2. How many grams of copper(II) chloride contain 2.17 grams of Cu²+?

Answer:

Why aren't diamonds found evenly distributed on Earth? Diamonds are only formed under specific conditions that involve geological processes, such as volcanic activities and plate movements. Since these conditions and processes only take place in certain areas, you can only find diamonds in these special places.

Explanation:

The relationship between the vapor pressure of water and acetone is that water will evaporate more slowly than acetone.

As intermolecular forces among debris increases , vapor strain decreases. Hydrogen bonding exist is water at the same time as acetone lacks hydrogen bonding for this reason water has more potent intermolecular forces than acetone. Water will evaporate extra slowly than acetone. The vapor strain of acetone is greater than that of water on the equal temperature. The intermolecular forces assist to preserve the molecules together. The pressure of enchantment among the molecules is referred to as intermolecular forces. This is due to the fact the intermolecular forces among acetone molecules are weaker than the ones among the water molecules.

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2H2 + O2 → 2H2O

First, we will find the moles :

n H2 = m H2 / Mr H2

n H2 = 10 / 2

n H2 = 5 mole

n O2 = m O2 / Mr O2

n O2 = 5 / 16

n O2 = 0.3125 mole

n H2 / coef. H2 > n O2 / coef. O2

So, O2 is the limiting reactant

The mass of water produced :

n H2O = (coef. H2O / coef. O2) • n O2

n H2O = (2/1) • 0.3125

n H2O = 0.625 mole

m H2O = n H2O • Mr H2O

m H2O = 0.625 • 18

m H2O = 11.25 gr

Excesses reactant :

n H2 = 5 - 0.625 = 4.375 mole

m H2 = n H2 • Mr H2

m H2 = 4.375 • 2

m H2 = 8.75 gr

Based on the equation of the reaction and the mass of reactants:

The equation of the synthesis of water is given below:

From the equation of the reaction, 2 moles of hydrogen combines with 1 mole of oxygen to give two moles of water.

Moles of reactants:

Moles = mass/molar mass

molar mass of hydrogen gas = 2.0 g

molar mass of oxygen gas = 32.0 g

molar mass of water = 18.0 g

moles of H₂ = 10/2 = 5 moles

moles of O₂ = 5/32 = 0.15625 moles

The mass of water produced :

mole ratio of oxygen to water = 1 : 2

moles of water produced = 0.15625 moles × 2

moles of water = 0.3125 moles

mass of water produced = 0.3125 moles × 18 g/mol

Based on the mole ratio, the excess reactant is hydrogen.

Mass of hydrogen left = moles of hydrogen left × molar mass

moles of hydrogen left = 5 - 0.3125 = 4.6785 moles

mass of hydrogen left = 4.6785 × 2

mass of hydrogen left  = 9.375 g

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Answer:

H2O is the formula of water

Answer:

H²O is formula of water

Explanation:

2 molecule of hydrogen and 1 molecule of oxygen

The percent by mass of sulfur is  20.1%.

Here, we need to find the percent by mass of the sulfur atom and we have to do that by first obtaining the molar mass of the compound as we can see it from the question.

Hence;

Molar mass of the compound = 63.55 + 32.07 + 4( 16.00 )

=  63.55 + 32.07 + 64

= 159.62

We now have to find the percent by mas of sulfur;

32.07/159.62  * 100

= 20.1%

The compound contains 20.1% of sulfur by mass of the compound as shown in the calculation.

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Answer:

The traditional vision of the role science should play in policy making is of a two stage process of scientists first finding out the facts, and then policy makers making a decision about what to do about them.

Explanation:

Balanced chemical reaction given by

\(\\ \rm\rightarrowtail 2C_2H_2+5O_2\longrightarrow 4CO_2+2H_2O\)

moles of O_2.

Now

1.5mol produces:-

Volume of cO_2

Answer:

52

I personally don't know how to do this but this is what I was told the answer is

There are 22 atoms in calcium phosphate with chemical formula  4 Ca₃(PO₄)₂ .

To determine the number of atoms in a chemical formula, one need to multiply the number of atoms for each element by the corresponding subscript and then sum them up.

