Density of the given sample is 10.50 g /cm³ which is the density of silver.
What is density?Density of a substance is it's mass per unit volume.It is denoted by capital letter 'D'.It has SI unit of kg/m³.For a pure substance, density has numerical value which is same as it's mass.
Different materials have different densities which is found to be relevant to substance's purity and packaging.Osmium and Iridium are densest known elements.
Density is an intensive property because there is a narrow range of densities across the samples. It does not change with respect to the initial mass .It shows how much mass of substance is present in given amount of volume.
For the mentioned data, density is calculated as,mass/volume
which is 25/2.38=10.504 g/cm³
10.504 g/cm³ is the density of silver and hence the sample is of silver.
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Which state of matter characterized by having a definite shape and a definite volume?
Answer:
the correct answer is indeed solid
Explanation:
solids have compressed matter making them have a definite shape and volume
How is the number of neutrons in the nucleus of an atom calculated (1 point)?
Which naturally-occurring radioactive particles are negatively charged? 1. alpha particles 2. neutrons 3. gamma radiation 4. beta particles?
In Physics, of the listed naturally-occurring radioactive particles, beta particles carry a negative charge.
Explanation:In the field of Physics, there are several types of naturally-occurring radioactive particles, which include alpha particles, neutrons, gamma radiation, and beta particles. Of these, it is the beta particles that carry a negative charge. Alpha particles, on the other hand, are positively charged. Neutrons do not carry a charge. Finally, gamma radiation is actually a form of electromagnetic radiation, and thus, it also does not carry a charge.
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Products are what is created during a reaction what are the three products of cellular respiration
This process, known as cellular respiration, uses oxygen and glucose to produce ATP, carbon dioxide, and water. Since they are what is produced, ATP, carbon dioxide, and water are all byproducts of this process.
What three byproducts do cells produce during respiration?Oxygen and glucose are transformed into water and carbon dioxide during cellular respiration. By-products of the process include carbon dioxide, water, and ATP, which is turned into energy.
ATP and H2O are the last byproducts of cellular respiration. Two pyruvate molecules, four ATPs (a net of two ATP), two NADH, and two H2O are produced during glycolysis. Therefore, glycolysis is the only process that may take place in the absence of oxygen, and only two ATP molecules may be created for each glucose molecule.
Adenosine triphosphate (ATP), carbon dioxide, and water are the three byproducts of cellular respiration.
The Krebs cycle, also known as the citric acid cycle, electron transport, and glycolysis are the three processes that make up cellular respiration.
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In the reaction of fe3o4 with carbon to form carbon dioxide and iron, the number of moles of carbon required to convert 23 g of fe3o4 to products is
Catalysts increase reaction rates by lowering the activation energy of a reaction.
a. True
b. False
What is the entropy change of the system when 17.5 g of liquid benzene (c6h6) evaporates at the normal boiling point? the normal boiling point of benzene is 80.1°c and δhvap is 30.7 kj/mol?
Answer : The entropy change of the system is, 19.5 J/K
Solution :
Formula used :
[tex]\Delta S=\frac{n\times \Delta H_{vap}}{T_b}[/tex]
or,
[tex]\Delta S=\frac{\frac{w}{M}\times \Delta H_{vap}}{T_b}[/tex]
where,
[tex]\Delta S[/tex] = entropy change of the system = ?
[tex]\Delta H[/tex] = enthalpy of vaporization = 30.7 kJ/mole
n = number of moles of benzene
w = mass of benzene = 17.5 g
M = molar mass of benzene = 78 g/mole
[tex]T_b[/tex] = normal boiling point of benzene = [tex]80.1^oC=273+80.1=353.1K[/tex]
Now put all the given values in the above formula, we get the entropy change of the system.
[tex]\Delta S=\frac{\frac{17.5g}{78g/mole}\times (30.7KJ/mole)}{353.1K}=0.0195kJ/K=0.0195\times 1000=19.5J/K[/tex]
Therefore, the entropy change of the system is, 19.5 J/K
HELP ASAP!!
