melt-away creamery combines sugar, cream, and the best natural flavorings, then churns and freezes the resulting mixture at a very low temperature, creating ice cream. the method melt-away uses is an example of

Therefore, we need 180.00 g of NaOH to make 750.0 ml of 6.0M solution.

To calculate the mass of NaOH needed to make a 6.0M solution in 750.0 ml of water, we need to use the formula:
Molarity = moles of solute / volume of solution in liters
We know the volume of solution is 750.0 ml, which is 0.75 L. We also know the molarity is 6.0M. Rearranging the formula, we get:
moles of solute = Molarity x volume of solution in liters
moles of solute = 6.0M x 0.75 L
moles of solute = 4.5 mol
Now, we need to calculate the mass of NaOH, using its molar mass. The molar mass of NaOH is 40.00 g/mol.
mass of NaOH = moles of solute x molar mass
mass of NaOH = 4.5 mol x 40.00 g/mol
mass of NaOH = 180.00 g
Now, to determine if the solution is acidic, basic or neutral, we need to find its pH value. A 6.0M solution of NaOH is a strong base and completely dissociates in water. This means that the solution has a pH value greater than 7, indicating that it is a basic solution.

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The new freezing point of the solution is -0.01597 °C and the new boiling point is 100.004 °C.

To determine the new freezing and boiling point of the solution, we need to use the equation:

ΔTf = Kf × m

ΔTb = Kb × m

Where:

ΔTf = the change in freezing point

ΔTb = the change in boiling point

Kf = the freezing point depression constant for the solvent = 1.86 °C/m

Kb = the boiling point elevation constant for the solvent = 0.512 °C/m

m = molality of the solution = moles of solute per kilogram of solvent

First, we need to calculate the molality of the solution:

58.5 g of H₂S is the solute, and it has a molar mass of 34.08 g/mol. Therefore, the number of moles of H₂S is:

moles of H₂S = 58.5 g / 34.08 g/mol = 1.717 mol

The mass of water is given as 200 kg, which is equivalent to 200,000 grams.

molality = moles of solute/kilograms of solvent

molality = 1.717 mol / 200 kg = 0.008585 mol/kg

Now, we can calculate the change in freezing point and boiling point:

ΔTf = Kf × m = 1.86 °C/m × 0.008585 mol/kg = 0.01597 °C

ΔTb = Kb × m = 0.512 °C/m × 0.008585 mol/kg = 0.004393 °C

To find the new freezing point, we need to subtract the change in freezing point from the freezing point of pure water (0°C):

New freezing point = 0°C - ΔTf = 0°C - 0.01597 °C = -0.01597 °C

To find the new boiling point, we need to add the change in boiling point to the boiling point of pure water (100°C):

New boiling point = 100°C + ΔTb = 100°C + 0.004393 °C = 100.004 °C

Therefore, the new freezing point of the solution is -0.01597 °C and the new boiling point is 100.004 °C.

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Therefore, the compound that would form a precipitate is option D, NaOH.

A precipitate is a solid that forms from a chemical reaction between two or more liquids or solutions. This solid typically forms when two solutions are mixed together and a chemical reaction occurs that causes one of the products to become insoluble in the mixture, resulting in a solid that falls out of the solution and settles at the bottom. Precipitates can vary in size, shape, and color depending on the specific chemical reaction and the properties of the substances involved.

Here,

To determine which of the given compounds would form a precipitate, we need to know the solubility rules for common ionic compounds. Here are the rules for the given ions:

Li2CO3: carbonates are generally insoluble, but Li2CO3 is an exception and is soluble in water

AgBr: silver halides (AgCl, AgBr, AgI) are generally insoluble, so AgBr would form a precipitate

Cr(NO3)2: nitrates (NO3-) are generally soluble, so Cr(NO3)2 would dissolve in water and not form a precipitate

NaOH: hydroxides (OH-) of Group 1 and most Group 2 metals are soluble, but NaOH is an exception and is only slightly soluble, so it would form a precipitate

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electron shell

Explanation:

The correct relationship between the molecular formula and the empirical formula for C2H10N2 is that the empirical formula is CH5N.

The molecular formula represents the actual number of atoms of each element in a compound, while the empirical formula represents the simplest ratio of the atoms of each element in a compound. To determine the empirical formula, we need to divide the subscripts in the molecular formula by their greatest common divisor.

In the molecular formula C2H10N2, we divide the subscripts by 2 to get the simplest ratio. This gives us the empirical formula CH5N. The subscripts in the empirical formula represent the number of atoms of each element in one molecule of the compound.
Therefore, the correct relationship between the molecular formula C2H10N2 and the empirical formula CH5N is that the empirical formula represents the simplest ratio of atoms in the compound.

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Answer:

270

Explanation:

Once you add more mass to something the mass doesn’t go away you add more mass.

hope this helps!

