Is iron man made or natural

Answer:

the boiling point of solution at 3 decimal point is 100.329०C Ans.

Explanation:

given data -

molality of Nacl = 0.321 m

molal boiling point elevation constant (Kb) =0.512०C/m

# formula of change of boiling point of sample =

∆ Tb =i × Kb × m

Kb = molal boiling point of elevation constant

m = molality

i = vont's hoff factor.

Nacl is strong electrolyte and its 100% dissociate so the value of i for Nacl is 2

put value in the formula

∆ Tb = 2 × 0.512 ०C/m × 0.321m

= 0.3287

= 0.329०C

∆Tb = T'b - Tb

T'b = boiling point of solution

Tb= boiling point of solvent( water)

0.329०C = T'b - 100०c ( boiling point of water = 100०C)

T'b = 0.329०C + 100०C

= 100.329०C

hope this helps

If the caffeine concentration in a particular brand of soda is 2.99 mg/oz, drinking, The number of cans of soda would be lethal is 258 cans.

Caffeine is a stimulant. In the brain, it blocks the effects of a chemical called adenosine, which makes you feel sleepy. we then feel more alert and energetic, which is why many people drink soda, coffee or tea to stay awake. Caffeine may keep you awake even if you don't want it to

Given

v = 10 000/3.23 =3095.96 oz

Therefore,

Number of cans = 3095.96 /12 =258 cans

If the caffeine concentration in a particular brand of soda is 2.99 mg/oz, drinking, The number of cans of soda would be lethal is 258 cans.

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Answer:

Fe₂O₃ + 3Zn → 2Fe + 3ZnO

Explanation:

Step 1: RxN

Fe₂O₃ + Zn → Fe + ZnO

Step 2: Balance RxN

We need 2 Fe's on both sides.

We also need 3 O's on both sides.

Fe₂O₃ + 3Zn → 2Fe + 3ZnO

The balanced chemical equation for the reaction between strontium and oxygen can be written as follows: 2 Sr (s) + \(O_2\)(g) → 2 SrO (s).

In this equation, solid strontium (Sr) reacts with gaseous oxygen (\(O_2\)) to produce solid strontium oxide (SrO).

To determine the mass of product expected to form in this reaction, we need to consider the molar ratio between strontium and strontium oxide. From the balanced equation, we can see that 2 moles of strontium react to produce 2 moles of strontium oxide.

The molar mass of strontium (Sr) is 87.62 g/mol, and the molar mass of strontium oxide (SrO) is 119.62 g/mol. Since the molar ratio is 1:1 between strontium and strontium oxide, the mass of strontium oxide formed will be equal to the mass of strontium used.

In this case, the student added 4.93 g of strontium to the crucible. Therefore, the expected mass of strontium oxide formed will also be 4.93 g.

It's important to note that this calculation assumes that the reaction proceeds to completion, meaning that all of the strontium reacts with oxygen. In actual laboratory conditions, the yield of the reaction may be less than 100% due to factors such as incomplete reaction, side reactions, or product loss.

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Answer:

the answer is A. cooking the eggs

Answer:

A. Cooking the eggs

Explanation:

Cooking the eggs is a chemical change because it's a permanent change. There's no way to get the eggs back in its original form as an egg. Breaking the egg, stirring the egg, or even putting spices on the eggs are all examples of physical changes because they don't change the eggs' chemical composition. They only change its appearance.

To name this ion, we need to follow up the steps:

Step 1: F is the symbol for fluorine.

Step 2: For anions, change the ending to -ide and add the word ion after it. Since it is an anion, drop the -ine and replace it with -ide.

Therefore, this is a fluoride ion.

Types of luminous flames:

1. Yellow Luminous Flame

2. Smoky Luminous Flame

3. Orange Luminous Flame

4. Blue Luminous Flame

Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:

1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.

2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.

3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.

4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.

It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.

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You would recover 36.525g of NaCl after evaporating all of the water.

