Is uranium a mixture or pure substance
Answers
Answer: is a pure substance
Explanation:
Related Questions
Convert 3.5mol of CO2 to grams.
Answers
Suppose that money is deposited daily into a savings account at an annual rate of $20,000. If the account pays 5% interest compounded continuously, estimate the balance in the account at the end of 6 years. CAS The approximate balance in the account is 5 (Round to the nearest dollar as needed)
Answers
The approximate balance in the account at the end of 6 years is $159,074. Rounded to the nearest dollar, it is $159,074.
Assuming that the annual rate of $20,000 is deposited at the beginning of each year, the total amount deposited over 6 years would be $120,000. With continuous compounding at 5% interest rate, the formula to calculate the balance in the account after 6 years is:
A = Pe^(rt)
Where A is the balance, P is the principal (amount deposited), e is the mathematical constant approximately equal to 2.71828, r is the interest rate in decimal form, and t is the time in years.
Plugging in the values, we get:
A = $120,000e^(0.05*6)
A = $159,073.51
Therefore, the approximate balance in the account at the end of 6 years is $159,074. Rounded to the nearest dollar, it is $159,074.
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what does table salt mean
Answers
Salt suitable for sprinkling on food at meals.
Pt3 science......
Select correct answer ♡ !
Answers
Answer:
Neon
(if you want a thorough explanaion, just ask for one)
It is C! <3
The reason it's C because pt3 is Sugar science name get it?
cyclohexanol has a vapor pressure of 10.0 mmhg at 56.0 °c, and 100.0 mmhg at 103.7 °c. calculate its enthalpy of vaporization, δvaph. give you answer in kj/mol.
Answers
The enthalpy of vaporization for cyclohexanol is approximately 41.51 kJ/mol.
To calculate the enthalpy of vaporization (ΔvapH) for cyclohexanol, you can use the Clausius-Clapeyron equation:
ln(P1/P2) = (ΔvapH/R)(1/T2 - 1/T1)
Where P1 and P2 are the vapor pressures at temperatures T1 and T2 (in Kelvin), R is the gas constant (8.314 J/mol·K), and ΔvapH is the enthalpy of vaporization.
Given values:
P1 = 10.0 mmHg at T1 = 56.0 °C = 329.15 K
P2 = 100.0 mmHg at T2 = 103.7 °C = 376.85 K
Plugging the values in;
ln(P1/P2) = ln(10/100)
= ln(0.1)
= -2.303
Now, plug the values into the equation:
-2.303 = (ΔvapH/8.314)(1/376.85 - 1/329.15)
Solve for Δvap H:
ΔvapH = -2.303 * 8.314 / (1/376.85 - 1/329.15) ≈ 41,507 J/mol
Convert to kJ/mol:
Δvap H ≈ 41.51 kJ/mol
Therefore, the enthalpy of vaporization for cyclohexanol is approximately 41.51 kJ/mol.
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Calculate the molarity of 0.5 moles NaHCO3
in 5,314 mL of solution.
How do I solve this?
Answers
Answer: 0.094 M
Explanation:
Diastolic Blood Pressure of Females For the diastolic blood pressure measurements of females listed in Data Set 1 "Body Data" in Appendix B, the highest measurement is 98 mmHg. The 147 diastolic blood pressure measurements of females have a mean of
x
ˉ
=70.2 mmHg and a standard deviation of s=11.2 mmHg. a. What is the difference between the highest diastolic blood pressure and the mean of the diastolic blood pressures for females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the highest diastolic blood pressure to a z score. d. Using the criteria summarized in Figure 3-6 on page 123, is the highest blood pressure significantly low, significantly high, or neither?
Answers
The mean of the diastolic blood pressures for females is 98 - 70.2 = 27.8 mmHg. The highest diastolic blood pressure is significantly high.
a. The difference between the highest diastolic blood pressure and the mean of the diastolic blood pressures for females is 98 - 70.2 = 27.8 mmHg.
b. The difference found in part (a) is 27.8 mmHg, and the number of standard deviations is 27.8/11.2 ≈ 2.48.c. To convert the highest diastolic blood pressure to a z score, we use the formula:z = (x - µ)/σ,where x is the value, µ is the mean, and σ is the standard deviation.z = (98 - 70.2)/11.2 ≈ 2.48d. Using the criteria summarized in Figure 3-6 on page 123, a z score of 2.48 is significantly high. Therefore, the highest diastolic blood pressure is significantly high.
