The quantity in moles of sodium atoms is 0.631 moles of sodium if you have 3.80 × 10²³ moles of sodium.
What is moles?Moles is defined as a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules and some other specified particles.
It is a very important unit of measurement which chemist use. It can also be defined as the amount of substance that contain exactly 6.022 x 10²³ elementary entities in a given substances.
1 moles = 6.022 x 10²³ atoms
3.80 × 10²³ atoms of sodium will have
3.80 × 10²³ x 1 mole of Na / 6.022 x 10²³ atoms
= 0.631 moles of Na
Thus, quantity in moles of sodium atoms is 0.631 moles of sodium if you have 3.80 × 10²³ moles of sodium.
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1.5 miles to centimeters
hi
1 mile is 1 609 meters. (rounded).
As there is 100 centimeters in a meter, then
1 mile is 160 900 centimeter.
Then 1.5 miles , is 1 mile + one half so :
160 900 + 160 900 /2 = 160 900 + 80 450
= 241 350
1.5 mile is 241 350 centimeters.
please note that the value of a mile was rounded.
why does the heating curve for ice/water/steam have areas which are flat?
Answer:
the areas which are flat in the heating curve is when matter is condensing
Perform the calculation and record the answer with the correct number of significant figures. Perform the calculation and record the answer with the correct number of significant figures.
(6.5−6.35)/3.49=
The value of the following expression is 0.0429 rounded off to 0.043. The correct number of significant figures is 2.
The given expression (6.5 - 6.35) / 3.49 is calculated as below
(6.5 - 6.35) / 3.49
0.15 / 3.49
0.04297
0.043
Zeros to the left of the first non-zero digit are considered as not significant. For example 0.00765 has only 3 significant numbers.
When multiplying and dividing measured quantities, the output of the calculation should have the same number of significant figures as the measured quantity with the fewest significant figures. When performing multiple stage calculations, do not round intermediate stage calculation results; keep as many digits as is practical and round off only in the final output
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Determine the kinetic energy of 1 mole oxygen at 250k. (R= 8.314 J/Kmol).
Answer:
The kinetic energy is,
Explanation :
The formula for kinetic energy is:
where,
R = gas constant = 8.314 J/mol.K
T = temperature =
Now put all the given values in the above kinetic energy formula, we get:
Therefore, the kinetic energy is,
Explanation:
at 298 K and 1 atm, which gas has the highest density?
SO3 gas has the highest density.
A modified version of the ideal gas law is used to calculate density, replacing moles and volume with density and molar mass.
The relationship between a gas's density and molecular weight can be demonstrated using the ideal gas law equation. The formula is d = MP/RT, where d is the gas's density in kilograms per liter, M is its molar mass in grams per mole, P is its pressure in atmospheric pressure units, and R is the gas law constant. The equation demonstrates that the molar mass increases as gas density increases.
d = PM/RT
d ∝ M
CO = 28
CO2 = 44
SO3 = 80
Cl2 = 71
Thus SO3 will be more dense.
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A sample of CH4 weighs 3.423 g. How many molecules of CH4 are in the sample writing in scientific notation?
Answer:
1.285 x 10²³ molecules CH₄
Explanation:
To find the amount of molecules in the sample, you need to (1) convert grams to moles (using the molar mass of CH₄) and then (2) convert moles to molecules (using Avogadro's Number). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 4 sig figs like the given value (3.423 = 4 sig figs).
Atomic Mass (C): 12.011 g/mol
Atomic Mass (H): 1.008 g/mol
Molar Mass (CH₄): 12.011 g/mol + 4(1.008 g/mol)
Molar Mass (CH₄): 16.043 g/mol
Avogadro's Number:
6.022 x 10²³ molecules = 1 mole
3.423 g CH₄ 1 mole 6.022 x 10²³ molecules
----------------------- x ------------------- x ------------------------------------------- =
16.043 g 1 mole
= 1.285 x 10²³ molecules CH₄
How many milliliters of 6.1 M HCI solutions are needed to obtain 0.150 mol HCI
The amount of volume in millilitres a 6.1 M HCI solution needed to obtain 0.150 mol HCI is 24.6mL.
How to calculate volume?The volume of a solution can be calculated by dividing the number of moles by the molarity of the solution as follows:
Volume = no of moles ÷ molarity
The molarity of a solution is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.
According to this question, 6.1 M HCI solutions are needed to obtain 0.150 mol HCI, the volume required can be calculated as follows:
Volume = 0.150moles ÷ 6.1 M
Volume = 0.0246 L
To convert this volume to millilitres, we multiply by 1000 to derive 24.6mL.
Therefore, the amount of volume in millilitres a 6.1 M HCI solution needed to obtain 0.150 mol HCI is 24.6mL.
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Your weather app reports the actual temperature as 34°F but the temperature on the thermometer outside is 35°F. What is the percent error of the recorded temperature (absolute error = ±1°F).
The percentage error of the recorded temperature is 2.9%
Formula for percentage errorPercentage error = (absolute error / actual measurement) × 100
Data obtained from the questionThe following data were obtaned from the question:
Actual temperature reading = 34 °FThermometer reading = 35 °FAbsolute error = 1 °FPercentrage error =?How to determine the percentage errorThe percentage error of the recorded temperature can be obtained as follow:
Percentage error = (absolute error / actual measurement) × 100
Percentage error = (1 / 34) × 100
Percentage error = 2.9%
Thus, the perecentage error of the recorded temperature is 2.9%
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9.
Which of the following contains one mole of neutrons?
A 1g of H
B 1g of C
C 2g of Mg
D 2g of Ne
Among the following option c "2g of Mg" is correct answer. 2g of Mg contains one mole of neutrons.
What is neutron?
The neutron is a neutral subatomic particle that, with the exception of common hydrogen, is a component of every atomic nucleus. Its rest mass is 1.67492749804 1027 kg, which is slightly more than that of the proton but 1,838.68 times higher than that of the electron. It has no electric charge.
Since you are taking the mass of magnesium (2 g) and dividing by the molecular mass of magnesium (24 g/mol), the formula
[tex]amount of substance=\frac{mass}{molar mass}[/tex]
informs you that you have 1/12 moles of magnesium. The quantity of magnesium in the question is not, however, being asked.
Each magnesium atom contains 12 neutrons (24 - 12). As a result, 1/12 moles of magnesium contain 1 mole of neutrons (1/12)(12).
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What are produced when asteroids, meteoroids, or comets hit the moon's surface?
Craters are produced when asteroids, meteoroids, or comets hit the moon's surface.
What are Craters?This refers to a type of depression which is formed on the surface of the planet, moon etc which are present in the solar system due to hyper velocity impact of a smaller body such as asteroids, meteoroids etc.
Craters can also be formed as a result of the explosion which results from the impact of the smaller bodies mentioned above. The moon has a lot of craters which was formed billions of years ago and is therefore the most appropriate choice in this scenario.
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Lab: Plate Boundaries and Movement lab report
Answer:
facts yo
Explanation
PLEASE HELP ASAP
Which element is a nonmetal?
O Hg
O Cu
O He
O Re
Answer:
He
Explanation:
Helium is a gas, not a metal.
A reaction, carried out in a bomb calorimeter with Ccal = 5.01 kJ/oC, gives off 318 kJ of heat. The initial temperature of the water is 24.8oC. The final temperature of the water in the calorimeter is ____ oC.
A reaction which is carried out in a bomb calorimeter with Ccal = 5.01 kJ/°C, gives off 318 kJ of heat. The final temperature of the water in the calorimeter is 88.27°C
What is Bomb Calorimeter?The calorimeter which used in order to determine the energy change during the reaction precisely is known as a bomb calorimeter.In modern Bomb calorimeter there is a development of the original type calorimeter known as Berthelot.The modern bomb calorimeter is generally made up of corrosion free steel in which the reaction takes place.The bomb calorimeter is a type of instrument which certainly used to measure the heat of reaction of compound at a fixed volume.It is also used to measure heat which is also called the change of internal energy (denoted by symbol ΔE). In chemistry, the changes of heat of a reaction is measured when there is fixed pressure and volume.Now,
according to the given question,
The given data is :
Ccal = 5.01 kJ/°C
Heat (q) = 318 kJ
Initial temperature = 24.8°C
Final temperature = ?
Now we know that equation of bomb Calorimeter is given by;
Equation:q = cΔT
Hence,
318kJ = 5.01 kJ/°C ( T(final) - 24.8°C )
T(final) = 88.27°C
Thus, from the above conclusion we can say that a reaction which is carried out in a bomb calorimeter with Ccal = 5.01 kJ/°C, gives off 318 kJ of heat. The final temperature of the water in the calorimeter is 88.27°C.
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What scientific steps would you take to identify if something is or isn’t matter?
Does air consists of elements only
Answer:
yes
Explanation:
it is a mixture of gases.
there are some other main gases like,
nitrogen with approximately 78%
and oxygen with 21%
and many other gases.
Your weather app reports the actual temperature as 34°F but the temperature on the thermometer outside is 35°F. What is the percent error of the recorded temperature (absolute error = ±1°F)
The percentage error of the recorded temperature is 2.9%
Formula for percentage errorPercentage error = (absolute error / actual measurement) × 100
Data obtained from the questionThe following data were obtaned from the question:
Actual temperature reading = 34 °FThermometer reading = 35 °FAbsolute error = 1 °FPercentrage error =?How to determine the percentage errorThe percentage error of the recorded temperature can be obtained as follow:
Percentage error = (absolute error / actual measurement) × 100
Percentage error = (1 / 34) × 100
Percentage error = 2.9%
Thus, the perecentage error of the recorded temperature is 2.9%
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8. Does hydrogen have more electrons than lithium?
Answer:
Lithium has more electrons than Hydrogen
Explanation:
Lithium has 2,1 electrons
Hydrogen has 1 electrons
Describe the climate of Lake Tahoe. How does its elevation and closeness to the ocean affect the climate?
The climate of a region is influenced by large bodies of water like oceans, seas, and major lakes. As a result, coastal regions will have different summer and winter temperatures.
What type of climate is there in Lake Tahoe?The weather in Tahoe is dry and moderate. There is relatively little humidity even in the summer, and snowstorms in the winter are when most precipitation occurs. The lake lies 1,890 meters above sea level at an elevation of 6,200 feet, although the nearby mountain peaks are between 9,000 and 10,000 feet higher (2,743 to 3,048 meters.)
What is the purpose of Lake Tahoe?In Nevada, Lake Tahoe is used as a reservoir for municipal and irrigation water storage. About 75% of the water supply for the quickly expanding Reno-Sparks region comes from Lake Tahoe and a few smaller publicly and privately owned reservoirs in the Truckee River system.
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Write the equilibrium constant expression for this reaction:
NH+4(aq) → NH3(aq)+H+(aq)
The equilibrium constant expression for the given reaction is:-
Equilibrium constant = [NH₃] [H⁺] / [NH₄⁺]
An equilibrium constant is the ratio of the concentration of products to the concentration of the reactant raised to the power of its coefficients.
The rate constants are constant at some particular temperature. It is equal to the rate constant for the forward reaction divided by the rate constant for the backward reaction.
aA + bB ⇄ cC + dD
The equilibrium constant for the reaction is given as
NH₄⁺ (aq) → NH₃ (aq) + H⁺ (aq)
The expression is given as
Equilibrium constant = [NH₃] [H⁺] / [NH₄⁺]
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7. matter of only one type of atom. what's the answer for this crossword puzzle I really need help I've been stuck on this question for 32 minutes !! :(
A substance containing only one type of atom is called a chemical element. This differs slightly from an element, which is a category of atoms based on their number of protons. A chemical element is a substance that exists in the real world and is formed from only one type of atom.
This substance can be a set of atoms present on their very own or the atoms can be bonded together to shape molecules of the simplest type of atom, together with oxygen. while a substance incorporates only one form of an atom, it is known as a detail. each detail has a unique name and specific houses which are one of a kind from all of the relaxation of the elements.
An atom is a particle of count that uniquely defines a chemical detail. An atom consists of a principal nucleus which is surrounded by using one or extra negatively charged electrons. The nucleus is definitely charged and consists of one or more fairly heavy particles known as protons and neutrons. isotopes are members of a family of detail that all have the same wide variety of protons but unique numbers of neutrons.
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The plasma level of a drug was found to be 5ng/dL.
How many milligrams of drug are present in 1 L of plasma?
please careful about the significant point and decimal place/point
The mass in milligrams of the drug present in 1 L of plasma is 5 * 10⁻⁵ mg
What is plasma?Plasma is the liquid part of blood which contains dissolved solutes such as ions, proteins and sugar.
Plasma concentration of fluid are important in general health, diagnosis and treatment of diseases.
The plasma level of the drug was found to be 5ng/dL.
I dl = 1/10 L
1 dL = 0.1 L
1 ng = 1 * 10⁻⁶ mg
5 ng = 5 * 10⁻⁶ mg
The milligrams of drug are present in 1 L of plasma = 5 * 10⁻⁶ mg/0/ L
The milligrams of drug are present in 1 L of plasma = 5 * 10⁻⁵ mg
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Be sure to answer all parts.
Give the name and formula of the compound formed from the elements 38L and 17M.
Answer:
Explanation:
55647 for b
A water sample of unknown phosphate concentration is found to have an absorbance of 0.460 after treatment with tin(II) chloride and ammonium molybdate. What is the concentration of phosphate ion in the sample?
Answer:
07 Question (2 points) See page 160 The concentration of phosphate ions in water samples can be determined by spectrophotometry. Samples are treated with tin(II) chloride and ammonium molybdate to react with the phosphate to make a blue complex. Before testing an unknown sample, a series of solutions with known concentrations is tested to create a calibration plot. Calibration data with concentration units of part per million (ppm) are shown in the graph below. Calibration Data for Phosphate Analysis D Absorbance 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 04 Rat B 0.0434 -0.0264 R = 0.9945 A A water sample of unknown phosphate concentration is found to have an absorbance of 0.460 after treatment with tin(II) chloride and ammonium molybdate. What is the concentration of phosphate ion in the sample? ppm
What sets of ions are present in calcium hydrogen phosphate, CaHPO4?
