Answer:
97.44 K
Explanation:
to answer this one you should use the ideal gas law PV=nRT where P=pressure, V=volume, n=number of moles of gas, R=universal gas constant (0.0821), and T=temperature in Kelvin. All you have to do is substitute the givens into the equation.
(3.10)(16)=(6.20)(0.0821)(T)
then simplify
49.6=(.50902)(T)
divide to get T alone and you get about 97.44 K as your answer
Two ways water and ice are the same
Answer:
1- water is ice
2- ice is water
Explanation:
1- the water is just froze
2- the ice is just solid water
The_______ and _____ are the main systems that move fluid throughout the body.
Answer:
circulatory system, lymphatic system
Explanation:
I just did the assigment and got it right.
Jean's mother lit a candle and placed it on his birthday cake. As they sang happy birthday, the wick burned, the wax
melted, the candle changed shape, and the air around the candle heated up. Which of the following is NOT an
example of a physical change?
Answer:
The wick burning
Explanation:
A sample of nickel weighs 7.5425 g and has a density of
8.8 g/cm3. What is the volume with the correct number of
significant figures?
Answer:0.86
Explanation:
?
We can use the equation:
volume = weight / density
volume = [tex](7.5425 g) / (8.8 g/cm3) = 0.8585 cm3[/tex]
The volume of the sample is 0.8585 [tex]cm^{2}[/tex], with three significant figures.
What is volume?Volume is a measure of the amount of space that an object occupies, or the capacity of a container. It is typically measured in units of length cubed, such as cubic meters (m3), cubic centimeters (cm3), or cubic inches (in3).
Volume is an important concept in physics and engineering, as it is used to describe the size and capacity of objects and containers. It is also used in many everyday applications, such as measuring the volume of a liquid in a bottle or the volume of a box or suitcase.
The volume of an object or container can be calculated by multiplying its length, width, and height (if it has a regular shape) or by using more complex mathematical formulas if it has an irregular shape. The volume of a solid object is often expressed in terms of its density, which is the mass of the object per unit of volume.
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The common name for butanone, a readily available solvent, is
Answer:
methyl ethyl ketone
Explanation:
(MEK)
last post as a troll lol, sorry but i need actual help this time.
Answer:
Lol
Explanation:
lol
nah
7. Calculate the amount of energy required heat 100.g to the following: a. H2O(s) changes to H2O(l) at 0°C b. H2O(l) changes to H20 (s) at 0°C c. H2O(l) at 10°C changes to H2O(l) at 20°C
a=b=33400 J
c=4180 J
Further explanation
Heat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
The heat to change the phase can be formulated :
Q = mLf (melting/freezing)
Q = mLv (vaporization/condensation)
Lf=latent heat of fusion
Lv=latent heat of vaporization
The heat of fusion for water at 0 °C : 334 J/g and the heat of vaporization at 100 °C : 2,230J/g
a. melting
[tex]\tt Q=100.334=33400~J[/tex]
b. freezing
[tex]\tt Q=100.334=33400~J[/tex]
c.raise the temperature(c water = 4.18 J/g C)
[tex]\tt Q=100\times 4.18\times (20-10)=4180~J[/tex]
Tetrachloromethane, CCl4 is produced from the substitution reaction between methane and chlorine gas. If the rate of formation of CCl4 is 0.05 mol dm^-3 min^-1, what is the rate of disappearance of chlorine gas?
The rate of disappearance of chlorine gas : 0.2 mol/dm³
Further explanationThe reaction rate (v) shows the change in the concentration of the substance (changes in addition to concentrations for reaction products or changes in concentration reduction for reactants) per unit time.
For reaction :
[tex]\tt aA+bB\rightarrow cC+dD[/tex]
The rate reaction :
[tex]\tt -\dfrac{1}{a}\dfrac{d[-A]}{dt}= -\dfrac{1}{b}\dfrac{d[-B]}{dt}=\dfrac{1}{c}\dfrac{d[C]}{dt}=\dfrac{1}{d}\dfrac{d[D]}{dt}[/tex]
Reaction for formation CCl₄ :
CH₄+4Cl₂⇒CCl₄+4HCl
From equation, rate of reaction = rate of formation CCl₄ = 0.05 mol/dm³
Rate of formation of CCl₄ = reaction rate x coefficient of CCCl₄
0.05 mol/dm³ = reaction rate x 1⇒reaction rate = 0.05 mol/dm³
The rate of disappearance of chlorine gas (Cl₂) :
Rate of disappearance of Cl₂ = reaction rate x coefficient of Cl₂
Rate of disappearance of Cl₂ = 0.05 x 4 = 0.2 mol/dm³
Protons + Neutrons = the atomic ?
Answer:
The atomic mass number is the number of protons and neutrons in an atom.
What is the daughter nuclide when 0-15 experiences positron emission?
