Calculate the density of a material that has a mass of 52.457 g and a volume of 13.5 cm3.
Answer:
3.8857037037g per cm3
Explanation:
52.357g/13.5 cm3 = 3.8857037037
Round if needed
How far can you drive in 3 hours if you constantly go 120 km/h
Answer:
If you are going at 120km per hour then, you should be able to go 360km in 3 hours.
Explanation:
Okay so, just multiply 120x3 and you get 360
also, Dividing 120/60 (How many mins are in a hour) You get 2Kilometers per min
Hope this helps!
8. An element that has strong intermolecular forces is most likely to have:
•a boiling point below room temperature
•a melting point below room temperature
•a boiling point very close to its melting point
•a very high melting point
Answer:
a very high melting point answer
The illustration to the left represents a mixture of hydrogen ( light blue ) and oxygen ( red ) reacting to form a product.
The product formed is H\(_2\)( g) + O\(_2\)( g) → 2 H\(_2\) O ( l). There are two moles of water that is formed when hydrogen and oxygen react.
What is hydrogen?The simplest chemical element is hydrogen (H), a colorless, odorless, tasteless, and combustible gaseous substance. The nucleus of the hydrogen atom is composed of a proton with one unit of positively electrical current and an electron with one unit of negatively electrical charge.
Under normal circumstances, hydrogen gas is a loose collection of hydrogen molecules, of which each is a diatomic molecule, or H2, made up of two atoms. The product formed is H\(_2\)( g) + O\(_2\)( g) → 2 H\(_2\) O ( l). There are two moles of water that is formed when hydrogen and oxygen react.
Therefore, the product formed is H\(_2\)( g) + O\(_2\)( g) → 2 H\(_2\) O ( l). There are two moles of water that is formed when hydrogen and oxygen react.
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C20H42 = 2C4H8 + 2C2H4 + ?
Answer:
C8H18
Explanation:
To be honest I feel like there is more than one answer but this is the answer I got. You calculate how much is left of carbon and hydrogen in order to balance the equation on the left. Once you got the value you just put it into a polynomial structure and you will get the answer above.
Is aluminum a cation or anion
Answer:
Aluminum, a member of the IIIA family, loses three electrons to form a 3+ cation. ... And all of them form an anion with a single negative charge. The VIA elements gain two electrons to form anions with a 2- charge. The VA elements gain three electrons to form anions with a 3- charge.
Arrange the measurements from longest length to shortest length.
Longest length
Shortest length
Answer Bank
0.01 km
1 x 10^11 nm
50 in
1000 yards
Measurement is the number or quantity that shows the size of the object. The measurements from longest to shortest are yards, km, inch, and nm.
What are units of length?Length is measured by various scales that include the distance and the range that can be stated in a unit. The unit yard is the longest and is followed by kilometers, inches, and the nanometer.
Therefore, the order is yards, km, inch, and nm.
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Need help asap please!
Which contributes to the polarity of a water molecule?
A. a linear shape along with strong covalent bonds
B. deflection of hydrogen atoms by lone pairs of electrons
C. no difference in the electronegativity of oxygen and hydrogen
D. hydrogen bond formation between water molecules
Answer:
B
Explanation:
because polarity of the water molecules is due to the B. deflection of the hydrogen atoms by the lone pair of electrons.
Answer:
B
Explanation:
Which process in the atmosphere is responsible for moving heat from warm equatorial regions to higher latitudes
Answer:
Heat transfer in the atmosphere from the equatorial regions to higher latitudes occurs through the process of Convection
Explanation:
The equatorial regions of the earth's surface receive the most heat from the sun than any other region of the earth. This is because the are most directly in line with the direct heat from the sun.
Due to this heat from the sun, atmospheric air around the equatorial regions are hot and less dense than air in regions of higher latitudes, and thus, rises above the equator. The rising air at the equator is replaced by colder and denser air from higher latitudes north and south of the equator. As the rising air of the equatorial regions are being replaced by colder and denser air from higher latitudes, the hot and humid air moves away from the equator, toward regions of higher latitude, north and south thereby setting up a convection current of heat flow.
