Answer:
V₂ = 106.5 mL
Explanation:
Given data:
Initial volume =200 mL
Initial pressure = 2 atm
Initial temperature = 35 °C (35 +273 = 308 K)
Final temperature = 55°C (55+273 = 328 K)
Final volume = ?
Final pressure = 4 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 2 atm ×200 mL × 328 K / 308 K ×4 atm
V₂ = 131200 atm .mL. K / 1232 K.atm
V₂ = 106.5 mL
How many atoms are in 10.4 mol of CI?
Answer:
there are two atoms
1. hydrogen
2.and water
Answer:
[tex]\boxed {\boxed {\sf 6.26 \times 10^{24} \ atoms }}[/tex]
Explanation:
To convert from moles to atoms, we must use a number called Avogadro's Number which is:
[tex]6.022\times10^{23}[/tex]
This number tells us the amount of atoms in a mole.
[tex]1 \ mole = 6.022\times10^{23} \ atoms[/tex]
To convert from moles to atoms, we must multiply Avogadro's number by the amount of moles.
We know there are 10.4 moles of Chlorine. Multiply 10.4 (molar amount) by 6.022 * 10²³ (Avogadro's Number)
[tex]10.4 \ mol *\frac{6.022\times10^{23} \ atoms }{ 1 \ mole}[/tex]
[tex]10.4 * 6.022\times10^{23} \ atoms[/tex]
[tex]1 \ mole = 6.022\times10^{23} \ atoms[/tex]
[tex]6.26288 \times 10^{24} \ atoms[/tex]
Let's round to 3 significant figures, because the original measurement 10.4, has 3 sig figs (1, 0, and 4)
For the number 6.26288, 3 significant figures is the hundredths place. The 2 in the thousandth place tells us to keep the 6 in the hundredths place.
[tex]6.26 \times 10^{24} \ atoms[/tex]
There are about 6.26 × 10²⁴ atoms in 10.4 moles of chlorine.
Which test uses color change to reveal oil-based paints?
mass spectometry
gas chromatography
potassium hydroxide test
ethanol test
Answer:
potassium hydroxide test
Explanation:
The test that uses color change to reveal oil-based paints is the potassium hydroxide test. The correct option is c.
What is a potassium hydroxide test?The KOH (potassium hydroxide) approach is used to test for yeast in specimens. Potassium hydroxide acts as an enzymatic agent, breaking down detritus in a specimen, such as epithelial cells and WBCs, allowing yeast or pseudohyphae to be seen.
The potassium hydroxide prep test is used to detect fungal diseases on the skin or in the nails. A scrape of cells from the afflicted area is examined under a microscope for evidence of fungus. The potassium hydroxide skin lesions exam, fungal smear, or skin scraping are other names for the potassium hydroxide test.
Therefore, the correct option is the c, potassium hydroxide test.
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Using the geologic concept of plate boundaries, compare and contrast the formation of the Andes Mountains,
Himalayan Mountains, the islands of Japan, Iceland, and the San Andreas area of California?
Plz I need help
You have used 2. 6×102 L of distilled water for a dialysis patient. How many gallons of water is that?
By unit conversion, the distilled water for dialysis in gallons is 68.69 gallons.
We need to know about unit conversion to solve this problem. The unit conversion can be used to convert a unit to another unit. It can be defined as
a = xb
where a is unit a, b is unit b and x is the constant of conversion.
From the question above, we know that
V = 2.6 x 10² liters
The unit conversion that we used is (1 gal = 3.785 liters)
V = 2.6 x 10² liters
V = 2.6 x 10² / 3.785 gal
V = 68.69 gallons
Hence, the distilled water for dialysis in gallons is 68.69 gallons.
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2. The combustion of octane is -47.5 kJ/g.
a. Write the reaction for the combustion of octane.
b. What is the value of the enthalpy of combustion for octane per mole?
c. If the enthalpy of combustion was written with the reaction, what value would be
used?
The enthalpy of combustion per mole is -5397.7 kJ/mol.
What is combustion?The term combustion refers to a reaction in which a substance is burnt in oxygen. Now we know that octane is a hydrocarbon and its combustion follows the general equation for the combustion of hydrocarbons.
