Calculate the mass of a object, found in a lab, that has a density of 3.14 g/ml and a volume of 23.6 ml. group of answer choices

Genetic disorders that are extremally dehabilitating

Answer:

How do Newton's laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can pass a puck as quickly as possible? Smooth ice reduces the unbalanced forces that would slow the hockey puck. A skydiver falls toward the ground at a constant velocity.

Explanation:

Answer:

1st one

Explanation:

Answer:

B

Explanation:

chlorine 2×3= 6 not sure

Answer:

It is Excretory system.

:)

According to Lewis dot theory, you would find one lone pair and two bonding pairs of electrons surrounding the central atom of the nitrite ion.

The nitrite ion (NO2-) is composed of a nitrogen atom bonded to two oxygen atoms. According to Lewis dot theory, the central atom (nitrogen) is surrounded by a total of three electron pairs. Two of these electron pairs are involved in covalent bonds with the oxygen atoms, while the third electron pair is a lone pair that resides on the nitrogen atom.

The two bonding pairs of electrons between the nitrogen and oxygen atoms are represented by a single line in the Lewis structure, indicating a single covalent bond. The lone pair of electrons on the nitrogen atom is represented by two dots, or a pair of dots, indicating that these electrons are not involved in bonding.

Overall, the Lewis dot structure for the nitrite ion shows one lone pair and two bonding pairs of electrons surrounding the central atom (nitrogen). This arrangement of electron pairs is important for understanding the shape and polarity of the molecule, as well as its reactivity and chemical properties.

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False. The addition of a solute to a solvent typically lowers the freezing point of the solution compared to the freezing point of the pure solvent.

This is due to the fact that the solute particles interfere with the arrangement of the solvent particles, which makes it more difficult for the solution to freeze. As a result, the solution has to be cooled to a lower temperature in order for it to freeze, which results in a lower freezing point compared to the pure solvent. Freezing point depression is a colligative property, which means that it depends on the concentration of solute particles in the solution, rather than on their chemical nature. When a non volatile  solute (a solute that does not evaporate at room temperature) is dissolved in a solvent, it increases the number of solute particles in the solution. These solute particles interfere with the arrangement of the solvent particles, making it more difficult for the solvent to freeze. As a result, the solution has to be cooled to a lower temperature in order for it to freeze, which results in a lower freezing point compared to the pure solvent. To summarize, the addition of a non volatile solute to a solvent typically lowers the freezing point of the solution, and therefore the statement "The freezing point of the solution is unchanged by the addition of the solvent" is false.

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Answer:

this math en na Abu the they shay ra

Answer:

The definition of chemistry is a branch of science that deals with the form of properties of matter and substances or the interaction between individuals.

The value for ΔG = 18 kJ/mol

Given

ΔH = 27 kJ/mol and ΔS = 0.09 kJ/mol.K

T = 100 K

Required

the value for ΔG

Solution

The spontaneous process of a reaction is based on 2 factors :

ΔG=ΔH-T.ΔS

\(\tt \Delta G=27~kJ/mol-100\times 0.09~kJ/mol.K\\\\\Delta G=18~kJ/mol\)

The volume of CO₂ at STP = 2.8 L

Given

21 gram of sodium hydrogen carbonate-NaHCO₃

Required

Volume of CO₂

Solution

The decomposition of sodium bicarbonate into sodium carbonate, carbon dioxide, and water :

2 NaHCO₃(s) → Na₂CO₃(s) + CO₂(g) + H₂O(g)

mol of NaHCO₃ :

= mass : MW NaHCO₃

= 21 g : 84 g/mol

= 0.25

From the equation, mol ratio of NaHCO₃(s) :CO₂(g) = 2 : 1, so mol CO₂ :

= 1/2 x mol NaHCO₃

= 1/2 x 0.25

= 0.125

At STP, 1 mol gas = 22.4 L, so for 0.125 mol :

= 0.125 x 22.4 L

= 2.8 L

Answer:

First one answer is physical and other remaning chemical

Answer:

Hydrogen is a colorless, tasteless, and odorless gas.  

physical

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Hydrogen is very combustible in the presence of oxygen.  

chemical

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Hydrogen is very reactive with most elements.  

chemical

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Hydrogen is the least dense of all elements.  

physical

Answer:

Fossil fuel

Explanation:

Answer:

2

Explanation:

Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy. Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs.