Given 223. 68 g of Cu(NO3)2, how many moles of AgNO3 can be made?
0.596 moles of AgNO3 can be made from 223.68 g of Cu(NO3)2.
first find the number of moles of Cu(NO3)2 in 223.68 g. We can use the molar mass of Cu(NO3)2 to convert grams to moles:
Molar mass of Cu(NO3)2 = 63.55 + 2(14.01 + 3(16.00)) = 187.56 g/mol
Number of moles of Cu(NO3)2 = 223.68 g / 187.56 g/mol = 1.192 moles
The balanced chemical equation for the reaction between Cu(NO3)2 and AgNO3 is:
Cu(NO3)2 + 2AgNO3 -> 2AgNO3 + Cu(NO3)2
From the equation, we can see that 1 mole of Cu(NO3)2 reacts with 2 moles of AgNO3 to produce 2 moles of Cu(NO3)2 and 1 mole of AgNO3. Therefore, the number of moles of AgNO3 that can be made from 1.192 moles of Cu(NO3)2 is:
Number of moles of AgNO3 = 1.192 moles / 2 = 0.596 moles
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explain why zn reacts more slowly with dilute hydrochloric acid then with concentrated hydrochloric acid
Answer:
When the concentration is higher, more hydrogen ions are near the Zn atoms at any given time. This allows for more Zn atoms to be ionized and dissolved into the solution per second.
Explanation:
describe how to identify the smell of gas in the laboratory
Answer:
When you are in the laboratory and take a direct sniff the chemicals you are using, you run the risk of damaging your mucous membranes or your lungs. When its necessary to smell chemicals in the lab, the proper technique is to cup your hand above the container and waft the air towards your face.
Gas is a naturally odourless substance, but the completely harmless artificial smell is added to make it more detectable. The substance is called mercaptan and gives off a strong sulphur like smell.
select all of the following ways in which legislators can attempt to force negotiation on a bill by slowing down the legislative process.
Answer:
correct answers:
objecting to a local and consent bill
chubbing
filibuster
incorrect answers:
amending legislation
vetoing legislation
Explanation:
does the following reaction favor the reactants or products?
It would be helpful if you provided the reaction that you are referring to in your question. Without knowing the specific reaction, it is difficult to accurately answer whether the reaction favors the reactants or products. However, I will provide a general explanation of how to determine if a reaction favors the reactants or products.
In a chemical reaction, the reactants are the substances that are present before the reaction occurs, and the products are the substances that are formed as a result of the reaction. The direction that a reaction proceeds in is determined by the relative amounts of reactants and products, as well as the energy of the system. If a reaction releases energy (exothermic), it will generally favor the products. If a reaction requires energy (endothermic), it will generally favor the reactants.
Another factor that can influence the direction of a reaction is the equilibrium constant, K. The equilibrium constant is a measure of the relative amounts of reactants and products at equilibrium. If K is greater than 1, the reaction favors the products. If K is less than 1, the reaction favors the reactants.
Overall, whether a reaction favors the reactants or products depends on a variety of factors, including the relative amounts of reactants and products, the energy of the system, and the equilibrium constant.
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Are the following chemical equations reversible or irreversible?
2H2O ←→ H3O+ + OH-
HA + H2O ←→ A- + H3O+
HA + H2O → A- + H3O+
MOH → M+ + OH-
The first two chemical equations are reversible while the other two are irreversible.
What are chemical equations?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Arrange these elements into a table showing metals and non-metals: phosphorus, P, barium, Ba, vanadium, V. mercury, Hg, krypton, Kr, potassium, K, and uranium, U.
...,...................................
Which are included in the inflammatory response? Select three options.painswellingantibodiesmucusredness
Give at least 10 beneficial effects of separate mixture
Separation of mixtures is the process of isolating and purifying individual components from a mixture. It has a wide range of applications in various fields, including chemistry, biology, and environmental science. Here are ten beneficial effects of separation of mixtures:
Helps to obtain pure substances: Separation of mixtures helps in obtaining pure substances, which are essential for research and industrial processes.
