Answer:
1260 mL
Explanation:
Use formula (P1V1)/T1 = (P2V2)/T2
convert C to K
120 +273 = 393 K
20 + 273 = 293 K
plug numbers in
((1160)(1020))/ 393 = ((V2)(700))/ 293
solve for V2
V2 = 1260.187 mL
PLZ HELP ME!!!! I will give brainlist
1. When water evaporates, the water _____ energy. This is an example of an _____ reaction.
Select one:
a. releases, endothermic
b. absorbs, endothermic
c. absorbs, exothermic
2. Which of the following is an example of increasing entropy?
Select one:
a. a solution becomes more dilute
b. a solute crystallizes
c. total number of product molecules is less than the reactant molecules
Answer:
For 1, your answer is b. absorbs, endothermic. For 2, your answer is a. a solution becomes more dilute.
Explanation:
I took the test.
How does sunlight affect seasons?
Answer:
Seasons are caused by the Earth’s revolution around the Sun, as well as the tilt of the Earth on its axis. The hemisphere receiving the most direct sunlight experiences spring and summer, while the other experiences autumn and winter. During the warmer months, the Sun is higher in the sky, stays above the horizon for longer, and its rays are more direct.
PLZ HELP! QUESTION IS BELOW! :D
Answer:
Explanation:
When we say anything is a wave, what exactly do we mean? The most intuitive and straightforward wave to envision is a water wave. A motion, more specifically, is a disturbance that propagates or travels away from its source. Water waves are caused by a disruption in the water's surface, such as a rock tossed into a pond or a swimmer splashing the surface continuously. The noise for sound waves is a rise of air pressure, which may be caused by the oscillating cone within a speaker. There are many kinds of disturbances in earthquakes, including surface disturbances and pressure disturbances under the surface. Even radio signals are best deciphered by using a comparison of sea waves Water waves are helpful to visualize since they are more than just a mental picture. The amplitude, period, frequency, and energy of water waves are all the same as they are for all waves. A small set of underlying principles can be used to describe all wave characteristics.
(hope this helps can i plz have brainlist :D hehe)
The velocity of an object consists of its speed and..
A. Average speed
B. Distance
C. Displacement
D. Direction
Answer:
direction
Explanation:
If 20% of the nucleotides in a DNA molecule are adenine, what percentage of each of the other three bases would be found in this molecule and explain the answer
This is known as _______________________ rules
please i need help thank you
All of the following contribute to the evolution of a species EXCEPT -
O Respiration
O Adaptations
O Mutations
ONatural selection
Answer:
Respiration
Explanation:
Respiration is the system of how an animal breathes
Is my sister bad or good.
Answer:
decent
Explanation:
the temperature will decrease the rate of reactions.
Answer:
true?
Explanation:
How many oxygen molecules are in a flask that contains 1.43 grams of oxygen?
Answer:
0.08937835168818843
Explanation:
1 grams Oxygen is equal to 0.062502343837894 mole.
What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.200 mol of NaF to which 0.150 mol of HCl were added
Answer:
pH = 2.21
Explanation:
Hello there!
In this case, according to the reaction between NaF and HCl as the latter is added to the buffer:
[tex]NaF+HCl\rightarrow NaCl+HF[/tex]
It is possible for us to see how more HF is formed as HCl is added and therefore, the capacity of this HF/NaF-buffer is diminished as it turns acid. Therefore, it turns out feasible for us to calculate the consumed moles of NaF and the produced moles of HF due to the change in moles induced by HCl:
[tex]n_{HF}^{new}=0.300mol+0.150mol=0.450mol\\\\n_{NaF}^{new}=0.200mol-0.150mol=0.050mol[/tex]
Next, we calculate the resulting concentrations to further apply the Henderson-Hasselbach equation:
[tex][HF]=\frac{0.450mol}{1.0L} =0.450M[/tex]
[tex][NaF]=\frac{0.050mol}{1.0L} =0.050M[/tex]
Now, calculated the pKa of HF:
[tex]pKa=-log(6.8x10^{-4})=3.17[/tex]
We can proceed to the HH equation:
[tex]pH=pKa+log(\frac{[NaF]}{[HF]} )\\\\pH=3.17+log(\frac{0.05M}{0.45M} )\\\\pH=2.21[/tex]
Best regards!
pH is the measure of the hydrogen or hydronium ion concentration in an aqueous solution. The pH of the buffer made with HF and NaF is 2.21.
What is pH?pH is the measure of the acidic or the basic content in a solution that can be given by the hydrogen or the hydroxide concentration.
