Answer:
Option A:
Dig into the zone of aeration
Explanation:
Within the lithosphere of the earth's surface, the zone of aeration is the zone directly above the water table, with a lot of pore spaces within the rocks. These pore spaces contain air and water, which can be used to water the cows.
Once the zone of aeration has been dug into, the farmer can tap into the underground reserve of water, which is stored within the pores of rocks. This water can now sip into the hole that was dug up by the farmer, forming a pond for the cows.
225.0 mL of air is at 23.0°C. What is the volume at 90.0 °C?
Answer:
276 mL
Explanation:
Using Charles law equation as follows:
V1/T1 = V2/T2
Where;
V1 = initial volume (mL)
V2 = final volume (mL)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information provided in this question;
V1 = 225mL
V2 = ?
T1 = 23°C = 23 + 273 = 296K
T2 = 90°C = 90 + 273 = 363K
Using V1/T1 = V2/T2
225/296 = V2/363
Cross multiply
296 × V2 = 363 × 225
296V2 = 81675
V2 = 81675/296
V2 = 275.9
V2 = 276 mL
If Steve throws the football 50 meters in 5 seconds, what is the average speed of the football?
Answer:
10 meters per second
Explanation:
If I plant a green bean seed in the desert, will it grow thick, barrel-shaped stems full of water like a cactus? Why or why not?
Answer:
No, although the bean crop can grow perfectly in full sun or a little shade in very warm places. It does not mean that they will adopt the growth patterns of the cactus, especially because this plant needs constant watering (in small quantities), very constant. Beans require good drainage for their growth.
Each vegetation have its own characteristics and the power of adaptation. A green bean cannot survive in a desert like a cactus in desert without water. It can only grow thick in soil with proper water content and nutrients.
What is cactus?Cactus is a type of plant grow in dry regions such as deserts. It can adapt in deserts without water for long time because, the plant have enough water storage in its stem.
Domestic vegetation such as bean, pea, nuts etc ill not grow in dry regions because they cannot adapt in deserts without water. The soil in deserts is dry and have no nutrients.
These conditions prevent the growth of vegetables in desert areas. Moreover, desert have summer season only. The extreme temperature over there will cause the normal plants to diminish.
Therefore, planting green bean in deserts will not make it grow thick like a cactus plant.
To refer more about cactus, refer the link below:
https://brainly.com/question/16636755
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Question 1 of 10
Which of these is an advantage of wind energy?
A. It increases greenhouse gas emissions,
B. It generates noise pollution,
c. It generates electricity
0
D. It reduces bird and bat populations.
1: At which temperature would a reaction withΔH = -102 kJ/mol, ΔS = -0.188 kJ/(mol×K) be spontaneous? 2: At which temperature would a reaction withΔH = 132 kJ/mol, ΔS = 0.200 kJ/(mol×K) be spontaneous?
Answer:
1: At temperatures below 542.55 K
2: At temperatures above 660 K
Explanation:
Hello there!
In this case, according to the thermodynamic definition of the Gibbs free energy, it is possible to write the following expression:
[tex]\Delta G=\Delta H-T\Delta S[/tex]
Whereas ΔG=0 for the spontaneous transition. In such a way, we proceed as follows:
1:
[tex]0=\Delta H-T\Delta S\\\\T=\frac{-102kJ/mol}{-0.188kJ/mol-K} \\\\T=542.55K[/tex]
It means that at temperatures lower than 542.55 K the reaction will be spontaneous.
2:
[tex]0=\Delta H-T\Delta S\\\\T=\frac{132kJ/mol}{0.200kJ/mol-K} \\\\T=660K[/tex]
It means that at temperatures higher than 660 K the reaction will be spontaneous.
Best regards!
If you came upon an aqueous solution in the lab which reacted with a strip of magnesium , you could make the hypothesis that the compound in this solution is :
a . an acid
b . a base
C. a salt
Answer: A
Explanation: Bases Don't react with metals, acids do. Salt tend not to have that sort of reaction either.
Since dilute acids can react with metal strips, the solution must be an acid.
What is an acid?An acid is a substance that produces the hydrogen ions in solution. We should note that one of the properties of acids is that their dilute solutions are able to react with metals to evolve hydrogen gas.