The daughter isotope (a decay product)of O-15 = N-15(Nitrogen 15)
Further explanationRadioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,
alpha α particles ₂He⁴ beta β ₋₁e⁰ particles gamma particles γ positron particles ₁e⁰O-15 emits positron particles ₁e⁰, so the atomic number decreases by 1, the mass number is the same
Reaction
[tex]\tt _8^{15}O\Rightarrow _7^{15}N+_1^0e[/tex]
The mass number of the daughter isotope = 15, atomic number = 7
If we look at the periodic system, the element with atomic number 7 is Nitrogen (N)
What is the element Ar classified as in the periodic table?
a noble gas
a halogen
a metalloid
a metal
The element Ar classified as noble gas in the periodic table. Therefore, the correct option is option A.
What is noble gas?The noble gases are a group of chemical elements that share several characteristics. They are all monatomic, odourless, and colourless gases with relatively little chemical reactivity under normal conditions. Oganesson (Og) is a highly radioactive element created synthetically.
Although the IUPAC has included oganesson since "group 18" and "noble gas" have been used interchangeably, oganesson may not be appreciably chemically noble and therefore is projected to deviate from the norm and just be reactive owing to relativistic effects. Its chemistry is still being studied due to the exceptionally short 0.7 ms ½ of its sole known isotope. The element Ar classified as noble gas in the periodic table.
Therefore, the correct option is option A.
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Using the same sample of gas (P1 = 565 torr , T1 = 27 ∘C ), we wish to change the pressure to 5650 torr with no accompanying change in volume or amount of gas. What temperature T2, in Celsius, is needed to reach this pressure?
Answer:
2726.85 °C
Explanation:
Given data:
Initial pressure = 565 torr
Initial temperature = 27°C
Final temperature = ?
Final pressure = 5650 torr
Solution:
Initial temperature = 27°C (27+273 = 300 K)
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
T₂ = P₂T₁ /P₁
T₂ = 5650 torr × 300 K / 565 torr
T₂ = 1695000 torr. K /565 torr
T₂ = 3000 K
Kelvin to degree Celsius:
3000 K - 273.15 = 2726.85 °C
WILL GIVE BRAINLYLEST ANSWER!! You discover a new and strange liquid. It has the mass of 70 g and volume of 84 mL. Will the liquid float in water or sink to the bottom of a cup a of water?
Answer: The strange liquid would float to the top of a cup of water.
Explanation:
Density = Mass/Volume
Strange Liquid Density = 70g/84mL
Strange Liquid Density = 0.833g/mL
Density of water in g/mL = 1 g/mL
Strange Liquid Density < Water Density
A substance with a lower density would be suspended above a substance with a higher density.
Since the density of the strange liquid is less than that of water, it would float to the top of a cup of water.
Burning 12.00 g of an oxoacid produces 17.95 g of carbon dioxide and 4.87 g of water. Consider that 0.25
moles of oxoacid equals 44.0 g. For this compound, determine the empirical and molecular formula.
Answer: The molecular formula will be [tex]C_6H_6O_6[/tex]
Explanation:
Mass of [tex]CO_2[/tex] = 17.95 g
Mass of [tex]H_2O[/tex]= 4.87 g
Molar mass of carbon dioxide = 44 g/mol
Molar mass of water = 18 g/mol
For calculating the mass of carbon:
In 44g of carbon dioxide, 12 g of carbon is contained.
So, in 17.95 g of carbon dioxide, =[tex]\frac{12}{44}\times 17.95=4.89g[/tex] of carbon will be contained.
For calculating the mass of hydrogen:
In 18g of water, 2 g of hydrogen is contained.
So, in 4.87 g of water, =[tex]\frac{2}{18}\times 4.87=0.541g[/tex] of hydrogen will be contained.
Mass of oxygen in the compound = (12.00) - (4.89+0.541) = 6.57 g
Mass of C = 4.89 g
Mass of H = 0.541 g
Mass of O = 6.57 g
Step 1 : convert given masses into moles.
Moles of C =[tex] \frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{4.89g}{12g/mole}=0.407moles[/tex]
Moles of H=[tex]\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.541g}{1g/mole}=0.541moles[/tex]
Moles of O=[tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{6.57g}{16g/mole}=0.410moles[/tex]
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C =[tex]\frac{0.407}{0.407}=1[/tex]
For H =[tex]\frac{0.541}{0.407}=1[/tex]
For O = [tex]\frac{0.410}{0.407}=1[/tex]
The ratio of C : H : O = 1: 1 : 1
Hence the empirical formula is [tex]CHO[/tex].
Hence the empirical formula is [tex]CHO[/tex]
The empirical weight of [tex]CHO[/tex] = 1(12)+1(1)+1(16)= 29 g.
If 0.25 moles has mass of 44.0 g
Thus 1 mole has mass of = [tex]\frac{44.0}{0.25}\times 1=176g[/tex]
Thus molecular mass is 176 g
Now we have to calculate the molecular formula.
[tex]n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{176g}{29g}=6[/tex]
The molecular formula will be=[tex]6\times CHO=C_6H_6O_6[/tex]
Why does the Sun gravitationally dominate all other objects in the Solar System?
Calcium hydroxide and hydrogen gas are produced by the reaction of calcium hydride and water
Explanation:
The reaction forms calcium hydroxide, Ca(OH)2 and hydrogen gas (H2). The calcium metal sinks in water and after an hour or so bubbles of hydrogen are evident, stuck to the surface of the metal.
