1.64 mol of nickel at 150.13ºC is placed in 1.00 L of water at 25.09ºC. The final temperature of the nickel-water mixture is 26.34ºC. What is the specific heat of nickel?
a. 0.439 J K-1 mol-1
b. 0.554 J K-1 mol-1
c. 2.28 J K-1 mol-1
d. 25.7 J K-1 mol-1
e. 31.6 J K-1 mol-1
Methanol is an important solvent. it is also an important starting material for the synthesis of other molecules. most methanol today is obtained from the
Brainliest if answered in the next 5m
A weak acid, like Hydrofluoric acid, can be dangerous if _____. Select all that apply.
concentrated
used without adult supervision
used without goggles
used without gloves
tasted
The compound ch3 - ch2 - sh is in the organic family known as
The compound CH3-CH2-SH belongs to the organic family known as Thiols. Thiols are structurally similar to alcohols but the oxygen atom in alcohols is replaced by sulfur in thiols. Both thiols and alcohols belong to a larger class called the Hydrocarbon Derivatives.
Explanation:The compound you mentioned, CH3-CH2-SH, falls into the organic family categorized as 'Thiols'. Thiols are similar to alcohols in structure, but they have a sulfur atom rather than an oxygen atom. They are identified by the -SH or sulfhydryl functional group. Like the hydroxyl group in an alcohol, this sulfhydryl group gives a thiol its properties.
For example, the compound CH3-SH, also known as 'Methanethiol', is analogous to the alcohol methanol. Both thiols and alcohols are part of a larger class called the 'Hydrocarbon Derivatives'. As the name suggests, these are derived from hydrocarbons by replacing one or more hydrogen atoms with a functional group, which in this case is either a hydroxyl group (-OH) for alcohols or a sulfhydryl group (-SH) for thiols.
Learn more about Thiols here:https://brainly.com/question/35084168
#SPJ6
A mixture of pure agcl and pure agbr is found to contain 60.94% ag by mass. what are the mass percents of cl and br in the mixture?
Final answer:
To calculate the mass percentages of Cl and Br in a mixture of AgCl and AgBr with 60.94% Ag by mass, we need additional data to determine the individual masses of Cl and Br. Without it, we cannot provide precise percentages.
Explanation:
The question is about calculating the mass percents of chlorine (Cl) and bromine (Br) in a mixture of silver chloride (AgCl) and silver bromide (AgBr) that contains 60.94% silver (Ag) by mass. The molar mass of silver (Ag) is 107.87 g/mol, for AgCl it is 143.32 g/mol (107.87 g/mol + 35.45 g/mol for Cl), and for AgBr it is 187.77 g/mol (107.87 g/mol + 79.90 g/mol for Br).
To find the mass percentages of Cl and Br in the mixture, we will first assume we have 100 grams of the mixture. Given the percent of silver, we can calculate the mass of silver in the mixture, which should be 60.94 grams. The remaining mass will be the combined mass of Cl and Br. However, without additional information such as the mass or molar ratios of AgCl to AgBr, we cannot precisely divide the remaining mass between Cl and Br. If such data were available, the mass percentages of Cl and Br could be found by calculating their individual masses and dividing by the total mass of the mixture, then multiplying by 100.
Which type of storage facility is assumed to be safe for long term storage of nuclear waste products
Answer:
Deep geological disposal method
Explanation:
A deep geological disposal method is the most efficient method in disposing of the waste materials produced from a nuclear plant. These materials are disposed at a depth of usually about 200 to 1000 m below the surface and also from 1500 m to 5500 m below the surface. And it has to be below the groundwater level so that it does not contaminate it. So necessary precautionary measures are needed to be taken.
This method is used for the disposal of high and intermediate levels of nuclear waste often represented by HLW and ILW respectively.
You are given a clear solution of KNO3. Using 3 – 4 sentences (in your own words) explain how you would determine if the solution is unsaturated, saturated or supersaturated.
