Answers
The value is 480 kcal with three significant figures.
One kilocalorie is defined as the amount of energy required to raise the temperature of 1 kilogram of water by 1 degree Celsius at standard atmospheric pressure.
The conversion factor between kilojoules (kJ) and kilocalories (kcal) is approximately 0.239006. This means that 1 kilocalorie is approximately equal to 0.239006 kilojoules.
To convert 2.01 × 10⁶ kJ to kilocalories (kcal) with three significant figures, we can use the conversion factor;
1 kJ = 0.239006 kcal (rounded to six decimal places)
Multiplying 2.01 × 10⁶ kJ by the conversion factor:
2.01 × 10⁶ kJ × 0.239006 kcal/kJ
= 480.4134 kcal
Therefore, the value is 480 kcal.
To know more about significant figures here
https://brainly.com/question/29153641
#SPJ1
Related Questions
(PLEASE HELP)"The most abundant isotope of Hydrogen has a mass of 1 amu. Therefore, the average atomic mass on the periodic table for Hydrogen will be 1 amu." Using the terms isotopes, abundance, average atomic mass and weighted mass to explain why this misconception is incorrect and why the abundance(amount) of each isotope of the element affect the average atomic mass.
Answers
The statement the most abundant isotope of Hydrogen has a mass of 1 amu is wrong.
What is the average atomic mass?The average atomic mass could be obtained as the sum of the products of the percentage abundance of each of the hydrogen isotopes and the mass of the isotope.
We know that every element has isotopes. In every sample of the atom, there are various isotopes of the element. Thus the average atomic mass must take into account the masses of all these isotopes.
As such, the statement the most abundant isotope of Hydrogen has a mass of 1 amu is wrong.
Learn ore about atomic mass:https://brainly.com/question/17067547
#SPJ1
Need Help ASAP
Thanks you
Answers
9) The long swabs purpose is to take a culture of the back of the patients throat to see what type of bacteria is present
10) The doctor may test her for other illnesses like the Flu or Mono
How is heat transferred from one object to another? A. Heat moves from warmer objects to cooler objects. B. Heat moves from cooler objects to warmer objects. c. Heat moves between objects of the same temperature. D. Heat moves back and forth between two objects.
Answers
Answer: I believe the answer is A, heat moves from warmer objects to cooler objects. I know for sure it isn’t C or D though so A
The heat is transferred from one object to another as heat moves from warmer objects to cooler objects. The correct option is A.
What is the transfer of heat?There are three ways to transfer heat. They are conduction, convection, and radiation. Heat travels from one body to another body. If the temperature of two objects is different, then the heat travels from higher temperature to lower temperature.
Conduction is the transfer of energy when two objects ate in contact with each other. Convection is a transfer between object and environment. Radiation is when transferred by emission of electromagnetic radiation.
Thus, the correct option is A. Heat moves from warmer objects to cooler objects.
Learn more about the transfer of heat, here:
https://brainly.com/question/13433948
#SPJ5
Which example is NOT a chemical change? *
A. Hydrogen peroxide bubbles in an open wound on your skin.
B. Piece of pizza digested when eaten.
C. Rotting Easter eggs. .
D. Dissolving salt in water.
Answers
Answer:
The answer would be D as no chemical change is occuring.
Explanation:
Answer:
D. Dissolving salt in water.
Explanation:
No chemical change is actually occurring when salt is added to water
The scientific name of this organism that means blind?
Answers
Answer:
Caecilian
That means blind.
Explanation:
The total number of atoms in 3.75 mol of ammonium nitrate, NH4NO3 , is
Answers
The total number of atoms in 3.75 mol of ammonium nitrate, NH4NO3, is equal to the Avogadro's number, which is 6.022 x 10^23, times the number of moles, which is 3.75 in this case.
Thus, the total number of atoms in 3.75 mol of ammonium nitrate is equal to 2.26 x 10^24 atoms.
