region of steel directly over it. The rest of the pan heats up from the conduction of the heat from that spot. When the outer edges of the sheet have reached a hot temperature, the spot directly over the burner would be extremely hot. The figure below shows an example of the temperature of the sheet of steel over a gas burner. The hottest parts are shown in white, hot is red and cool is blue.
Explanation:
No explanation hope i'm not wrong
how many grams of H2O are in 3.00 moles of H2O?
Answer:
mole=mass/molarmass
Explanation:
molar mass of h2o=18
This is an unbalanced equation representing a chemical reaction HgO->Hg+O2 (two is supposed to be small and on the bottom right part of the O) Which equation is the correctly balanced chemical equation for this reaction? A. HgO->Hg+20 (and a tiny 2 next to the 20) B. 2Hgo->Hg+0 (and a tiny 2 next to the 0) C. 2HgO->2Hg+0 (and a tiny 2 next to the 0) D. 2Hgo->Hg+20 (and a tiny 2 next to the 20)
Answer: C. [tex]2HgO\rightarrow 2Hg+O_2[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The skeletal chemical equation will be:
[tex]HgO\rightarrow Hg+O_2[/tex]
The balanced chemical equation will be:
[tex]2HgO\rightarrow 2Hg+O_2[/tex]
The correctly balanced chemical equation for the reaction [tex]HgO - > Hg + O_{2}[/tex] is: C. [tex]2HgO - > 2Hg + O_{2}[/tex]
The law of conservation of mass states that mass can neither be created nor destroyed; it can only be transferred from one location to another. As a result, the mass of the products is required to be the same as the mass of the reactants.
On both the reactant and product sides of the reaction, the identical amount of atoms of each element is required. Therefore, the equations used in chemistry are balanced.
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blance: Mg + HNO2 → Mg(NO2)2 + H2
Explanation:
Mg + 2HNO2 → Mg(NO2)2 + H2
Answer:
Mg + 2HNO2 → Mg(NO2)2 + H2
Explanation:
A screw decreases the amount of work done.
True
False
Answer:
tru
Explanation:
Which family group on the peirodic table has the most elements
a. metals
b. nonmetals
c. trainsiton elements
d. metalloids
Answer:
C. Transition metals
Explanation:
Out of the answers transition metals have the most elements on the periodic table.
Chemistry question on enthalpy HELP!!!!
Answer: The enthalpy change for this reaction is, -803 kJ
Explanation:
The balanced chemical reaction is,
[tex]CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)[/tex]
The expression for enthalpy change is,
[tex]\Delta H=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)][/tex]
[tex]\Delta H=[(n_{CO_2}\times \Delta H_{CO_2})+(n_{H_2O}\times \Delta H_{H_2O})]-[(n_{O_2}\times \Delta H_{O_2})+(n_{CH_4}\times \Delta H_{CH_4})][/tex]
where,
n = number of moles
Now put all the given values in this expression, we get
[tex]\Delta H=[(1\times -394)+(2\times -242]-[(2\times 0)+(1\times -75)][/tex]
[tex]\Delta H=-803kJ[/tex]
Therefore, the enthalpy change for combustion of methane is, -803 kJ
An effective treatment for some cancerous tumors involves irradiation with "fast" neutrons. The neutrons from one treatment source have an average velocity of 3.5×107 m/s. If the velocities of individual neutrons are known to within 2.0% of this value, what is the uncertainty in the position of one of them?
Answer:
4.54 * 10^-14 m
Explanation:
From Heisenberg's uncertainty principle, we can write;
Δp.Δx ≥ h/4π
Given that;
Δp =Δmv
So;
Δmv.Δx ≥h/4π
Δmv =2/100(3.5×10^7 m/s * 1.66 * 10^-27)
Δmv =1.162 * 10^-21 Kgms-1
Δx ≥6.63 * 10^-34 /4 * 3.142 * 1.162 * 10^-21
Δx ≥4.54 * 10^-14 m
How many moles are contained in 539.2 grams of Al(NO3)3
Answer; 2.531 moles
Explanation:
Question 13 (3 points)
.Which one of the following is not a scientific variable?
independent
statement
O control
dependent
The useful energy a light bulb gives out is
(a). kinetic energy (b) chemical energy (c) light energy
science subject
Answer:
Light bulb gives light energy which is usefull
Answer:
(c) light energy
Explanation:
As bulb is used for giving light and hence the energy that it gives is light energy.
what is the product for the synthesis reaction Na+O2
1-NaO
2-NaO2
3-Na2O
4-Na3O2
5-Na2O3
6-Na2O2
4 points
9. Name the scientists that played a major role in the development of cell theory. *
50 pts! Please help, much appreciated (:
2. Consider the table of boiling points and structural isomers. Note that butane has two possible isomers but that decane has 75 possible isomers. Why does the number of possible isomers go up with an increasing number of carbon atoms?
Answer:
because the number of constitutional confirmation , and geometric isomers goes up with each carbon atom added there are many more possible configurations and connectivities possible with decane , a 10 carbon chain , than with butane, a 4 carbon chain
"The number of possible isomers go up with an increasing number of carbon atoms because as the number of carbon atoms increases the tendency to form branching with other carbon atom increases as well."
What is isomer?
Isomers are molecules or polyatomic ions that have the same molecular formulas that is, the identical number of atoms of each element but different atomic configurations in space. Isomerism refers to the existence or potential of isomers. Isomers don't have to have the same chemical or physical properties.
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9.
Which element is most likely to conduct heat and electricity?
A. Na B. Ca C.P D. Ne
Answer:
A. Na
Explanation:
Sodium is a good conductor of electricity and heat because it has only one electron in its valence shell.
i hope this helps :)
Answer:
C.) P
Explanation:
I believe this is correct, lmk if it's not.