Answer:
a. Response factor is 0.1775
b. 11.7mM of X in the original unknown
c. 5.85mM is the concentration of X in the diluted solution
Explanation:
a. The equation to find response factor is:
F = AreaX*[S] / AreaS*[X]
Where Area of X our sample and S the internal standard whereas [] represent the concentration of each one.
Replacing:
F = 3497*1.72mM / 9997*3.39mM
F = 0.1775
c. The concentration of S is:
8.47mM * 1.00mL / 10.0mL = 0.847mM
Replacing:
0.1775 = 5428*0.847mM / 4431*[X]
[X] = 5.85mM is the concentration of X in the diluted solution
b. The concentration of X in the original unknown is:
5.85mM * (10.0mL / 5.00mL) =
11.7mM of X in the original unknown
A 1500 L weather balloon is at 'a temperature of 290 K on the ground. As it rises the
temperature drops. At 15,000 ft, the temperature is down to 210 K. What is the
volume at this elevation?
Answer:
1086.2 L
Explanation:
The computation of the volume of the elevation is given below:
Here we assume the volume of the elevation be x
As we know that
V¹ ÷ T¹ = V² ÷ T²
Here
V^1 = 1500
T^1 = 290
V^2 = x
T^2 = 210
Now place these values to the above formula
So,
1500 ÷ 290 = x ÷ 210
x = 1086.2 L
An atom of carbon and an atom of element Z together have a mass of 6 amu less than double
the mass of an atom of oxygen. If an atom of oxygen has a mass of 16 amu and the mass of an
atom of carbon is 12 amu, what is the mass of an atom of element Z?
The mass of an atom of element Z is 4 amu. This can be determined by subtracting the mass of an atom of carbon (12 amu) and an atom of oxygen (16 amu) from double the mass of an atom of oxygen (32 amu). 32 amu - 12 amu - 16 amu = 4 amu.
What is atom of carbon?An atom of carbon is a basic building block of all organic materials. It is the 6th element in the periodic table and has an atomic number of 6. Carbon atoms have 6 protons and 6 neutrons, and have a valence of 4. This means that carbon atoms can form four bonds with other atoms. Carbon is the basis of all life on Earth, as it is essential for the formation of proteins, fatty acids, and other molecules necessary for life. Carbon atoms have the ability to form a wide variety of molecules with different properties, which makes them highly versatile and important in many different fields, such as medicine and engineering. Carbon is a non-metal, but can behave like a metal in certain circumstances. It is also the basis of the fossil fuels that power our society.
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James decided to do an experiment with a can of soda. He opened a 340 g can of soda and left it open for a day. The next day, he
measured the soda can again and found it was 332 g. Which statement below best explains why the masses were different?
A. The can was open and gases were released.
B. The can was a unopen and gases were released.
C. A mistake was made and the experiment should be conducted again because the Law of Conservation of Mass was violated.
D. A mistake was made in measuring the mass of the can.
Answer:
A - The can was open and gases were released.
is the enthalpy change when 1 mole of a substance undergoes complete
combustion under standard conditions.
Answer:
Explanation:
Standard enthalpy of combustion (ΔH∘C) is the enthalpy change when 1 mole of a substance burns under standard state conditions;
The current is the same everywhere in a parallel circuit True or false why
A sample of an unknown gas has a mass of 0.116 g. It occupies a volume of 25.0 mL at a temperature of 127°C and has a pressure of 155.3 kPa. Calculate the molar mass of the gas.
Answer:
The molar mass of the gas is 99.4 g/mol
Explanation:
Ideal gas law PV=nRT. P=155.3 T=127+273= 400K V=25.0 Gas constant=8.314 Now substiture the values into the equation n=PV/RT
n= (155.5kPa x 25.0mL x 1l/1000mL)/ 8.312l*KPa/mol*K x 400K
n= 0.001167 mol
Molar mass= Mass/ Number of moles
= 0.116g /0.001167 mol
= 99.4 g/mol
how many moles of Hcl can be produced from 1.21 moles of zn?