This number can be further broken down into the number of atoms of each element present in the compound. Ammonium nitrate is composed of two elements, nitrogen (N) and hydrogen (H). For each mole of ammonium nitrate, there are 4 moles of hydrogen atoms and 2 moles of nitrogen atoms.
Therefore, in 3.75 moles of ammonium nitrate, there are 15 moles of hydrogen atoms and 7.5 moles of nitrogen atoms, which is equal to 9 x 10^24 hydrogen atoms and 4.05 x 10^24 nitrogen atoms.
Learn more about ammonium nitrate at:
https://brainly.com/question/5148461
#SPJ1
convert 6.8 × 10^2 to standard notation.
Answers
Answer:
680
Explanation:
Move the decimal 2 to the right.
When a number is written using only the digits of the number, that is considered standard notation. 6.8 × 10² is converted into standard notation by shifting two decimal to the right side, then it became 680.
What is standard notation ?A form of writing a certain number, an equation, or an expression in a way that adheres to set norms is known as a standard notation. For instance, 4,500,000,000 years is how 4.5 billion years is written.
When a number is written using only the digits of the number, that is considered standard notation. Since words are not used in conventional number notation, this is the way that numbers are typically written.
The stages to writing a number in its standard form are as follows: Write the first digit of the supplied number in step one. Step 2: After the first number, add the decimal point. Step 3: Next, count how many digits there are in the supplied number after the first one and express that number as a power of 10.
Thus, the standard notation is 680.
To learn more about standard notation, follow the link;
https://brainly.com/question/10253124
#SPJ2
An empty beaker weighs 34.67 g.
When completely filled with water, the beaker and it’s contents have a total mass of 296.35 g. What volume does the beaker hold?
How much would the beaker and its contents weigh if it was completely filled with mercury? The density of mercury is d = 13.5g/mL.
Find the mass.
Answers
This problem is providing the mass of an empty beaker as 34.67 g, the mass of the beaker with water as 296.35 g and asks for the volume it can hold. Also, it asks for the mass of mercury contained in the beaker if its density is 13.5 g/mL. At the end, the results turn out to be 262.5 mL and 3,543 g.
Density:In science, density is known as the degree of compactness of a substance, which means it can be calculated via:
\(\rho =\frac{m}{V}\)
Thus, given the mass of the empty beaker and the beaker with water, one can calculate the mass of water and then solve for the volume to calculate what the beaker is able to hold:
\(m_w=296.35g-34.67g=261.68 g\\\\V=\frac{m}{\rho} =\frac{261.68g}{0.997 g/mL} =262.5mL\)
Because the density of water is about 0.997 g/mL. Thereafter, one can calculate the mass of mercury with this volume and its given density:
\(m_{Hg}=V*\rho=262.5mL*13.5\frac{g}{mL}\\ \\m_{Hg}=3543g\)
Learn more about density: https://brainly.com/question/952755
Estimate the latent heat of fusion for a food product with 68% moisture content
Answers
The latent heat of fusion for a food product with 68% moisture content could be between 70-150 Joules per gram (J/g).
The latent heat of fusion is a crucial factor that determines the energy required to melt a food product. The percentage of moisture content present in a food product is a key variable that can significantly affect its latent heat of fusion. However, the latent heat of fusion for such food products is not set in stone and can vary depending on several other factors as well.
The type of food product, its composition, and melting point are some of the other key aspects that can influence a food product's latent heat of fusion. Different food products may have different latent heats depending on their composition and melting point. For instance, products with high-fat content may require more energy to melt than products with low-fat content. Similarly, if a food product has a low melting point, it may require less energy to melt.
Learn more about latent heat of fusion at
https://brainly.com/question/30762921
#SPJ1
LAST ATTEMPT IM MARKING AS BRAINLIEST!! (What is this compound ? )
Answers
Answer:
its water h²O
Explanation:
Hopeitshelp
A
is useful in explaining current behavior and predicting future behavior.