Answer: B) calcium hydride + water -> calcium hydroxide + hydrogen
Explanation: B) on EDG
Please help. Im not a very smart person
what are the 4 quantum numbers of Kr?
Answer:
2 8 18 8 those are the ones I believe.
How many moles of nitrogen gas would be produced if 3.27 moles of copper(II) oxide were reacted with excess ammonia in the following chemical reaction? 2 NH3(g) + 3 CuO (s) – 3 Cu(s) + N2(g) + 3 H2O(g)
Moles of Nitrogen(N₂) gas would be produced : 1.09
Further explanationThe reaction coefficient in a chemical equation shows the mole ratio of the components of the reactants and products
If one mole of the reactant or product is known, then we can determine the moles of the other compounds involved in the reaction
Reaction
2NH₃(g) + 3CuO (s) ⇒ 3Cu(s) + N₂(g) + 3 H₂O(g)
Copper(II) oxide was reacted with excess Ammonia, so CuO as a limiting reactant and moles of the product is based on moles of CuO
moles of CuO = 3.27
From the equation, the mol ratio of CuO : mol N₂ = 3 : 1, so mol N₂ :
[tex]\tt \dfrac{1}{3}\times 3.27=1.09[/tex]
While you are doing your homework, a friend looks over your shoulder and sees electron configurations on your paper. "Whats That?" your friend says. Write down how you would respond to your friend. In your response, explain why the order of electron orbitals in an electron configuration the way it is.
Answer:
The energy of atomic orbitals increases as the principal quantum number, n, increases. In any atom with two or more electrons, the repulsion between the electrons makes energies of subshells with different values of l differ so that the energy of the orbitals increases within a shell in the order s < p < d < f.
Explanation:
Which item is made from a basic ingredient
Answer: it's soap.
Explanation:
Soap has a lot of salt which makes it a Basic ingredient.
Which option is an example of a chemical property?
density
melting point
rusting ability
boiling point
What would the unit of measurement be for the density of a regular solid?
Answer:
SI unit: kg/m³
but g/cm³ is commonly used
Explanation:
The nucleus is the cell as
A nucleus is an organelle found in the eukaryotic cells. Inside it's fully enclosed nuclear membrane, it contains the minority of the cell's genetic material. This material would be called DNA molecules.
Hope this helps! If not I'm so sorry. Have a lovely day
Car battery energy that makes device work
Answer:
No it's not make device work
Explanation:
I think soo
predict the shape and hybridization of platinum tetrachloride (PfCl4)
Answer:
Shape- square planar , hybridisation-sp3
Explanation:
Shape:
VSPER theorey is used to determine both electron geometry and molecular geometry of a molecule.(PtCl4)2 molecular geometry is square planarHybridisation:It undergoes sp3 hybridisation.since there are 2 unpaired electrons in this case, it is paramagnetic in natureHow many atoms are in 39.2 g of calcium?
a) 6.022 x 10^23 aoms
b) 235.2 x 10^23 atoms
c) 5.89 x 10^23 atoms
d) 40.08 x 10^23 atoms
Answer:
5.89× 10²³ atoms of Ca
Explanation:
Given data:
Mass of Ca = 39.2 g
Number of atoms = ?
Solution:
Number of moles of Ca:
Number of moles = mass/molar mass
Number of moles = 39.2 g/40.078 g/mol
Number of moles = 0.978 mol
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
0.978 mol × 6.022 × 10²³ atoms / 1 mol
5.89× 10²³ atoms of Ca
1.Outline the results of the Cathode ray tube?
Answer:
this showed that the cathode rays traveled in straight line
A solution has a [H+] of 0.20 M. Find the pH of this solution.
The pH of this solution : 0.699
Further explanationpH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.
pH = - log [H⁺]
So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.
A solution whose value is different by n has a difference in the concentration of H⁺ ion of 10ⁿ.
A solution has a [H+] of 0.20 M, so [H⁺]=0.2
[tex]\tt pH=-log[H^+]\\\\pH=-log[0.2]\\\\pH=1-log~2\\\\pH=0.699[/tex]
A balloon originally had a volume of 4.39 L at 44C and a pressure of 729 torr  to what temperature must the balloon be cooled to reduce its volume to 3.78 L of the new pressure is at 1.0 atm
The new temperature : 11.56 °C
Further explanationBoyle's law and Gay Lussac's law
[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]
P1 = initial gas pressure (N/m² or Pa)
V1 = initial gas volume (m³)
P2 = final gas pressure
V2 = final gas volume
T1 = initial gas temperature (K)
T2 = final gas temperature
V₁=4.39 L
T₁=44+273=317 K
P₁ = 729 torr = 0,959211 atm
V₂=3.78 L
P₂= 1 atm
[tex]\tt \dfrac{0.959211\times 4.39}{317}=\dfrac{1\times 3.78}{T_2}\\\\T_2=\dfrac{1\times 3.78\times 317}{0.959211\times 4.39}\\\\T_2=284.559~K=11.56~C[/tex]