Enables identification of individual components: Separation of mixtures allows the identification and characterization of individual components in a mixture.
Allows the removal of impurities: Separation of mixtures can be used to remove impurities from a mixture, which can improve the quality of the final product.
Facilitates recycling: Separation of mixtures is crucial for recycling materials such as plastic, paper, and metals.
Enables selective extraction: Separation of mixtures can be used to selectively extract specific components from a mixture.
Helps in drug development: Separation of mixtures is important in drug development, where pure compounds are required for testing and clinical trials.
Helps in forensic analysis: Separation of mixtures is used in forensic analysis to identify and analyze evidence.
Facilitates food processing: Separation of mixtures is used in the food industry to extract and purify ingredients.
Enables the production of clean energy: Separation of mixtures is used in the production of clean energy, such as separating hydrogen from other gases.
Helps in environmental remediation: Separation of mixtures is used in environmental remediation to separate and remove pollutants from soil, water, and air.
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suppose 2.05 liters of gas at 34 °c is under 7.51 × 107 pascals of pressure.
How many moles of gas are there in the system?
The moles of number can be calculated by making use of the ideal gas law, which is given by PV = nRT.
The pressure of the gas, P = 7.51 x 10^7 PaThe volume of the gas, Where:P is the pressure of the gas.V is the volume of the gas.n is the number of moles of the gas. R is the universal gas constant, which has a value of 8.314 J/(mol*K).T is the temperature of the gas in Kelvin.
The pressure of the gas, P = 7.51 x 10^7 PaThe volume of the gas, V = 2.05 LThe temperature of the gas in Celsius, T = 34 °C = 307 KNote: Kelvin = Celsius + 273Substituting the values into the ideal gas law,PV = nRT7.51 x 10^7 Pa × 2.05 L = n × 8.314 J/(mol*K) × 307 Kn = (7.51 x 10^7 × 2.05) ÷ (8.314 × 307)n = 601.3/2548.5n = 0.236 moles of gasThere are 0.236 moles of gas in the given system.
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indicate whether each of the following is characteristic of the fission or fusion process, or both: a. very high temperatures are required to initiate the reaction. b. less radioactive waste is produced. c. hydrogen nuclei are the reactants. d. large amounts of energy are released when the nuclear reaction occurs.
Let's analyze each characteristic in relation to the processes of fission and fusion:
a. Very high temperatures are required to initiate the reaction.
Fission: High temperatures are not required to initiate the fission process. Fission occurs when a heavy nucleus is split into two smaller nuclei1.Fusion: Very high temperatures are required to initiate the fusion process. Fusion occurs when two light nuclei combine to form a heavier nucleus. These high temperatures are necessary to overcome the electrostatic repulsion between the positively charged nuclei.b. Less radioactive waste is produced.
Fission: Fission reactions can produce a significant amount of radioactive waste due to the splitting of heavy nuclei and the formation of radioactive isotopes.Fusion: Fusion reactions generally produce less radioactive waste compared to fission reactions. The fusion process involves lighter nuclei and does not produce as many long-lived radioactive isotopes.c. Hydrogen nuclei are the reactants.
Fission: Hydrogen nuclei are not typically the reactants in the fission process. Fission reactions involve heavy nuclei such as uranium or plutonium.Fusion: Hydrogen nuclei, specifically isotopes such as deuterium and tritium, are the primary reactants in the fusion process.d. Large amounts of energy are released when the nuclear reaction occurs.