In the given chemical formula, 4 Ca₃(PO₄)₂, :

- 4 is the coefficient in front, indicating that the entire compound is multiplied by 4.

- Ca represents calcium, and the subscript 3 indicates there are 3 calcium atoms.

- (PO₄)₂ represents a group called a phosphate group. Within the phosphate group, we have 1 phosphorus atom (P) and 4 oxygen atoms (O). The subscript 2 outside the parentheses indicates that the entire phosphate group is multiplied by 2.

To calculate the total number of atoms, we multiply the coefficients by the subscripts and sum them up:for calcium (Ca):

3 calcium atoms × 4  = 12 calcium atoms

For phosphate:

1 phosphorus atom ×2  = 2 phosphorus atoms

4 oxygen atoms ×2 = 8 oxygen atoms

Adding up the totals:

12 calcium atoms + 2 phosphorus atoms + 8 oxygen atoms = 22 atoms

Therefore, there are 22 atoms in 4 Ca₃(PO₄)₂.

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To convert this number to scientific notation, count the number of zeros to the left of the significant figures. There are 4 of them.

Rewrite the significant figures in a way in which there is 1 digit in the whole part and 2 in the decimal part, the exponent of 10 will be the negative of the number of zeros:

A beer that is 2.50% (vlv) alcohol has 6.25 mL of ethanol per glass (250.0 mL) of beer.

"Percent volume to volume" (vlv) is a way to express the concentration of a solution. It is defined as the volume of solute divided by the volume of the entire solution, multiplied by 100%.

In this case, we are given that a beer is 2.50% (vlv) alcohol. This means that the volume of ethanol in the beer is 2.50% of the total volume of the beer.

To calculate the amount of ethanol in a 250.0 mL glass of beer, we can use the following formula:

Volume of ethanol in mL = Percent vlv x Volume of solution in mL / 100

Plugging in the given values, we get:

Volume of ethanol in mL = 2.50 x 250.0 / 100 = 6.25 mL

Therefore, a beer that is 2.50% (vlv) alcohol has 6.25 mL of ethanol per glass (250.0 mL) of beer.

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Answer:

\(16\ \text{ppm}\)

Explanation:

Mass of one tablet = 20 mg

Mass of two tablets = \(2\times 20=40\ \text{mg}\)

Percent that is soluble in water = 40%

Mass of tablet that is soluble in water = \(0.4\times 40=16\ \text{mg}\)

So, mass of solute is \(16\ \text{mg}\)

Density of water = 1 kg/L

Volume of water = 1 L

So, mass of 1 L of water is \(1\times 1=1\ \text{kg}=1000\ \text{g}\)

PPM is given by

\(\dfrac{\text{Mass of solute}}{\text{Mass of solvent}}\times 10^6=\dfrac{16\times 10^{-3}}{1000}\times 10^6\\ =16\ \text{ppm}\)

Hence, the concentration of iodine in the treated water \(16\ \text{ppm}\).

Answer:

25.82°C

Explanation:

Based on the reaction, 1 mole of HCl and 1 mole of NaOH reacts, that means the reaction is 1:1. The moles of each compound are:

Moles HCl:

0.025L * (0.144mol/L) = 0.0036 moles HCl

Moles NaOH:

0.020L * (0.132mol/L) = 0.00264 moles NaOH

Thus, moles of reaction are 0.00264 moles

The heat released in a calorimeter is obtained using the equation:

Q = m*c*ΔT

Where Q is heat released in the reaction:

0.00264 moles * (-57.62kJ/mol) = 0.1521kJ = 152.1J of reaction

m is mass of the solution:

25.0mL + 20.0mL = 45mL * (1.04g/mL) = 46.8g

c is specific heat of the solution:

3.93J/gºC

And ΔT is change in temperature.

Solving for ΔT:

Q /mc = ΔT

151.2J / 46.8g*3.93J°C = 0.82°C = ΔT = Final temperature - Initial temperature.

Final temperature = 0.82°C + 25°C =

Answer:

The last one.

