32,500 joules are used to boil a sample of water at its melting point what is the mass of the water?

Answer:

It can cause a reflection

Explanation:

Reflection is when incident light (incoming light) hits an object and bounces off. Very smooth surfaces such as mirrors reflect almost all incident light

3.124mg of I-131 is present after 32.4 days.

The 131 I isotope emits radiation and particles and has an 8-day half-life. Orally administered, it concentrates in the thyroid, where the thyroid gland is destroyed by the particles.

What is Half life?

The time required for half of something to undergo a process: such as. a : the time required for half of the atoms of a radioactive substance to become disintegrated.

Half of the iodine-131 will still be present after 8.1 days.

The amount of iodine-131 will again be halved after 8.1 additional days, for a total of 8.1+8.1=16.2 days, reaching (1/2)(1/2)=1/4 of the initial amount.

The quantity of iodine-131 will again be halved after 8.1 more days, for a total of 16.2+8.1+8.1=32.4 days, to (1/4)(1/2)(1/2)=1/16 of the initial quantity.

If the original dose of iodine-131 was 50mg, the residual dose will be (50mg)*(1/16)=3.124mg after 32.4 days.

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Answer:

Volume = 24.9 cm³

Explanation:

To calculate the volume of the piece of aluminum given its mass and density, we can use the following formula:

\(\boxed{{\mathrm{Volume = \frac{Mass}{Density}}}}\).

We are told that the piece of aluminum has a mass of 67.3 grams and that aluminum has a density of 2.70g/cm³. Using this information and the formula above, we can calculate the volume of the piece of aluminum:

Volume = \(\mathrm{\frac{67.3 \ g}{2.70 \ g/cm^3}}\)

             = 24.9 cm³

Therefore the volume of the piece of aluminum is 24.9 cm³.

Azides, cyanides, hydrides, perchlorates, and sulfides are typically reactive reducing agents or oxidizing agents, which can donate or accept electrons and undergo chemical reactions. Therefore the correct option is option D.

Depending on the particular chemical, a different class of compounds may be incompatible with them.

Therefore the correct option is option D.

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Answer:

it would be OA that is negatively charged

Answer:

natural selection

A

Explanation:

I looked it up

if you want the answer urself look up "How has Charles Darwin contributed to the study of evolution?"

One can build a solid foundation of scientific knowledge and methods for world exploration by studying the life sciences.

It will be simpler for you to decide on a career if you are aware of what is significant to you (your values), what you enjoy doing (your interests), and what you are good at (your abilities). Consider the three legs of a stool as being your values, interests, and abilities.

The life sciences are present in so many areas of our lives, including discussions about genetic testing and stem cell research, as well as health care and the environment.

Thus, studying the life sciences can help one lay a strong foundation of scientific knowledge and methodologies for exploring the world.

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The  22.25g of the solid precipitate will form when a solution containing 52.897 g of mercury(ii) perchlorate is allowed to react completely with a solution containing 14.334 g of sodium dichromate .

To determine the mass of the solid precipitate formed, we need to find the limiting reactant in the reaction. The reactant that is completely consumed will determine the maximum amount of product that can be formed.

First, we need to determine the moles of each reactant. We can use the molar mass to convert the given masses to moles.

Molar mass of mercury(II) perchlorate (Hg(ClO₄)₂) = 2 * atomic mass of Hg + 8 * atomic mass of Cl + 16 * 4 * atomic mass of O

Molar mass of mercury(II) perchlorate (Hg(ClO₄)₂)= 2 * 200.59 + 8 * 35.45 + 16 * 4 * 16

Molar mass of mercury(II) perchlorate (Hg(ClO₄)₂)= 723.62 g/mol

Moles of (Hg(ClO₄)₂)  = mass / molar mass

Moles of (Hg(ClO₄)₂)  = 52.897 g / 723.62 g/mol

Moles of (Hg(ClO₄)₂) ≈ 0.073 moles

Molar mass of sodium dichromate (Na₂Cr₂O₇) = 2 * atomic mass of Na + 2 * atomic mass of Cr + 7 * atomic mass of O

Molar mass of sodium dichromate (Na₂Cr₂O₇) = 2 * 22.99 + 2 * 52 + 7 * 16

Molar mass of sodium dichromate (Na₂Cr₂O₇) = 261.97 g/mol

Moles of  (Na₂Cr₂O₇) = mass / molar mass

Moles of  (Na₂Cr₂O₇) = 14.334 g / 261.97 g/mol

Moles of  (Na₂Cr₂O₇) ≈ 0.055 moles

The balanced chemical equation for the reaction is:

3 Hg(ClO₄)₂+ Na₂Cr₂O₇ → 3 HgCrO₄ + 2 NaClO₄

From the balanced equation, we can see that the stoichiometric ratio between Hg(ClO₄)₂ and Na₂Cr₂O₇ is 3:1. Therefore, 3 moles of Hg(ClO₄)₂ react with 1 mole of Na₂Cr₂O₇ .

