Answers
Explanation:
Evolution is a biological process. It is how living things change over time and how new species develop.
Answer: It’s B
Explanation:
Related Questions
How do scientists organize dinosaur bones? By type and size. By size and location. By location and type.
Answers
Answer:
I'm pretty sure by type and size (I might be wrong).
whAT IS THE ELEMENTS FOR THE EQUATION OF DENSITY?
Answers
Answer:
Hello there! I believe the answer you need is d= M/V. Have a good day,night or miday. Sorry if I'm wrong.
i could really use some help with this question, thank you in advance!
Answers
Explanation Plato
Hydrochloric acid is a strong acid, and 100% of the acid molecules dissociate, forming H3O+ ions in aqueous solution. What does this information tell you about the relative dissociation of weaker acids?
Answers
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
According to above statement, HCl ( Hydrochloric acid ) is a strong acid, which when mixed in water dissociates complete in water to form H+ and Cl- ions that means 100% dissociation. but acids weaker than HCl shows relatively less dissociation.
That is less than 100% dissociation when mixed in water ~
This information tells us about the relative dissociation of weaker acids is that weaker acids dissociates less than 100%.
What is dissociation?Dissociation is defined as the breaking up of a compound into simpler constituents or components or parts. Ionic compounds dissociates in the water solution. Stronger acids have 100% ability to dissociate.
So we can conclude that this information tells us about the relative dissociation of weaker acids is that weaker acids dissociates less than 100%.
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a common chemicals used as a rising agent
is baking soda. it's chemical name is sodium
bicarbonate. it has a formula of NaHCO3.
what is the molar mass of sodium
bicarbonate?
Answers
When servers or sellers break state, county, or municipal alcohol laws when serving or selling alcohol, the server or seller
o is not llable; the establishment's owner will de held criminally liable.
o may be fined, but cannot face criminal charges.
will not be fined, but the establishment could lose its liquor license
Answers
When servers break state, county, or municipal alcohol laws when serving alcohol, the server could be fined and the establishment could lose its liquor license.
What is Liquor license?This is defined as governmentally issued permit for the service of alcohol in an area over a period of time.
When alcohol law is broken, there may be a fine or the revoking of the liquor license.
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when chlorine is added to acetylene tetrachloroethane is formed How many grams of tetrachloroethane are ade if 15 liters of chlorine is used with excess C2H2
Answers
35.5 g of tetrachloroethane is added if 15 grams of chlorine is used with excess [tex]C_2H_2[/tex].
What is a balanced chemical equation?A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.
Balanced chemical equation:
[tex]2Cl_2 (g) + C_2H_2 (g)[/tex] → [tex]C_2H_2Cl_4(l)[/tex]
In your case, 2 moles of chlorine gas are needed to produce 1 mole of tetrachloroethane, which implies that there's a 2:1 mole ratio between the two.
Calculating the mass of tetrachloroethane.
[tex]m[/tex][tex]C_2H_2Cl_4(l)[/tex] = [tex]15 g[/tex] [tex]Cl_2 (g)[/tex] X [tex]\frac{2 mol \;of \;Cl_2}{70 g \;Cl_2}[/tex] X [tex]\frac{1 mol \;of \;C_2H_2Cl_4(l)}{2 mol \;Cl_2}[/tex] X [tex]\frac{167.8 g \;C_2H_2Cl_4(l))}{1 mol \;C_2H_2Cl_4}[/tex]
[tex]C_2H_2Cl_4(l)[/tex] = [tex]17.75 g[/tex]
[tex]C_2H_2Cl_4(l)[/tex] = [tex]35.5 g[/tex]
Hence, 35.5 g of tetrachloroethane is added if 15 gram of chlorine is used with excess [tex]C_2H_2[/tex]
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If you could travel to any TIME PERIOD, when would go and why.
Answers
Answer:
I Would Go Back To When There Were Cavemen Because I Would Love To See How Things Went On And How Women/Men Handled Themselves
Explanation:
Why Would I Travel To When Cavemen Were Here?
Because I Have A Fuji Film And I Would Love To Come Back To This Day And Show Everyone That Cavemen/Dinosoars ARE Real
how many liters is 3.0 g of o2 gas
Answers
1 mole of any gas at standard temperature and pressure (273 K and 1 atm) occupies a volume of 22.4 L.
gases are a unique state of matter because the volume of a gas can be compressed or expanded based on the pressure applied. robert boyle studied the changes in the volume of a gas as the pressure changes with a barometer. he found that the pressure is inversely proportional to volume when the mass and temperature remain constant. which equation represents the pressure-volume relationship of boyle's law?