Explanation:

The other ones add more force or give the same but the last one reduces it.

a. We need approximately 94.4 grams of sodium chloride to completely react with 75.0 L of fluorine gas.

b. 75.0 grams of sodium chloride will produce approximately 107 grams of sodium fluoride.

c. The volume of chlorine gas produced is 17.96L.

a. To calculate the mass of sodium chloride needed to completely react 75.0 L of fluorine gas, we first need to use the ideal gas law to convert the volume of fluorine gas to moles:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. Assuming standard temperature and pressure (STP), which is 0°C and 1 atm, we have:

n = PV/RT = (1 atm) (75.0 L) / (0.0821 L·atm/mol·K)(273 K) ≈ 3.23 mol F2

From the balanced chemical equation, we know that 2 moles of NaCl react with 1 mole of F2 to produce 2 moles of NaF and 1 mole of Cl2. Therefore, we need half as many moles of NaCl as F2:

n(NaCl) = 0.5n(F2) = 0.5(3.23 mol) = 1.615 mol NaCl

Finally, we can convert the moles of NaCl to mass using its molar mass:

m(NaCl) = n(NaCl) × M(NaCl) = 1.615 mol × 58.44 g/mol ≈ 94.4 g NaCl

Therefore, we need approximately 94.4 grams of sodium chloride to completely react with 75.0 L of fluorine gas.

b. To calculate the mass of sodium fluoride produced from 75.0 grams of sodium chloride, we first need to convert the mass of NaCl to moles:

n(NaCl) = m(NaCl) / M(NaCl) = 75.0 g / 58.44 g/mol ≈ 1.28 mol NaCl

From the balanced chemical equation, we know that 2 moles of NaCl react with 2 moles of NaF. Therefore, we can calculate the moles of NaF produced:

n(NaF) = 2 × n(NaCl) = 2.56 mol

Finally, we can convert the moles of NaF to mass using its molar mass:

m(NaF) = n(NaF) × M(NaF) = 2.56 mol × 41.99 g/mol ≈ 107 g NaF

Therefore, 75.0 grams of sodium chloride will produce approximately 107 grams of sodium fluoride.

c. To solve this problem, we need to use stoichiometry and the ideal gas law.

First, let's balance the chemical equation:

2NaCl(s) + F2(g) → 2NaF(s) + Cl2(g)

Molar mass of NaF = 22.99 + 18.99 = 41.98 g/mol

Number of moles of NaF produced = 66.60 g / 41.98 g/mol = 1.585 mol

Since 2 moles of NaF are produced for every 1 mole of Cl2, we can calculate the number of moles of Cl2 produced as follows:

Number of moles of Cl2 produced = 1.585 mol / 2 = 0.7925 mol

Applying the ideal gas law

PV = nRT

Assuming standard temperature and pressure (STP) conditions (0°C or 273 K and 1 atm), we can simplify the equation as follows:

V = nRT/P = (0.7925 mol) (0.0821 L·atm/mol·K) (273 K) / 1 atm = 17.96 L

Therefore, the volume of chlorine gas produced is 17.96 L.

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Answer: An electron con only exist in a limited number of quantized energy levels.

Explanation:

Answer:

see in explanation

Explanation:

Use mass of solute/mass of solution x 100

-48.2 gC12H22O11 / (528 gH2O + 48.2 gC12H22O11) x 100 = (48.2/ 576.2) x 100 = 8.37%

One liquid substance that could be used in the laboratory for dissolving dry mortar on floor tiles is hydrochloric acid (HCl). Hydrochloric acid is a strong acid commonly used in laboratories for various purposes, including cleaning and dissolving mineral deposits.

When dry mortar, which is primarily composed of cement, hardens on floor tiles, it can be challenging to remove using traditional cleaning methods. However, hydrochloric acid can effectively dissolve and break down the cementitious components of the mortar.

It is important to note that when using hydrochloric acid, proper safety precautions should be followed, such as wearing protective gloves, goggles, and working in a well-ventilated area.

Additionally, it is crucial to dilute the hydrochloric acid to an appropriate concentration for the specific task, as using it undiluted can cause damage to the tiles or other surfaces.