To find the grams of NaCl that would be recovered after evaporating all the water, we can use the following formula:

mass = moles * molar mass

Where:

Moles = Molarity * Volume

Molarity = 0.250 M

Volume = 2500.0 mL = 2.5 L

Molar mass of NaCl = 58.44 g/mol

mass = 0.250 M * 2.5 L * 58.44 g/mol

mass = 36.525 g

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The new volume of the balloon after heating it to a temperature of 51 °C is approximately 2.39 L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Given that:

Substituting the given values and solve for V₂:

\(V_1T_2 = V_2T_1\\\\V_2 = \frac{V_1T_2}{T_1} \\\\V_2 = \frac{2.2\ *\ 324.15}{298.15 }\\ \\V_2 = 2.39 \ L\)

Therefore, the final volume is 2.39 litres.

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Answer:

The total amount of Au is $ \(2.0\times10^{24}\)

Explanation:

Given that,

Mass of 1.0 ml of Au \(m=4\times10^{-2}\ g\)

Total volume of water in oceans \(V=1.5\times10^{21}\ L\)

We need to calculate the volume in ml

Using given volume

\(V=1.5\times10^{21}\times1000\ mL\)

\(V=1.5\times10^{24}\ mL\)

We need to calculate the total mass of Au  

Using given data

\(1\ ml\ volume = 4\times10^{-2}\ g\)

\(1.5\times10^{24}\ ml=4\times10^{-2}\times1.5\times10^{24}\)

So, The total mass of Au is \(6\times10^{22}\ g\)

The mass will be in ounce,

\(Mass=0.035274\times6\times10^{22}\)

\(Mass=2.12\times10^{21}\ ounce\)

The total amount of the Au Will be

\(Total\ amount=2.12\times10^{21}\times948\)

\(Total\ amount=2.0\times10^{24}\)

Hence, The total amount of Au is $ \(2.0\times10^{24}\)

Answer: The final temperature is \(38.0^0C\)

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

\(heat_{released}=heat_{absorbed}\)

\(Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})\)

\(-[m_1\times c_1\times (T_{final}-T_1)]=[m_2\times c_2\times (T_{final}-T_2)]\)

\(-[m_1\times (T_{final}-T_1)]=[m_2\times (T_{final}-T_2)]\)   (as \(c_1=c_2\))

Q = heat absorbed or released

\(m_1\) = mass of water at \(85.0^0C\) = \(volume\times density=41.0ml\times 1g/ml=41.0g\)

\(m_2\) = mass of water at \(26.0^0C\) = \(volume\times density=161.0ml\times 1g/ml=161.0g\)

\(T_{final}\)  = final temperature = ?

\(T_1\)   = temperature of 41.0 ml of water = \(85.0^0C\)

\(T_2\)   = temperature of 161.0 ml of water = \(26.0^0C\)

Now put all the given values, we get

\(-[41.0\times (T_f-85.0)^0C]=161.0\times (T_f-26.0)^0C\)

\(T_f=38.0^0C\)

Thus the final temperature is \(38.0^0C\)

Answer:

answer

Explanation:

An object that has a small mass and an object that has a large mass have the same momentum. ... Since the kinetic energy of an object is momentum times of speed. Therefore, for the same momentum, the mass of higher speed will have more energy i.e. the smaller mass.

Answer:

Bathtub

Explanation:

Even though the water in a filled bathtub may be at the same temperature as water in a glass, the water in the bathtub has more thermal energy because it contains a greater number of water molecules.

Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.

Thus, They are additionally known as limiting reactants or limiting agents. A predetermined quantity of reactants are necessary for the reaction to be completed, according to the stoichiometry of chemical reactions.

In the aforementioned reaction, 2 moles of ammonia are created when 3 moles of hydrogen gas react with 1 mole of nitrogen gas.

In most cases, this reactant dictates when the reaction will end. The reaction stoichiometry can be used to determine the precise quantity of reactant that will be required to react with another element. The limiting agent is determined by the mole ratio rather than the mass of the reactants.

Thus, Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.

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At constant temperature and pressure, 100mL of ammonia will be produced.