[tex]2C_{8}H_{18} (g) + 25O_{2} (g)---- > 16CO_{2} (g) + 18H_{2} O(g)[/tex]
Given that the number of moles in one gram of octane is obtained from;
1g/114 g/mol = 0.0088 moles
If the burning of 0.0088 moles of octane produces -47.5 kJ
Burning of 1 mole of octane would produce 1 mole * -47.5 kJ/0.0088 moles
= -5397.7 kJ/mol
We can now write is as;
[tex]2C_{8}H_{18} (g) + 25O_{2} (g)---- > 16CO_{2} (g) + 18H_{2} O(g)[/tex] ΔH = -5397.7 kJ/mol
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Prompt
The skeletal system, the muscular system, and the nervous system all work together. Explain one link between the skeletal system and the muscular system, between the skeletal system and the nervous system, and between the muscular system and the nervous system.
Answer:
They work in unision
Explanation:
The skeletal system is the framework our muscular system is attached to. The muscular system also allows the bones to move through contracting and extending. Although both would be useless without the nervous which sends impulses that tell the muscles to contract and extend.
Answer:
The person above is correct!
Explanation:
It graded it 100%.
ASAP pleaseee and Thankyou
Arrange the atoms in an increasing order of ionization energy. Choose the correct order below.
A.
Hydrogen, Helium, Beryllium, Lithium
B.
Hydrogen, Helium, Lithium, Beryllium
C.
Lithium, Hydrogen, Beryllium, Helium
D.
Lithium, Beryllium, Hydrogen, Helium
Why Are Microorganism's Used to separate waste products from water?
Answer:
Untreated water from rivers, lakes, ponds, springs, or streams is likely to contain unsafe levels of infectious microorganisms, and drinking it may cause illness.
Explanation:
PLS ANSWER THESE 3 QUESTIONS WHICHEVER YOU KNOW!!
1.For an object at rest, the normal force equals the gravitational force. What is the sum of these forces called?
·ω·
A Net force
B Unbalanced force
C Inertia
D Potential force
2. Which of the following best describes the forces when there are different-sized forces from opposite directions acting on an object?
a Positive
b Negative
c Unbalanced
d Gravitational
3. An object is at rest on a table. The gravitational force is 10 N down, and the normal force is 10 N up. What is the net force?
An object at rest on a table. An arrow pointing down represents 10 newtons of gravitational force. An arrow pointing up represents 10 newtons of normal force.
a 10 N up
b 0 N
c 10 N down
d 20 N up
Answer:
I only know 3 its 0 N because 10-8=2 and 2-2=0
Explanation 10-8=2 2-2=0
When a car takes a sharp turn to the left and the person in the car slides to the right, this
is an example of
A. Newton's First Law of Motion
B. Newton's Second Law of Motion
C. Newton's Third Law of Motion
D. Newton's Law of Gravity
Answer:
It is newtons First Law:)
Explanation:
ice _______________ - a collective term for several mechanical weathering processes induced by stresses created by the freezing of water into ice.
Answer: Frost weathering is a collective term for several mechanical weathering processes induced by stresses created by the freezing of water into ice.
2. Water is an example of a(n)
a. inorganic b. organic
compound.
d. none of these
c. carbon
it would be A ,inorganic Compound
Michael’s teacher showed him a sample of charcoal dust and a diamond, as seen in the table below. He was very surprised when she told him both substances were made up of carbon. Why do these two forms of carbon look so different?
Answer:
They are isotopes of each other ,meaning they are made of chemically the same substance but the number of neutrons is different.
Explanation:
if the protons are 6 the neutrons are 6 and the electrons are 6 what is the total charge
Answer:
0
General Formulas and Concepts:
Chemistry - Atomic Structure
Protons have a positive (+) charge.Neutrons have a neutral (0) charge.Electrons have a negative (-) charge.Explanation:
Step 1: Define
6 Protons
6 Neutrons
6 Electrons
Step 2: Determine charges
6 Protons = + 6 charge
6 Neutrons = 0 charge
6 Electrons = - 6 charge
Step 3: Determine overall charge
+6 + 0 + -6 = 0
Why do you think the mass of the egg changed in water and salt water?
What is the electron configuration for manganese
Electron configuration for manganese is [Ar]3d⁵4s² and electron configuration is the distribution of electrons of an atom or molecule
The electronic configuration of an element is a symbolic notation of the manner in which the electrons of its atoms are distributed over different atomic orbitals and atomic number of manganese is 25 then electronic configuration [Ar]3d⁵4s² manganese is a chemical element with the symbol Mn and it is a hard, brittle, silvery metal, often found in minerals in combination with iron and atomic mass is 55.93 and we write electronic configuration is 1s²2s²2p⁶3s²3p⁶4s²4d⁵ called as electronic configuration of manganese
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. If the half-life of cesium-133 is 30 years, how much of a 600g sample of cesium-133 will be left after
150 years
Answer:
Caesium (55Cs) has 40 known isotopes, making it, along with barium and mercury, one of the elements with the most isotopes. The atomic masses of these isotopes range from 112 to 151. Only one isotope, 133Cs, is stable. The longest-lived radioisotopes are 135Cs with a half-life of 2.3 million years, ... It constitutes most of the radioactivity still left from the Chernobyl accident ...