Answers
Psychology is useful in explaining current behavior and predicting future behavior.
What is psychology?Psychology is an empirical investigation of the intellect and conduct, encompassing a vast scope of subjects such as cognitive processes, affective states, volition, individual traits, and interpersonal dynamics.
Psychologists employ a diverse array of approaches to examine behavior, including careful observation, in-depth interviews, comprehensive surveys, and controlled experiments.
By discerning the underlying determinants, psychology serves as a tool to elucidate present conduct. These determinants may involve biological, psychological, and sociocultural influences.
Learn about psychology here https://brainly.com/question/12011520
#SPJ1
Which of the following distinguishing electron configurations is characteristi
of noble gases?
O nf14
Ond10
O npo
Ons2
Answers
Answer:
no.3 is your correct answer
The meaning of the word symptom:
Answers
The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.
Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.
Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.
It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.
for more such questions on symptom
https://brainly.com/question/21078887
#SPJ8
The grams of fat in one avocado that has 375 kcal, 17g of carbohydrates, and 3g of protein?
Answers
Answer: Six grams
Explanation: The avocado has a high-fat content, but it is only half the fat content of other fruits and vegetables. One avocado has about six grams of fat.
2. Consider the reaction: 2C6H4Cl₂ +1302 → 12CO₂ + 2H₂O + 4HC1a.) If you had 18.5 mol of C6H4Cl2, how many mol of CO₂ would you produce?b.) If you had 150.6 mol of O₂, how many mol of CO₂ would you produce?c.) If you had 18.5 mol of C6H4Cl₂ and 150.6 mol of O2, which reactant would be limiting?d.) What is the theoretical yield of CO2, in moles?3. How many grams of H2O would be produced if 20 5 grams H? renot with 80
Answers
Answer:
\(\begin{gathered} a)\text{ 111 moles} \\ b)\text{ 139.02 moles} \\ c)\text{ C}_6H_4Cl_2 \\ d)\text{ 111 moles} \end{gathered}\)Explanation:
a) From the balanced equation of reaction:
2 moles of dichlorobenzene produced 12 moles of carbon dioxide
18.5 moles of dichlorobenzene will produce x moles of carbon dioxide
To get the value of x, we have it that:
\(\begin{gathered} 2\text{ }\times x\text{ = 18.5 }\times12 \\ x\text{ = }\frac{18.5\times12}{2}\text{ = 111 moles} \end{gathered}\)b) From the equation of reaction:
13 moles of oxygen produced 12 moles of carbon dioxide
150.6 moles of oxygen will produce x moles of carbon dioxide
To get the value of x, we have it that:
\(\begin{gathered} 13\text{ }\times\text{ x = 12 }\times150.6 \\ x\text{ = }\frac{12\times150.6}{13} \\ x\text{ = 139.02 moles} \end{gathered}\)c) The limiting reagent would be the reactant that produces less of the product
dichlorobenzene produces less and thus, it is the limiting reactant
d) To get the theoretical yield, we multiply the number of moles of the limiting reagent by the ratio between the product and the limiting reagent
We have the number of moles of the limiting reagent by the mole ratio
We have the number of moles of the limiting reagent as 18.5 mol and the mole ratio as (product to reactant = 12:2 = 6 to 1)
We have the theoretical yield as:
\(6\text{ }\times\text{ 18.5 = 111 mol}\)I need help with the practice question at the bottom. Thank you.
Answers
Explanation:
For this question, we apply the equation: Q = mCp AT Where m is the mass of the substance, Cp
is its specific heat capacity and AT is the
temperature change. Q = 896 x 0.45 x (5-94)
Q = -35884.8 Joules
So about -36 kilojoules of heat is released.
mark as brainliest
CuI2 (light brown solid) name copper compounds
Answers
CuI2 is not a known compound. Copper compounds typically have different oxidation states for copper, resulting in various compound names.
