Answer:
See Explanation
Explanation:
Evaporation is an endothermic process, an endothermic process is one in which energy is absorbed from the surrounding thereby making the system to be at a lower temperature compared to the environment.
Being an exothermic process, molecules take away energy from the liquid surface as they escape from the liquid surface hence, evaporation causes the temperature of the water to be decreased below room temperature.
The rate of evaporation and cooling depends on the surface area of liquid. The liquid in the wide and shallow container has a greater rate of cooling because it has a greater surface area than the liquid in the narrow and deep container.
I WILL MARK BRAINLY WHOLE SLIDE
Need help on this question asap please please I’m going to really appreciate it
Answer:
0.11 moles
Explanation:
The equation of the reaction is;
2SO2 + O2 ------>2SO3
Number of moles of O2 in 3.42 g = 3.42g/32 g/mol = 0.11 moles
Hence, 0.11 moles of O2 is consumed when 3.42 g of O2 reacts with SO2 to form SO3.
Which is NOT a way to accelerate an object? *
What set of coefficients will balance the chemical equation: _NaBr (aq) + _H3PO4 (aq) → _Na3PO4(aq) + _HBr (aq)
A. 3,1,1,3
B. 1,2,3,1
C. 3,1,3,1
D. 1,1,3,3
The Balanced chemical equation for above reaction will be :
[tex] \small{ \mathrm{3NaBr + H_3PO_4 \rightarrow Na_3PO_4 + 3HBr}}[/tex]
The Coefficients will be :
[tex]NaBr - 3[/tex][tex]H_3PO_4 - 1[/tex][tex]Na_3PO_4 - 1[/tex][tex]HBr - 3 [/tex]So, Correct option is :
A. 3, 1, 1, 3
_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
URGENT!!!
Which statement explains why an increase in molality increases the boiling point of a solution? The addition of solute decreases the solvent’s vapor pressure. A higher temperature must then be applied to overcome the change. The addition of solute increases the solvent’s vapor pressure. A higher temperature must then be applied to overcome the change. The addition of solute increases the solvent’s ability to boil. The solute’s molecules repel the solvent’s molecules, giving them higher binding energy and hence the need for higher temperature.
Answer:
the addition to solute decreases the solvent's vapor pressure. a temperature must then be applied to overcome the change
Explanation:
Answer:
long story short: A
Explanation:
Structures and Forces - What is force and external forces.
Question 1) Jacob and Ravleen are moving furniture. They need to move the filing cabinet over 6 feet and it is very heavy. Jacob wants to apply force and push it by putting his hands on point A because he thinks it would be easier to move it from the top as there is less weight on the top. Ravleen says it's better to push at point B because the center of gravity is lower. Which person is correct and EXPLAIN why and what may happen if it is pushed in the wrong spot.
Answer:
The restoring force that prevents the furniture from tipping over when pushing the furniture towards the right, F= W × D
Where;
W = The weight of the furniture
D = The horizontal distance from the center of gravity of the furniture, CG and the to the lower right corner of the furniture
Given that A > D, for the furniture to tip over when pushing above the CG, we have;
F1 × A ≤ W × D
∴ F1 << W or for a force much smaller than W, the weight of the furniture applied above the center of gravity, the furniture will tip over
However when the force F2 is applied, where C < D, we have for no tipping over;
F2 × C ≤ W × D, therefore, given that C < D, when a force much higher than the weight, W, is applied at F2, the furniture will remain upright
Therefore, it is better push at a point lower than or equal to the center of gravity, whereby the point B is lower than the center of gravity, it is better to push at point B, Ravleen is correct and it is better to push at point B because the center of gravity is lower
If the furniture is pushed at the wrong spot it may tip over
Please see attached drawing
Explanation:
Mendel crossed tall pea plants with short pea plants. the offspring were all tall plants.
1. Which allele is recessive?
2. Which allele is dominant?

please hurry

Answer:
1. Allele for shortness (t)
2. Allele for tallness (T)
Explanation:
Gregor Mendel performed numerous experiments using pea plants (Pisium sativum). He tested the height traits of pea plants by crossing tall pea plants (TT) and short pea plants (tt) to obtain offsprings that were all tall (Tt) in the first filial generation (F1).
This is possible because the allele for tallness is DOMINANT while the allele for shortness is RECESSIVE. This means that tallness allele (T) will mask the phenotypic expression of shortness allele (t) when in an heterozygous state (Tt) as in the F1 generation.
The pressure of 25.0 L is increased from 11.0 kPa to 16.0 kPa. What is the new pressure
Answer:
Explanation:
2C2H2 + 5O2 → 4CO2 + 2H2O
Which of the following statements would be correct if one mole of C2H2 was used in this reaction? (5 points)
a
One mole of oxygen was used in this reaction.
b
Five moles of oxygen were used in this reaction.
c
Four moles of carbon dioxide were produced from this reaction.
d
Two moles of carbon dioxide were produced from this reaction.