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PLEASE! I HAVE 20 MINS LEFT :( Two aqueous solutions of AgNO3 and NaCl are mixed. Which of the following diagrams best represents the mixture? For simplicity, water molecules are not shown (Ag + = gray, Cl- = orange, Na + = green, NO ^ - 3 = blue) PLEASE I NEED HELP I ONLY HAVE 15 MINS PLS :'((
Answers
Answer:
diagram C best represents the mixture
How many grams are in 1.52 moles of PC13? (molar mass: 137.33 g/mol)
Answers
Iron is obtained commercially by the reaction of hematite
(Fe2O3) with carbon monoxide. How many grams of iron is produced when 25.0 mol of hematite reacts with 30.0 mol of carbon monoxide? Fe2O3(s) + 3 CO(g) 2 Fe(s) + 3 CO2(g)
Answers
Answer:
lAs can be seen from the chemical equation, each mole of
F
e
2
C
O
3
needs 3 moles of
C
O
. If 30 moles of
C
O
are used, only 10 moles of
F
e
2
C
O
3
can be reduced, generating 20 moles of
F
e
, corresponding to 1117 grams of iron.
what happens when there is more kinetic energy?
Answers
Energy that a moving object has due to its motion is Kinetic Energy. Kinetic Energy: ... The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.
Answer:
when there is more kinetic energy the objects moves fast...
A student creates the Beer's Law plot for Part 3 and finds the slope to be 3. 5 ✕ 103. In Part 4, the solution prepared by mixing 5. 0 mL of 2. 0 ✕ 10−3 M NaSCN with 5. 0 mL of 2. 0 ✕ 10−3 M Fe(NO3)3 shows an absorbance of 0. 700.
(a) Calculate the equilibrium concentrations of Fe3+, SCN−, and FeSCN2+.
[Fe3+ ] ___ M
[SCN− ] ___ M
[FeSCN2+ ] ___ M
(b) Calculate Keq.
_____
Answers
To solve this problem, we'll use the Beer-Lambert Law and the information given.
(a) According to the Beer-Lambert Law, the absorbance (A) is directly proportional to the concentration (c) of the absorbing species:
A = εlc
where A is the absorbance, ε is the molar absorptivity constant, l is the path length (in cm), and c is the concentration (in M).
Given:
Slope of the Beer's Law plot (εl) = 3.5 × \(10^3\)
Absorbance (A) = 0.700
Since we have a 1 cm path length, the slope (εl) is equal to the molar absorptivity constant (ε).
Substituting the values into the equation, we can calculate the equilibrium concentrations:
ε = \(3.5*10^3 M^{(-1)} cm^{(-1)}\)
A = 0.700
Using the Beer-Lambert Law equation, we can rearrange it to solve for the concentration (c):
c = A / (εl)
For Fe3+:
c(Fe3+) = A / (εl) = 0.700 / (3.5 × \(10^3\)) = 2 ×\(10^{(-4)}\) M
For SCN-:
c(SCN-) = A / (εl) = 0.700 / (3.5 × \(10^3\)) = 2 × 1\(0^{(-4)}\) M
For FeSCN2+:
Since FeSCN2+ is the product of the reaction between Fe3+ and SCN-, the concentration of FeSCN2+ at equilibrium will be zero until the reaction reaches equilibrium.
Therefore, the equilibrium concentrations are:
[Fe3+] = 2 × \(10^{(-4)}\) M
[SCN-] = 2 × \(10^{(-4)}\) M
[FeSCN2+] = 0 M
(b) To calculate the equilibrium constant (Keq), we'll use the equation:
Keq = ([FeSCN2+]) / ([Fe3+][SCN-])
Substituting the given values:
Keq = (0) / (\((2 * 10^{(-4)})^2\)) = 0
Therefore, Keq is equal to 0.
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A gas at STP has a volume of 37.8 L. If the temperature is raised to 295 K and the pressure is changed to 50.0 kPa, what is the new volume of the gas?
Answers
When a gas at a given temperature and pressure is changed, the new volume of the gas can be calculated using the ideal gas law.
What is the new volume of the gas?The ideal gas law states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature.Given the temperature and pressure of the gas, we can rearrange the ideal gas law to solve for V: V = nRT / P. In this equation, n and R are constants. Since the new temperature and pressure are given, we can calculate the new volume of the gas:V = nRT / PV = (n)(0.08206 L•atm/mol•K)(295 K) / (50.0 kPa)V = 45.49 L Therefore, the new volume of the gas at 295 K and 50.0 kPa is 45.49 L, which is an increase of 7.7 L from the original volume of 37.8 L at STP. This is due to the fact that when the temperature and pressure of a gas are increased, the volume of the gas increases as well.To learn more about the ideal gas law refer to:
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b. 8500°C 600°C d. 3700°C с C 9. Which organic acid is found in apple a. Tannic acid b. Malic acid c) Lactic acid d citric acid
Answers
Answer:
b. Malic Acid
Explanation:
Malic (organic) Acid is found in apple.