Answers
Boyle's law gave the relation between the pressure and the volume of the gas. The equation can be represented as PV = constant (T and n are constant).
What is Boyle's law?Boyle's law gave the inverse relationship between the pressure and the volume of the hypothetical ideal gas when the moles and the temperature are constant. It can be shown as PV = constant.
The volume of the gas can be compressed by increasing the pressure, and the volume of the gas can be expanded by decreasing the pressure of the gas.
Therefore, Boyle's law gave the PV = constant.
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Acids increase the concentration of what in water?.
Answers
Answer:
Hydronium (H3O+) ions
Explanation:
Acids increase the concentration of hydronium ions in water and thus lower the pH (make it more acidic)
Answer:
The answer for this question is Hydrogen Ions
Why might chromatin be tangled in the nucleus?
Answers
It takes 83 ml of a 0. 45 m naoh solution to neutralize 235 ml of an hcl solution. what is the concentration of the hcl solution?.
Answers
Answer:Expert-verified answer
n(NaOH) = 0.037 moles of NaOH. HOPE THIS HELPS!!Apr 20, 2020
Explanation:
The conjugate base of a strong acid will always . . .
be acidic
be basic
be a spectator
Answers
Blank measurements are useful for determining buoyancy and identifying relationships between substances.
A. Weight
B. Meniscus
C. Density
Answers
How much energy is released if a sample loses 0.001 kg mass through radioactive decay?
Answers
Explanation:
because the energy it can't be calculated
Identify the correct type of heat transfer for A, B, and C in the picture. Using the picture, cite evidence for your choices.
Answers
The correct type of heat transfer for A, B, and C are conduction, convection and radiation respectively.
What is heat transfer?Heat transfer is a process in which amount of heat will be transferred from one object to any other object by various means.
In type A, heat is transferred through conduction process as in this transfer takes place due to direct contact of particles.In type B, heat is transferred through the convection process as in that process transfer of heat takes place through the medium.In type C, heat transfer done by the radiation as in that transfer through empty space.Hence at A, B and C heat transfer done through conduction, convection and radiation respectively.
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Answer:
heat transfer for A, B, and C are conduction, convection and radiation respectively.
hope you like it
Which type of nucleus decays during a radioactive decay?
a. radioactive
b. light
c. regular
d. heavy
Answers
Radioactive decay of a nucleus is common in nuclei that are heavy
What is a radioactive nucleus?A radioactive nucleus is a nucleus that decays by spontaneous disintegration. It is common in Many nuclei that have atomic number above 82.
Hence, radioactive decay of a nucleus is common in nuclei that are heavy and are capable of breaking apart.
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You need to draw up oral syringes with 12.5 mg of diphenhydramine. The oral solution is available as 25 mg/10 mL. How many oral syringes can be filled from 4 ounces of solution
Answers
Answer:
24 oral syringes
Explanation:
A student is studying a sample of neon in a container with a moveable piston (this means the container can change in size). If the sample in the container is initially at a pressure of 768.6 torr when the container has a volume of 93.2 mL, what is the pressure of the gas when the piston is moved so that the volume of the container becomes 140.2 mL?
Answers
Answer:
P2=672.1 torr
Explanation:
use the formula P1V1=P2V2, plug in the numbers so your equation should look like this (763.9)x(98.8)=P2(112.3) answer should be P2=672.1 torr
The resultant pressure of the sample of gas is 510.9 torr.
What is the relation between pressure and volume?Relation between the pressure and volume will be represented by the ideal gas equation PV = nRT, and for the given question required equation is:
P₁V₁ = P₂V₂, where
P₁ & V₁ are the pressure and volume of initial sample.
P₂ & V₂ are the pressure and volume of final sample.
On putting values from the question to the equation, we get
P₂ = (768.6)(93.2) / (140.2) = 510.9 torr
Hence resultant pressure is 510.9 torr.
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A helium balloon with an internal pressure of 1.00 atm and a volume of 4.50 L at 20.0˚C is released. What volume will the balloon occupy at an altitude where the pressure is 0.600 atm and the temperature is –20.0˚C?