Answer:

4.74 mol

Explanation:

Molarity = \(\frac{mol}{L}\)

2.01 M = \(\frac{mol}{2.36 L}\)

(2.01 M)(2.36 L) = 4.74 mol

The volume occupied by 0.101 mol of helium gas at a pressure of 0.91 atm and a temperature of 309 K can be calculated using the ideal gas law equation.

The volume can be determined by rearranging the ideal gas law equation, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Rearranging the equation to solve for V, we get V = (nRT)/P. Plugging in the given values, we have

V = (0.101 mol)(0.0821 L·atm/(mol·K))(309 K) / (0.91 atm).

By performing the calculation, the volume is found to be approximately 2.9 liters.

The calculation is based on the ideal gas law, which describes the behavior of ideal gases under certain conditions. In this case, the ideal gas law equation is used to find the volume of helium gas.

The equation relates the pressure, volume, temperature, and number of moles of a gas. By rearranging the equation and plugging in the given values, we can calculate the volume.

The volume is found to be 2.9 liters, indicating the amount of space occupied by 0.101 mol of helium gas at the given pressure and temperature.

It's important to note that this calculation assumes that helium behaves as an ideal gas, meaning that it follows the ideal gas law equation accurately under the given conditions.

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Answer:

Explanation:

3-methyl pentane.

Answer:

the answer is methyl pentane

The affinity of an enzyme for its substrate affects the slope of a Lineweaver-Burk plot, which is a graphical representation of enzyme kinetics.

Lineweaver-Burk plot is a double reciprocal plot, with 1/V (inverse of reaction rate) on the y-axis and 1/[S] (inverse of substrate concentration) on the x-axis. Enzyme affinity for its substrate is represented by the Michaelis-Menten constant (Km), which is the substrate concentration at half the maximum reaction rate (Vmax). A high enzyme affinity means a low Km value, as less substrate is needed to reach half of Vmax. On the Lineweaver-Burk plot, Km corresponds to the x-intercept, while Vmax is the inverse of the y-intercept.

The slope of the Lineweaver-Burk plot is directly proportional to Km/Vmax. When the enzyme has a high affinity for its substrate, the Km value is low. This leads to a decreased slope on the plot. Conversely, a low-affinity enzyme will have a higher Km value, resulting in an increased slope.

In summary, the affinity of an enzyme for its substrate is directly related to the slope of the Lineweaver-Burk plot, with high-affinity enzymes displaying a lower slope and low-affinity enzymes showing a higher slope. This relationship is crucial for understanding enzyme kinetics and evaluating the efficiency of enzymatic reactions.

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0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.

In order to calculate the number of moles of O2 needed to produce 14.2 grams of P4O10 from P, we need to use the equation for the reaction:

P + 5O2 → P4O10

We can calculate the number of moles of O2 needed by using the molar mass of P4O10, which is 284 g/mol. First, we need to calculate the number of moles of P4O10 present in 14.2 grams:

14.2 g/ 284 g/mol

= 0.05 mol.

Now, we can use the mole ratio between P and O2 to calculate the number of moles of O2 needed. The mole ratio is 5:1, meaning that for every 5 moles of O2, 1 mole of P is needed. Therefore, to get 0.05 moles of P4O10 from P, we need 0.05 x 5 = 0.25 moles of O2.

In conclusion, 0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.

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The specific heat of the metal is approximately 0.35 J/(g-°C).

To determine the specific heat of the metal, we can use the principle of heat transfer, which states that the heat gained by the water is equal to the heat lost by the metal. The equation for heat transfer can be expressed as:

qwater = -qmetal

where qwater is the heat gained by the water, and qmetal is the heat lost by the metal.