As such, if the solution can react with a strip of magnessium then the solution must be an acid.
Learn kore about acids: https://brainly.com/question/365923
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Which two statements describe organ systems working together to remove
wastes from the body?
A. The integumentary system gives off thermal energy that comes
from blood vessels.
B. The digestive system breaks down food into molecules that can
move into the blood.
C. The circulatory system carries oxygen-rich blood into muscles in
the legs.
D. The respiratory system exhales carbon dioxide that enters the
lungs from blood vessels.
How many joules are required to melt 80 grams of ice to water at 0 C?
Explanation:
Its value is 6.02 kj/mol. This means for every mole of ice we melt we must apply 6.02 kj of heat. We can calculate the heat needed with the following equation:
q
=
n
×
Δ
H
where:
q
= heat
n
= moles
Δ
H
= enthalpy
In this problem we would like to calculate the heat needed to melt 35 grams of ice at 0 °C. This problem can be broken into three steps:
1. Calculate moles of water
2. multiply by the enthalpy of fusion
3. Convert kJ to J
Step 1: Calculating moles of water
35
g
×
(
1
m
o
l
18.02
g
)
=
1.94
m
o
l
s
Step 2: Multiply by enthalpy of fusion
q
=
n
×
Δ
H
=
1.94
×
6.02
=
11.678
k
J
Step 3: Convert kJ to J
11.678
k
J
×
(
1000
J
1
k
J
)
=
11
,
678
J
Finally rounding to 2 sig figs (since 34°C has two sig figs) we get
q
=
12
,
000
J
One last note, if the temperature were not 0 °C then the ice would have to be heated in addition to melted. This would be a phase change problem combined with a heat capacity problem.
The mass of the sun is about 1.98 x 10^30 kilograms. The mass of the earth is 5.97x 10^24 kilograms. The mass of the sun is how many times greater than the mass of
the earth?
Answer:
Explanation:
The mass of the sun is about 1.98 x 10^30 kilograms. The mass of the earth is 5.97x 10^24 kilograms.
1.98 x 10^30 / 5.97x 10^24 = 331658 times greater
Answer:
Explanation:
The mass of the sun / the mass of the earth
= 1.98 x 10^30 / 5.97x 10^24
= 3.32 x 10^5 times greater
The anion sbf4− does not obey the octet rule. draw its lewis structure and state the type of octet-rule exception. indicate the values of nonzero formal charges and include lone pair electrons.
Answer:
SEE EXPLANATION
Explanation:
The ion SbF4^- is octahedral in shape. In this compound, Sb which is the central atom in SbF4^- has an expanded octet. This means that it has more than eight electrons in its outermost shell thereby violating the octet rule. Hence the type of violation to the octet rule shown by the compound is expanded octet.
The Sb central atom has a formal charge of -1 as shown in the image attached to this answer.
1) For the equation in the picture, write down the molecular formula for each of the following species in the reaction:
a) Acid
b) Base
c) Conjugate Acid
d) Conjugate Base
2) In your own words, what is a Bronsted-Lowry Acid?
Answer:
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Which statement represents photosynthesis?
Answer:
brainliest plss
Explanation:
Photosynthesis is the process of converting light energy to chemical energy and storing it in the bonds of sugar. This process occurs in plants and some algae. Photosynthesis can be represented using a chemical equation.
Anyone do this worksheet? Answers?
