What is the relative humidity if the dry-bulb temperature is 8˚C and the difference between the wet and dry-bulb temperatures is 6˚C ?
Answer:
39%
Explanation:
The Dry Bulb Temperature (also known as air temperature) is the ambient air temperature.
The Wet Bulb temperature is the temperature of adiabatic saturation.
The relative humidity is the amount of water vapor in the air. The relative humidity can be gotten from the dry bulb and wet bulb temperature. The difference between the wet bulb and dry bulb temperature as well as the dry bulb temperature is used to determine the relative humidity with the help of a Psychrometric Chart
Given that the dry-bulb temperature is 8˚C and the difference between the wet and dry-bulb temperatures is 6˚C. From the chart:
Relative humidity = 39%
Answer:
39% I believe is correct.
2. If a gas at 500 mL has a temperature of 45°C, then what is the new volume when the temperature is increased to 65°C? Show your work.
Answer:
V2= 531.4 ml
Explanation:
T1= 273+45 °C= 318 Kelvin
T2= 273+65 °C= 338 Kelvin
V1= 500ml *( 0.001L/1ml)= 0.5 Liters
V2= [tex]\frac{V1 * T2}{T1}[/tex]= [tex]\frac{0.5 L * 338K}{318K}[/tex] = 0.5314465409 Liters* (1 ml/0.001 L)= 531.4 ml
The half- life of actinium-228 is 6.13 hours What amount of a 70 milliqram sample remains after 24.52 hours?
Answer:
4.375 milligram
Explanation:
Applying,
A = A'(2ᵃ/ⁿ)............. Equation 1
Where A = original amount of actinium-228, A' = amount of actinium-228 left after decay, a = Total time, n = half life
make A' the subject of the equation
A' = A/(2ᵃ/ⁿ)........... Equation 2
From the question,
Given: A = 70 milligram, a = 24.52 hours, n = 6.13 hours
Substitute these values into equation 2
A' = 70/(2²⁴°⁵²/⁶°¹³)
A' = 70/(2⁴)
A' = 70/16
A' = 4.375 milligram
The volume of a gas is 22.4 L when the pressure of the atmosphere is 1.00 atm. If the pressure is increased to 1.05 atm, without changing the temperature, what is the new volume?
K = °C + 273
Question 13 options:
a)
22.4 L
b)
23.5 L
c)
25.2 L
d)
26.3 L
A car is moving at a speed of 55 km/h. is it possible to calculate the car's kinetic energy on this information? 1 no. we also need to know the car's mass 2 yes. kinetic energy is equal to half of the square of the car's speed 3no. we also need to know the direction motion of the car 4. yes. kinetic energy is equal to the square of the car's speed
NO LINKS PLS!!!!! ILL REPORT YOU
Answer:
the answer is 1; no, you also need to know the car's mass.
Explanation:
6. If the pressure of a gas is 1.01 atm and the temperature is 25°C, then if the pressure is increased to 1.10, what is the new temperature?
Answer:
324.554 K
Explanation:
Which can be converted back to °C by subtracting 273
Once again thus answer can be found using the gas law P1/T1 =P2/T2
Remember to convert to Kelvin before doing the calculations by adding 273
temperature layer of the atmosphere with strong, steady winds and few weather changes.
What does it called?
Answer:
Stratosphere is heated from below the ozone layer, that because it protect the earth from ultraviolet rays from the sun. Mesophere has strong steady wind and few weather changes because the temperature in the mesophere drops and it has a strong wind coming from the east to the west.
If 1.5 moles of NaC₂H₃O₂ are dissolved in 750g of water, what is the molality of this solution?
2.0m
1.5m
2.6m
0.9m
Answer:
2m.
Explanation:
molality = no.of moles of solute ÷ mass of solvent in kg
molalty = 1.5 moles ÷ 0.75 g
= 2m
Help me please!!!!!!!