Which of the following sciences is NOT a sub-field of Earth Science?
a. Oceanography
b. Vulcanology
c. meteorology
d. Botany
Δh = -296 kj/mol (a) how much heat is evolved when 585 g sulfur is burned in excess o2
Lipids are made up of long hydrocarbon chains, composed of all carbon and hydrogen atoms. this characteristic makes lipids insoluble in water ("oil and water don't mix") because:
The type of compound that is most likely to contain a covalent bond is ________.
The type of compound that is most likely to contain a covalent bond is A. one that is composed of only nonmetals.
Covalent bonds typically form between nonmetal atoms because they have similar electronegativities and tend to share electrons to achieve a full outer electron shell.Ionic bonds form between metals and nonmetals due to the transfer of electrons from the metal to the nonmetal, resulting in electrostatic attraction between oppositely charged ions.Metallic bonds occur between metal atoms where electrons are delocalized over a lattice of metal cations.Let's review the options:
A. one that is composed of only nonmetals: Correct. Nonmetals tend to share electrons, forming covalent bonds.
B. held together by the electrostatic forces between oppositely charged ions: This describes ionic bonds, not covalent bonds.
C. one that is composed of a metal from the far left of the periodic table and a nonmetal from the far right of the periodic table: This combination typically forms ionic bonds.
D. a solid metal: Metals form metallic bonds, not covalent bonds.
E. There is no general rule to predict covalency in bonds: Incorrect. There is a general rule; covalent bonds are usually formed between nonmetal atoms.
Thus, the correct answer is A.
Complete Question:
The type of compound that is most likely to contain a covalent bond is ________.
A. one that is composed of only nonmetals
B. held together by the electrostatic forces between oppositely charged ions
C. one that is composed of a metal from the far left of the periodic table and a nonmetal from the far right of the periodic table
D. a solid metal Incorrect
E. There is no general rule to predict covalency in bonds.
What is the formula for the ionic compound formed by magnesium and iodine?
most bacteria are
A.unicellular eukaryotes
b. unicellular prokaryotes
c,multicellular eukaryotes
d, multicellular prokaryotes
Answer:
b. unicellular prokaryotes
Explanation:
Most of the bacteria are primitive organisms that is why they are not very advanced in terms of cellular organelles and body functions. They do not have high level of organization in their body like presence of tissues, organs, organ systems etc. because they are only single celled organisms that is why they are known as unicellular organisms. A single cell performs all the functions required to sustain life. Their genetic material is very primitive type of structure which does not have any nuclear membrane or nuclear envelop. It is circular in shape and lies in the cytoplasm and it is known as nucleoid instead of nucleus.
For example: E. coli.
The majority of bacteria are classified as unicellular prokaryotes, meaning they are composed of a single cell and lack a nucleated cell structure.
Explanation:Most bacteria are unicellular prokaryotes. Unicellular means that they are organisms composed of a single cell. Prokaryotes refer to organisms that do not have a nucleus and other specialized organelles in their cells, which is common in bacteria. One important distinction of prokaryotes, including bacteria, is that their DNA is not stored in a nucleus, unlike eukaryotes. In contrast, eukaryotes, whether unicellular or multicellular, have a nucleus to house their DNA in addition to other specialized organelles.
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How is the energy level of an atom's valence electrons related to the period in the periodic table?
A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 189 g of solution. the reaction caused the temperature of the solution to rise from 21.00 to 24.70 ∘c. what is the enthalpy of this reaction? assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water.
Which element listed below would have chemical properties similar to fluorine?
Answer:
D
Explanation:
Bromine
The common pathway for the oxidation of glucose and fatty acids is ________.
Which description identifies the correct charge of each atomic particle?
A.
electron = positive; proton = negative; neutron = no charge
B.
electron = negative; proton = positive; neutron = no charge
C.
electron = no charge; proton = negative; neutron = positive
D.
electron = negative; proton = no charge; neutron = positive
The space around the nucleus of an atom where the atom's electrons are found is called the
A 25.00 ml sample of hcl solution requires 34.30 ml of 8.670x10^-2m naoh solution to reach the end point. calculate the molarity of the hcl solution
Final answer:
The molarity of the HCl solution is 0.1174 M.
