If someone weighs 711 N on Earth, what is that person's
mass?
A. 71.1 kg
B. 70.0 kg
C. 72.6 kg
D. 73.5 kg

Answer: The pressure of nitrogen will be 2.0 atm

Explanation:

According to ideal gas equation:

\(PV=nRT\)

P = pressure of gas = 1.0 atm

V = Volume of gas = 10.0 L

n = number of moles = ?

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(297K\)

\(n=\frac{PV}{RT}\)

\(n=\frac{1.0atm\times 10.0L}{0.0820 L atm/K mol\times 297K}=0.41moles\)

Now again using ideal gas equation :

\(P=\frac{nRT}{V}=\frac{0.41mol\times 0.0821Latm/Kmol\times 297K}{5.0L}=2.0atm\)

Thus pressure of nitrogen will be 2.0 atm

Answer:

The mole fraction of benzene and toluene in solution containing mole fraction of benzene and toluene in solution containing is 45.9%

Explanation:

don't worry

its is correct!

Answer:

Mg+HCl = MgCl+H2

Explanation:

you just have to write the correct formula of these elemernt

Answer:

4 protons.

5 neutrons.

4 electrons.

Explanation:

Your # of protons will always be the atomic number (number above the symbol), which is 4.

Your # of neutrons will always be the atomic mass minus atomic number, which is 5.

Your # of electrons is also equal to the atomic number. It is also 4.

Answer:

you answer would be d

Explanation:

Answer:

d, Ca and Br: Calcium easily loses electrons, and bromine gains them

Explanation:

edge 2021

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The distribution of water-storage traits changed over time.

The distribution of water-storage traits can change over time due to a combination of genetic and environmental factors. Environmental factors such as climate change, availability of water, and changes in the amount of sunlight can all influence the selection pressures on different water-storage traits. As these environmental factors change, certain water-storage traits may become more advantageous than others, leading to changes in their distribution within the population.

Genetic factors such as mutations, genetic drift, and gene flow can also play a role in changing the distribution of water-storage traits over time. Mutations can introduce new alleles that code for different water-storage traits, which may be more or less advantageous in certain environmental conditions. Genetic drift, which refers to random changes in allele frequencies due to chance events, can also lead to changes in the distribution of water-storage traits over time. Gene flow, which refers to the movement of alleles between populations due to migration, can also introduce new alleles and alter the distribution of water-storage traits.

Over time, the combination of these genetic and environmental factors can lead to changes in the distribution of water-storage traits within a population. For example, in a dry environment, individuals with larger water-storage organs may be more likely to survive and reproduce, leading to an increase in the frequency of this trait within the population. Conversely, in a wet environment, individuals with smaller water-storage organs may be more likely to survive and reproduce, leading to an increase in the frequency of this trait within the population.

Hence, the distribution of water-storage traits is shaped by a complex interplay of genetic and environmental factors, and changes in this distribution over time reflect the dynamic nature of these interactions.

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1. The values of AT (apparent molar volume) for an experiment using urea and sodium chloride as solutes will be different because they have different molecular properties.

2. If a scientist's unknown compound contained an impurity that is insoluble in the solvent used, the molecular weight determination would be affected. This is because the impurity would contribute to the total mass of the sample, but it would not contribute to the colligative properties that are used to determine the molecular weight.

3. Molality (m) is defined as the number of moles of solute per kilogram of solvent, while molarity (M) is defined as the number of moles of solute per liter of solution. Molality is not temperature-dependent because the mass of the solvent (in kilograms) remains constant regardless of temperature. In contrast, molarity is temperature-dependent because the volume of the solution (in liters) changes with temperature due to thermal expansion or contraction.

Urea is a molecular compound, which means it consists of discrete molecules held together by intermolecular forces. In contrast, sodium chloride is an ionic compound, which means it consists of ions held together by electrostatic forces.