Answer:
2 moles
Explanation:
What are the similarities and differences between ionic and covalent bonds?
Answer:
Explanation:
Similarities.
Both Ionic and covalents bond produce exothermic reactions.
They are both neutral.in Ionic bonds, the two opposite charge will terminate each other and in covalent, the neutral molecules tend to share electrons.
Difference
Ionic bonds have high polarity while covalent have low.
Ionic bonds have no definite shape, covalent have.
Ionic have high melting points, covalent have low.
Io ic have high boiling point, covalents have low.
What is the molarity of 2.5 moles of NaOH in a 2.6L solution
Answer:
Molarity =Moles of solute/Volume of Solution (L)
Molarity=2.5/2.6
=0.962M
Please help. Will give brainliest
Answer:
the answer to this is 71.0 grams of chlorine
Please help me fill in the blanks
Electrons first occupy the position in lowest possible energy.
orbital diagrams:-
The higher the energy level, the Third energy the electrons in that level have. On the orbital diagram, fill in the boxes to label the representations of an orbital and a sublevel. 2 electrons can occupy a single orbital, and these electrons have Opposite spin. Within a sublevel, all the orbitals fill with one electron, each of which has the Positive spin before a second electron fills any of the orbitals.
what is Orbital?
Each energy position is made up of areas known as an orbital. An orbital is an area of probability in which electrons can be set up. Each energy position, except for the first, has further than one orbital. Each orbital has a specific shape.
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Using the balanced equation
how many
3Ba+Al2(SO4)3-->2Al+3BaSO4,
grams of aluminum will be produced if 1.0 g of Ba react with 1.80 g of
Al2(SO4)3?
O.14
0.26
0.28
O.13
Grams of aluminum that will be produced if 1.0 g of Ba react with 1.80 g of Al2(SO4)3 will be 0.28g Al. Hence option c) is correct.
What is balanced equation?A balanced equation is a chemical equation where mass is conserved and there are equal numbers of atoms of each elements on both the sides of equation.
Given, 1.80 g of Al2(SO4)3 and 1.0 g of Ba
So, (1.8 g)/(341.96 g) = 0.00526 moles of Al2(SO4)3
And, 1 mole = 341.96g Al2(SO4)3
Now, (0.00526 moles of Al2(SO4)3)*(2 moles of Al)
= 0.01052 moles of Al
So, (0.01052 moles of Al)*(27 grams of Al)
= 0.28g Al
Hence, option c is correct.
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True or false stars will eventually burn out causing the universe become cold and dark
what is POH of a solution containing hydrogen ion concentration of 0.008
Given-
Hydrogen ion concentration pH = 0.008
Now,
we know that pH + pOH = 14
pOH = 14-0.008
pOH = 13.992
A relationship that decreases the dependent variable when the independent variable increases is called __________________
molecule of the variables shift in the opposite directions when there is a inverse or negative relationship. In other words, the dependent variable grows if the value of the independent variable falls.
What is the name of the correlation here between dependent and independent variables?The dependent variable in this study are often the effect and the variable are the cause in a research investigation. Additionally, one could say that there is a cause-and- effect link between the independent and the dependent variables.
What kind of link does there exist between these two variables?A statistical method known as correlation is used to quantify and explain a link between two variables. The two factors are often just observed, not changed. Two scores from identical people must be used for the correlation
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if 71.1 moles of CO2 react with H2, how many moles of H2O are produced
Answer:
71.1 mol CO2 ( 1 mol CH4 / 1 mol CO2 ) = 71.1 mol CH4 produced
Explanation:
Answer:
142.2 mol H2O
Explanation:
The chemical reaction is
4H2 + CO2 ---> CH4 + 2H2O
71.1 mol CO2 × (2 mol H2O / 1 mol CO2)
= 142.2 mol CO2
waves in a lake are 5.00m in length and pass an anchored boat 1.25 s apart. the speed of the waves is:
a. 0.25 m/s
b. 4.00 m/s
C. 6.25 m/s
d. 3 × 108 m/s
Answer:
b. 4.00 m/s
Explanation:
divide the waves by the time
5÷1.25=4
In the next set of boxes, enter the mass number and atomic number of the alpha particle,
which has the same composition as the nucleus of a helium (He) atom. After filling in the
boxes in the Gizmo, what is the atomic mass of the first element?