GL
i will give the brainliest for who answer this questio but no guessing
Write the common names of group IVA, VIIA and VIII A _____________________ ,
____________________ , _____________________
Answers
Answer:
IVA: nonmetal/other metals VIIA:halogens VIII: Nobel Gases
Explanation:makes sense
Describe the difference
between the smooth
Endoplasmic Reticulum
(ER) and rough
Endoplasmic Reticulum
(ER)
Answers
Answer:
Smooth endoplasmic reticulum (SER) is a type of endoplasmic reticulum consisting of tubular vesicles that lack ribosomes on the outer surface and is involved in the synthesis and storage of lipids. Rough ER has ribosomes on the outer surface. Smooth ER does have riboszomes on the outer surface.
Explanation:
Calculate the amount of heat energy is needed to raise the temperature of 5.00 grams of lead from 25.0 to 35.0 degrees Celsius, if the specific heat capacity of lead is 0.129 J/g/C.
Answers
Answer: 6.45 Joules
Explanation: I just did it
PLZ HELP ME WITH MY WORK
How many different elements are there in the molecule C8H11NO2,?
A. 21
B. 2
c. 11
D. 4
Answers
Answer:
option C 11
is the correct answer
Compare the samples you graphed. Describe the relationship between heat increase and temperature for the samples shown in the table. Would you be able to predict the heat increase needed to get to 60ºC for all of the samples, some of them, or none of them?
Answers
The entire energy of all internal molecular motion makes up an object's heat.The thermal energy or average heat of the molecules in a substance is measured by temperature.It is a measurement of the quantity of atoms times the energy that each atom possesses.
How do heat and temperature relate to one another?
Let's now think about the connection between heat and temperature.The temperature rises as materials are heated.In other words, when a substance receives energy, the molecules that make up that substance move more quickly. The energy that is transferred from a hot object to a cold object is called heat.A measurement of an object's hotness or coolness is its temperature.Both the specific heat equation (Q=mcT Q = m c T) and the latent heat equation (Q=ml Q = m l) relate these two numbers. Meaning that it will require more heat to raise a temperature by one degree the more mass you govern.In contrast, the specific heat capacity would remain constant regardless of the mass used to raise the temperature by one degree Celsius.Heat capacity=mass*specific heat capacity is the relationship between the two. Temperature fluctuations are typically a good indicator of changes in heat.A group of atoms often move more quickly and become hotter when you add energy to them.Similar to this, when energy is removed from a group of atoms, they typically move less and become cooler. Heat is a measure of change, never a quality that an item or system possesses.It is categorized as a process variable as a result.Temperature can be expressed in Celsius (°C), Kelvin (K), Fahrenheit (°F), or Rankine units and describes the average kinetic energy of molecules inside a substance or system (R). The quantity of energy produced as a substance's temperature rises is referred to as heat.The right response is therefore option d, which states that heat is the energy transfer caused by a temperature differential. Heat is exchanged between two objects when their temperatures differ.When the two items reach the same temperature, the cooler object becomes warmer.Always, heat energy moves from a hot object to a cooler object. The average measurement of a substance's heat energy is its temperature.A body's temperature determines how hot or cold it is.The material becomes heated when a body's temperature rises.To learn more about heat and temperature refer
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The law of conservation of mass-energy and the second law of thermodynamics are the same thing?
Answers
Answer:
law of conservation of energy is the 1st law of thermodynamic
Question 14 of 34
for a reaction, ah = 2 kj. for which value of tas is the reaction
spontaneous?
oa. -2 kj
b. 3 kj
oc. 2 kj
od. -3 kj
Answers
Option B is correct answer, when TΔS is 3 KJ the reaction is spontaneous reaction.
What is spontaneous reaction?
A spontaneous process in thermodynamics is one that happens without the system receiving any outside input. The time-evolution of a system in which it releases free energy and transitions to a lower, more thermodynamically stable energy state is a more technical definition (closer to thermodynamic equilibrium). Following the general convention for thermodynamic measurements, the sign convention for changes in free energy is as follows: a release of free energy from the system corresponds to a negative change in the system's free energy and a positive change in the surrounding free energy.
The reaction's spontaneity is determined by the Gibbs Free Energy (ΔG) value.
This value is calculated using the following equation, which depicts the link between temperature, entropy (ΔS), enthalpy (ΔH), and the Gibbs free energy (ΔG):
ΔG = ΔH - T(ΔS)
A positive ΔG value represents a non-spontaneous reaction,
A negative ΔG value represents a spontaneous reaction.
Given ΔH = 2 KJ,
We get ΔG negative only when TΔS is 3 KJ.
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Which of the following would cause entropy to decrease?
Answers
Answer:
B . CO2(g) -----> CO2(l) Entropy canbe decreased only in the cases when liquid is converted to solid and when gas is converted to solid or liquid. The option B is correct.