When dissolved in a solvent, the urea molecules can move independently of one another, and their interactions with the solvent molecules are mainly due to van der Waals forces. This means that the urea molecules do not significantly disrupt the structure of the solvent, and the volume of the solution is approximately equal to the sum of the volumes of the solute and solvent.

In contrast, when sodium chloride is dissolved in a solvent, the ions dissociate and interact with the solvent molecules through ion-dipole interactions. This interaction disrupts the structure of the solvent, and the volume of the solution is larger than the sum of the volumes of the solute and solvent.

The apparent molar volume (AT) is a measure of how much volume a mole of solute occupies in solution. Since the molecular properties of urea and sodium chloride are different, their AT values will also be different. Urea has a smaller AT value than sodium chloride because its molecules do not significantly disrupt the structure of the solvent.

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Hope you could get an idea from here.

Doubt clarification - use comment section.

The balanced oxidation half equation is given below:

Oxidation reactions are reactions in which the oxidation of the species increases.

Oxidation reactions can involve addition of oxygen or electronegative elements to a substance or the removal of hydrogen or electropositive elements from a substance.

The balanced half-reaction for the oxidation of solid manganese dioxide to permanganate ion in acidic aqueous solution is given below:

MnO₂ + H₂O → MnO₄⁻ + H⁺ + 3 e⁻

In conclusion, the balanced oxidation half equation shows that three electrons were lost by the manganese (iv) ion to form manganese (vii) ion.

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Answer:

4 parts of acid

Explanation:

Explanation:

[Ne] 3s² 3p⁵

Image result for What is the electron configuration of chlorine?

Atomic number: 17

Symbol: Cl

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Argon

The substance is called dark matter because the term dark matter describes matter that cannot be seen because it does not give off light. It can only be detected by observing its gravitational effects on other types of matter (option D).

Dark matter in physics or astronomy are particles of matter that cannot be detected by their radiation but whose presence is inferred from gravitational effects.

According to this question, the presence of dark matter is one piece of evidence that supports the Big Bang theory.

However, this matter is called "dark" because it does not appear to interact with the electromagnetic field i.e. it does not absorb, reflect, or emit electromagnetic radiation and is, therefore, difficult to detect.

Therefore, the substance is called dark matter because the term dark matter describes matter that cannot be seen because it does not give off light. It can only be detected by observing its gravitational effects on other types of matter.

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The statement is true.

When two amino acid monomers are positioned so that the carboxyl group of one is adjacent to the amino group of the other, they can be joined through a dehydration reaction.

What are amino acids?

The building blocks of protein in your body are called amino acids. In other words, you can't actually develop new muscle without your amino acids when it comes to protein synthesis. Your body can produce amino acids on its own as a byproduct of regular activity, which are known as your nonessential amino acids.

A dehydration reaction can unite two amino acid monomers when they are arranged so that the carboxyl group of one is next to the amino group of the other.

Thus, the made assertion is true.

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Atoms are combining to form molecules

Answer:

Iron is in nature in the form of its compounds… it is not as a free element.

does this help?

Answer:

3. Triple Beam Balance

Explanation:

A triple beam will be most suitable for measuring the mass of a small stone because it is very accurate, and has a reading error of +/- 0.05 gram.

Answer:

the answer is ''4g''

Explanation:

The mass of Cs present in 15.0 g of caesium acetate is approximately 10.18 grams.

To calculate the mass of Cs (caesium) present in 15.0 g of caesium acetate (\(\rm CsCH_3COO\)), you need to determine the molar mass of \(\rm CsCH_3COO\) and then find the proportion of Cs in the formula.