Approximately 200.18 grams of gallium oxide will be produced when 150 grams of gallium reacts with excess oxygen.

To determine the mass of gallium oxide produced when 150 g of gallium reacts with excess oxygen, we need to understand the balanced chemical equation for the reaction between gallium and oxygen.

The balanced equation for the reaction is:

4 Ga + 3 O2 → 2 Ga2O3

From the balanced equation, we can see that 4 moles of gallium react with 3 moles of oxygen to produce 2 moles of gallium oxide (Ga2O3).

To calculate the mass of gallium oxide produced, we need to follow these steps:

Convert the mass of gallium (150 g) to moles.

The molar mass of gallium (Ga) is 69.72 g/mol. Therefore, the number of moles of gallium is:

Moles of gallium = Mass of gallium / Molar mass of gallium

= 150 g / 69.72 g/mol

≈ 2.15 moles

Determine the mole ratio between gallium and gallium oxide.

From the balanced equation, we know that 4 moles of gallium react to form 2 moles of gallium oxide. Therefore, the mole ratio is 4:2, which simplifies to 2:1.

Calculate the moles of gallium oxide produced.

Since the mole ratio is 2:1, the number of moles of gallium oxide produced is half the number of moles of gallium:

Moles of gallium oxide = 2.15 moles / 2

≈ 1.07 moles

Convert moles of gallium oxide to mass.

The molar mass of gallium oxide (Ga2O3) is 187.44 g/mol. Therefore, the mass of gallium oxide produced is:

Mass of gallium oxide = Moles of gallium oxide * Molar mass of gallium oxide

= 1.07 moles * 187.44 g/mol

≈ 200.18 g

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In the given reaction, the Copper(Cu) element is getting oxidized and the Nitrogen(N) element is getting reduced.

Any chemical reaction in which the oxidation number of a participating chemical species changes is called a redox reaction. Redox reaction is also called oxidation-reduction reaction. The formation of hydrogen fluoride is an example of a redox reaction.

The given reaction occurs as

\(\rm Cu+HNO_3 \rightarrow Cu(NO_3)_2 + NO + H_2O\)

The given reaction is an example of a redox reaction.

A balanced chemical equation is:

\(\rm 3Cu+8HNO_3 \rightarrow 3Cu(NO_3)_2 + 2NO + 4H_2O\)

Now, we write the oxidation number of chemical species involved in the reaction as

\(\rm3 \overset{0}Cu + 8\overset{+1}H\overset{+5}N\overset{-2}{O_3} \rightarrow 3\overset{+2}Cu(NO_3)_2 + 2\overset{+2}NO + 4H_2O\)

From the above reaction, we can say that,

the oxidation number of the copper element(Cu) increases from \(0 \to +2\)

the oxidation number of the nitrogen element(N) decreases from \(+5\to+2\)

We know that,

Oxidation: increase in oxidation number

Reduction: decrease in oxidation number

So, from the above, we can conclude that, in the given reaction, the copper element(Cu) is getting oxidized and the nitrogen element(N) is getting reduced.

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Answer:

Single-Replacement Reaction

General Formulas and Concepts:

Types of Reactions

Explanation:

Step 1: Define reaction

CaCl₂ + F₂ → CaF₂ + Cl₂

Step 2: Identify backplate

Single-Replacement Reactions: A + BC → AB + C

BC = CaCl₂

A = F₂

AB = CaF₂

C = Cl₂

Answer:

. For each metal that participated in a chemical change, write the type of metal it is, based on yourexamination of the periodic table.Answer: Ammonium Vanadate appears to be mostly a post transition metal. Manganese sulfate also hasmore post transition atoms than transition atoms. Iron nitrate is a transition metal. The cobalt nitrate is atransition metal. Copper nitrate is a transition metal. Zinc nitrate is also a transition metal.(5 points)3. Were there any metallic compounds that did not react with either the acid or the base? Write the type ofmetal, based on your examination of the periodic table.4. Make a general statement about the reactivity of the metals in this experiment.Answer: The transition metals in this experiment were all reactive when mixed with one of the twosubstances. The alkali and alkaline earth metals, however, did not react at all.

Explanation:

Answer:

How do ecosystems respond to natural disasters such as fires and floods :

Explanation:

They recover in stages, gradually returning to the original system. … She plans to create various physical and biological disturbances in the ecosystem to see how populations change over time.

Boyle's law, also known as Mariotte's law, is a relationship describing how a gas will compress and expand at a constant temperature.

Thus, The pressure (p) of a given quantity of gas changes inversely with its volume (v) at constant temperature, according to this empirical connection, which was established by the physicist Robert Boyle in 1662.

In equation form, this means that pv = k, a constant. The French physicist Edme Mariotte also found the connection.