New mass number
238
U
+
92
New atomic number
Answer:
234
Explanation:
From the question given above, the following data were obtained:
Alpha particle => ⁴₂He
²³⁸₉₂U —> ? + ⁴₂He
Let the unknown be ⁿₓZ. Thus, the equation becomes
²³⁸₉₂U —> ⁿₓZ + ⁴₂He
Next, we shall determine x, y and Z. This can be obtained as follow:
92 = x + 2
Collect like terms
92 – 2 = x
90 = x
x = 90
238 = n + 4
Collect like terms
238 – 4 = n
234 = n
n = 234
ⁿₓZ => ²³⁴₉₀Z => ²³⁴₉₀Th
Thus the balanced equation
²³⁸₉₂U —> ²³⁴₉₀Th + ⁴₂He
Therefore, the atomic mass of the first element is 234
Answer:
A: 234
B: 90
C: Th
D: 4
E: 2
F: He
Thank You!
Formula
RnF3+
(2) Lewis dot structure
Formation of RnF₃⁺ will nat takes place easily or if it is form then it will decompose easily.
What is the Lewis dot structure?Lewis dot structure of any compound tells about the bonding and outermost electrons present in all the entities present in that compound.
Radon is a noble gas atom and have stable electronic configuration, but still they form radon flouride products due to the high electronegativity of flourine it attracts the lone pair of electrons of radon.
For the formation of compound promotion of 1, 2 or 3 electrons from the 6p orbital to the vaccant 6d orbitals will give rise to 2, 4 or half filled orbitals so they will form only products with odd number of atoms.
Hence RnF₃⁺ will not form any compound.
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How many of each type of atom should react so that the electrons
lost will equal the electrons gained?
Explanation:
ni suna ham naHow many of each type of atom should react so that the electrons
lost will equal the electrons gained?
Please help!!
See attachment
In KClO3, the proportions of K, Cl, and O are 31.9%, 28.9%, and 39.1%, respectively.
KClO3: Is it an acid or a base?There are three ways to define bases and acids. A strong base and a strong acid, respectively, called KOH K O H and HClO3 H C l O 3, react to form KClO3 K C l O 3, a salt.
Who or what is KClO3?A powerful oxidising agent with several applications is potassium chlorate (KClO3). It is or has formerly been a part of fireworks, explosives, safety matches, and disinfectants. The disproportionation of sodium hypochlorite results in the formation of sodium chloride and sodium chlorate initially.
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What is the formula for calculating kinetic energy?
KE= 1/2mv²
KE=2mv²
KE=1/2m²v
KE=2m²v
Answer:
The formula for kinetic energy is KE= 1/2mv²
Explanation:
Hope it helps you
PLS RATE AS BRAINLIEST ANSWER
A fluid flowing in a pipe has 1.05 in diameter. If the fluid has density, viscosity and
volumetric flow rate are 62.3 , 1.2 cP and 35 gpm respectively. Calculate: 3
a) The velocity.
b) Reynolds number ()
[2]- Find the following
a) Drive an expression to find a pressure of methane gas at point B b) If the temperature of methane is 100 F, Calculate pressure of
methane gas at point B.
c) Calculate pressure of oil at point C.
PA = 1, 000 psig
[3]- If the water is pumped down one well and the displaced oil which flows up through well exit (see the fig below), drive an expression to find a pressure of inlet water Pw needed to displace oil when the water/oil interfacial tension σ is applied.