Molar mass of \(\rm CsCH_3COO\):

Cs: 1 atom * atomic mass of Cs = 1 * 132.91 g/mol = 132.91 g/mol

C: 2 atoms * atomic mass of C = 2 * 12.01 g/mol = 24.02 g/mol

H: 6 atoms * atomic mass of H = 6 * 1.01 g/mol = 6.06 g/mol

O: 2 atoms * atomic mass of O = 2 * 16.00 g/mol = 32.00 g/mol

Total molar mass of \(\rm CsCH_3COO\) = 132.91 + 24.02 + 6.06 + 32.00 = 194.99 g/mol

Now, find the proportion of Cs in the formula:

Mass of Cs in 1 mol of \(\rm CsCH_3COO\) = 132.91 g/mol

Mass of Cs in 15.0 g of \(\rm CsCH_3COO\) = (15.0 g * 132.91 g/mol) / 194.99 g/mol ≈ 10.18 g

Thus, the mass of Cs present in 15.0 g of caesium acetate is approximately 10.18 grams.

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Answer:

the heat source for our planet is the sun. Energy from the sun is transferred through space and through the earth's atmosphere to the earth's surface. Since this energy warms the earth's surface and atmosphere, some of it is or becomes heat energy.

Answer:

malleable

Explanation:

The image represent in malleable property of metal.

The image possibly represents the photoelectric effect of a metal, which is when it emits electrons after being exposed to electromagnetic radiation. Metals are also characterized by physical properties such as conductivity, malleability, metallic luster, and metallic bonding.

Based on your question, the image possibly represents the photoelectric effect, a key property of metals. This phenomenon occurs when a metal surface exposed to electromagnetic waves of a certain frequency absorbs radiation and emits electrons. These emitted electrons are called photoelectrons. Metals can also exhibit free electron model behavior, where electrons freely roam within the metal structure.

Metals possess unique physical properties like conductivity, malleability, and metallic luster. Malleability refers to the metal's ability to deform without breaking, while conductivity refers to the metal's ability to transfer heat or electricity. A metallic luster gives metals their characteristic shiny appearance.

Finally, metals are also known for their metallic bonding—a unique force that holds together the atoms within a metallic solid. Metallic bonding gives rise to many useful and varied bulk properties of metals.

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The resulting solution will contain 0.18 mL of MNO2 and be 0.01% in concentration.

To solve this problem, let's first set up the equation:
6 mL * 3% H2O2 = X mL * Y% MNO2
Next, let's solve for X and Y:
X = 6 mL * 3% = 0.18 mL
Y = 0.18 mL / 6 mL * 3% = 0.01%
Now that we have X and Y, we can answer the question.
Given 6 mL of 3% H2O2 in a clean test tube, add a tiny amount of MNO2 to the test tube and loosely stopper the tube. After 15-20 seconds, hold the tube at 45 degrees. The resulting solution will contain 0.18 mL of MNO2 and be 0.01% in concentration.

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Answer:

Coal, crude oil, and natural gas are all considered fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived millions of years ago. Because of their origins, fossil fuels have a high carbon content.

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All atoms are made up of particles known as protons, neutrons, and electrons.

Mass Number

The mass number of an atom is most commonly given in amus. Amu stands for atomic mass unit. In an atom, a proton = 1 amu, a neutron = 1 amu, and an electron = 0 amu. Since atoms are so small, it is hard to measure a singular in normal units such as grams. So, instead, scientists use amus. Comparatively, protons and neutrons are far larger than electrons. This is why electrons are given a mass of 0 amu. Of course, electrons do technically have mass, but that mass is so small that it is negligible in many calculations.

Counting Neutrons

When given the atomic number and mass number, it is easy to find the number of neutrons. The atomic number of an element tells you how many protons there are. The mass number gives you the mass of the atom in amus; this number is equal to protons + neutrons. This means that mass number - atomic number = neutron number.

So, we can set up a very simple equation to find the number of neutrons.

Most hydrogen atoms have no neutrons.

Answer:

A= solid

B= Melting and freezing

C= Liquid

Yes chemical Sanitizers can usually function properly in temperatures between 75°F and 120°F. Some metal objects may corrode when exposed to chlorine compounds at higher temperatures.