Answer:
The answer is A
Explanation:
The pH of an unknown strong acid is 2. What
is the hydronium ion concentration?
Answer: Finding the [H3O+] and pH of Strong and Weak Acid Solutions The larger the Ka, the stronger the acid and the higher the H+ concentration at equilibrium. hydronium ion, H3O+, 1.0, 0.00, H2O, 1.0×10−14, 14.00.
Explanation:The hydrogen ion in aqueous solution is no more than a proton, a bare ... the interaction between H+ and H2O .
When performing dimensional analysis, we usually use conversion factors. What is a conversion factor?
Answer:
A conversion factor is a variable that transforms the dimension of one variable into the terms of another variable.
Explanation:
Let be [tex]x[/tex] and [tex]y[/tex] two variables with diferent dimensions (units), [tex]r[/tex] is a conversion if transforms the dimension of one variable into the terms of the other variable. That is:
[tex]y = r\cdot x[/tex] (1)
Where:
[tex]x[/tex] - Input, [input unit]
[tex]y[/tex] - Output, [output unit]
[tex]r[/tex] - Conversion factor, [output unit] per [input unit]
A bowl containing 150 grams of water, is heated from 25 °C to 100 °C.
The specific heat of water is 4.184 J/gºC. How much heat energy is
required to heat the water?
Answer:
47,070J
Explanation:
Because we use the formula
Eh= m×c×∆T
Which is energy required equals mass times specific heat capacity times change in tempreture (final temp - initial temp )
What are the coefficients that will balance the skeleton equation below?
N, + H2
H NH3
1, 1, 2
3, 1, 2
1, 3,2
1, 3,3
Answer:
the answer is 1,3,2
Explanation:
Balance equation
Answer:
1,3,2
Explanation:
took test
11A) As electrical energy is converted into heat energy, the total amount of energy in the system
pls help me out !
Answer:
b. option Is the correct answer
this is a attachment from my text book can you help me
Answer:
Looks like a mitrochondria
Explanation:
2. (a) Solid calcium oxide was taken in a container and water was added slowly to it:
(i) Write the observation.
PLS ANSWERR
Explanation:
(i) Two observations made in the experiment are:-
(a) Temperature is raised due to the vigorous reaction.
(b) It is an exothermic reaction, heat is observed.
(ii)
quicklime
CaO
(s)+
water
H
2
O
(l)⟶
CalciumHydroxide
Ca(OH)
2
+Δ(heat)
∴ Calcium Hydroxide is produced.
PLS HELPP ...All alkali metals react with water to produce hydrogen gas and the corresponding alkali metal hydroxide
A typical is that between lithium and water: 2Li(s) + 2H2O(l) 2LiOH(aq) + H2(g)
(a) How many moles of H2 can be formed by the complete reaction of 6.23 moles of Li with
water?
(b) How many grams of H2 can be formed by the complete reaction of 80.57 g of Li with
water?
Answer:
A) 3.115 mol
B) 11.60 g h2
Explanation:
From the equation
2 mol Li gives 1 mol H2
Then 6.23 gives??
6.23 /2 = 3.116 mol H2
B) moles of Li =mass! molar mass
= 80.57/ 6.941 = 11.6 mol Li
Then moles of H2 = 11.6 /2 = 5.8 mol H2
Mass of H2 = mol * molar mass
5.8*2 =11.6 g h2
The moles of hydrogen formed with 6.23 moles of Li have been 3.115 moles. The mass of hydrogen formed with 80.57 grams of Li has been 11.60 grams.
From the balanced chemical equation,
2 moles Li = 1 mole Hydrogen
(a) The given moles of Li = 6.23 mol .
6.23 mol of Li = [tex]\rm \dfrac{1}{2}\;\times\;6.23[/tex] moles of hydrogen
6.23 mol Li = 3.115 moles of hydrogen.
The moles of hydrogen formed with 6.23 moles of Li have been 3.115 moles.