Ammonia is described as an inorganic compound of nitrogen and hydrogen with the formula NH₃. It is a stable binary hydride, and the simplest pnictogen hydride, ammonia is a colorless gas with a distinct pungent smell.

Gay-Lussac's law of combining volumes states that the volume of gases which take part in a chemical reaction bear a simple whole number ratio to one another and to the volume of products if gaseous, when measured at constant temperature and pressure.

According to the Equation of reaction: N₂(g) + 3H₂(g) ----> 2NH₃(g)

From the equation of reaction given above,

1 mole of nitrogen gas reacts with 3 moles of hydrogen to produce 2 moles of ammonia. Therefore,

50 mL of nitrogen will react to produce produce 2 * 50 mL of ammonia = 100ml of ammonia

Also, 150mL of hydrogen will react to produce 2 *150mL/3 of ammonia = 100ml of ammonia.

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Answer:

A) the CH3 group

Explanation:

The proximity of unsaturated groups (C=C, C=O, aromatic) and electronegative atoms (O, N, halogen) has an impact on the proton NMR chemical shift. Electronegative groups shift to the left (down field; ppm rise).

The chemical shift in nuclear magnetic resonance (NMR) spectroscopy refers to the atomic nucleus' resonant frequency in relation to a standard in a magnetic field. The location and quantity of chemical changes frequently serve as diagnostic indicators of molecular structure.

You take into account the chemically non-equivalent proton(s) one at a time while making chemical shift predictions. Find the origin of each proton or proton pair that is not chemically comparable. Whether the proton(s) is/are linked to a methyl, methene, or methine determines the beginning point.

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Digital waves are commonly used in high-frequency wireless networks instead of analog waves because digital signals are less susceptible to interference from obstacles and noise.

Analog signals vary continuously over time and can be affected by various forms of interference, such as distortion or attenuation, which can result in the loss or corruption of information.

In contrast, digital signals are represented as a series of discrete values or binary digits, which are more resilient to interference and can be easily reconstructed at the receiving end. Digital signals are also easier to compress, allowing for more efficient use of the available bandwidth and higher data transfer rates.

Therefore, digital signals are the preferred choice for high-frequency wireless networks as they provide reliable, high-speed data transmission while minimizing the impact of interference and signal loss caused by obstacles.

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Note : The search engine could not find the complete questions.

Answer:

Cs and I

Explanation:

Salts are formed when an ionic bond is formed between two elements in the compound. Let us recall that the kind of bond formed between any two elements depends on the magnitude of electronegativity difference between the two elements.

Among the options listed, the highest degree of electronegativity difference occurs for the bond between Cs and I. This implies that this bond is ionic and the combination of the two elements will lead to salt formation.

Answer:

Cs and I

Explanation:

just took the test :D

Answer:

-, from, to, exothermic

Explanation:

When 1.0 mole of MgSO₄ is dissolved in water contained in a calorimeter, the temperature of the water and dissolved ions increases.

Therefore the sign of ΔH for this reaction is "-". By convention, for exothermic reactions, the enthalpy has a negative sign.

Heat is transferred from the system to the surroundings. This heat, released by the system, is absorbed by the surroundings and used to raise their temperature.

The reaction is classified as exothermic.

The branch of science which deals with chemical bonds is called chemistry.

The correct answer to the question is rancidity.

The process of decomposition of the edible items in presence of air which gives a bad odor is called rancidity.

The canned baked items are less prone to rancidity because they have preservation and nitrogen gas in them which prevent them from decomposition.

When the food reacts with the air it starts to decomposition due to oxidation.

Hence, canned baked last longer than the can in the air.

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M = n/V

V = n/M

V = (14.5 : 56.1056)/2.8

V = 0.0923 L = 92.3 mL

Answer:

Partial lunar eclipse.

Explanation:

A lunar eclipse is a cosmological event by which, in the presence of the Earth between the Sun and the Moon, the latter does not receive the light of the Sun in the totality of its visible face, with which a part (or the totality ) of her is in the dark.