Copper(II) oxide (CuO): It is a black solid compound where copper is in the +2 oxidation state. It is commonly used as a pigment and in catalytic reactions.
Copper(II) sulfate (CuSO4): It is a blue crystalline compound in which copper is in the +2 oxidation state. It is used in various applications such as agriculture, electroplating, and as a laboratory reagent.
Copper(I) oxide (Cu2O): It is a red crystalline compound in which copper is in the +1 oxidation state. It is used as a pigment, in solar cells, and as a catalyst.
Copper(II) chloride (CuCl2): It is a greenish-brown solid compound in which copper is in the +2 oxidation state. It is utilized in various chemical processes, including etching and catalyst synthesis.
Copper(II) nitrate (Cu(NO3)2): It is a blue crystalline compound where copper is in the +2 oxidation state. It is commonly used in the production of catalysts, as a coloring agent, and in electroplating.
These are just a few examples of copper compounds with different oxidation states and properties. It's important to note that the compound CuI2 mentioned in the question, if it exists, would be an exception to the typical nomenclature for copper compounds.
For more such questions on oxidation visit:
https://brainly.com/question/13182308
#SPJ8
A gas mixture containing N2 and O2 was kept inside a 2.00 L container at a temperature of 23.0°C and a total pressure of 1.00 ATM the partial pressure of oxygen was 0.722 ATM how many grams of nitrogen are present in the gas mixture
Answers
Answer:
0.641 g of Nitrogen are present in the mixture.
Explanation:
We use the Ideal Gases Law, to solve this question.
For the mixture:
P mixture . V mixture = mol mixture . R . T
We convert the T° to K → 23°C + 273 = 296 K
R = Ideal gases constant → 0.082 L.atm/mol.K
1 atm . 2L = mol mixture . 0.082 L.atm/mol.K . 296K
2 atm.L / ( 0.082 mol /L.atm) . 296 = 0.0824 moles
We know that sum of partial pressure = 1
Partial pressure N₂ + Partial pressure O₂ = 1
1 - 0.722 atm = Partial pressure N₂ → 0.278 atm
We apply the mole fraction concept:
Partial pressure N₂ / Total pressure = Moles N₂ / Total moles
Moles N₂ = (Partial pressure N₂ / Total pressure) . Total moles
Moles N₂ = (0.278 atm / 1 atm) . 0.0824 mol → 0.0229 moles
We convert the moles to mass → 0.0229 mol . 28 g/mol = 0.641 g
641 mg
More than half the total present volume of ocean water resides in what ocean?
Answers
The Pacific Ocean is the largest ocean in the world based on water volume, totaling some 660 million cubic kilometers and is almost equally divided into the North and South Pacific waters.
Calculate the mass of calcium carbonate that must be decomposed to produce 25.0 L of carbon dioxide gas at 26 °C and 0.997 atm . How many liters of CO2 would be produced if there was only a 78% yield?
Answers
The mass of calcium carbonate that must be decomposed to produce 25.0 L of carbon dioxide gas at 26 °C and 0.997 atm is 104.1 g
The volume of CO₂ produced with a 78% yield would be 19.7 L.
What mass of calcium carbonate must be decomposed to produce 25.0 L of carbon dioxide gas at 26 °C and 0.997 atm?The mass of calcium carbonate that must be decomposed to produce 25.0 L of carbon dioxide gas at 26 °C and 0.997 atm is calculated from the equation of the reaction as follows:
The balanced equation of reaction: CaCO₃(s) → CaO(s) + CO₂(g)
The number of moles of CO₂ produced is determined from the ideal gas equation:
n = PV/RT
n = (0.997 atm) × (25.0 L) / [(0.0821 L·atm/(mol·K)) × (299 K)]
n = 1.04 mol CO₃
From the balanced equation;
1 mol of CaCO₃ produces 1 mol of CO₂.