The heat gained by the water can be calculated using the equation:

qwater = mass of water * specific heat of water * change in temperature

qwater = 155 g * 4.18 J/(g.°C) * (27.2 °C - 25.0 °C)

qwater = 155 g * 4.18 J/(g.°C) * 2.2 °C

qwater = 1442.46 J

Since the heat lost by the metal is equal to the heat gained by the water, we have:

qmetal = -1442.46 J

The heat lost by the metal can be calculated using the equation:

qmetal = mass of metal * specific heat of metal * change in temperature

mass of metal = 41.3 g

change in temperature = 86.7 °C - 27.2 °C = 59.5 °C

-1442.46 J = 41.3 g * specific heat of metal * 59.5 °C

Solving for the specific heat of the metal, we get:

specific heat of metal = -1442.46 J / (41.3 g * 59.5 °C)

specific heat of metal ≈ 0.35 J/(g-°C)

Therefore, the specific heat of the metal is approximately 0.35 J/(g-°C).

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Answer:

influence of a business invironment

Answer:

it's c

Explanation:

When equal masses of ch4(g) and o2(g) are placed in a container, exerting a total pressure of 600 torrs, then the partial pressure of ch4(g) will be 300torr

Let, x gm o2 and ch4 are present

Given,

Total Pressure = 600torr

Number of moles of o2 = x/16

Number of moles of Ch4 = x/16

According to the Daltons law of partial pressure,

Pa =Xa*Ptotal

Xa is the mole fraction of a

Xch4 =\(\frac{x/16}{x/16 +x/16}\)

         =1/2 = 0.5

Pch4 = 0.5×600 = 300torr

Therefore the partial pressure of ch4 will be 300 torr when a total pressure of 600 torr is applied to the mixture.

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Answer:

A thermodynamic quantity equivalent to the capacity of a system to do work.

Explanation:

Answer:

here's the procedure to find it friend

Explanation:

How do you find the mass in grams of an atom?

In order to determine the mass of one atom of an element, you must determine its molar mass, which is its atomic weight on the periodic table in g/mol, and you need to know the relationship between moles and the number of atoms: 1 mol of atoms = 6.022×1023 atoms . Then divide the molar mass by 6.022×1023 atoms/mol .

Answer:

It may leave some chemicals such as herbicides and pesticides in the water

Explanation:

i just took the test

Distillation may leave some chemicals such as herbicides and pesticides in the water. Therefore, option D is correct.

By using selective boiling and condensation, distillation, also known as traditional distillation, is the process of removing the constituents or compounds from a liquid mixture. The process of heating solid materials to create gaseous products is known as dry distillation.

A chemical is purified through distillation by being separated from a non-volatile or less-volatile substance. Because various compounds frequently have different boiling points, when a mixture is distilled, the components frequently separate from the mixture.

Among the many industrial uses of distillation are the production of alcoholic drinks, water purification, and oil refining. Distillation is a physical procedure that removes desired pure compounds from an initial source using heat and other techniques.

Thus, option D is correct.

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Answer:the positive ionic radius is smaller than the neutral atomic radius

Explanation:

Answer:The positive ionic radius is smaller than the neutral atomic radius.

Explanation: just took the test

Answer:

The answer is B

Explanation:

A pipe to the ground

Answer:

Is it Crucible,Test tube,Dropper,Filter funnel, Spatula

Explanation:

The laboratory apparatus is used to experiment with the chemicals and to hold them. To prepare and investigate the pH of the onion sample apparatus required are the crucible, test tube, dropper, filter funnel, and spatula.

pH is the measurement of the hydrogen or the hydroxide ion concentration in the solution to determine the alkaline or acidic nature of the substance.

The pH of the onion solution can be determined by experimenting with the help of the laboratory apparatus and reagents. A crucible is a container that can withstand high temperatures.

A test tube is a glassware used to hold the substance or chemical in it. Similarly, a dropper is used to draw liquids. The filter funnel separates the filtrate or the solution. A spatula can  be used to remove or add the substance.

Therefore, the correct order of the apparatus is the crucible, test tube, dropper, filter funnel, and spatula.

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Answer:

It's the type of radiation that lower frequency waves (such as visible light, microwaves, or radio waves) emit. Non-ionizing radiation is the kind that humans are typically exposed to when using electromagnetic wave-emitting technology, such as mobile phones, TVs, computers, powerlines, or microwaves.

Explanation:

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