A bag contains five balls numbered from 1 to 5. Another bag contains three balls numbered from 1 to 3. A ball is drawn randomly from each bag and the numbers on the two balls are summed up to find the outcome. This outcome is denoted with a random variable X. Give the range space for X.

Answer:

The sample has high iron content.

Explanation:

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The specific heat capacity at constant volume of water vapor is calculated to be 33.1 J/mol·K.

In thermodynamics, heat capacity is defined as the amount of heat required to raise the temperature of a substance by 1 degree celsius.

And, the amount of heat required to raise the temperature of 1 kg of a substance by 1 degree celsius is known as specific heat capacity.

The SI unit of specific heat capacity is SI is joule for every kelvin per kilogram i.e JK⁻¹Kg⁻¹.

For example, the specific heat capacity of water is 4184 JK⁻¹Kg⁻¹, since it takes 4184 joules of energy in order to increase the temperature of 1 kg of water at temperature 1 K.

The specific thermal capacity varies frequently with temperature which can be calculated using the equation:

Cv = 3/2 (R) + 3/2 (R) + 0

R is the gas constant  whose value is 8.314 J/mol·K

Therefore, Cv = 33.1 J/mol·K.

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Answer:

Yes yes i have.

Explanation:

Dont quite understand the way you worded the sentence but ok-

did u ever think that rocks could be squishy and when something touches them they become hard?

or that if we cant see wind...can fish not see water?

In conclusion, d. Arginine is the amino acid with the highest isoelectric point, at 10.76.

The amino acid that has its isoelectric point at the highest pH is d. Arginine. An amino acid is an organic compound that contains both an amino (-NH2) and a carboxyl (-COOH) functional group. It also has a side chain (R group) that is unique to each of the 20 different amino acids.

The isoelectric point (pI) is the pH at which the amino acid has a net zero charge. This is the pH at which it does not migrate in an electric field. An amino acid is positively charged when the pH is less than the pI and negatively charged when the pH is greater than the pI.

Arginine is an amino acid that has a positively charged guanidine group in its side chain. It is an essential amino acid, which means that the body cannot synthesize it and must obtain it from food. The isoelectric point of arginine is 10.76, which is higher than that of the other amino acids listed:

Lysine has a pI of 9.74

Histidine has a pI of 7.59

Threonine has a pI of 5.6

Alanine has a pI of 6.11

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Answer: Hello! I'm Jungkook. Here is your answer.....

1 Atom.

Explanation:

Hope this helps! Anneyong/Bye!

xoxoKookie

Answer:

B

Explanation:

The volume of 12 M NaOH and 2 M NaOH should be mixed to get 2 litres of 9 M NaOH solution is 1.4 L and 0.6 L

What is Concentration ?

In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture.

Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration.

Amount of stuff = concentration x volume.

We can set up 2 equations:

(12×V₁) + (2×V₂) = 9×2 = 18

12V₁ + 2V₂ = 18 (1)

V₁ + V₂ = 2 (2)

From (2) we get:

V₁ = (2 − V₂)

Substituting  V₁ back into (1)  ⇒

12 (2−V₂) + 2V₂ = 18

24 − 12V₂ + 2V₂ = 18

10V₂ = 6

V₂ = 0.6L

From (2) we can say:

V₁ + 0.6 = 2

V₁ = 2 − 0.6 = 1.4L

Therefore, The volume of 12 M NaOH and 2 M NaOH should be mixed to get 2 litres of 9 M NaOH solution is 1.4 L and 0.6 L

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Oxygen gas O2 is a compound, a molecule and a pure substance.

Oxygen gas is a compound because it contains more than one atom( two oxygen atoms) that are chemically combined together.

Oxygen gas is a molecule because it can exist independently as a unit and the oxygen atoms are covalently bound.

It is a pure substance because it contains only oxygen molecules.

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Answer:

Forces organize matter into patterns. all fundamental forces are noncontract forces  

Explanation:

Forces organize matter into patterns and all fundamental forces are noncontract forces. Hence, options A and B are correct.

The push or pull on an object with mass causes it to change its velocity.

Inertia is the force that holds the universe together.

A contact force is a force which acts on an object coming physically in contact with it.

All four known fundamental interactions are non-contact forces: Gravity is the force of attraction that exists among all bodies that have mass.

Hence, options A and B are correct.

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154.99 moles of HNO3 get dissolved in 100ml of water when 10.0 ml of conc. HNO3 (15.5M) is added to it.

Since nitric acid is a moderately potent acid, we assume that the water solvent undergoes complete protonolysis in accordance with the equation:

\(HNO_{3}(aq) + H_{2}O(l)\)  ⇄ \(H_{3}O^{+} + NO_{3}^{-}\)

To the right is where the equilibrium is.