GAS LAW:
Given:
Unknown:
Formula:
Solution:
FInal Answer: V2 =
Answers
The Gas law is COMBINED GAS LAW
GIVEN :
P1=1.00 atmp
V1=3.50 lit
T1 = 20.0°C = 293K
P2=0.600 atmp
T2=-20.0°C=253K
Now,
Formula =>
P1V1/T1 =P2V2/T2
=> V2 = (P1/P2)(T2/T1)(V1)
=> V2 = (1.00/0.60)(253/293)(3.50)
=>V2 = 5.01403 L
=> V2 = 5L (approx).
what is 750 grams of phosphorus
Answers
The moles of phosphorous which are present in 750 grams of phosphorous is 24.27 moles.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be represented as:
n = W/M, whereW = given massM = molar massMoles of phosphorous which are present in 750 grams will be calculated as:
n = 750g / 30.9g/mol = 24.27 moles
Hence the resultant moles of phosphorous is 24.27 moles.
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How many moles of H2O are in 35 grams of H2O?
Answers
Answer:
1.94 Moles H2O
Explanation:
1 grams Water to mol = 0.05551 mol
so 35 x 0.05551 = 1.9427952271627198, which rounds to 1.94 moles
27. Write balanced equations that describe the following reactions.
a. the dissociation of perchloric acid in water
b. the dissociation of propanoic acid (CH3CH2CO2H) in
water
c. the dissociation of ammonium ion in water
Answers
#a
HClO_4(aq)+H2O(l)—»H3O+(aq)+ClO_4#b
CH3CH2COOH + H2O ==> CH3COO^- +H3O#c
This is reversible reaction
H2O + NH_3 ⇄ OH^- + NH4^+Calcium is an element with several naturally-occurring isotopes.
(i) What is the meaning of the term element ?
Answers
Answer:
Element are substances made up of the same kind of atoms
Ne double-replacement reaction of iron(ii) nitrate with potassium
ydroxide produces a precipitate of iron(iii) hydroxide.
fe(no3)3(aq) +3koh(aq) +3kno3(aq) + fe(oh)3(s)
that mass of iron(iii) hydroxide is produced when 50.0 g iron(iii)
itrate reacts with excess potassium hydroxide?
a 7.36 g fe(oh)3
w
b 22.1 g fe(oh)3
g
3
c 66.3 g fe(oh)3
d 50.0 g fe(oh)3
check it
skip
Answers
The mass of iron (III) oxide that will be produced would be 22.1 grams
Stoichiometric calculationFrom the equation of the reaction:
[tex]3KOH + Fe(NO_3)_3 --- > 3KNO_3 + Fe(OH)_3[/tex]
The mole ratio of iron (III) nitrate to iron (III) hydroxide is 1:1.
Mole of 50 g iron (III) nitrate = 50/241.86 = 0.207 moles
Equivalent mole of iron (III) hydroxide = 0.207 moles
Mass of 0.207 moles iron (III) hydroxide = 0.207 x 106.87 = 22.1 grams
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The radioactive decay of Uranium-238 releases alphas particles and results in a mass change of 0.135 g. Determine the amount of energy released by this reaction
a) 1.22 x 10^13J
b) 1.22 x 10^16J
c) 4.05 x 10^4J
d) 4.05 x 10^7J
Answers
This question involves the concept of binding energy.
The amount of energy released by this reaction is "a) 1.22 x 10¹³ m/s".
What amount of energy is released?The amount of energy that is released during the radioactive decay of any element is known as binding energy. This can be given by using the following formula:
[tex]E=\Delta mc^2[/tex]
where,
E = energy released = ?Δm = mass change = 0.135 g = 1.35 x 10⁻⁴ kgc = speed of light = 3 x 10⁸ m/sTherefore,
E = (1.35 x 10⁻⁴ kg)(3 x 10⁸ m/s)²
E = 1.22 x 10¹³ m/s
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One mole of which substance contains a total of 6.02 x 1023 atoms? (I need help please.)
Li
NH3
CO2
02
Answers
Answer:
Oxygen
Explanation:
One mole of atoms of oxygen has a mass of 16 g, as 16 is the atomic weight of oxygen, and contains 6.02 X 1023 atoms of oxygen.
Why do ice cubes float to the top of a glass of water.
Answers
Answer:
Since the water is heavier, it displaces the lighter ice,
Explanation:
hope that helps
Which part of the cell was most directly responsible for the shrunken appearance of the cell?
Answers
If a cell is placed in a hypertonic solution, water will leave the cell, and the cell will shrink.
What is osmosis ?
Osmosis is the net movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.
This may sound odd at first, since we usually talk about the diffusion of solutes that are dissolved in water, not about the movement of water itself.
If a cell is placed in a hypertonic solution, water will leave the cell, and the cell will shrink.
In an isotonic environment, there is no net water movement, so there is no change in the size of the cell.
When a cell is placed in a hypotonic environment, water will enter the cell, and the cell will swell.
Therefore If a cell is placed in a hypertonic solution, water will leave the cell, and the cell will shrink.
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