What is the approximate molar mass of a molecular solute if 300 g of the solute in 1000 g of water causes the solution to have a boiling point of 101°C? (Kb = 0.512°C/m; Kf = 1.86°C/m; molar mass of water = 18 g)
Answer: The molar mass of solute is 156 g/mol
Explanation:
Elevation in boiling point is defined as the difference in the boiling point of solution and boiling point of pure solution.
The equation used to calculate elevation in boiling point follows:
[tex]\Delta T_b=\text{Boiling point of solution}-\text{Boiling point of pure solution}[/tex]
[tex]\Delta T_b[/tex] = ? °C
Boiling point of pure water = 100°C
Boiling point of solution = 101°C
Putting values in above equation, we get:
[tex]\Delta T_b=(101-100)^oC=1^oC[/tex]
To calculate the elevation in boiling point, we use the equation:
[tex]\Delta T_b=iK_bm[/tex]
Or,
[tex]\Delta T_b=i\times K_b\times \frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}[/tex]
where,
[tex]\Delta T_b[/tex] = 1°C
i = Vant hoff factor = 1 (For non-electrolytes)
[tex]K_b[/tex] = molal boiling point elevation constant = 0.52°C/m.g
[tex]m_{solute}[/tex] = Given mass of solute = 300 g
[tex]M_{solute}[/tex] = Molar mass of solute = ?
[tex]W_{solvent}[/tex] = Mass of solvent (water) = 1000 g
Putting values in above equation, we get:
[tex]1^oC=1\times 0.52^oC/m\times \frac{300\times 1000}{M_{solute}\times 1000}\\\\M_{solute}=156g/mol[/tex]
Hence, the molar mass of solute is 156 g/mol
42.5 grams of an unknown substance is heated to 105.0 degrees Celsius and then placed into a calorimeter containing 110.0 grams of water at 24.2 degrees Celsius. If the final temperature reached in the calorimeter is 32.4 degrees Celsius, what is the specific heat of the unknown substance?
Show or explain the work needed to solve this problem, and remember that the specific heat capacity of water is 4.18 J/(°C x g).
Answer:The specific heat of the unknown substance is 1.22 J/ °Cg.
Explanation:
Heat absorbed by the water .
Mass of the water = 110.0 g
Change in temperature of water = [tex]\Delta T=32.4^oC-24.2^oC=8.2^oC[/tex]
[tex]Q=mc\Delta T=110.0g\times 4.18 J/^oCg\times 8.2^oC=3,770.36 J[/tex]
Heat lost by substance(Q') = Heat gained by the water(Q)
-Q' = Q
Change in temperature of the substance =
[tex]\Delta T'=(32.4^oC)-105.0^oC=-72.6 ^oC[/tex]
Mass of the substance = m'=42.5 g
Specific heat of substance = c'
[tex]-(m'\times c'\times \Delta T')=3,770.36 J[/tex]
[tex]c'=\frac{3,770.36 J}{42.5 g\times 72.6^oC}=1.22 J/^oCg[/tex]
The specific heat of the unknown substance is 1.22 J/ °Cg.
calcium, magnesium, and phosphorus are all examples of
substance which allows energy to pass through it
Why does a compound have characteristic properties?
Answer: Because of the arrangement of atoms in a compound.
Explanation:
A compound is defined as the chemical specie which is formed by the combination of two or more different type of atoms. For Example: [tex]H_2O,O_2[/tex] etc...
A compound has different physical and chemical properties than corresponding elements because of change in identity. For Example: Hydrogen and oxygen are gases, but the compound formed by the combination of these two that is water is liquid.
In a chemical compound, elements are combined in a fixed ratio of their masses.
Hence, a compound has characteristic property because of the arrangement of atoms in a compound
True or False no two elements have the same atomic number.
The atomic number of this element is 9 and its mass is 20. how many neutrons does this element have?
