Answer:
the action or process of adapting or being adapted.
Answer: Adaptation is the physical or behavioral characteristic of an organism that helps an organism to survive better in the surrounding environment. Living things are adapted to the habitat they live in. This is because they have special features that help them to survive.
Explanation: Hope this helped :)
A student claims that signals transmitted by wireless computer networks are more beneficial than signals transmitted by other devices. Which statement supports the student’s claim?
im giving brainliest and 11 points
Answer: The wireless signals can carry large amounts of data at high radio frequencies.
Explanation: the others don’t specify the kind of signal
What are the 5 common uses of fossil fuels?
Answer:
Electricity. Coal alone provides half the electricity in the United States. ...
Heating. Oil and natural gas are commonly used for heating homes as well as providing heat for industrial applications.
Transportation. Oil supplies 99 percent of the energy for cars in the form of gasoline and diesel. ...
Limits. ...
Considerations.
Explanation:
A sample contains 0.1895 g of salt per 50 g of seawater. What is its salinity?
What is the term used for the elements and compounds after a chemical reaction takes place?
Answer: reactants.
Explanation:
To the right of the arrow we have the 'after' situation. This side represents the substances that we have after the reaction has taken place. They are called the products
What is the formula weight of zinc acetate, Zn(C2H3O2)2
Answer:
219.50
Explanation:
help help plz what is the difference between normal and transition elements
Answer:
hope it helps you
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Alcohol metabolism takes place in the
O small intestine
stomach
O
heart
Oliver
Find the % water in this hydrate:
ZnSO4 x 7H20
need help asap
Answer:
3 6 % mass is the correct answer
(pls mark me as the brainiest)
Which is an example of an interaction between the biosphere and the atmosphere?
melting
desalination
sedimentation
respiration
Write the iupac name of
Arabians Chemistry Fact
If 50 g of solute can be dissolved in 100 g of water, how many grams of solute can be dissolved in 300 g of water?
Answer:
150g
Explanation:
What is the mole fraction of oxygen in a gaseous mixture containing 25 grams of oxygen, 15 grams of nitrogen, and 10 grams of helium?
The statement, that describes the mole fraction of oxygen is "0.20."
What is mole fraction?The mole fraction, often known as the molar fraction, is defined in chemistry as the amount of a constituent, nᵢ, divided by the total amount of all constituents in a mixture, nₜₒₜ. It denotes the number of moles of a certain component in the solution divided by the total number of moles in the solution.
In order to calculate the mole fraction, initially the moles of the substance to be calculated from the given mass.
Gram to mole conversion,
[tex]=Grams\;*\;\frac{1\;mol}{grams} \\Moles of O2,25\;g\;*\;\frac{1\;mol}{32\;g}\;=\;0.78\;mol\;O2\\Moles of N215\;g\;*\;\frac{1\;mol}{28.02\;g}\;=\;0.54\;mol\;O2\\Moles of He10\;g\;*\;\frac{1\;mol}{4.0\;g}\;=\;2.5\;mol\;He[/tex]
Now, adding all the moles of gases0.78 + 0.54 + 2.5 = 3.82 moles.
Mole fraction of oxygen comes out to be,
[tex]Mole\; fraction\;=\frac{Amount \;of\;the\;substance}\\{Total\;moles} \\Mole\;fraction\;=\frac{0.78\;mol\;O2}{3.82 \;mol} =0.204.[/tex]
Hence the correct answer is 0.20.
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Observe this chemical reaction:
4 Fe + 302– 2Fe2O3
How many reactants are there ?
Answer:
2 Reactants
Explanation:
its the iron and oxygen
Does dissolved potassium chloride affect the surface tension between water molecules?
Answer:
Inorganic impurities present in the bulk of a liquid such as KCl tend to increase the surface tension of water.
Explanation:
As potassium chloride (KCl) dissolves in water, the ions are hydrated. ... When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them.
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24.50 g of Na react with H2O to make sodium hydroxide and H, gas. How much sodium
hydroxide is made if there is an excess of water?
Answer:
42.61 g of NaOH.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2Na + 2H₂O —> 2NaOH + H₂
Next, we shall determine the mass of Na that reacted and the mass of NaOH produced from the balanced equation. This is illustrated below:
Molar mass of Na = 23 g/mol
Mass of Na from the balanced equation = 2 × 23 = 46 g
Molar mass of NaOH = 23 + 16 + 1
= 40 g/mol
Mass of NaOH from the balanced equation = 2 × 40 = 80 g
SUMMARY:
From the balanced equation above,
46 g of Na reacted to produce 80 g of NaOH.
Finally, we shall determine the mass of NaOH produced by the reaction of 24.50 g of Na. This can be obtained as follow:
From the balanced equation above,
46 g of Na reacted to produce 80 g of NaOH.
Therefore, 24.50 g of Na will react to produce = (24.50 × 80)/46 = 42.61 g of NaOH.
Thus, 42.61 g of NaOH were obtained from the reaction.