The temperature of chemical Sanitizers solutions should be at least 75°F. At lower temperatures, they are less effective. Chlorine can evaporate from a solution and cause some metals to corrode at temperatures above 120°F. Generally, temperatures between 75° and 120°F are ideal for all sanitizers. In environments with high temperatures and low humidity, products that require prolonged contact times may evaporate before disinfection is achieved. Because of this, disinfection cannot be accomplished with a single application. The water needs to be warm enough to increase the activity of the solution but not so warm that it speeds up sanitizer evaporation. Sanitizers can usually function properly in temperatures between 75°F and 120°F. Some metal objects may corrode when exposed to chlorine compounds at higher temperatures.

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Answer:

Explanation:

An atom is a complex arrangement of negatively charged electrons arranged in defined shells about a positively charged nucleus. This nucleus contains most of the atom's mass and is composed of protons and neutrons (except for common hydrogen which has only one proton).

The closest to the partial pressure of O₂ after the system has reached equilibrium is 0.5 atm, because K is very large, nearly all the SO₂ is consumed before the system reaches equilibrium, but an excess amount of O₂  remains at equilibrium. the correct answer is B.

Chemical equilibrium is the condition in which the concentrations of the reactants and products are equal and have no further tendency to fluctuate over time, with no discernible change in the features of the system.

The equilibrium moves to the side of the reaction where there are less moles of gas as the pressure increases. When the pressure decreases, the equilibrium moves to favor the reaction that produces more gas molecules.

Partial pressure is inversely proportional to volume, according to the ideal gas law. Additionally, it correlates with both the temperature and the amount of moles.

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Yes, all of the above characteristics apply to an atomic orbital.

Atomic orbitals are defined by the wave function, which describes the probability of the electron being in a certain region of space. They are identified by a unique combination of three quantum numbers, which are the principal quantum number (n), the angular momentum number (l), and the magnetic quantum number (m).

These three quantum numbers give information about the size and shape of the orbital. Atomic orbitals are also a region around the nucleus of an atom where the probability of finding an electron is high.

In addition, they are shells in an atom containing valence electrons and can be identified by a unique combination of four quantum numbers, which are the same three quantum numbers mentioned above plus the spin quantum number (s).

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Answer:

Ionization energy : energy required to take out an electron from the valance orbital of an atom.

Electron affinity: electron affinity of an atom measures the amount of energy released when an electron is forcibly entered or pushed into the valence orbital of an atom.

Ionization energy is the energy required to make an atom into a positive ion. Electron affinity is the energy released when an atom becomes a negative ion.

ionization energy is what is required to remove one electron from a normal gaseous atom to produce a +1 anion of that atom.

electron affinity is the energy required to remove one electron from a gaseous -1 anion of an atom to produce a normal gaseous atom.

The power output of the circuit is the product of the voltage and current passing through the circuit. Hence the power of the speaker carrying a current of 6.4 A when connected to 120 V is 768 W.

Power is the rate of work done. Its unit is Watt. Power of a device is directly proportional to the current, voltage as well as to the resistance.

The expression relating the power, current and resistance is:

P = I² R

According to Ohm's law, V = I R

Thus, P = I V.

Given that, voltage V = 120 V

current I  = 6.4 A.

Thus power  P = 120 V × 6.4 A = 768 W.

Therefore, the power of the speaker carrying a current of 6.4 A when it is connected to 120 V source is 768 Watt.

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Answer:

15.30 ×10²³ molecules of ammonia

Explanation:

Given data:

Volume of ammonia = 57.0 L

Temperature = standard = 273 K

Pressure = standard = 1 atm

Number of molecules of ammonia = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

1 atm ×57.0 L = n ×0.0821 atm.L/ mol.K   × 273 K

57.0 L.atm =  n × 22.41 atm.L/ mol

n = 57.0 L.atm/22.41 atm.L/ mol

n = 2.54 mol

Number of molecules of ammonia:

1 mole of gas have 6.022 ×10²³ molecules of ammonia.

2.54 mol ×6.022 ×10²³ molecules / 1 mol

15.30 ×10²³ molecules