Answer:
d. Two moles of carbon dioxide were produced from this reaction
Explanation:
The given chemical reaction can be written as follows;
2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O
From the above chemical reaction, we have;
Two moles of C₂H₂ reacts with five moles of O₂ to produce four moles of CO₂ and two moles of H₂O
We have;
One mole of C₂H₂ will react with two and half moles of O₂ to produce two moles of CO₂ and one mole of H₂O
Therefore, in the above reaction, when one mole of C₂H₂ is used, two moles of CO₂ will be produced.
Agustina was standing on the edge of a cliff of unknown height holding a bowling ball. She wanted to find the height of the cliff. She worked with Maite to time the how long the bowling took to fall to the bottom of the cliff. Maite timed the drop at 9.4 seconds on each of their 10 trials. The bowling ball started at rest on each of the trials. What distance did the bowling ball fall in each trial?
Answer:
433 m
Explanation:
Since the fall represents motion under gravity, we use the equation
s = ut - 1/2gt² where s = height of cliff or distance bowling ball falls through, u = initial velocity of bowling ball = 0 m/s(since it starts from rest), t = time = 9.4 s and g = acceleration due to gravity = -9.8 m/s².
So, substituting the values of the variables into the equation, we have
s = 0 m/s × 9.4 s - 1/2 × 9.8 m/s² × (9.4 s)²
s = 0 m - 1/2 × -9.8 m/s² × 88.36 s²
s = 1/2(865.928 m)
s = 432.964
s ≅ 433 m
Answer question in picture
(D)
Explanation:
On the left side two molecules, each made of 2 grays and 3 blues, which suggests that only (D) offers the right combination: 2 Al atoms and 3 O atoms that make up Al2O3.
What is the mole fraction of ethanol (C2H5OH) in a solution of 47.5 g of ethanol in 850 g of water?
Answer:
0.021
Explanation:
that's the answer because I just did an exam that included this question and then the miss explained to me why this was the answer, but don't worry am 100% sure the answer is 0.021 .
The mole fraction of ethanol in a solution of 47.5 g of ethanol in 850 g of water is 0.021.
How we calculate the mole fraction?Mole fraction of any substance present in solution will be calculted by dividing the moles of sample to the total moles of solution.
Moles will be calculated as:
n = W/M , where
W = given mass
M = molar mass
Moles of ethanol will be calculated as:
n = 47.5g / 46.07g/mol = 1.03 moles
Moles of water will be calculated as:
850g / 18g/mol = 47.18 moles
Total moles of solution = 1.03 + 47.18 = 48.21 moles
Mole fraction of ethanol in water will be calculated as:
mole fraction = 1.03 / 48.21 = 0.021
Hence, mole fraction is 0.021.
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A fertilized egg, or a
, is formed from the fusion of egg and sperm.
Somebody please help this is due in 30 minutes! (picture is attached)
44.5 g Al2(SO4)3
Explanation:
# moles Ba(NO3)2 = (0.543M)(0.717 L)
= 0.389 mol Ba(NO3)2
Now we use the molar ratios,
0.389 mol Ba(NO3)2 ×(1 mol Al2(SO4)3/3 mol Ba(NO3)2)
= 0.130 mol Al2(SO4)3
0.130 mol Al2(SO4)3 × (342.15 g Al2(SO4)3/(1 mol Al2(SO4)3)
= 44.5 g Al2(SO4)3
I can't seem to figure out how to set up charts so there's just a screenshot of the question in the file attached :) Thank's for any help!!
Answer:
See Explanation
Explanation:
Volume of base used = (31.79 - 1.6) + (32.12 - 0.98) + (42.87 -13.21)/3 = 30.34 cm3
Volume of acid used = (24.86 - 0.42) + (24.11 - 0.11) + (27.67 -3.42)/3 = 24.23 cm3
For trial 1= number of moles of HBr = 24.44/1000 * 0.3 = 0.0073 moles
For trial 2= number of moles of HBr = 24/1000 * 0.3 = 0.0072 moles
For trial 3= number of moles of HBr = 0.0089 moles
HBr(aq) + KOH(aq) -----> KBr(aq) + H2O(l)
One mole of base is required to neutralize one mole of acid.
From CAVA/CBVB =nA/nB
CAVAnB = CBVBnA
CB = CAVAnB/VBnA
CB = 0.3 * 24.23 * 1/30.34 * 1
CB = 0.24 moldm-3
number of moles of KOH = concentration * volume
number of moles = mass/molar mass
molar mass of KOH = 56 g/mol
mass/56 = 0.24 * 30.34/1000
mass = 0.24 * 30.34/1000 * 56
mass =0.408 g of KOH
Calculate the molarity of a solution that contains 0.75 moles of lithium fluoride, LiF, in a 65 mL solution.