Fission: Fission reactions can release large amounts of energy. This occurs when the binding energy per nucleon of the resulting nuclei is greater than that of the initial nucleus.Fusion: Fusion reactions also release large amounts of energy. The energy is released when the binding energy per nucleon of the resulting nucleus is greater than that of the reactant nuclei.Summarizing the characteristics for fission and fusion:
Fission:
Very high temperatures are not required to initiate the reaction.More radioactive waste is produced.Hydrogen nuclei are not the reactants.Large amounts of energy are released.Fusion:
Very high temperatures are required to initiate the reaction.Less radioactive waste is produced.Hydrogen nuclei are the reactants.Large amounts of energy are released.Based on these characteristics, we can conclude that:
a. Very high temperatures are characteristic of fusion.
b. Less radioactive waste being produced is characteristic of fusion.
c. Hydrogen nuclei as reactants are characteristic of fusion.
d. Large amounts of energy being released are characteristic of both fission and fusion.
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what best describes the energy changes associated with evaporation and boiling
Answer:The statement 'atoms gain energy during evaporation and boiling' BEST describes the energy changes associated with evaporation and boiling.
In a given substance (e.g., water), atoms gain energy when they obtain kinetic energy, i.e. when they gain movement.
Evaporation refers to the physical process where a liquid is converted to a gas (in this case, water).
These processes (evaporation and boiling) increase the kinetic energy of water molecules to the detriment of the potential energy.
In conclusion, the statement 'atoms gain energy during evaporation and boiling' BEST describes the energy changes associated with evaporation and boiling.
Which reaction type? *
combination (synthesis)
combustion
decomposition
single replacement
double replacement
what is the high end of the temperature danger zone
The high end of the temperature danger zone is 140°F (60°C).The temperature danger zone (TDZ) is a term used to describe the temperature range at which foodborne pathogens can multiply at a rapid rate, posing a significant risk to food safety.
It refers to the range of temperatures between 40°F (4°C) and 140°F (60°C), which is where bacterial growth is most likely to occur.A temperature between 40°F and 140°F is known as the TDZ because it is within this range that most bacteria can multiply quickly. It is advised to keep food outside of this temperature range to prevent the growth of foodborne bacteria.The high end of the temperature danger zone is 140°F (60°C), which means that it is recommended to keep hot food at or above this temperature to prevent bacterial growth. On the other hand, cold food should be kept at or below 40°F (4°C) to avoid bacterial growth.
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PLEASEEE HELP SCIENCE A cold front forms when cold, dense air moves under warm, less dense air, as shown in the
following illustration. Cooler weather usually follows a cold front. Cold fronts often bring other weather
changes.
) what functional groups are present in the following structure? ch3ccch2oh a) an alcohol and an alkyne b) a ketone and an alkyne c) alcohol and an alkene d) an aldehyde and a ketone
The correct answer is (a). The functional groups present in the structure CH₃CCCH₂OH are an alcohol and an alkyne.
Which functional groups can be identified in the structure CH3CCCH2OH?The structure CH₃CCCH₂OH contains multiple functional groups. To determine the functional groups present, we need to analyze the structure. In this case, we can identify an alcohol functional group (-OH) due to the presence of the hydroxyl group attached to the carbon atom. Additionally, we can identify an alkyne functional group (-C≡C-) due to the triple bond between the two carbon atoms.
Therefore, the correct answer is option a) an alcohol and an alkyne.
In summary, the structure CH₃CCCH₂OH contains an alcohol functional group and an alkyne functional group. The alcohol group is represented by the hydroxyl group (-OH), and the alkyne group is represented by the triple bond between the carbon atoms.
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A certain gas has a volume of 195 mL at 20°C and 1.00 atm. What is the its volume in mL at60°C and 600 mm Hg?
To solve this question we will assume that the moles of gas do not change and that the gas behaves like an ideal gas.