Thus, if the lunar eclipse implies an absence of sunlight in the entire lunar surface, the eclipse will be total, while if the eclipse implies an absence of light only in part, the eclipse will be partial (which is the most common event).

At pOH value  of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

In this question we will apply the formula

      pH +pOH = 14 . . . . . . . . . . . . .(1)

where pH = concentration of [\(H^{+}\) ] ion

pOH = concentration of [\(OH^{-}\) ] ion

As per the question

pOH =6.0

Putting the value of pOH in equation (1) we get the value of pH

              pH + 6.0 =14

             pH = 14 -6.0

             pH  = 8.0

 The value of pH if the pOH value is 6.0 is 8.0

To find the concentration of \(H^{+}\) ion we will use the following formula

This is calculated by the formula

                                 [\(H^{+}\)} = \(10^{-pH}\)

where we will write the values of pH

Hence the concentration of [\(H^{+}\)} ion is \(10^{-8}\)

Therefore at  pOH of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

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The complete question is -

What is the pH value and concentration of [\(H^{+}\) ] ion of the following if the pOH value of the solution is 6.0 ?

The mass of the zinc that is required is 184.6 g.

We know that the term reaction has to do with the combination of two substances. Often times, we would have a new substances that is formed which is the product of the reaction.

Let us look at the reaction between zinc and copper II sulfate and that reaction is written as; \(Zn(s) + CuSO_{4} (aq) ------ > ZnSO_{4} (aq) + Cu(s)\)

Number of moles of the copper sulfate = 454 g/159.61 g/mol

= 2.84 moles

Now, the reaction is 1:1  we can see;

Number of moles = mass/molar mass

Mass of Zn = 2.84 moles * 65 g/mol

= 184.6 g

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The partial pressure of the nitrogen gas from the calculation is 4.94 kPa

When all other gases in a mixture are held constant, a gas's partial pressure is the pressure it exerts on its own. It is calculated by dividing the total pressure of the gas mixture by the percentage of the mixture's total volume occupied by the specific gas.

Partial pressure of nitrogen = Total pressure - (Partial pressure of carbon dioxide + Partial pressure of oxygen + Partial pressure of other gases)

= 101.3 - (21.22 + 75.1 + 0.04)

= 4.94 kPa

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Answer:

0.083 M

Explanation:

We'll begin by calculating the number of mole in 0.43 g of KHP (potassium hydrogen phthalate, C₈H₅O₄K). This is can be obtained as follow:

Mass of C₈H₅O₄K = 0.43 g

Molar mass of C₈H₅O₄K = (8×12) + (5×1) + (16× 4) + 39

= 96 + 5 + 64 + 39 = 204 g/mol

Mole of C₈H₅O₄K =?

Mole = mass / molar mass

Mole of C₈H₅O₄K = 0.43 / 204

Mole of C₈H₅O₄K = 0.002 mole

Next, we shall determine the number of mole of NaOH required to react with 0.43 g (i.e 0.002 mole) of KHP. This can be obtained as follow:

C₈H₅O₄K + NaOH → C₈H₄O₄KNa + H₂O

From the balanced equation above,

1 mole of KHP reacted with 1 mole of NaOH.

Therefore, 0.002 mole of KHP will also react with 0.002 mole of NaOH.

Next, we shall convert 24.11 cm³ to L. This can be obtained as follow:

1000 cm³ = 1 L

Therefore,

24.11 cm³ = 24.11 cm³ × 1 L / 1000 cm³

24.11 cm³ = 0.02411 L

Finally, we shall determine the molarity of NaOH. This can be obtained as follow:

Mole of NaOH = 0.00 2 mole

Volume = 0.02411 L

Molarity of NaOH =?

Molarity = mole /Volume

Molarity of NaOH = 0.002 / 0.02411

Molarity of NaOH = 0.083 M

Answer:

eight electrons

Explanation:

Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule. Some atoms can be stable with an octet even though their balance she'll is the 3n shell, which can hold up to 18 electrons.