Which compound listed below has the largest molar mass?
Ca(OH)2
H20
CaCl2
NH3
Answer: the answer would be CaCI2
Explanation: this was one of my exam questions i got right. :)
Well i still kinda don't get the differences of climate and weather.so what i need help with is what are the differences of climate and weather?
Answer:
climate
Explanation:
climate is the weather conditions for a long period of time, weather is the short term conditions of a location. The answer would be climate because the general climate is colder.
Answer:
D climate
Explanation:
Alright here is a sum up, Weather is the rain, coldness, heat all through the days, like tommorow will be raining. that is weather, weather = short term. climate is the area on the equator, so florida will be warmer than canada, so climate = long term
. Both element K and element L are found in period 3 of the periodic
table. If K is in group 13 while L is in group 15, which of the two
has a greater atomic number? Explain.
Answer: L element has greater atomic number.
Explanation:
The periodic table contains vertical columns called as groups and horizontal rows called as periods.
Period 3 contains 8 elements which are sodium, magnesium , aluminium , silicon , phosphorous , sulphur, chlorine and argon.
K element which belongs to group 13 is aluminium with atomic number of 13 . L element which belongs to group 15 is phosphorous with atomic number of 15.
Thus L element has greater atomic number.
What is the mass of 0.78 mol Mg(NO3),? Make sure to round to the correct number of sig figs and to include the unit in your final answer
Answer:
67.08 g
Explanation:
you firts write what u know
then u calculate the molar mass of the salt
then according to the formula mass= number of mols × molar mass you find the mass
m= mass
n= number of mol
M= molar mass i hope this helps
C6H12O6 + 6O2 → 6CO2 + ? H2O + energy
Whats the answer? I really don't know,
Answer: C. 6
Explanation:
According to the Law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The balanced chemical reaction for photosynthesis is :
[tex]C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O+energy[/tex]
Thus the coefficient of water is 6.
which is an expression of molality
Answer:The formula for molality is m = moles of solute / kilograms of solvent.
Explanation:
The vertical columns (top to bottom) on the periodic table are called
Answer:
group
Explanation:
the rows are called periods
groups 1-8
can someone help please !!!!
Answer:
x = 231/90 Th
Explanation:
Ms. Salis explains to her class that sodium (Na) and chlorine (Cl) atoms bond to make table salt
(NaCl). Which is the best description of table salt? *
A)It is a cell.
B)It is an atom.
C)It is an element.
D)It is a compound
lonic Bonding
Why did it require two sodium atoms to Complete
the Na 0 formula unit?
Na has +2 charge and O has -1 charge.
Na has +1 charge and O has -2 charge
Na has -2 charge and O has +1 charge.
In TEN complete sentences, describe how the LAW OF CONSERVATION applies to the stuff YOU OWN. For example: In real life, can new XBOXs be magically created, or garbage magically destroyed? Why? You are made up of recycled atoms. Where did these atoms come from? *
Answer:
Both the initial and final substances are composed of atoms because all matter is composed of atoms. According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and type of atoms after the chemical change as were present before the chemical change.
Explanation:
The atoms that make up your body were produced inside a star and have ... I read once that atoms get recycled so much through the planet that each of ... from William Shakespeare, but I do know this: All of us come from stars. ... If you have gold fillings in your teeth, those atoms came from a star explosion.
Which of the following definitions best describes a parallel of latitude?
a--A line that is drawn horizontally around the earth and is parallel to the Prime Meridian.
b---A line that is drawn vertically down the earth and is parallel to the equator.
c--A line that is drawn vertically down the earth and is parallel to the Prime Meridian.
d--A line that is drawn horizontally around the earth and is parallel to the equator.
The statement that express the definitions of parallel of latitude as regards this question is :A: A line that is drawn horizontally around the earth and is parallel to the Prime Meridian.
A circle of latitude can be regarded as a line of latitude that found on Earth, it can be explained as abstract (east–west) small circle which connect all locations around Earth and this is been done at a particular latitude coordinate line.It is drawn horizontally and usually parallel to Prime Meridian.Therefore, option A is correct.
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