Moles of CaCO₃₃required = 1.04 mol of CaCO3.
the mass of CaCO3 needed will be:
mass = 1.04 mol × 100.09 g/mol
mass = 104.1 g
If there is only a 78% yield, the actual moles of CO₂ produced would be:
moles = 0.78 × 1.04 mol
moles = 0.81 mol
solving for volume using the ideal gas equation:
V = nRT/P = (0.81 mol) × (0.0821 L·atm/(mol·K)) × (299 K) / (0.997 atm)
V = 19.7 L
Learn more about calcium carbonate at: https://brainly.com/question/29369494
#SPJ1
In the benzene molecule, carbon atoms form a ring with alternating single and double bonds in between each of them. Each carbon atom forms one σ bond with one carbon atom and one σ and one π bond with another. The π bonding electrons are delocalized over the entire molecule. Thus, benzene is a resonance hybrid of two equivalent structures, and the single and double bonds oscillate from one position to the other.
Required:
Calculate the bond order for one carbon-carbon bond in the benzene molecule, taking σ and π bonding into consideration.
Answers
Answer:
1.5
Explanation:
From;
BO = ½(B – A)
BO= Bond order
B= Number of bonding electrons
A = Number of antibonding electrons
For the sigma bonds, there are 2 bonding electrons and 0 nonbonding electrons.
σ BO = ½(B – A) = ½(2 – 0) = 1
π bond order for 6 C-C bonds;
π BO = ½(B – A) = ½(6 – 0) = 3
For each π bond, BO = 3/6 = 0.5.
Hence, for a single C-C bond in benzene, the total Bond order = σ + π = 1 + 0.5 = 1.5.
Determine the ratio of electrostatic potential energies for CsF and Csl.
lon
lonic Radius (pm)
Cst
170
F-
133
1
220
Answers
Answer:
The answer is "1.29".
Explanation:
Formula for electrostatic potential energy:
\(\to V=\frac{K Q_1 \times Q_2}{r}\)
where
\(\to K = \text{electrostatic constant}\\\\\to Q= \text{Charge on Cation}\\\\\)
The Charge on Cation is \(C_{s}^{+}\) is cation in both \(C_sI\) and \(C_sF\) were same:
\(\to V\ \alpha \ \frac{1}{r}\)
\(\to \frac{V(C_sF)}{V(C_sI)} = \frac{r(C_sI)}{r(C_sF)}\)
\(= \frac{r(C_s^{+}) +r(I^{-})}{r(C_s^{+}) +r(F^{-})} \\\\=\frac{170+220}{170+133} \\\\=\frac{390}{303} \\\\ =1.2871 \\\\ =1.29\)
Scientific notation.
Answers
Answer:
23.1 x 10^11
Explanation:
(4.2x5.5) x (10^9x10^2)
23.1 x 10^11 (Add the exponents, and multiply the decimals.)
I hope this helped! :)
Which of these mixture is a solution
Answers
Answer:
A. Sugar and water
Explanation:
Because water can dissolve sugar
A sample of nitrogen gas occupies a volume of 255 mL at 0.974 atm pressure. what volume will it occupy at 1.05 atm pressure?
Answers
The sample of nitrogen gas will occupy 236.54 mL of volume at 1.05 atm pressure.
Give a brief account on Boyle's Law.Boyle's law is the ideal law that defines the relationship between pressure and volume of gases. A law is given if the temperature is kept constant. Pressure and volume exhibit an inverse relationship.
The Boyle's Law is given as:
P₁V₁ = P₂V₂
Given,
Initial pressure (P₁) = 0.974 atm
Initial volume (V₁) = 255 mL
Final pressure (P₂) = 1.05 atm
Final volume = V₂
The final volume at 1.05 atm is calculated by substituting values in Boyle's Law as:
P₁V₁ = P₂V₂
0.974 × 255 = 1.05 V₂
V₂ = 248.37 ÷ 1.05
= 236.54 mL
To know more about Boyle's law, visit:
https://brainly.com/question/30367133
#SPJ1
If a snail crawls 55 inches per day, how many centimeters will he crawl in 23 days?