What type of chemical bond holds 2Na+ and O2-together in
Na20?
a Metallic Bond
blonic Bond
C Molecular Bond
d Van der Waals' force
e Covalent Bond
Answer:
Covalent bond.
Explanation:
It involves sharing electrons equally between both molecules.
You need to prepare an acetate buffer of pH 5.47 from a 0.809 M acetic acid solution and a 2.20 M KOH solution. If you have 680 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 5.47 ? The pa of acetic acid is 4.76. Be sure to use appropriate significant figures.
Answer:
How do u post a picture as the question
Calculate the value of the equilibrium constant, c, for the reaction
Q(g)+X(g)=2M(g)+N(g)
given that
M(g)=Z(g) c1=3.97
6R(g)=2N(g)+4Z(g) c2=0.523
3X(g)+3Q(g)=9R(g) c3=11.8
Question is asking for c
2. Which of the following is most likely to to cause the extinction
of a species?
A. Mutation
B. A changing environment
C.natural selection
D. Genetic variation
Answer:
a change of environment
How many grams of carbon dioxide will be produced by the complete combustion of 30grams of ethane
Answer:
Write the balanced equation 2C2 H6 + 702 ==>4C02 + 6H2.... balanced equation ethane....oxygen....carbon dioxide...water
A paleontologist finds a fish fossil in a desert. What might the paleontologist learn from this?
Answer:
sometime back there might be a water body there
Answer:
Paleontologists can identify organisms that may be ancient relatives of those living today. By looking at fossils from the same layer of rocks, they can also suggest how these organisms lived together in their ancient habitat.
Also, he/she can find out that there was water there millions of year ago.
3.
Metals and nonmetals generally form ionic bonds
with each other. Which of the following sets of
elements will most likely form an ionic bond?
9
A. Na, F
B. CI, F C. Na, K D. He, O
Answer:
Na F
Explanation:
because electrovalent bond is present between them
what would refract the most? air, water, or glass?
convert 25.2 ml to dl
Answer:
0.252
Explanation:
type of environmental factors such as temperature or amount of light that might affect an organism's phenotype is___________
Write the dissociation reaction for each of the following
(If anyone can help me with 14 at most) please and thank you
Answer:
Cu2+ and ClO3 1-
Ga3+ and S-2
Pb4+ AsO3 3-
then balance them as you check my numbers to be sure they are right
Explanation:
Cu2+ and 2ClO3 1-
2Ga3+ and 3S-2
3Pb4+ 4AsO3 3-
What volume in L of a 0.724 M Nal solution contains 0.405 mol of Nal?
Answer:
0.559 L
Explanation:
Step 1: Given data
Moles of sodium iodide (n): 0.405 molMolar concentration of sodium iodide (M): 0.724 M (0.724 mol/L)Step 2: Calculate the volume of solution (V)
The molarity is equal to the moles of solute divided by the liters of solution.
M = n/V
V = n/M
V = 0.405 mol/(0.724 mol/L) = 0.559 L
The volume in Litres of a 0.724 M Nal solution that contains 0.405 mol of Nal is 0.56L.
HOW TO CALCULATE VOLUME:
The volume of a solution can be calculated by dividing the number of moles by the molarity as follows:Volume = no. of moles ÷ molarityAccording to this question, 0.724 M sodium iodide (NaI) solution contains 0.405 mol of Nal, the volume can be calculated as follows:Volume = 0.405mol ÷ 0.724MVolume = 0.56 LitresTherefore, the volume in Litres of a 0.724 M Nal solution that contains 0.405 mol of Nal is 0.56L.Learn more at: https://brainly.com/question/15626439?referrer=searchResults
Ean rule for [Fe(Co) 2(No)2]
Answer:
Correct option is
C
36, 36
EAN=Z−X+Y
EAN=effective atomic number
Z=atomic number
X=number of electrons lost by metal
Y=Number of electrons donated by ligands.
For [Fe(CO)
2
(NO
+
)
2
], EAN=26+2+8=36
For Co
2
(CO)
8
, EAN=27+0+9=36
How many moles of CCI are there in 78.2 g of CCI.?
0.508 moles
12.028 moles
1.55 x 10-4moles
153.8 moles
Answer:
0.508 mole
Explanation:
NOTE: Since no hydrogen is attached to the compound given in question above, it means the compound is CCl₄.
The number of mole present in 78.2 g of CCl₄ can be obtained as follow:
Mass of CCl₄ = 78.2 g
Molar mass of CCl₄ = 12 + (35.5×4)
= 12 + 142
= 154 g/mol
Mole of CCl₄ =?
Mole = mass / molar mass
Mole of CCl₄ = 78.2 / 154
Mole of CCl₄ = 0.508 mole
Therefore, 0.508 mole is present in 78.2 g of CCl₄
The law of conservation of mass is correctly demonstrated in which statement about cellular respiration
Answer:
The total mass of glucose and oxygen is equal to the total mass of carbon dioxide and water.
Explanation:
:)