Answer:
1. Moles of oxygen required to react with 5 moles of C₈H₁₈ = = 62.5 moles of oxygen
2. Mass of oxygen required = 2000 g of oxygen
3. Moles of CO₂ that will be produced = 40 moles of CO₂
4. Mass of CO₂ that will be produced = 1760 g of CO₂
5. Moles of H₂O that will be produced = 45 moles of H₂O
Explanation:
Balanced equation of the reaction : 2 C₈H₁₈ + 25 O₂ ---> 16 CO₂ + 18 H₂O
1. Mole ratio of Oxygen and C₈H₁₈ = 25 : 2
Moles of oxygen required to react with 5 moles of C₈H₁₈ = 5 × 25/2 moles
Moles of oxygen required to react with 5 moles of C₈H₁₈ = = 62.5 moles of oxygen
2. Mass of oxygen required = number of moles of oxygen × molar mass of oxygen
Molar mass of oxygen = 32.0 g/mol
Mass of oxygen required = 62.5 moles × 32.0 g/mol
Mass of oxygen required = 2000 g of oxygen
3. Mole ratio of CO₂ and C₈H₁₈ = 16 : 2
Moles of CO₂ that will be produced = 5 × 16/2 moles
Moles of CO₂ that will be produced = 40 moles of CO₂
4. Mass of CO₂ that will be produced = number of moles of CO₂ × molar mass of CO₂
Molar mass of CO₂ = 44.0 g/mol
Mass of CO₂ that will be produced = 40 moles × 44 g/mol
Mass of CO₂ that will be produced = 1760 g of CO₂
5. Mole ratio of H₂O and C₈H₁₈ = 18 : 2
Moles of H₂O that will be produced = 5 × 18/2 moles of H₂O
Moles of H₂O that will be produced = 45 moles of H₂O
Calculate the pH at the equivalence point for titrating 0.200 M solution of benzoic acid with 0.060 M NaOH. Ka for benzoic acid is 6.3 x10^-5
Answer:
[tex]pH=8.43[/tex]
Explanation:
Hello there!
In this case, since the reaction between benzoic acid and sodium hydroxide is carried out in a 1:1 mole ratio, it is possible to calculate the moles of sodium benzoate salt that are produced due to the neutralization as show below:
[tex]n_{salt}=0.2mol/L*1L=0.2mol[/tex]
We can assume that the volume of benzoic acid is 1 L and therefore the used volume of NaOH is:
[tex]V_{NaOH}=\frac{0.200M*1L}{0.060M}=3.33L[/tex]
Which means that the total final volume is 4.33 L and the concentration of the resulting basic salt is:
[tex][salt]=\frac{0.2mol}{4.33L}=0.046M[/tex]
Next, since the salt is C6H5COONa, we can see it is ionized in Na+ cations and C6H5COO- anions, but just the latter is able to react with the water in the solution in order to undergo the following reaction:
[tex]C_6H_5COO^-+H_2O\rightleftharpoons C_6H_5COOH+OH^-[/tex]
Whose equilibrium expression, it terms of Kb, due to the release of OH- ions, is:
[tex]Kb=\frac{[C6H5COOH][OH^-]}{[C6H5COO^-]}[/tex]
And can be written in terms of x, Kw and Ka:
[tex]\frac{Kw}{Ka} =\frac{x*x}{0.046M-x} \\\\\frac{1x10^{-14}}{6.3x10^{-5}}=1.59x10^{-10}= \frac{x^2}{0.046M-x}[/tex]
And because Kb<<<<<1 we can neglect the x on the bottom to get:
[tex]1.59x10^{-10}= \frac{x^2}{0.046M}[/tex]
Whereas x is computed as follows:
[tex]x=\sqrt{1.59x10^{-10}*{0.046M} =2.7x10^{-6}M[/tex]
Which is actually equal to the concentration of OH- ions so that we can calculate the pOH prior to the pH:
[tex]pOH=-log(2.7x10^{-6})=5.57[/tex]
And therefore the pH as shown below:
[tex]pH=14-5.57\\\\pH=8.43[/tex]
Which makes sense since this sodium benzoate is a basic salt.
Regards!
Floodplains extend from one side of the river valley to the other.
True or False
Answer:
true
Explanation:
hope this helps!
~mina-san
Answer:
Explanation: true
is visible light considered matter true or false
Answer:
Explanation:
false
When fluorine gas is put into contact with calcium metal at high temperatures, calcium fluoride powder is created in an exothermic reaction
Answer:
True,When fluorine gas is put into contact with calcium metal at high temperatures, calcium fluoride powder is created in an exothermic reaction.
A gas is heated from 263.0 K to 298.0 K and the volume is increased from 24.0 liters to 35.0 liters by moving a large piston within a cylinder. If the original pressure was 1.00 atm, what would the final pressure be?