Group of answer choices
5.0X102 cm
1.06 cm
3.2X103 cm
6.1 cm
2.0X10-3 cm
Answers
If a snail crawls 55 inches per day ,the snail will crawl approximately \(3.2 * 10^3 centimeters.\)
To convert inches to centimeters, we need to use the conversion factor: 1 inch = 2.54 centimeters.
First, let's calculate the distance the snail crawls in inches in 23 days. We can multiply the daily distance by the number of days:
Distance in inches = 55 inches/day × 23 days = 1265 inches.
Now, to convert the distance from inches to centimeters, we multiply the distance in inches by the conversion factor:
Distance in centimeters = 1265 inches × 2.54 cm/inch = 3215.1 cm.
Rounding to the appropriate number of significant figures, the snail will crawl approximately 3215 cm or \(3.2 * 10^3 centimeters.\) in 23 days.
Therefore, the answer is Option 3:\(3.2 * 10^3 centimeters.\)
This means that in 23 days, the snail will crawl approximately\(3.2 * 10^3 centimeters.\)
Know more about centimeters here:
https://brainly.com/question/23883224
#SPJ8
Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?
Answers
Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?When heat is added to ice at 0°C, the temperature of the ice does not change. This happens because all the heat energy is used up in overcoming the intermolecular forces of attraction (hydrogen bonds) that exist between the water molecules in ice.
As a result, the ice undergoes a phase change, from a solid to a liquid. This process is called melting. During melting, the temperature of the ice remains constant at 0°C because all the heat energy is used up in overcoming the intermolecular forces of attraction.The energy required to melt ice is known as the heat of fusion. The heat of fusion is the amount of heat energy required to change 1 kilogram of a solid into a liquid at its melting point. For water, the heat of fusion is 334 kJ/kg. This means that 334 kJ of heat energy is required to melt 1 kg of ice at 0°C. Therefore, during the melting of ice, the temperature of the ice does not change, but the internal energy of the ice does change, and this is manifested in the change of phase from a solid to a liquid.In summary, when heat is added to ice at 0°C, the temperature of the ice does not change, and all the heat energy is used up in overcoming the intermolecular forces of attraction between the water molecules in ice. This results in the melting of ice without any change in temperature.For such more question on molecules
https://brainly.com/question/475709
#SPJ8
I know this is basic but, what is the powerhouse if the cell?
50 points!
Answers
Answer:
mitochondrion
Explanation:
Convert 0.00000000045 to scientific notation.
Answers
Answer:
4.5 multiplied by 10, to the -10th power.
\((4.5 \times 10 { - }^{10} )\)
While isobaric heat can be measured by using the coffee cup calorimeter, what kind of device would be needed to measure the reaction heat under isochoric condition? Please search literature to answer the question.
To measure the reaction heat more accurately at isobaric condition, what modification(s) would you suggest making on the coffee cup calorimeter? Please justify the suggested change(s).
Answers
To measure reaction heat under isochoric conditions, a bomb calorimeter is needed.
This device is designed to maintain a constant volume (isochoric) during the reaction, allowing for accurate measurement of reaction heat. To improve the accuracy of the coffee cup calorimeter for measuring reaction heat under isobaric conditions, a modification that could be made is to use a stirring device to ensure uniform mixing of the reactants and to minimize heat loss to the surroundings.
Additionally, a lid with a small hole could be placed over the top of the calorimeter to prevent heat loss while still allowing for pressure equalization. These modifications would help to minimize errors in heat measurement and improve the accuracy of the results obtained.
To know more about the Calorimeter, here
https://brainly.com/question/24150308
#SPJ1