With the assumption of an ideal (perfect) gas, the law can be derived from the kinetic theory of gases. At sufficiently low pressures, real gases follow Boyle's law, albeit at higher pressures, when the gas starts to deviate from ideal behaviour, the product pv typically drops off slightly.

Thus, Boyle's law, also known as Mariotte's law, is a relationship describing how a gas will compress and expand at a constant temperature.

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Isoelectronic series in order of decreasing radius : O^2- > F^- > Na^+ > Mg^2+ > Al^3+

The isoelectronic series consists of ions with the same number of electrons, but different numbers of protons. The size of an ion depends on the number of electrons it has and the strength of the attraction between the electrons and the nucleus.

Therefore, to arrange the given isoelectronic series in order of decreasing radius, we need to consider the effective nuclear charge (Zeff) experienced by each ion.

Zeff is the net positive charge experienced by an electron in an atom or ion. It takes into account the number of protons in the nucleus and the number of shielding electrons between the nucleus and the electron being considered.

The larger the Zeff, the stronger the attraction between the nucleus and the electrons, and the smaller the radius of the ion.So, let's arrange the given ions in order of decreasing Zeff:

Al^3+ > Mg^2+ > Na^+ > F^- > O^2-

This is because Al^3+ has the highest positive charge (13 protons) and the least number of electrons (10) in the given series, resulting in the highest Zeff. On the other hand, O^2- has the least positive charge (8 protons) and the most number of electrons (10) in the series, resulting in the lowest Zeff.

Now, to rank the ions from largest to smallest, we need to reverse the order of the Zeff values:

O^2- > F^- > Na^+ > Mg^2+ > Al^3+

This means that O^2- is the largest ion in the series, while Al^3+ is the smallest. The size decreases as the Zeff increases, which is consistent with the trends in the periodic table.

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Answer: S orbitals.

Explanation:

Answer:

Pb3O4 + 4H2 → 3Pb + 4H2O

Explanation:

Pb3O4

Tritium - H2

Molar Mass of H2 Bond Polarity H-3 Hydrogen-3 3H T

Products

Lead - Pb

Molar Mass of Pb Plumbum Element 82 Bulk Lead

Water - H2O

Molar Mass of H2O Oxidation Numbers of H2O Dihydrogen Monoxide Dihydridooxygen Hoh Hydrogen Hydroxide Dihydrogen Oxide Oxidane Hydrogen Oxide Pure Water

The reaction performed with the elephant toothpaste demonstration is known as a decomposition reaction.

The process of breaking down a chemical compound into smaller molecules, atoms, or ions is known as a decomposition reaction. It is also known as analysis or disintegration. A reaction in which a single substance is broken down into two or more simpler substances is known as a decomposition reaction. The elephant toothpaste demonstration is a simple chemical reaction in which hydrogen peroxide breaks down into oxygen gas and water in a matter of seconds.

The formula for hydrogen peroxide is H₂O₂. It is a pale blue liquid that contains hydrogen, oxygen, and water. When you add yeast, soap, and food coloring, the reaction is more exciting. The yeast acts as a catalyst, breaking down hydrogen peroxide into water and oxygen gas. The oxygen gas created causes the soap to foam up, creating the "elephant toothpaste" effect. The chemical reaction that takes place during the elephant toothpaste demonstration can be written as follows:

2H₂O₂(liquid) → 2H₂O (liquid) + O₂ (gas)

This reaction is an example of a decomposition reaction.

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The balanced half-reaction for the reduction of gaseous oxygen (O2) to liquid water (H2O) in acidic aqueous solution is as follows:

O2(g) + 4H+(aq) + 4e- → 2H2O(l)

In the reduction half-reaction, gaseous oxygen (O2) is reduced to liquid water (H2O) by gaining electrons (e-) in an acidic aqueous solution. The balanced half-reaction equation can be obtained by considering the number of oxygen and hydrogen atoms on each side of the reaction, as well as the charge balance.

Step 1: Balancing the oxygen atoms:

Since there are two oxygen atoms on the left side (O2) and four oxygen atoms on the right side (2H2O), we need to balance the equation by adding two water molecules (H2O) to the left side:

O2(g) + 4H+(aq) + 4e- → 2H2O(l)

Step 2: Balancing the hydrogen atoms:

On the left side, there are four hydrogen ions (H+). To balance the hydrogen atoms, we need to add four hydrogen ions (H+) to the right side:

O2(g) + 4H+(aq) + 4e- → 2H2O(l)

Step 3: Balancing the charge:

The addition of four electrons (4e-) on the left side ensures the charge balance with the four hydrogen ions (4H+) on the right side:

O2(g) + 4H+(aq) + 4e- → 2H2O(l)

The balanced half-reaction for the reduction of gaseous oxygen (O2) to liquid water (H2O) in acidic aqueous solution is O2(g) + 4H+(aq) + 4e- → 2H2O(l). This equation represents the process of oxygen gaining four electrons and four hydrogen ions to form two water molecules. The balanced half-reaction takes into account the conservation of atoms and charge, ensuring a complete and accurate representation of the reduction process.