Answer:
The final pressure is approximately 0.78 atm
Explanation:
The original temperature of the gas, T₁ = 263.0 K
The final temperature of the gas, T₂ = 298.0 K
The original volume of the gas, V₁ = 24.0 liters
The final volume of the gas, V₂ = 35.0 liters
The original pressure of the gas, P₁ = 1.00 atm
Let P₂ represent the final pressure, we get;
[tex]\dfrac{P_1 \cdot V_1}{T_1} = \dfrac{P_2 \cdot V_2}{T_2}[/tex]
[tex]P_2 = \dfrac{P_1 \cdot V_1 \cdot T_2}{T_1 \cdot V_2}[/tex]
[tex]P_2 = \dfrac{1 \times 24.0 \times 298}{263.0 \times 35.0} = 0.776969038566[/tex]
∴ The final pressure P₂ ≈ 0.78 atm.
Convert 338 L at 3.0 atm to its new volume at standard pressure. 1,014L
Answer:
1014 L
Explanation:
From the question,
Applying
PV = P'V'.................... Equation 1
Where P = initial pressure, P' = Final pressure, V = Initial volume, V' = Final volume
make V' the subject of the equation
V' = PV/P'........... Euqation 2
Given: P = 3 atm, V = 338L, P' = 1 atm (Standard pressure)
Substitute into equation 2
V' = (3×338)/1
V' = 1014 L
Hence the new volume is 1014 L
What should be the labels on the X-axis and Y-axis?
Answer Is Any Real Numbers, Such As 6,15,21.
State of Matter
Can someone help me ?
Answer:
HBrO forms hydrogen bonds with each other and with water
Acetic acid forms hydrogen bonds with each other and with water
Formaldehyde can't form hydrogen bonds to each other but do form hydrogen bonds with water.
Explanation:
The hypohalous acids are polar molecules hence they form intermolecular hydrogen bonds. They also form hydrogen bonds with water. This enables it to dissolve in water.
Acetic acid can form dimmers with each other due to hydrogen bond formation. Also, acetic acid is capable of forming hydrogen bonds with water. This enables acetic acid to dissolve in water.
Aldehydes do not form intermolecular hydrogen bonds with each other because there is no hydrogen atom attached directly to oxygen in aldehydes. As such, they can only form hydrogen bonds with water. This accounts for the water solubility of low molecular weight aldehydes. Hence, formaldehyde can't form hydrogen bonds to each other but do form hydrogen bonds with water.
answer truthfully:))
Answer:
Formula: [tex]Velocity \: V = f \lambda \\ Solution: = 5 \times 0.8 \\ = 4 \: {ms}^{ - 1} [/tex]
Answer:
The first guy is correct. That's what I got too
If you want 1,775 mL of 48 M MgCl2 solution, how many grams of MgCl2 do you need?
Round answer to 0.1 decimal
Answer:
0.1
Explanation:
Which of the chemicals in the following chemical reaction is the conjugate base?
CH3COOH + CH3NH2 --> CH3C00- + CH3NH3+
A.)CH3NH2
B.)CH3COO
C.)CH3COOH
D.)CH3NH3+
A) CH3NH2
This is because CH3NH2 recieved H from CH3COOH
1) How different is salt
reaction
from a chemical
Answer:
How different is salt
Explanation:
Salt, in chemistry, substance produced by the reaction of an acid with a base. The reaction between an acid and a base is called a neutralization reaction. The term salt is also used to refer specifically to common table salt, or sodium chloride.
Please answer quick!!
Which statement best explains how sexual reproduction increases variation within a species?
A. It causes the genes of two different individuals to mix.
B. It changes the base sequence of an organism's DNA.
C. It changes the trait that a given gene produces.
D. It copies one parent's genes to make each offspring.
Answer:
A
Explanation:
it causes the genes of two different individuals to mix
Answer:
Explanation:
A. It causes the genes of two different individuals to mix.
What is the total volume that you have if you calculated that it weighs 180g?
what may happen when two light waves traveling from oposite directoins meet?
Answer:
The meet
Explanation:
How many moles contain 9.75x10^20 molecules of carbonic acid?
Answer:
1 mole of carbonic acid=6.023×10^23 molecules
now
9.74×10^20molecules=
1/(6.023×10^23 molecules)×9.74×10^20molecules
=1.617×10^-3 mole
is your answer.