Answer:
11 neutrons
Explanation:
Mass no. = 20
atomic no. = 9
no. of neutrons = mass number - atomic number
= 20 - 9
= 11 neutrons
What reactions are responsible for the glow and heat from the sun? nuclear fission nuclear fusion chemical reactions atomic disintegration?
What volume is needed to make a 4.0 molar solution holding 12 moles of solute? 3.0 liters 48 liters 12 liters 4.0 liters
Answer: Option (a) is the correct answer.
Explanation:
Molarity is defined as the number of moles present in a liter of solution.
Mathematically, Molarity = [tex]\frac{\text{no. of moles}}{volume}[/tex]
Since, it is given that molarity is 4.0 molar or 4.0 m/L and no. of moles is 12 moles.
Therefore, calculate volume as follows.
Molarity = [tex]\frac{\text{no. of moles}}{volume}[/tex]
4.0 m/L = [tex]\frac{12 moles}{volume}[/tex]
volume = 3 L
Hence, we can conclude that volume of the given solution is 3 liters.
Calculate the percent ionic character of a chemical bond between beryllium and fluorine
The percent ionic character of a chemical bond, such as between beryllium and fluorine, can be determined using the difference in electronegativity between the two elements based on Pauling's scale. Most bonds exhibit partial ionic character, as they fall within the spectrum between purely ionic and purely covalent.
Explanation:The percent ionic character of a chemical bond refers to the degree to which the bond exhibits ionic properties. In an ideal ionic bond, electrons are completely transferred from one atom to another. However, in reality, most bonds fall within the spectrum between purely ionic and purely covalent, exhibiting partial ionic character.
In the case of the bond between beryllium and fluorine, you can determine the percent ionic character by making use of Pauling's electronegativity values. First, you would calculate the difference in electronegativity between the two elements. Then, you use this difference to estimate the percent ionic character based on Pauling's scale.
For example, consider the hypothetical molecule HCl mentioned in the reference. Supposed that HCl was completely ionic, its molecular dipole moment was calculated to be 6.09 D. The experimentally measured bond moment, however, turned out to be 1.03 D. The percent ionic character was hence calculated as the bond moment divided by the theoretical fully ionic bond moment, multiplied by 100%. The result was 17%.
Learn more about Percent Ionic Character here:https://brainly.com/question/18369689
#SPJ12
4 NH3 + 6 NO → 5 N2 + 6 H2O. How many moles of NO are required to completely react with 2.45 mol NH3? Show all of your work as well as the answer with the proper units.
Mole is equal to the Avogadro's constant. The 3.675 moles of NO is required to completely react with 2.45 mole of Ammonia.
Mole:
One mole is the unit of measurement of small particles like ions, atoms , and molecules. It is equal to the Avogadro's constant.
Given reaction,
[tex]\bold{4 NH_3 + 6 NO \rightarrow5 N_2 + 6 H_2O}[/tex]
Means 4 moles of Ammonia react with 6 moles of NO in reaction. the molar ratio of ammonia and NO is 4:6.
Hence,
Moles of NO required
[tex]\Rightarrow\bold{\frac{6}{4} \times 2.45 = 3.675 mole}[/tex]
Hence, we can conclude that the 3.675 moles of NO is required to completely react with 2.45 mole of Ammonia.
To know more about mole, you can refer to the link:
https://brainly.com/question/20486415
Draw a fatty acid chain that is 8 carbons long and is unsaturated
Which is the next logical step in balancing the given equation?
CS2(l) + Cl2(g) CCl4(l) + S2Cl2(l)
A.) Place the coefficient 2 in front of sulfur dichloride (S2Cl2).
B.)Place the coefficient 3 in front of the chlorine molecule.
C.)Leave the equation alone as it is already balanced.
D.) Place the coefficient 4 in front of carbon disulfide(CS2).
E.)Place the coefficient 2 in front of carbon tetrachloride(CCl4).