The aqueous solution is now stoichiometric for hydronium ion and nitrate ion, regardless of the initial nitric acid concentration.

V1 (Volume of nitric acid)  = 10.0ml

M1 (Molarity of nitric acid) = 15.5M

V (Volume of Water)  = 100.0ml

n (no. of moles of HNO3 dissolved)  = ?

1) For dilution : M1V1 = M2V2

where : V2 = total volume of the final solution

             M2 = molarity of the final solution

2) Molarity  = ( no. of moles (mol) ) / ( total volume of the solution (l) )

Molar mass of HNO3 = 63.01g

\(M1*V1 = M2*V2 = > M2 = \frac{M1*V1}{V2} \\\\= > M2 = \frac{15.5*10}{110} mol ml^{-1} \\\\= > M2 = 1.409 mol ml^{-1}\\\)

Now, calculate the no. of moles dissolved in the solution :

\(M2 = \frac{n}{V} \\\\= > 1.409 mol ml^{-1} = \frac{n}{110} ml \\\\= > n = 1.409 * 110 mol\\\\= > n = 154.99 mol\)

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I am going to put them in order

R r

R RR rR

r rR rr

Answer:

40. B

41. B

Explanation:

Copper is a good insulator and conducts electricity.

The correct answer is D. are made up of at least two substances

The option that give the characteristics of colloids in the question is that they are made up of at least two substances

Therefore, the last option among the given options is correct.

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Answer:  Mass is 2,37 kg

Explanation: Weight G = mg, and g = 9.81 m/s² on Earth.

m = W/g = 23.2 N /  9.81 m/s²

Answer:

20 atoms

Explanation:

There are 4 in H2O2 because of 2 hydrogens and 2 oxygens.

Then, multiply by 5 because the coefficient is 5, therefore there are 5 H2O2 molecules.

5 x 4 = 20

The total number of atoms in the chemical formula 5H₂O₂ is 20.

The term chemical formula is defined as a way of presenting information about the chemical proportions of atoms that represent a particular chemical compound or molecule, applying chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas.

There are three types of chemical formula that are structural, molecular and empirical chemical formula.

There are four atoms in H₂O₂ because of two atoms of hydrogen and two atoms of oxygen. Then, multiply by five because the coefficient is five, therefore there are 5 H₂O₂ molecules.We get,

= 5 x 4

= 20

Thus, The total number of atoms in the chemical formula 5H₂O₂ is 20.

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Answer:

These are Kepler's Laws of Planetary Motion

Explanation:

Answer:

its Keplers third law,

then first law,

then second law

Explanation:

The two atoms that are isotopes of the same element in this case are Atom 2 and Atom 3. Atom 1, with seven protons, is not an isotope of the same element as Atom 2 and Atom 3 because its atomic number is different.

The term "isotope" refers to atoms of the same element that have a different number of neutrons. In this case, we have three atoms: Atom 1 with seven protons and eight neutrons, Atom 2 with eight protons and seven neutrons, and Atom 3 with eight protons and eight neutrons. To determine which two atoms are isotopes of the same element, we need to compare their atomic numbers.

The atomic number of an element represents the number of protons in the nucleus of its atoms. In this case, Atom 1 has seven protons, Atom 2 has eight protons, and Atom 3 also has eight protons. Since the atomic numbers of Atom 2 and Atom 3 are the same, they are isotopes of the same element.

Isotopes of the same element have the same number of protons, which defines the element itself, but they differ in the number of neutrons. In this case, Atom 2 and Atom 3 both have eight protons, indicating that they are both isotopes of the same element.

To summarize, isotopes are atoms of the same element that have different numbers of neutrons. In this scenario, Atom 2 and Atom 3 are isotopes of the same element because they have the same number of protons (eight) and differ only in the number of neutrons. Atom 1 is not an isotope of the same element as Atom 2 and Atom 3 because its atomic number is different.

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The specific heat of the unknown metal is 0.128 J/g°C. This means that it takes 0.128 joules of energy to raise 1 gram of metal by 1 degree Celsius.

To calculate the specific heat of a metal, the following formula should be used.

Q = m*c*ΔT where:

Q = amount of energy absorbed by the metal

m = mass of metal

c = specific heat of the metal

ΔT = temperature change of the metal

Assume the mass of the metal is 50 g, the amount of energy absorbed by the metal is 6000 J, and the initial and final temperatures of the metal are 25 °C and 955 °C respectively. Therefore, you can substitute these values ​​into expressions.