Since the ratio between moles is 3:1, and we have 0.073 moles of Hg(ClO₄)₂and 0.055 moles of Na₂Cr₂O₇ , Na₂Cr₂O₇ is the limiting reactant.

This means that all of the Na₂Cr₂O₇ will be consumed, and we need to calculate the amount of solid precipitate formed based on this limiting reactant.

The molar mass of (mercury(II) chromate) HgCrO₄= atomic mass of Hg + atomic mass of Cr + 4 * atomic mass of O

The molar mass of (mercury(II) chromate) HgCrO₄= 200.59 + 52 + 4 * 16

The molar mass of (mercury(II) chromate) HgCrO₄= 404.59 g/mol

Moles of  HgCrO₄ formed = moles of Na2Cr2O7

Moles of  HgCrO₄ formed= 0.055 moles

Mass of  HgCrO₄formed = moles of  HgCrO₄* molar mass of  HgCrO₄

Mass of  HgCrO₄formed = 0.055 moles * 404.59 g/mol

Mass of  HgCrO₄formed ≈ 22.25 g

The mass of the solid precipitate ( HgCrO₄) that will form is approximately 22.25 grams.

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Specific Heat of the metal will be = 4.184 J/C

Mass of metal = 28 g

Mass of water = 28 g

Rise in temperature = 23.8 - 19 = 4.8 C

Specific heat of water = 4.184 J/C

Let the specific heat of metal =S

The heat released by metal =mass of metal * specific heat of metal * Change in temperature

\(& =28\times S \times 4.8{ }^{\circ} \mathrm{C} \\& =134.4 S^{\circ} \mathrm{C}\)

Heat absorbed by water = mass of water x specific heat of water x change in temp. \(=28 \times 4.184 \times 4.8=562.3296 J\)

Using the principal of Caloriemeter:

We have, Heat released by metal = Heat absorbed by water

134.4S = 562.3296 =>4.184 J/C

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The correct question should be:

if we are heated a metal with 28g mass then we add it in a coffee cup with 28g water. the water temperature raised from 19 degree to 23.8 oc. what was the specific heat of the metal. the water specific heat of water is 4.184 j/g oc.

Answer:.

Explanation:

The amount of heat produced when 125 g of acetylene C₂H₂ combust in air is –6255.3 KJ

C₂H₂ + 5/2O₂ —> 2CO₂ + H₂O ΔH = –1301.1 KJ/mol

From the balanced equation above,

1 mole of C₂H₂ releases –1301.1 KJ of heat energy

But

1 mole of C₂H₂ = (2×12) + (1×2) = 26 g

Thus,

26 g of C₂H₂ releases –1301.1 KJ of heat energy

From the balanced equation above,

26 g of C₂H₂ releases –1301.1 KJ of heat energy

Therefore,

125 g of C₂H₂ will release = (125 × –1301.1) / 26 = –6255.3 KJ of heat energy

Thus, –6255.3 KJ of heat energy were produced from the reaction.

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Answer:In reality, if we are talking about an object under the influence of the Earth's gravity, the gravitational potential energy of the object will change minutely, even if kept at the same elevation above sea level, because of differences, if it is moved to different positions, due to changes in sub-surface rock masses

Explanation:

Branliest pls :)

Answer: The answer is Solid

Explanation: :)

Answer:

phosphorous acid

Explanation:

PO4 (phsophate) is a polyatomic, so when the subscript changes, so does the name and it becomes phosphite (one less oxygen atom)

if the name of the polyatomic ends in ite, the ending of the acid name becomes ous making it phosphorous acid.

You don't need to worry about the hydrogen in the naming process because it is an oxyacid, where you only really worry about the polyatomic (acid tells you there is hydrogen)

The molecular formula of aluminum hydroxide (Al(OH)3) indicates that there are three hydrogen atoms in one molecule. Therefore, the mass of hydrogen in one mole of aluminum hydroxide is 3.03 g (3 × 1.01 g). Therefore, the correct answer is D. 3.03 g.

To calculate the mass of hydrogen in one mole of aluminum hydroxide (Al(OH)3), we need to determine the number of moles of hydrogen in the compound and then multiply it by the atomic mass of hydrogen.