The molarity (M) of a solution is 11.5 M that contains 0.75 moles of lithium fluoride, LiF in a 65 ml of solution.
What is Molarity ?Molarity (M) is defined as the number of moles of solute dissolved in 1L of solution. Molarity is also known as Molar concentration. The S.I Unit of Molarity is molar (M) or mol/L.
How to find molarity of a solution ?Molarity (M) = [tex]\frac{\text{Number of moles of solute}}{\text{Volume of solution (in liters)}}[/tex]
From the above definition it is clear that the volume of solution is in liter. In question the volume of solution is given in ml.
So, convert 65 ml into l.
65 ml = [tex]\frac{65}{1000}[/tex] = 0.065 l
Now, put the values in above formula, we get that
(M) = [tex]\frac{0.75}{0.065}[/tex] = 11.5 M
Thus, the molarity of a solution is 11.5 M that contains 0.75 moles of lithium fluoride, LiF in a 65 ml of solution.
Learn more about Molarity here: https://brainly.com/question/14469428
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What is the difference in a transverse and a longitudinal wave?
Group of answer choices
Transverse waves are bigger than longitudinal waves
A transverse wave has crests and troughs and a longitudinal has compressions and rarefactions.
Transverse waves are sound waves and longitudinal waves are light waves.
Answer:
A transverse wave has crests and troughs and a longitudinal has compressions and rarefactions.
To calculate the percentage of people who have a particular allele population studies are conducted to collect data.true or false
How many degrees would the temperature of a 45.0 g piece of iron increase if 7,680 J of energy are applied to it? (The specific heat of iron is 0.449 J/g°C)
Question 10 options:
76.6°C
155,000°C
380°C
0.0130°C
Answer:
380
Explanation:
Q=mco
Q is the energy
M is mass
C is specific heat
O is increased in temperature
If you want to eat foods that contain less additives, what could you do?
A.
Stay away from packaged foods.
B.
Stay away from fresh fruits and vegetables.
Answer: the answer is a
Explanation:
always eat fresh fruits and veggiies.
At 289 K, a sample of gas has a volume of 42.0 cm3. What volume does the gas occupy at 342 K? (12.5 Points)
Answer: [tex]49.7\ cm^3[/tex]
Explanation:
Given
At temperature [tex]T_1=289\ K[/tex]
Volume is [tex]V_1=42\ cm^3[/tex]
and the temperature changes to [tex]T_2=342\ K[/tex]
At this temperature volume is [tex]V_2[/tex]
Consider Pressure remains the constant
[tex]\therefore \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\\Rightarrow V_2=V_1\times \dfrac{T_2}{T_1}\\\\\text{Insert values}\\\\\Rightarrow V_2=42\times \dfrac{342}{289}\\\\\Rightarrow V_2=49.7\ cm^3[/tex]
The volume at this temperature is [tex]49.7\ cm^3[/tex]
Anyone know this question
Answer:
12
my advice is split the equation into 2 and write on each side how many atoms of each element are there and it will be easier to balance.
Which is the correct chemical formula for Pentacarbon Tetraphosphide
Answer:
C5P4
Explanation:
the answer is C5P4 because penta is 5 and tetra is 4
If 10ml of 1.00M HCI(aq) neutralized 30 ml of an NaOH solution. What was the molarity of the Na OH solution?
Explanation:
plz mark as brainlist///////
Cuál es la Masa en Gramos de 3,5 moles de H2O?
Na+ and P-3 whats the formula and whats the name of it
Answer:
sodium phosphide!!!!!!!!!!!!!!!
What is the difference between Mitosis and Meiosis?
Write a balanced equation out of these chemicals
Answer:
2Na + 2H20--> 2NaOH+H2
............. this is the ans
Determine the pressure inside a television picture tube with a volume of 3.50 L that contains
2.00 X 10^-5 g of nitrogen gas at 22°C.
The pressure inside the television tube containing 2×10¯⁵ g of N₂ at 22 °C is 4.94×10¯⁶ atm
How to determine the mole of fluorine gasMass of N₂ = 2×10¯⁵ gMolar mass of N₂ = 2 × 14 = 28 g/mol Mole of N₂ =?Mole = mass / molar mass
Mole of N₂ = 2×10¯⁵ / 28
Mole of N₂ = 7.14×10¯⁷ mole
How to determine the pressure Volume (V) = 3.5 LTemperature (T) = 22 °C = 22 + 273 = 295 KGas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) = 7.14×10¯⁷ molePressure (P) = ?The pressure inside the television tube can be obtained by using the ideal gas equation as follow:
PV = nRT
Divide both side by V
P = nRT / V
P = (7.14×10¯⁷ × 0.0821 × 295) / 3.5
P = 4.94×10¯⁶ atm
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What is the radius of this circle if the circumference is 18 pi cm?
Answer: 2.86 inches
Explanation: To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.
Answer:
2.86 inches
Explanation: