Answer:
0.1mole
Explanation:
Given parameters:
Pressure = 0.0884atm
Temperature = 6°C = 6 + 273 = 279K
Volume occupied = 26.5L
Unknown:
Number of moles = ?
Solution:
To solve this problem, we are going to use the ideal gas equation:
PV = nRT
P is the pressure
V is the volume
n is the number of moles
R is the gas constant = 0.082atmLmol⁻¹k⁻¹
T is the temperature.
Insert the parameters and solve for n;
0.084 x 26.5 = n x 0.082 x 279
n = 0.1mole
Turning on your X-Box is an example of___ energy turning into ___ energy.
A.electrical,nuclear
B.nuclear,sound
C.electrical,light
D.electrical,chemical
Answer:
electrical --> light
Explanation:
How many moles are in 1.204x10^24 atoms of a gas?
Please help!
1.999 mol gas
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
1.204 × 10²⁴ atoms gas
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 1.204 \cdot 10^{24} \ atoms \ gas(\frac{1 \ mol \ gas}{6.022 \cdot 10^{23} \ atoms \ gas})[/tex]Multiply/Divide: [tex]\displaystyle 1.99934 \ moles \ gas[/tex]Step 4: Check
Follow sig fig rules and round. We are given 4 sig figs.
1.99934 mol gas ≈ 1.999 mol gas
What are the two elements that are liquids at freezing?
Answer:
I belive 2 of them are Bromine and Mercury there are more then just 2 but im not the best at science sorry.
Explanation:
Fluorine gas reacts violently with water to produce hydrogen fluoride and ozone according to the following unbalanced equation. How many moles of o, are created assuming STP conditions are in effect, given 1.88 moles of fluorine gas were
used?
__F2+__H20—__HF+__03
Answer:
Fluorine gas reacts violently with water to produce hydrogen fluoride and ozone according to the following unbalanced equation. How many moles of o, are created assuming STP conditions are in effect, given
Explanation:
3
The four planets closest to the sun that are mostly made of rock and metal
Answer:
Mercury, Venus, Earth and Mars.
Explanation:
Why do you think the different heating process result in different softness or hardness of the steel? Think about what steel is made of and how the atoms move .
Explanation:
Different heating process affect the microstructure of the steel in different ways. Thus, imparting different properties to the steel. For example, annealing is done is done to impart softness to steel, hardening is done to hardened the steel( eg: carburizing, nitriding, cyaniding) whereas tempering is done to improve the ductility of the steel.
Steel mainly contains iron and carbon. This percentage of carbon and iron decides the property of the steel. It is the % of carbon which is altered in different heating process that to obtained the desire microstructure in steel.
how many element are there on the periodic table?
Answer:118
Explanation: it’s right
Answer:
118 elements
Hope that helps
Lidia sets an empty metal pot on a hot stove burner. Which diagram best shows how heat from the burner will flow through the metal of the pot?
Answer:
The pan on the bottom right with the arrows pointing up.
Explanation:
conduction is the transfer of heat through touching surfaces, so when you place the pan on a hot stove, the heat heats up the bottom of the pan, and then the water in it.
The transfer of energy between systems through work is the expansion of gas in a steam engine. Therefore, the second diagram in the second row shows the correct direction of flow of heat.
What is energy transfer in thermodynamics?
Energy transfer is a phenomenon in which energy transfer from one matter to another matter. Energy can be transferred in two forms that are by doing work or by transferring heat.
Heat can be transferred by three ways conduction, convention and radiation. In conduction, when two object are in direct contact, transfer of molecules takes place. When heat flow through touching surfaces is called conduction. Heat flows in the upward direction from bottom in a pan.
Therefore, the second diagram in the second row shows the correct direction of flow of heat.
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Please help I’ll give brainlist
Answer:
A or B they do it for different reasons.
Explanation:
Please help I’ll put u Brainlyiest.
Answer:
it should be the stamen but to be sure look up the structure of a flower
Which of the following is an example of a chemical change?
Answers
A. Boiling water
B. Burning paper
C. Dissolving sugar in water
D. Melting gold
Answer:
Dissolving sugar in water, burning paper, and melting gold are all chemical changes
Explanation:
The action cannot be reversed, or undone. Therefore it is a chemical change.
Boiling water is a physical change.
What percent of I-125 has decayed if there are 37.5g of the original sample left?
Answer:
[(x-37.5)/x]*100%
62.5% (assuming the original sample weighs 100.0g)
Explanation:
Let's say that the original sample is x
Mass of I-125 which has decayed: x-37.5
Percentage of decayed mass: [(x-37.5)/x]*100%
Please recheck, for this may not be the correct answer
which atom has the smallest radius? Sr or I
Answer: Strontium has 219 pm
Iodine has 115 pm
Explanation: So the answer is Sr-Strontium
a chemical reaction produces 3.81g potassium chloride (KCl). How many formula units of potassium chloride are there? *Find Molar Mass of KCl*
Answer is 3.08 E 22 formula units, but I need the work shown
Answer:
The number of formula units in 3.81 g of potassium chloride (KCl) is approximately 3.08 × 10²²
Explanation:
The given parameters is as follows;
The mass of potassium chloride produced in the chemical reaction (KCl) = 3.81 g
The required information = The number of formula units of potassium chloride (KCl)
The Molar Mass of KCl = 74.5513 g/mol
[tex]The \ number \ of \ moles \ of \ a \ substance, n = \dfrac{The \ mass \ of \ the substance}{The \ Molar \ Mass \ of \ the \ substance}[/tex]
Therefore, we have;
[tex]The \ number \ of \ moles \ of \ KCl= \dfrac{3.81 \ g}{74.5513 \ g/mol} \approx 0.051106 \ moles[/tex]
1 mole of a substance, contains Avogadro's number (6.022 × 10²³) of formula units
Therefore;
0.051106 moles of KCl contains 0.051106 × 6.022 × 10²³ ≈ 3.077588 × 10²² formula units
From which we have, the number of formula units in 3.81 g of potassium chloride (KCl) ≈ 3.08 × 10²² formula units.
The number of formula units in 3.81 g of potassium chloride (KCl) is approximately 3.08 × 10²²
Given:
Mass of KCl= 3.81 g
To find:
Formula units of KCl=?
Molar Mass of KCl = 74.55 g/mol
So, substituting the values in order to calculate number of moles
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} \\\\\text{Number of moles}=\frac{3.81}{74.55} \\\\\text{Number of moles}=0.051 \text{ moles}[/tex]
1 mole of a substance = Avogadro's number (6.022 × 10²³) of formula units
Thus, 0.051 moles of KCl will contain
[tex]0.051106 * 6.022 * 10^{23} =3.077588 * 10^{22} \text{ formula units}[/tex]
→The number of formula units in 3.81 g of potassium chloride (KCl)
= 3.08 × 10²² formula units.
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Gravity is the force that pulls things down to the earth. Which of these
parts of the water cycle is helped by gravity?
Answer:
precipitation
Explanation:
gravity pulls down rain
Differentiate between worldwide conservation and national conservation policy.
What type of system is impacting weather in Houston?
A) High pressure
B) Low pressure
C) Warm pressure
D) Cold pressure
Answer:
a) high pressure
that is the answer i got, but wait for a few more answers before you write the answer
3. Count the number of hydrogen atoms in 2 molecules of vitamin C (2c6H8O6
Please help me
There are many different renewable resources available in Florida. Which of the following can be described as a renewable resource?
im in class rn real school help
Answer:
Weathering involves the use of water and or wind to wear down the environment. The sand dunes were most likely carried by wind to form them and form its shape. Erosion most likely took away parts of the sand to make the sand dune. Deposition most likely deposited sand to the area.
Explanation:
If you possibly want a better explanation, try looking it up :).
#teamtrees #WAP (Water And Plant)
this is just to make sure but plz help
All changes saved
A gas is at 275 K, and its temperature is raised to 400 K. The volume is measured at 5.82 L after the gas is heated. What is
the volume of the gas before it is heated?
8.25 L
12.0L
2.00 L
4.00 L
Answer:
4.00L
Explanation:
Using Charle's law, which have the following equation:
V1/T1 = V2/T2
Where;
V1 = initial volume (litres)
T1 = initial temperature (Kelvin)
V2 = final volume (litres)
T2 = final temperature (Kelvin)
According to the information provided, T1 = 275K, T2 = 400K, V1 = ?, V2 = 5.82L
Hence, using the formula;
V1/275 = 5.82/400
400 × V1 = 275 × 5.82
400V1 = 1600.5
V1 = 1600.5 ÷ 400
V1 = 4.001
Therefore, volume of the gas before it is heated is 4.00L
Which element has the following complete electron configuration : 1s22s22p63s23p64s23d5?
Answer:
Manganese
Explanation:
The electronic configuration of the atom is:
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
The powers in this configuration is the number of electrons in each orbital:
2 + 2 + 6 + 2 + 6 + 2 + 5 = 25
The compound has 25 electrons and it is Manganese
The electron configuration 1s22s22p63s23p64s23d5 corresponds to the element manganese (Mn).
In the electron configuration provided:
1s2 represents the filling of the 1s subshell with two electrons.
2s2 represents the filling of the 2s subshell with two electrons.
2p6 represents the filling of the 2p subshell with six electrons.
3s2 represents the filling of the 3s subshell with two electrons.
3p6 represents the filling of the 3p subshell with six electrons.
4s2 represents the filling of the 4s subshell with two electrons.
3d5 represents the filling of the 3d subshell with five electrons.
Based on this electron configuration, we can correctly identify the element as manganese (Mn), which has an atomic number of 25.
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Which statement describes a digital signal used to store information
Answer:
it is 1,4
Explanation:
Just took the test hope you get it right. c:
Answer:
It is made of numbers
Explanation:
Found the hard way.
27 grams of Silver was reacted with excess sulfur, according to the following equation:
2Ag+S ---> Ag2S
25 grams of silver sulfide was collected, what is the the theoretical yield, actual yield, and percent yield? Please explain or show your work, it'll really help.
Answer:
percent yield = 80.7%
Theoretical yield of silver sulfide = 30.975 g
Actual yield = 25 g
Explanation:
Given data:
Mass of silver = 27 g
Mass of silver sulfide formed = 25 g
Theoretical yield of silver sulfide = ?
Actual yield = ?
Percent yield = ?
Solution:
Chemical equation:
2Ag + S → Ag₂S
Number of moles of Ag:
Number of moles = mass/molar mass
Molar mass of silver = 107.8 g/mol
Number of moles = 27 g/ 107.8 g/mol
Number of moles = 0.25 mol
Now we will compare the moles of silver with silver sulfide.
Ag : Ag₂S
2 : 1
0.25 : 1/2×0.25 = 0.125 mol
Theoretical yield of silver sulfide:
Mass = number of moles × molar mass
Mass = 0.125 mol × 247.8 g/mol
Mass = 30.975 g
Actual yield is given in question = 25 g
Percent yield:
Percent yield = (actual yield / theoretical yield) × 100
Percent yield = (25 g/ 30.975 g ) × 100
percent yield = 80.7%
Pls help me use the graph to answer the questions
Answer:
The first question is option 2
and the second question in option 1
Explanation:
I traveled for 0.5 hr at 80 km/h. How far did I travel?
Answer:
[tex]Distance = 40km[/tex]
Explanation:
Given
[tex]Speed = 80km/hr[/tex]
[tex]Time = 0.5hr[/tex]
Required
Determine the distance covered
Distance is calculated as:
[tex]Distance = Speed * Time[/tex]
Substitute values for Speed and Time
[tex]Distance = 80km/hr * 0.5hr[/tex]
[tex]Distance = 80km * 0.5[/tex]
[tex]Distance = 40km[/tex]
Hence, you travelled 40km
How many atoms of Oxygen are in 2.35 grams of SO2?
Answer:
There are 2 atoms of Oxygen (O) present in SO2 therefore it's atomicity is 2
how do you classify the society on the basis of economy write one characteristic of any two of them
Answer:
Explanation:
(1) The primary industry is mainly agriculture, which includes agricultural, forestry, animal husbandry and fishery components. Agriculture is the foundation of social economy. (2) The secondary industry, which mainly includes the industrial and construction industries.
Which of the following is the balanced equation for the synthesis of sulfuric acid (H2SO4)?
a. SO3 + 2HO> 2H2SO4
b. SO3 + H2O> H2SO4
c. SO3 + H2O> H2SO4 + SO2
d. SO3 + H2O> H2S + H2SO4
help please
Answer:
b
Explanation:
The balanced equation for the synthesis of sulfuric acid is SO₃ + H₂O → H₂SO₄.
What is balanced equation?Those chemical reactions in which amount of species are present in equal amount on left side as well as on right side of the chemical reaction.
Sulphuric acid is formed by the combination of water with the sulphur trioxide, chemically it is represented as:
SO₃ + H₂O → H₂SO₄
Above reaction is balanced as each element is present in same amount on both side.
Hence, option (b) is correct.
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