6000J = 50g x c x (955°C to 25°C)

Simplifying the equation, we get:

6000J = 50g*c*930°C

Dividing both sides by (50g * 930°C) gives:

c = 0.128 J/g°C

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Answer:

a) Secretion of unpleasant liquids which make them distasteful.

Possession of spines or thorns or irritating hairs which cause pain or irritation on contact.

Possession of poisonous parts which cause pain or itching or death or swelling on contact.

b) An anion is a negatively charged atom (or group of atoms).

OR

An anion is an ion formed when an atom (or group of atoms) gain electrons.

c) i. NH4OH and dilute HCL.

= Ammonium chloride, water

ii. CACO3 and dilute HCL.

= Calcium chloride, water, carbon dioxide or carbon (IV) oxide.

Hope it helps. Please mark as brainliest.

Explanation:

Same as cherishdisah's answer. Thanks.

Answer

To convert μg/l to mol/kg?

Step 1: from the mass in grams, find the number of moles by diving the mass by its molar mass

Step 2: To go from L to kg, take the volume given multiply it by density in kg/L

10.5g is the mass of a sample of nickel which melts completely after adding 1560 J of heat during the reaction.

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the exertion of a force. The change caused by a force being applied is smaller the more mass a body has. Despite being connected to mass, weight is distinct from that latter. Weight fluctuates somewhat from place to place since it is essentially the force of Earth's gravitational attraction acting on stuff.

q= m×ΔH

1560  =  m×298

m = 10.5g

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Water and alcohol has no colour. Water has no smell but alcohol smell like musty. Salt more dissolve in water as compared to alcohol.

The water is colourless as well as odorless means it has no smell. Water can dissolve salt because the positive ion of water molecules attracts the negative chloride ions and the negative ion of water molecules attracts the positive sodium ions while on the other hand, the alcohol is colourless means it has no colour. The smell of alcohol is musty and sharp. Salt dissolves less in alcohol, because alcohol molecules have less ions as compared to water. Alcohol is non-polar like oil and salt is polar so it does not dissolve or very little in alcohol.

So we can conclude that Water and alcohol has no colour. Water has no smell but alcohol smell like musty. Salt more dissolve in water as compared to alcohol.

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Answer:

convert the unit of mercury to g/ml. here I attached my answer.

the answer is mercury will sink in water because density of mercury is bigger than water

A ball rolling down a hill has both Kinetic and potential energy. Kinetic energy is due to motion. So if the ball is rolling down it has kinetic energy. Potential energy is the stored energy that is waiting to be used. Now, if you allow it to roll down the hill, it changes that potential energy into kinetic energy (it gets less high and starts to roll faster).

Three types of end products produced during fermentation lactic acid, formic acid, acetic acid durham tube to detect gas produced by microorganisms

Fermentation reacts NADH with an endogenous and organic electron acceptor and common end products of bacterial fermentation include lactic acid, formic acid, acetic acid, butyric acid, butyl alcohol, acetone, ethyl alcohol, carbon dioxide, and hydrogen and fermentation reactions are detected by the color change of a pH indicator when durham tube are mainly used in microbiology to detect gas by microorganism and gas production helps to identify the type of organism and these special tubes are placed upside down in bigger test tubes to detect the presence of gas production

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Explanation:

Technically, the ice cube melts because the water cools down. This may sound ridiculous at first, but you must consider the fact that the ice melts because it has drawn "heat" (energy) from its surroundings. The "surroundings" being the air and water that surround it (but the water's more important since it's a better conductor of thermal energy).

The surrounding air looses energy while the ice in the glass gains energy.

We know that thermal energy is transferred from a hotter body to a cooler body. If we look as the glass, we will notice that the surrounding air has a greater energy compared to the contents of the glass. The surrounding air looses this energy resulting in the condensation of water vapor in air around the glass.

Similarly, the ice in the glass gains energy and melts. A change of state occurs from solid to liquid as a result of the energy absorbed from the surrounding air.

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The standard formation reaction of solid lead(II) nitrate (Pb(NO₃)₂) can be represented by the balanced chemical equation:

Pb(s) + 2 NO³⁻(aq) → Pb(NO₃)₂(s)

In this reaction, solid lead (Pb) reacts with two nitrate ions (NO³⁻) to form solid lead(II) nitrate (Pb(NO₃)₂). The coefficients in the balanced equation indicate the stoichiometric ratios between the reactants and products, ensuring that the equation obeys the law of conservation of mass.

The equation is balanced to ensure that the number of atoms of each element is the same on both sides of the equation. In this case, the equation is already balanced with one lead atom on both sides and two nitrate ions on both sides.

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