(b) The moles can be expressed as:
Moles = [tex]\rm \dfrac{weight}{molecular\;weight}[/tex]
Moles of Li in 80.57 grams:
Moles of Li = [tex]\rm \dfrac{80.57}{6.941}[/tex]
Moles of Li = 11.60 moles
The amount of Hydrogen formed:
2 moles Li = 1 mole Hydrogen
11.60 mol of Li = [tex]\rm \dfrac{1}{2}\;\times\;11.60[/tex] moles of hydrogen
11.60 mol Li = 5.803 moles of hydrogen.
Mass = moles × molecular mass
Mass of 5.803 moles of Hydrogen = 5.803 × 2
Mass of hydrogen = 11.60 grams
The mass of hydrogen formed with 80.57 grams of Li has been 11.60 grams.
For more information about the moles formed, refer to the link:
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When a substance changes from a gas to a liquid, what happens to the energy, order, and spacing of
particles within the substance?
I
Answer:
Explanation:
When gas changes to liquid, it releases the thermal energy that has been absorbed before to become gas which does not alter the temperature at all. A reduction in energy changes the arrangement of particle. There spacing between the particles also increases but not as in a gaseous state and so does the kinetic energy. The particles now are now arranged in irregular pattern.
Balance the following chemical equation. Choose the correct coefficients in the balanced equation in order. *
4, 3, 2
2, 4, 2
1, 1, 1
3, 2, 3
Answer: 4,3,2
Explanation:
Please help!!
All fake answers get reported immediately. Yes, I am a girl -_-
Answer:
1.)C₃H₈O
2)OH
3.)1-propanol
1.) C4H8O
2.) C2H6O or CH3CH2OH
3.)Ethanol
Explanation:
Hope this help
How many molecules are in 0.500 mole of N2O5?
Answer:
3,011.10e23.
Explanation:
Mole measure the number of elementary entities of a given substance that are present in a given sample. 3.01×10²³molecules are in 0.500 mole of N₂O₅.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. Mole is directly proportional to given mass.
Mathematically,
Number of molecules/atoms/ions of N₂O₅ = number of moles×6.022×10²³(Avogadro number)
Number of moles of N₂O₅= 0.500 mole
Substituting the given values, we get
Number of molecules/atoms/ions =0.500moles×6.022×10²³(Avogadro number)
Number of molecules/atoms/ions of N₂O₅ =3.01×10²³molecules.
Therefore, 3.01×10²³molecules are in 0.500 mole of N₂O₅.
To know more about mole, here:
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If a solution has a [H+] of 9.3x10-11, what is the pH?
Answer:
10.03Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log [ {H}^{+} ][/tex]
From the question we have
[tex]ph = - log(9.3 \times {10}^{ - 11} ) \\ = 10.0315...[/tex]
We have the final answer as
10.03Hope this helps you
What does an emission spectrum look like?
A. It is a set of lines corresponding to photon emission wavelengths.
B. It is a white light source separated into a band of colors.
C. It is a graph showing the temperature dependence of emissions.
D. It is a band of colors with dark lines at absorption wavelengths.
SUERIT
Answer:
It should be B
Answer:
The answer is It is a set of lines corresponding to photon emission wavelengths.
Explanation:
I just did it on A pex and this is correct. Maybe there is a question with similar wording that is making other people get the answer wrong so make sure that your question says "What does an emission spectrum look like" and then your answer will be A.
How many joules of heat is needed to heat 68.00 grams of aluminum foil from
55.00 °C to 93.00 °C if aluminum has a specific heat of 0.90 J/g °C?
Answer:
2,325.6
Explanation:
You use the formula
Q =mco
M =mass =68
C=0.9
O=temperature increases =93-55=38
Then multiple all this 3
Q=68*0.9*38
The number of joules of heat that is needed to heat 68.00 grams of aluminum foil is 2,325.6.
What is specific heat?The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.