Explanation:
To calculate the molarity of the HCl solution, we can use the equation:
M1V1 = M2V2
Using the values given in the question:
M1 = Molarity of HCl solution = unknown
V1 = Volume of HCl solution = 25.00 mL = 0.025 L
M2 = Molarity of NaOH solution = 8.670x10^-2 M
V2 = Volume of NaOH solution = 34.30 mL = 0.0343 L
Plugging in these values into the equation, we get:
M1(0.025) = (8.670x10^-2)(0.0343)
M1 = (8.670x10^-2)(0.0343) / 0.025
M1 = 0.1174 M
tooth fillings are often made of gold or porcelain because those materials are not what?
What color element symbol designates elements that are a gas at a given temperature??
All atoms are neutral. explain the basis of this fact
What is the mass of a glucose solution that fills a 1.00 l intravenous bottle if the density of the glucose solution is 1.15 g/ml?
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property The mass of the glucose solution that fills a 1.00 l intravenous bottle is 1500g.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density = Mass of the glucose solution ÷volume of intravenous bottle
Volume of the intravenous bottle = 1.00l= 1.00 l*1000=1000ml
Density of glucose solution = 1.15 g/ml
Substituting all the values in above formula, we get
Mass of the glucose solution = Density*volume of intravenous bottle
Mass of the glucose solution =1.15 g/ml*1000ml
Mass of the glucose solution = 1500g
Therefore, the mass of the glucose solution that fills a 1.00 l intravenous bottle is 1500g.
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In a particular gravimetric analysis, the precipitate of caso4 was weighed before it was completely dried. the likely impact of this error on the calculated moles of caso4 will be:
Final answer:
Weighing CaSO₄ precipitate before it is completely dried will result in an overestimation of the moles and concentration of the analyte, known as a positive determinate error in gravimetric analysis.
Explanation:
If a precipitate of CaSO₄ was weighed before it was completely dried, the likely impact of this error on the calculated moles of CaSO₄ would be that the measured mass is higher than the true mass of the dry CaSO₄. This is because the precipitate would contain additional water, which contributes to the overall mass. Since the stoichiometric calculation of moles is based on the mass of the precipitate, having extra mass from the water will result in an overestimation of the moles of CaSO₄. Therefore, the calculated concentration of the analyte in the sample will also be higher than it should be. This type of error is termed a positive determinate error in gravimetric analysis and it affects not just the stoichiometry, but also the reported percentage purity or concentration of the analyte within the sample.
How many moles of hydrogen atoms are in 10.3 g of methane (ch4)?
which type of cell is a rose thorn A prokaryotic B eukaryota plant C eukaryotic animal D chloroplastic
B is the answer, hope this helps :D
How many moles of aluminum exist in 100.0 g of aluminum?
There are 3.7 moles in 100.0 g of aluminum
HOW TO CALCULATE NUMBER OF MOLES:
The number of moles contained in a substance can be calculated by dividing the mass of that substance by its molar mass. That is;no. of moles = mass ÷ molar mass
Molar mass of Aluminum = 27g/mol
no. of moles = 100g ÷ 27g/mol
no of moles = 3.703mol
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What is the density of hydrogen sulfide (h2s)?
what are the inferred pressure and temperature at the boundary of earths stiffer mantle and outer core
The inferred pressure and temperature at the boundary of Earth's stiffer mantle and outer core are very high, reaching up to several million atmospheres and exceeding 5000 degrees Celsius, respectively.
Explanation:At the boundary between Earth's stiffer mantle and outer core, the pressure and temperature are very high due to the immense weight and heat of the overlying material. The pressure can reach up to several million atmospheres, while the temperature can exceed 5000 degrees Celsius. These extreme conditions are necessary to maintain the liquid state of the outer core and the solid state of the inner core.These extreme conditions are necessary to maintain the liquid state of the outer core and the solid state of the inner core.These extreme conditions are necessary to maintain the liquid state of the outer core and the solid state of the inner core.
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