CS2(l) +Cl2(g)→CCl4(l) + S2Cl2 (l)
The next logical step in balancing the equation above is place the coefficient 3 in front of the chlorine molecule ( answer B)
Explanation
When coefficient 3 in placed in front of chlorine molecule the balanced equation is as below
CS2 (l) +3Cl2 (g) → CCl4 (l) + S2Cl2 (l)When dissolved in water, baking soda is basic.the ph of baking soda (sodium bicarbonate) is closest to:?
Final answer:
Baking soda, or sodium bicarbonate, when dissolved in water, has a basic pH close to 9.0, classifying it as a weak base.
Explanation:
When sodium bicarbonate, commonly known as baking soda, is dissolved in water, it exhibits basic properties. The pH of a baking soda solution is closest to 9.0, which means it is a weak base. Water is neutral with a pH of 7.0, whereas a substance with a pH higher than 7.0 is considered alkaline or basic.
The pH scale ranges from 0 to 14, with 7 being neutral. Acids have a pH less than 7, and bases have a pH greater than 7. The pH of a substance is determined by its concentration of hydronium ions. Baking soda has a lower concentration of hydronium ions compared to pure water, thereby making it a base with a pH higher than 7.
In practical applications, baking soda is used to neutralize acids, such as in bee sting treatments or when mixed with acetic acid in vinegar during bread preparation.
A substance has a volume of 10.0 cm3 and a mass of 89 grams. What is its density?
Answer:
Density of the substance = 8.9 g/cm³
Explanation:
The volume of the substance = 10 cm³
Mass = 89 gm
Density = mass / volume = 89 gm / 10 cm³ = 8.9 g/cm³
What state of change do atoms or molecules become more ordered?
What net ionic equation can be derived from this complete ionic equation? 2fe3+(aq) + 6cl– (aq) + 6na+(aq) + 3co32– (aq) → fe2(co3)3(s) + 6cl– (aq) + 6na+(aq)?
identify solute and solvent in 80 solution of ethyl alcohol with water
How many moles of electrons are required to reduce one mole of nitrogen gas (N2) to two moles of nitrogen ions (N3-)?
Carbon monoxide poisoning is sometimes mistakenly identified as what?
When we breathe red blood cells bond to the oxygen but when we inhale carbon monoxide (CO), it sticks to red blood cells and block the oxygen and suffocation occurs. It is also known as “Silent Killer”.
Headaches, nausea and fatigue are some of early symptoms of carbon monoxide poisoning. It is sometimes mistakenly identified as “Flu”. Because this gas cannot be detected at home. It is produced by common household appliances, if not proper ventilated, such as water heaters, generators, cars etc.
Carbon monoxide poisoning and acute toxicity are related and often confused due to similar symptoms such as headache, weakness, and even death.
Carbon monoxide poisoning occurs due to inhaling excessive levels of carbon monoxide (CO), which can lead to symptoms like headache, dizziness, weakness, and even death. This poisoning is sometimes mistakenly identified as acute toxicity due to exposure to carbon monoxide.
Loss of consciousness, arrhythmias, seizures, and even death can result from large CO exposures.Long-term complications may include chronic fatigue, memory issues, and movement problems.If nickel is added to copper sulfate solution, the nickel will replace the copper. write the balanced equation
Answer:-
Ni + CuSO4 --> NiSO4 + Cu
Explanation:-
The symbol for Nickel is Ni.
The Symbol for copper is Cu.
Copper Sulphate has the formula CuSO4.
If Nickel replaces copper from copper sulphate then nickel sulphate is formed.
Nickel sulphate has the formula NiSO4.
So the equation becomes
Ni + CuSO4 --> NiSO4 + Cu
25 g of ethyl alcohol is dissolved in 100 ml of water (density = 0.99993 at 20 oc). what is the % w/w for the ethyl alcohol in the resulting solution?
In the sun, two hydrogen nuclides react together to make an atom of helium. the process releases energy. which type of reaction is this
Answer:
Fusion.
Explanation:
The core squeezes together so tightly that four hydrogen nuclei combine to form one helium atom. This is the textbook definition of nuclear fusion.