By the formula of heat
Q = mct
The mass of aluminum is 68.00
the difference in temperature is 93.00 °C - 55.00 °C = 38.00
The specific heat is 0.90 J/g
Putting the values in the equation
[tex]Q = mct\\\\Q = 68.00 \times 0.90 \times 38.00 = 2325.6[/tex]
Thus, the joules of heat is 2325.6 J.
Learn more about specific heat
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What is the molarity of 125 mL of a 8.25 M NaCl solution that has been diluted to 750. mL?
a) 11 400 M
b) 0.00138 M
c) 1380 M
d) 0.0202 M
e) 1.38 M
Answer:
1.375 M
Explanation:
Using the formula as follows;
C1V1 = C2V2
Where;
C1 = initial concentration/molarity (M)
V1 = initial volume (L)
C2 = final concentration/molarity (M)
V2 = final volume (L)
According to the information in this question;
C1 = 8.25 M
C2 = ?
V1 = 125 mL = 125/1000 = 0.125L
V2 = 750 mL = 750/1000 = 0.750L
Using C1V1 = C2V2
8.25 × 0.125 = C2 × 0.750
1.03125 = 0.750C2
C2 = 1.03125 ÷ 0.750
C2 = 1.375 M
3. How much heat (in joules) is needed to raise the temperature of 355 g of ethanol I
(c = 2.4 J/gºC) by 63°C?
q=mcAT
Answer:
53676 J
Explanation:
m = 355 g
c = 2.4 J/gºC
ΔT = 63°C
q = mcΔT
= (355)(2.4)(63)
= 53676 J
The amount of heat is 53676J to raise the temperature of 355 g of ethanol.
What is temperature?Temperature is a measurement of the amount of energy of the atoms in a system or a physical quantity that expresses hot and cold.
What is heat?Heat is energy that is transmitted through one body to some other due to a temperature differential. When two bodies of different temperatures come together, energy can be transferred (heat flows) from the hotter to the colder.
It can be determined by the formula:
q =mCΔT.
where, q is heat, m is mass , C is and T is temperature.
Calculation of heat is shown below:
It is given that, mass of ethanol = 355 g, c = [tex]2.4 J/g^{0}[/tex] C, ΔT. = [tex]63^{0} C[/tex]
Now, put the values of given data in heat formula:
q =mCΔT
= 355×2.4×63
=53676J.
Therefore, the amount of heat will be 53676J to raise the temperature of 355 g of ethanol
To know more about heat and temperature click here.
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The total pressure of two unknown gases is 5 kPa. The partial pressure of one of the gases is 2.345 kPa, what is the partial pressure of the other gas?
Answer:
[tex]p_2=2.655kPa[/tex]
Explanation:
Hello there!
In this case, according to the Dalton's law, which states that the total pressure is equal the sum of the pressures of the gases in the mixture, we write the following for this system:
[tex]P_T=p_1+p_2[/tex]
Thus, we solve for the partial pressure of the gas #2 as shown below:
[tex]p_2=P_T-p_1\\\\p_2=5kPa-2.345kPa\\\\p_2=2.655kPa[/tex]
Best regards!
Balance the equation ___C+___Fe203—-____CO2+___Fe
Answer:
3,2,3,4
Explanation:
try this answer, it's syits best to the question
PLEASE HELP. I WILL GIVE BRAILIEST. I DON'T HAVE TIME PLEASE Which type of reaction does this diagram represent?
C H 3 single bonded to C, which is single bonded above to H and double bonded to O, plus H C N right arrow C H 3 single bonded to C, which is bonded above to H, to the right to O H, and below to C N.
addition
condensation
elimination
substitution
Answer:
addition
Explanation:
Answer:
Explanation:
Edge 2022
How many meters in 500 km?
5,000
0.005
500,000
0.5000
Answer:
c i need 3 brainliests for virtuoso rank pls
Explanation:
Answer:
500,000 m
Explanation:
Each km has 1000m so to covert any km to m simply multiply the length value by 1000.
500 x 1000 = 500,000