In one mole of aluminum hydroxide (Al(OH)3), there are 3 moles of hydrogen atoms.

The atomic mass of hydrogen is given as 1.01 g.

Therefore, the mass of hydrogen in one mole of aluminum hydroxide is:

Mass = Number of moles × Atomic mass

Mass = 3 moles × 1.01 g/mol

Mass = 3.03 g

Thus, the correct answer is option D: 3.03 g.

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Answer:

look below

Explanation:

If the temperature of a gas in a sealed container with a fixed number of molecules is increased, the gas will expand. This is because the increased temperature will cause the gas molecules to move more quickly and collide more frequently with the walls of the container. These collisions will exert a greater force on the walls of the container, causing the volume of the container to increase.

If the volume of the container is allowed to vary (i.e., if it is not sealed), then the volume of the container will increase as the temperature is increased. The exact increase in volume will depend on the size of the container and the specific gas that is being heated.

If the temperature of a gas in a 2.0 L sealed container is doubled, the volume of the container will increase, but it is not possible to determine the exact increase in volume without knowing the specific gas that is being heated and the pressure and temperature at which the gas was originally contained.

The amount of charge transferred is 38594 Coulombs.

The chemical reaction for reduction of copper ions is -

\( {Cu}^{+ } \) + \( {e}^{- } \) → Cu where \( {Cu}^{+ } \) represents copper ions, \( {e}^{- } \) represents electrons and Cu is solid copper.

As per the reaction, 1 mole of electron is required for reduction to copper. So, 0.400 mole of copper ions will require 0.400 moles of electron.

Calculating the charge with formula -

Q = n × F, where Q represents charge, n is number of models and F is Faraday constant. Taking F as 96485 C/mole.

Keep the values in formula to find the coulombs of charge.

Q = 0.400 × 96485

Performing multiplication

Q = 38,594 Coulombs

Thus, 38594 Coulombs charge is transferred.

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The soap formed by the reaction of triglycerides and NaOH is :

triglycerides + NaOH + water → soap + glycerol

Triglyceride ester bonds are broken. To form a fatty acid salt, one component of the preceding ester bond binds with the cation of the chemical salt (soap). The remainder bonds to the hydroxyl group of the chemical salt to form an alcohol molecule.

The chemical reaction is :

(C16H31O2)3C3H5 + 3 NaOH → C3H5(OH)3 + 3 C16H31O2Na

Saponification is the chemical reaction that results in soap. During the procedure, animal or vegetable fat is converted into soap (a fatty acid) and alcohol. An alkali solution in water (e.g., sodium hydroxide or potassium hydroxide) as well as heat are required for the reaction.

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The substance of abuse that has an increased risk of respiratory depression when combined with alcohol is opioid. Opioids and alcohol are central nervous system depressants that can lead to dangerous respiratory depression when taken together.

When combined, they can amplify each other's effects, leading to profound central nervous system depression, reduced heart rate, decreased blood pressure, and severe respiratory depression.

Opioids are a class of drugs that include heroin, synthetic opioids, and prescription painkillers such as fentanyl, oxycodone, and hydrocodone.

These drugs attach to opioid receptors in the brain, spinal cord, and other parts of the body, reducing pain signals and producing feelings of pleasure and euphoria.

They can be highly addictive and have a high potential for overdose.

Respiratory depression is a decrease in the rate and depth of breathing that can lead to dangerously low oxygen levels in the body.

Symptoms of respiratory depression include shallow breathing, slow breathing, shortness of breath, blue lips or fingertips, confusion, dizziness, and loss of consciousness. It is a serious medical emergency that requires immediate attention.

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The complete combustion of 1.5 moles of methane (CH4) would require 6 moles of oxygen (O2).

This is because methane is a hydrocarbon and it follows the general equation of combustion for hydrocarbons: CxHy + (x+y/4)O2 → xCO2 + yH2O. In this equation, x and y represent the number of carbon and hydrogen atoms, respectively, in the hydrocarbon.

Therefore, for methane, where x = 1 and y = 4, the equation simplifies to CH4 + (1+4/4)O2 → CO2 + 2H2O. Thus, for 1.5 moles of methane, the equation becomes 1.5CH4 + (1+4/4)1.5O2 → 1.5CO2 + 3H2O.

Since the equation must be balanced, the total amount of oxygen required is 1.5 moles of O2, which is equal to 6 moles.