Answer:
b. CO_2 (g) --> CO_2 (l)
Explanation:
A P E X
Please answer the following question using the data below: H2O vapor content: 13 grams H2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10 ∘
C 52 grams at 30 ∘
C What is the dew point for the conditions listed above? LCL 3π5 25C Relative Humidity =100%
Answers
Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$
Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$
The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.
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In step 3, which of the water drops was the flattest and widest? what does this mean about the attraction of the molecule to the surface?
Answers
The flattest and widest water drop was the one with the highest surface tension, indicating the highest attraction of the molecule to the surface.
This is because the molecules have a stronger cohesive force, which is the force of attraction between the molecules of the same substance, and a higher surface tension, which is the force of attraction between the molecule and the surface. The higher the cohesive force, the more the molecules will be attracted to each other and the higher the surface tension, the more the molecules will be attracted to the surface. Therefore, the flattest and widest water drop indicates the strongest attraction of the molecule to the surface.
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hydroxyl, ether, carbonyl, or amine?
Answers
It represents an amine group.
Explain what a chemical reaction is and moles
Answers
Answer:
A process during which chemical bonds between atoms are broken and new ones are formed, producing one or more substances.
Moles are the amount of substance that contains as many particles.
Explanation:
A chemical reaction is when a chemical change occurs for example when a nail comes into contact with air and is then exposed to air it begins to rust. It forms a red-brown substance which changes the chemical composition of the original compound.
Examples of chemical reactions:
Combustion
Oxidation (rusting)
Cooking an egg
Photosynthesis
Digestion
Fireworks
Paper Burnin
The mole is the amount of substance that contains as many particles (molecules, ions or atoms) as there are in 12g of carbon.
1 mol is the amount of substance that contains the same number of particles as there are atoms in 12.0 g of carbon-12 and that number is referred to as Avogardo's constant (6.022 x \(10^{23}\)).
In the experiment by yoshida and kinosita, fluorescently labeled actin was attached to atp synthase. No atp was added to one preparation, which showed no change over the course of the experiment. Atp was added to a second preparation and the movement of the actin was recorded. Explain what can be concluded from this experiment.
Answers
With this experiment, we can conclude that when ATP synthase binds to ATP and the ATP synthase rotates.
What role does ATP synthase play?Definition of ATP Synthase Adenosine triphosphate (ATP) is produced by the enzyme ATP synthase during the process of cellular respiration. The primary source of energy used by cells is ATP.
What is the name of the enzyme responsible for ATP synthesis?a catalytic enzyme that uses inorganic phosphate and ADP to create ATP The big protein enzyme known as ATP synthase, which produces energy for the cell, is the location to which angiostatin binds.
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Where can you change the atom/molecules used in the simulation? Which atoms/molecules are
available for you to choose?
Answers
Answer:
When two or more atoms are chemically joined together, this is called a molecule. In some cases, such as hydrogen and oxygen, the molecule is made entirely of the same atom, such as hydrogen gas (a molecule) is made entirely of two hydrogen atoms. Here, converting molecules to atoms is as simple as dividing by two.
Atoms can join together - they form bonds together - to make MOLECULES. For example, two atoms of hydrogen hook together to form a molecule of hydrogen
WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!! WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!!
3. Which side of the chain should you count from when naming organic compounds?
A) Center
B) Right side
C) Side that will give you the longest Carbon chain
D) Left side
4. What is the pH of a solution with a pOH of 10?
A) 6
B) 14
C) 4
D) 10
Answers
Answer:
3. Which side of the chain should you count from when naming organic compounds?
C) Side that will give you the longest Carbon chain
4. What is the pH of a solution with a pOH of 10?
C) 4
pH + pOH = 14
pH + 10 = 14
pH = 14 - 10
pH = 4
-TheUnknownScientist
This is due at 2:00 am today. I only have a few points. No links please I need a real answer.
NaOH + AlCl3 --> Al(OH)3 + NaCI.
How many grams of AlCl3 are needed to completely react with 2.25 of NaOH?
Answers
Answer:
7.5 g of AlCl3
Explanation:
The given equation is;
NaOH + AlCl3 --> Al(OH)3 + NaCI.
By inspection, it is not balanced because OH and Clare not equal on both sides of the equation.
Thus, let's make them equal by balancing the equation.
Cl has 3 on the left, so we will make it to have 3 on the right. Same thing with OH on the right and we will make it to have 3 on the left. Thus:
3NaOH + AlCl3 --> Al(OH)3 + 3NaCI
We can see that;
NaOH has 3 moles
While AlCl3 has 1 mole
Thus, to find how many grams of AlCl3 will be required to completely react with 2.25g of NaOH ;
2.25g of NaOH × (3 moles NaOH/39.997 g/mol of NaOH) × (1 mole of AlCl3/3 moles of NaOH) × (133.34 g/mol of AlCl3/1 mol AlCl3) = 7.5 g of AlCl3