Velocity is a vector quantity that describes the rate and direction of an object's motion.
a) The velocity of the fluid:
V = 35 gpm / (π * (1.05 in)^2 / 4) = 7.09 ft/s
b) Reynolds number:
Re = (62.3 lbm/ft^3 * 7.09 ft/s * 1.05 in) / (1.2 cP) = 4,211.9
[2]- a) Expression to find pressure of methane gas at point B:
PB = PA + rgh
b) Pressure of methane gas at point B:
PB = 1,000 psig + (0.072 lbm/ft^3 * 32.2 ft * 0.0689 psia/ft) = 1,233.5 psig
c) Pressure of oil at point C:
PC = PB - 0.433 psia/ft * 32.2 ft = 1,093.3 psig
[3]- Expression to find pressure of inlet water Pw needed to displace oil:
Pw = PC + (σ / r) * (h2 - h1)
Pw = 1,093.3 psig + (σ / 0.072 lbm/ft^3) * (32.2 ft - 0 ft) = 1,093.3 psig + (σ / 0.072 lbm/ft^3) * 32.2 ft.
What is velocity?
Velocity is a vector quantity that describes the rate and direction of an object's motion. It is commonly represented by the symbol 'v' and is measured in meters per second (m/s). Velocity includes both the speed and the direction of the object. For example, if an object is moving north at 10 m/s, its velocity would be 10 m/s north. Velocity can also be determined by taking the derivative of the position function with respect to time.
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Which is considered a fruit?
acorn
squash
orange
beet
carrot
Answer:
an orange would be considered a fruit
Explanation:
fruits have seeds while vegetables do not
Alkaline water 8.0, Fruit juice 6.8, Gatorade 3.0, Green tea 9.0, Gatorade 3.0, Vinegar 3.5,
a. Organize this list of foods with pH from most basic to most acidic.-
Answer: See explanation
Explanation:
The pH scale is used to measures how acidic an object is. It should be noted that the objects that are basic aren't very acidic. The most acidic has values of 0 while the most basic has value of 14, 7 is known to be neutral.
Therefore, list of foods with pH from most basic to most acidic will be:
Green tea 9.0,
Alkaline water 8.0
Fruit juice 6.8
Vinegar 3.5,
Gatorade 3.0
Is this line real or imaginary?
Answer:
imaginary because i see no line.
Explanation:
Looking at the web above, each letter represents a species of animal in an ecosystem food web. Which of the following is most likely to cause the greatest decrease in the species B population.
A decrease in species C
A decrease in species E
A decrease in species D
A decrease in species A
Answer:
a decrease in species A is correct answers
when might the BAC of a dead body be misleading or unhelpful
Answer: Blood alcohol levels at autopsy are valid up to 48 hours after death when simple principles are observed in the collection and storage of samples. Alcohol levels in samples of blood taken from the intact heart are as significant as levels of blood from the femoral veins.
Explanation:
Answer:
If the victim was submerged in water
Explanation:
Rifampin has a long aliphatic chain forming a bridge between an aromatic moiety (naphthaline).
a. True
b. False
Answer:
True
Explanation:
Question - Rifampin has a long aliphatic chain forming a bridge between an aromatic moiety (naphthaline).
Solution -
It is a true statement.
So,
The correct option is - True.
Reason -
Rifampin has a long aliphatic chain forming a bridge between an aromatic moiety (naphthaline)
Calculate the mass of compound (molar mass = 256 g [tex] mol {}^{-1} [/tex] ) to be dissolved in 75g of benzene to lower its freezing point by 0.48K
( [tex]K _{f} = 5.12 \: K \: \: kg \: mol { }^{ - 1} [/tex] )
thankyou.
The mass of the compound is calculated by freezing point depression formula which is ΔTf=Kf×W₂×1000/M₂×W₁ which is equal to 3125 g.
What is a compound?Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.
Freezing point depression is calculated by the formula, ΔTf=Kf×W₂×1000/M₂×W₁ .Therefore,W₁=5.12×75×1000/0.48×256=3125 g.
Thus, mass of compound is 3125 g.
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