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There are two fundamental nuclear processes considered for energy production: fission and fusion. Fission is the energetic splitting of large atoms such as Uranium or Plutonium into two smaller atoms, called fission products. To split an atom, you have to hit it with a neutron.

IamSugarBee

Answer:

There are two fundamental nuclear processes considered for energy production: fission and fusion. Fission is the energetic splitting of large atoms such as Uranium or Plutonium into two smaller atoms, called fission pr

Answer:

22.)B. l and lll only

23.)D.sulfuric acid, magnesium, and chocolate chip cookies

and soda pop

Answer:

The oxidation number for sulfur in SO2 is +4.

Explanation:

To find the oxidation number of sulfur, it is simply a matter of using the formula SO2 and writing the oxidation numbers as S = (x) and O2 = 2(-2) = -4. Using the rule and adding the oxidation numbers in the compound, the equation becomes x +(-4 ) = 0. Solving for x, it is evident that the oxidation number for sulfur is +4.

In this question, we have a situation where an ice cube is placed in a glass of hot water, which means we have a situation of exothermic and endothermic reactions occurring.

The endothermic reaction will be related to the ice cube, since this cube will increase its temperature, and in order to do that, the cube needs to absorb energy, and this thermal energy will come from the hot water

The exothermic reaction is the hot water releasing this thermal energy to its surroundings, and then the temperature will decrease as well

The options that are the answers will be:

C

F

Letter B should be the opposite, -qwater = qice, and letter A doesn't show the positive or negative sign

The numeric value of one Gigameter ( Gm) is equal to 10⁹m.

The metric system can be described as a system of measurement that uses the liter, meter, and gram as base units of metric length, capacity, and weight respectively.

In the metric system, the SI unit of length can be defined as a meter which is defined as the metric length of the path that is traveled by light in a vacuum within 1⁄299792458 seconds.

Some of the other units include Kilometres, Nanometer, Millimetres, Centimetres, Meters, and Decimeters. For example, to convert 5 Gm into meters. We have to multiply with 10⁹.

5 Gm = 5 × 10⁹ m

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Answer:

48.049 kJ or 48049 J

Explanation:

Hello again.

So we know the formula \(q = mc\Delta t\). c is the heat capacity but this time, it is not given. However, water has a very well known heat capacity which is 4.184 J/(g°C). This is in fact the number we refer to a calorie which is the amount of energy you burn that can raise the temperature of 1g of water by 1°C. So, plugging in values, you get the above. But double check if I am wrong.

The amount of heat energy needed to cause this rise in temperature is 48.049 kJ or 48049 J.

Heat is the energy that moves from one body to another when temperatures are different. Heat passes from the hotter to the colder body when two bodies with different temperatures are brought together.

A given amount of matter's heat capacity is the amount of energy needed to raise its temperature by one degree Celsius.

The heat energy will be calculated by the formula

Q = m•C•ΔT

Where c is the heat capacity.

The m is the mass

T is the time

Mass is 348 grams

Temperature is 37°C

The change in temperature is 4.0°C to 37°C

The heat capacity of water is 4.184

Q = 348 x 4.184 x -33 = 48049.056.

Therefore, the amount of heat energy needed is 48.049 kJ or 48049 J.

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Single displacement in acid properties is a kind of oxidation-reduction chemical reaction.

A chemical reaction is a process that leads to the transformation of one set of chemicals into another chemical. It is also known as a single replacement reaction.

It is a reaction in which one element is substituted with another element. When a replacement reaction occurs, a pure element and an aqueous compound are formed. It is denoted as:

      A + BC ⇒ AC + B   were, A and B are pure elements.

Acids react with metals to form salt and hydrogen gas. The metals that are more active than acids can undergo a single displacement reaction. Due to this, the acid will be replaced by the metal, but it does not apply to less reactive metals.

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The volume of 8.8g of carbon dioxide at STP is 4.38 L.

1 mole of any gas will take up 22.4 L of space at standard temperature and pressure (STP). A balanced chemical equation and the Ideal Gas Law can be used to determine the amount or mass of gas consumed or created in a chemical process.

n = m/M

where m is the molar mass of carbon dioxide and M is its mass in terms of molecules.

Considering that the molar mass of carbon dioxide is 44.01 g/mol:

n = 8.8 g / 44.01 g/mol

n = 0.1998 mol

Next, we can plug in the values of n, R, P, and T into the ideal gas law and solve for V:

V = (nRT)/P

V = (0.1998 mol x 0.0821 L·atm/(mol·K) x 273.15 K) / 1 atm

V = 4.38 L

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Answer:

I think it has to do with batteries 'n stuff

AH— Ampere Hour