The reaction can be shown as,
[tex]\rm NaF + HCl \rightarrow NaCl + HF[/tex]
New moles of HF is 0.300 + 0.150 = 0.450 moles and new moles of NaF is 0.200 - 0.150 = 0.050 moles.
The concentration is calculated by the Henderson-Hasselbach equation:
[tex]\rm [HF] = \dfrac{0.450 \;\rm mol}{1.0 \;\rm L} = 0.450 \;\rm M[/tex]
And,
[tex]\rm [NaF] = \dfrac{0.050\;\rm mol}{1.0 \;\rm L} = 0.050\;\rm M[/tex]
pKa of hydrogen fluoride is calculated as:
[tex]\rm pKa = - log (6.8 \times 10^{-4}) = 3.17[/tex]
The pH from the pKa can be calculated as:
[tex]\begin{aligned}\rm pH &=\rm pKa + log (\dfrac{[NaF]}{[HF]})\\\\&= 3.17 + \rm log (\dfrac{0.05}{0.45})\\\\&= 2.21\end{aligned}[/tex]
Therefore, the pH is 2.21.
Learn more about pH here:
https://brainly.com/question/16405188
plssss show your work will mark the brainliest
Answer:
135.16 mL
Explanation:
From the question,
Applying,
PV/T = P'V'/T'.................... Equation 1
Where P = Initial pressure of the gas, V = Initial volume of the gas, T = Initial Temperature of the gas in Kelvin, P' = Final pressure of the gas, V' = Final Volume of the gas, T' = Final temperature of the gas in Kelvin.
Make V' the subject of the equation
V' = PVT'/TP'................... Equation 2
Given: P = 600 torr, V = 115 mL, T = 50 °C = (50+273) K = 323 K, T' = 75 °C = (75+273) K = 348 K, P' = 550 torr
Substitute these values into equation 2
V' = (600×115×348)/(323×550)
V' = 24012000/117650
V' = 135.16 mL
PLEASE ANSWER!!!!!!!! WILL MARK BRAILIEST
How many grams of 02 will be consumed?
23.36 g 02
11.68 g 02
In the above equation how many moles of NO can be made when 43 moles of HNO3 are consumed?
Answer:
rn4y8rg7348y0rp934nrf3
efjewhrf8h934hfr84398wgfyu8o
Explanation:
fe8u34h4n3urhu93q4pirnpqr34uwbry8439br8u3i2rpi34ofreuebue rf ef erf3rw wg
Which of the following elements has the largest atomic number?
O tellurium (Te)
lodine (0)
Otin (5)
O antimoney (5b)
Answer:
iodine is 53
tellurium is 52
antimony is 51
Otin Is 50
Explanation:
How many joules of heat are required to raise the temperature of 320.0 grams of water from 24.2°C to 50.8°C? Heat capacity of water is 4.2 J/g°C.
Answer:
35750.4 Joules
Explanation:
Using the formula as follows;
Q = m × c × ∆T
Where;
Q = amount of heat (joules)
m = mass of substance (g)
c = specific heat capacity (J/g°C)
∆T = change in temperature (°C)
According to the provided information,
mass (m) = 320.0 grams
c = 4.2 J/g°C
∆T = (50.8°C - 24.2°C) = 26.6°C
Q = ?
Using; Q = m × c × ∆T
Q = 320 × 4.2 × 26.6
Q = 35750.4 J
Determine the number of moles in 300 g S.
The number of moles present in 300 g of glucose is 1.7 moles or 2 moles approximately.
Explanation:
i did glucose cause i dont know what u meant by the S?
What is the volume, in liters, of 2.75 grams of fluorine gas at 35.0°C and 4.55 atm pressure?
The volume (in litres) of 2.75 g of fluorine gas at 35 °C and 4.55 atm is 0.402 L
How to determine the mole of fluorine gasMass of F₂ = 2.75 gMolar mass of F₂ = 2 × 19 = 38 g/mol Mole of F₂ =?
Mole = mass / molar mass
Mole of F₂ = 2.75 / 38
Mole of F₂ = 0.0724 mole
How to determine the volume Temperature (T) = 35 °C = 35 + 273 = 308 KPressure (P) = 4.55 atmGas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) = 0.0724 moleVolume (V) =?Using the ideal gas equation, the volume of the gas can be obtained as follow:
PV = nRT
Divide both side by P
V = nRT / P
V = ( 0.0724 × 0.0821 × 308) / 4.55
V = 0.402 L
Learn more about ideal gas equation:
https://brainly.com/question/4147359
Water circulates through Earth's water cycle by changing its _____.