The "di" prefix in the common name comes from the removal of two protons from phosphoric acid, [tex]H_3PO_4[/tex], during the formation of the [tex]HPO_4^2^-[/tex]anion. Calcium mono-hydrogen phosphate is another name for dibasic calcium phosphate.
What is an ion?An ion is basically an electrically charged atom or molecule. By convention, the charge of an electron is considered to be negative, and this charge is equal to and opposite to the charge of a proton, which is considered to be positive.
The common name's "di" prefix originates from the expulsion of two protons from phosphoric acid, [tex]H_3PO_4[/tex], even during establishment of the [tex]HPO_4^2^-[/tex] anion.
Thus, it can be concluded that the ions in the calcium hydrogen phosphate are calcium ion and hydrogen phosphate ion.
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If the air pressure at sea level is 1,014 mbar, what would you expect would happen to
the air pressure in a hole that is dug 1,000 feet below ground? (Assume the hole is dug
in ground with an altitude of 0 feet.
The pressure within Earth's atmosphere is referred to as atmospheric pressure or barometric pressure. The definition of the standard atmosphere is 101,325 Pa, or the same as 1013.25 millibars, 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.
If the air pressure at sea level is 1,014 mbar, what would you expect would happen to the air pressure in a hole that is dug 1,000 feet below ground?
"451.5415 psi"
14.7 psi + 1000*(0.445 psi) = 451.5415 psi
As we descend in the atmosphere, there is a greater mass of atmosphere above us, hence it is predicted that the pressure will rise.
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a mole of LiF(s) contains 2 moles of ions
1 mole of LiF has 2 moles of ions. Therefore, the given statement is true.
1 mole of LiF (s) contains 1 mole of [tex]Li^+[/tex] ion and 1 mole of [tex]F^-[/tex] ion.
So, total 2 moles of ions are present.
One fluorine (F) atom and one lithium (Li) atom can interact to produce the chemical compound Lithium Fluoride, or LiF.
LiF is an inorganic substance. It is a colorless solid that becomes white as the size of the crystals decreases. Lithium fluoride doesn't have an odor, but it tastes salty and unpleasant. Although it has a structure similar to sodium chloride, it is substantially less soluble in water. This is mostly due to LiF's stronger ionic nature. The ratio of lattice energy to hydration energy determines a compound's solubility in water.
Thus, the statement is true.
The complete question is:
A mole of LiF(s) contains 2 moles of ions. State whether the statement is true or false.
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A
Which of the following is
the correct way to express
1.37 in scientific notation?
1.37 x 10-1
B
1.37 x 10⁰
1.37 x 101
[tex] \huge \mathbb{\pink{\fbox{\blue{\underline{\green{ANSWER}}}}}} \\ \\ \tt (a) \: 1.37 \times 10 {}^{ 0} [/tex]
If 70 moles of CH4 reacted with excess O2, how many grams of H2O are formed? CH4 (g) + 2 O2 (g) -------> CO2 (g) + 2 H2O (g)
The mass (in grams) of H₂O produced from the reaction is 2520 grams
How to determine the mass of H₂O producedWe'll begin by writing the balance equation for the reaction. This is given below:
CH₄(g) + 2O₂(g) -------> CO₂(g) + 2H₂O(g)
From the balanced equation above,
1 mole of CH₄ reacted to produce 2 moles of H₂O
Therefore,
70 moles of CH₄ will react to produce = 70 × 2 = 140 moles of H₂O
Finally, we shall determine the mass of water, H₂O produced from the reaction as follow:
Mole of water, H₂O = 140 molesMolar mass of water, H₂O = 18 g/molMass of water, H₂O =?Mole = mass / molar mass
Cross multiply
Mass = mole × molar mass
Mass of water, H₂O = 140 × 18
Mass of water, H₂O = 2520 grams
Thus, 2520 grams of water, H₂O were obtained from the reaction
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Roderick tries to pick
lock by straightening a
paper clip chemical or physical
Answer:
physical
Explanation:
theres nothing really going on w the paper clip ur just bending it
Help me out
Question 1: Do heavy metals like lead and arsenic cause damage to human DNA?
Question 2: Should industries releasing heavy metals into land and water ecosystems be penalized?
Heavy metals such lead and arsenic does cause damage to human DNA.
Industries which release heavy metals into land and water ecosystems should be penalized.
However, the exposure of these heavy metals damage the body due to the by inhibiting proteins in DNA pathways during repairs.
What are the effects of exposure on heavy metals?The side or adverse effects of exposure of heavy metals have great risk to the well being of humans. Among these effects are as follows:
It causes certain disorders in the nervous system of humansIt affects the respiratory systemIt affects the circulatory systemSo therefore, heavy metals such lead and arsenic does cause damage to human DNA.
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