For an ideal gas we have that its behavior will be according to the following equation:
\(PV=nRT\)Where,
P is the pressure of the gas, in atm
V is the volume of the gas, in liters
n are the moles of the gas
T is the temperature of the gas, in Kelvin
R is a constant, 0.08206 atm.L/mol.K
We have for this gas two states, an initial state (1) and a final state (2), so for each state we can apply the ideal gas law, we will have:
Initial state:
\(\begin{gathered} P_1V_1=nRT_1 \\ nR=\frac{P_1V_1}{T_1} \end{gathered}\)Final state:
\(\begin{gathered} P_2V_2=nR_T_2 \\ nR=\frac{P_2V_2}{T_2} \end{gathered}\)Since nR are constants, we can equate both equations:
\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\)For each state the conditions of pressure, volume and temperature will be:
P1=1.00atm
V1=195mL = 0.195L
T1=20°c = 293.15K
P2= 600mmHg=0.79atm
T2=60°C=333.15K
V2=Unknown
We clear V2 and replace the known data:
\(V_2=\frac{P_1V_1}{T_1}\times\frac{T_2}{P_2}\)\(\begin{gathered} V_2=\frac{1atm\times0.195L}{293.15K}\times\frac{333.15K}{0.79atm} \\ V_2=\frac{1\times0.195\times333.15}{293.15\times0.79}L \\ V_2=0.280L=280mL \end{gathered}\)Answer: The final volume of the gas will be 280mL
Normal
Question 1
Persons who have immigrated to Europe illegally most likely do so because they believe that
A
life will be better there than in their countries of birth
B
there is very little chance of being sent back home
C
it is very easy to move there legally
D
current residents are happy to help them
PLEASE HELP ASAP!!!!WILL MARK BRAINLEST
If 50.0 grams of HCl were dissolved in enough water to make a solution with a total volume of 5.0 liters, what would be the molarity of the solution?
Determine moles of solute:
Calculate molarity:
Answer:
If 50.0 grams of HCl were dissolved in enough water to make a solution with a total volume of 5.0 liters, then the molarity of the solution is 0.282M.
How do we calculate molarity?
Molarity of any solution will be calculated by using the below equation:
M = n/V, where
n = moles of solute
V = volume of solvent in L
Moles will be calculated by using the below equation:
n = W/M, where
W = given mass = 50g
M = molar mass = 35.45 g/mol
n = 50/35.45 = 1.41 moles
On putting values in the above equation, we get
M = 1.41mol / 5L = 0.282M
Hence required molarity of solution is 0.282 M.
Explanation:
A solution has an initial concentration of acid HA of 1.4 M. If the equilibrium hydronium ion concentration is 0.12 M, what is the percent ionization of the acid
To find the percent ionization of the acid, we first need to calculate the initial concentration of hydronium ions (H3O+).
HA + H2O ⇌ H3O+ + A-
Initial concentration of HA = 1.4 M
Equilibrium concentration of H3O+ = 0.12 M
Using the equilibrium constant expression for acid dissociation (Ka):
Ka = [H3O+][A-] / [HA]
Assuming the concentration of A- is negligible compared to HA, we can simplify the expression to:
Ka = [H3O+]^2 / [HA]
Rearranging the expression to solve for [H3O+], we get:
[H3O+] = sqrt(Ka x [HA])
We can look up the Ka value for HA (or calculate it if given enough information) and substitute the values:
Ka = [H3O+]^2 / [HA]
1.8 x 10^-5 = [H3O+]^2 / 1.4
[H3O+] = 0.0079 M
Now we can calculate the percent ionization:
% Ionization = ([H3O+] / [HA]) x 100
% Ionization = (0.0079 / 1.4) x 100
% Ionization = 0.56%
Therefore, the percent ionization of the acid is 0.56%.
Hi! To find the percent ionization of the acid, you'll need to use the given initial concentration of the acid HA (1.4 M) and the equilibrium hydronium ion concentration (0.12 M). Percent ionization can be calculated using the formula:
Percent Ionization = (Equilibrium Hydronium Concentration / Initial Concentration of Acid HA) × 100
Percent Ionization = (0.12 M / 1.4 M) × 100 ≈ 8.57%
The percent ionization of the acid is approximately 8.57%.
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Does carpet have molecules
Answer:
Yes
The simple answer is yes. Almost everything has atoms and molecules consisting in it. The answer is yes. Hope it helps!