A. state
B. acidity
C. turbidity
D. composition
PLsss I need answers T-T
In any engineering design problem, the first step is to understand the problem and identify one or more possible solutions. In this task, you’ll analyze the problems you face as the chemical engineer challenged with setting up the ammonia-making process. Recall the chemical equation for producing ammonia:
N2 + 3H2 ⇌ 2NH3 + energy
1.Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium.
Answer:
Explanation:
About 2,070 results (0.60 seconds)
Answer is: at lower temperatures the reaction rate would decrease. The lower is the temperature, the slower the reaction becomes. ... Because this is exothermic reaction (enthalpy is less than zero), at lower temperatures, the equilibrium is in favor of ammonia, but the reaction doesn't proceed at a detectable rate.
Hi,
let us go through the question again
N2 + 3H2 ⇌ 2NH3 + energy
Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium.
So I would approach this question on the basis of effect of each of the reactants and products concentration on the equilibrium synthesis of ammonia.
If the concentration of any reactant is increased, the yield of ammonia is increased.
If the concentration of ammonia is reduced by removing it as it forms, the yield will as well be increased.
This reaction also yields heat meaning it is an exothermic reaction, so when we increase the temperature, the yield will be reduced. Hence it is favored by low temperature.
whoever helps me will get brainlist
Answer:
Show us the arrows, how are we suppose to answer?
Explanation:
50 POINTS
Gizmos Moles Activity - chemistry
can someone please help me out
there is how I would answer it.
please help its due tonight!!! also no links allowed.
When 28,242 J are transferred to a water sample, it's temperature increases from 18⁰C to 63⁰C. Determine the mass of the water sample.
Answer:
149.79 grams.
Explanation:
Formula
Joules = m * c * delta (t)
Givens
J = 28242
m = ?
c = 4.19
Δt = 63 - 18 = 45
Solution
28242 = m * 4.19 * 45
28242 = m * 188.55
m = 28242 / 188.55
m = 149.79
What are these means in Periodic Table;
Group
Period
Block
When hydrogen and fluorine bond, the fluorine atom's electron configuration most resembles which element? A. nitrogen B. helium C. oxygen D. neon
Answer:
D. neon.
Explanation:
Hello there!
In this case, according to the following bonding:
[tex]H-F[/tex]
It is possible to bear to mind the fact that hydrogen has one valence electron whereas fluorine has seven. Moreover, once they bond, we understand fluorine takes the only hydrogen's valence electron to attain the electron configuration of the former's contiguous noble gas which is D. neon.
Best regards!
Question 16 of 33
Which sublevels contain valence electrons in an atom of nitrogen (N)?
The Periodic Table
A. 2s and 2p
B. 2s only
C. 3p only
O D. 2s and 3p
Drag and drop the labels provided into the boxes below to explain how the Earth-Sun-Moon system results in these seasons on Earth.
What is true about endothermic reactions?
Endothermic reactions release heat to the surroundings.
The enthalpy of products in endothermic reactions is lower than the enthalpy of reactants.
The enthalpy of an endothermic reaction is positive.
Endothermic reactions have an enthalpy of zero.
Answer:
The enthalpy of an endothermic reaction is positive, I believe.
''The enthalpy of an endothermic reaction is positive'' is the true statement about endothermic reaction
What is enthalpy of endothermic reaction?If a reaction absorbs more energy than releasing it, the reaction is considered as endothermic and enthalpy will be positive while on the other hand, if a reaction absorbs less energy and releasing more, the reaction is considered as exothermic and enthalpy will be negative.
So we can conclude that option C is the right answer.
Learn more about reaction here: https://brainly.com/question/26018275
Scientific notation of 0.00003
0.00003 in scientific notation would be 3 × 10⁻⁵.
The scientific notation of a number is represented as a coefficient multiplied by 10 raised to an appropriate exponent. 0.00003 can be expressed in scientific notation as [tex]3\times 10 ^{-5}[/tex].
Scientific notation is a simple and standardised approach to express extremely big or extremely small numbers. Its foundation is the idea that a number can be expressed as a coefficient times a power of 10. The exponent indicates how many places the decimal point must be moved to get the original value, while the coefficient is normally an integer between 1 and 10 (inclusive of 1 but exclusive of 10). To write 0.00003 in scientific notation, we need to move the decimal point five places to the right to make the coefficient between 1 and 10. 0.00003 can be expressed in scientific notation as [tex]3\times 10 ^{-5}[/tex].
To know more about scientific notation, here:
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Which of the following creates greenhouse gases during the generation of electricity?
Answer:
carbon dioxide makes up the variety of greenhouse gas emission from the sector but smaller amount of methane nitrous oxide are also emmited and all these gases are released during the combustion of fossil fuels, such as coal,oil and natural gas, to produce electricity