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Answer:

The new pressure becomes one third of the initial pressure.

Explanation:

The relation between pressure and volume at constant temperature is given by :

\(P\propto \dfrac{1}{V}\\\\P=\dfrac{1}{V}\)

Let new pressure and volume be P' and V' respectively.

V'=3V (given)

So,

\(P'=\dfrac{1}{V'}\\\\=\dfrac{1}{3V}\\\\=\dfrac{1}{3}\times \dfrac{1}{V}\\\\P'=\dfrac{1}{3}\times P\)

Hence, new pressure becomes one third of the initial pressure.

Answer: B. Hydrogen Bonding

Explanation: I got it right on castle learning lol

There are different kinds of forces. The term that identifies a type of intermolecular force is hydrogen bonding.

The three known to be types of intermolecular interactions. They  are

Hydrogen bonding is known to be an intermolecular force that takes place between two molecules. That molecule is known to have a hydrogen atom be bonded to a nitrogen, oxygen, or fluorine atom.

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Explanation:

Heat, Oxygen and Fuel

hope it helps u

Answer:

a friction helps to cause fire and oxygen helps to increase it

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Formerly employed in thermometers, mercury is a group 12 metal that is now recognized as toxic.

Only +2 ions (M +2 ions) with the configuration (n — 1)d 10 are formed by them. These are not true transition elements since the elements or ions they produce have fully filled (n — 1)d orbitals. They are, nevertheless, grouped with transition metals after forming their own group.

Examples of thermometers without mercury include liquid-in-glass thermometers and electronic digital thermometers. The platinum resistance thermometer is an illustration of an electronic digital thermometer. The thermistor and the thermocouple are more examples.

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Answer:

27.3%

72.7%

Explanation:

Answer:

27.3%

72.7%

Explanation:

on edge

Chymotrypsin has an α-helix that contains 2.5 turns. Approximately 9 amino acids are involved in this helix.

What is chymotrypsin?

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Answer:

propanoic acid

Explanation:

i hope this helps!

The order of activity from most active to least active in the given scenario is: zinc, iron, lead. This is because zinc is the most active element in the group, as it has the least number of valence electrons.

making it more likely to participate in chemical reactions and replace other elements. Iron is the next most active, as it has a higher number of valence electrons than zinc, but still fewer than lead, which is the least active element in the group due to its high number of valence electrons, making it less likely to participate in chemical reactions and replace other elements.A chemical element with the atomic number 30 and the symbol Zn is zinc (Zn). It belongs to the periodic table's group 12 and is a transition metal. A bluish-white, glossy metal with high conductivity for electricity, zinc is a substance. It reacts with oxygen and water to produce zinc oxide (ZnO) and zinc hydroxide (Zn(OH)2) due to its comparatively high reactivity. Brass manufacture, galvanizing (coating steel or iron to prevent corrosion), and alloying other metals all utilize it often.

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The final answer is  1.8 × 102 L of Rn, measured at STP, are produced per day by 1.08 g of Ra.

In order to determine the amount of radon that is produced per day by 1.08 g of Ra, it is essential to calculate the number of Rn atoms that are produced per second.

In the given question, it is known that 1.00 × 1015 atoms of radium produce an average of 1.373 × 104 atoms of Rn per second.

Therefore, we can use this ratio to calculate the number of Rn atoms that are produced per day by 1.08 g of Ra. Once we know the number of Rn atoms produced per day, we can calculate the volume of Rn produced by using the ideal gas law.

The final answer is  1.8 × 102 L of Rn, measured at STP, are produced per day by 1.08 g of Ra.

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Answer:

Hello! This lab is all about heat, which is a measure of energy in a system. In the first part, we'll be examining what happens to a gas when the temperature changes. For this part, you will need a small mouth bottle, a coin, a large container, cold water, and measuring cups. In the second part, we'll be using the idea of energy transfer to move water. For this part, you will need food coloring, water, a large bowl, a small glass, cling film, a small object, and sunny days. Follow the procedures carefully and answer the questions provided to understand the concepts of heat and energy transfer. Don't hesitate to reach out if you have any questions!

C water = 1 cal/g ℃

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question

mass of mineral = 14.7 g

volume = 2.2 cm³

It's density is

\(density = \frac{14.7}{2.2} \\ = 6.681818181...\)

We have the final answer as

Hope this helps you

Answer:

6.68g/cm³

Explanation:

The formula is [ d = m/v ] where m = mass and v = volume.

We are given both "m" and "v" so we can solve using those variables.

d = 14.7/2.2

d ≈ 6.68

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