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Answer:

It is 6.52 * 10^14 Hz

Explanation:

Did it on A pex

Go to the Data tab > Sort & Filter group, and click Clear.

Go to the Home tab > Editing group, and click Sort & Filter > Clear.

Note that the above prompt on Ecology draws it's analysis form a well known story which have been told visually called "The Lion King".

The answers are:

1) Biotic Factors, simply put are living things

2 examples of things from Lion King Introduction are:

3) Abiotic factors are Non -living things.

4) Examples from the introduction are:

5) the symbiotic relationship is called: commensalism.

Long-term biological interactions known as commensalism occur when individuals of one species benefit while those of the other species suffer neither advantages nor harm.

Ecology which is the study of the environment, allows  a person  to comprehend how different types of creatures coexist in various kinds of physical settings.

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Full Question:

Although part of your question is missing, you might be referring to this full question:

1) What is Biotic Factors

2) List three biotic factors from the Lion King introduction

3) What is Abiotic factors?

4) List three Abiotic factors from the Lion King introduction

5) The bird riding on the tusks of the elephant feed on insects the elephant stirs up. What kind of symbiotic relationship exists between the two?

Answer:

ed

Explanation:

ed

Answer:

Once a density has been calculated the tool will also display two conversion scales for a range of mass and volume values

Explanation:

The density of this particular liquid is \(5833 kg/ m^3\).

Density is defined as mass per unit volume. It is a standard mechanical quantity. The most frequently used symbol for density is ρ (rho), D can also be used which is a Latin letter.

It can be expressed as

\(\rho ={\frac {m}{V}}\\\\\rho = density \\m = mass\\V = volume\)

Density is expressed in \(kg/m^3\) , mass in kg and volume in \(m^3\)

For above given information,

Mass= 350 g= 0.350kg

Volume= 60ml = 0.00006 \(m^3\) (\(1ml= 1/10^6 m^3\))

So, Density= 0.350/0.00006 = \(5833 kg/m^3\)

Thus, the density of this particular liquid is \(5833 kg/ m^3\).

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Answer:

0.5mol

Explanation

Please mark answer as brainliest

TT with Tt

or TT with TT

would give a tall plant

Answer:

B) water and salt is the result of neutralization reaction

Water and salts are the product of a neutralization reaction.

NEUTRALIZATION REACTION:

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Answer:

=> 0.12428 M

Explanation:

To begin, write down a balanced equation;

Ca(HCO3)2 + 2HNO3 => Ca(NO3)2 + 2H2O + 2CO2

Then calculate the number of moles contained in 9.56 mL of 1.30M HNO3

We know that molarity is contained in 1000mL

1000 mL = 1.30 moles

9.56 mL = ?

= (9.56 × 1.30)/1000

= 0.012428 moles

Mole ratio

Ca(HCO3)2 : HNO3

1 : 2

But, xmoles : 0.012428 moles

x = 1/2 × 0.012428

= 0.006214 moles

This moles is contained in 50 mL solution.

50 mL = 0.006214 moles

1000 mL = ?

= (1000 × 0.006214)/50

= 0.12428M

The maximum distance between the two white balls is 2R, and the maximum angle between them is 180 degrees (or π radians).

Maximum distance between the balls:

The maximum distance between the two white balls will be achieved when they are placed at opposite ends of a diameter of the circular region.

In this case, the distance between them will be equal to the diameter of the circle, which is 2R.

Maximum angle between the balls:

To find the maximum angle between the two balls, imagine the center of the circle as the vertex of the angle, and the positions of the two balls as the endpoints of the angle's two sides.

Since the balls are located at opposite ends of a diameter, the angle formed will be a straight angle, which is 180 degrees (or π radians).

So, the maximum distance between the two white balls is 2R, and the maximum angle between them is 180 degrees (or π radians).

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Two white balls, A and B, are placed on a flat surface inside a circular region of radius R. What is the maximum distance and maximum angle between the balls that can be achieved

In physics and mathematics, amplitude refers to the maximum displacement or distance that an oscillating or vibrating object or wave reaches from its equilibrium position.

For example, in the case of a simple harmonic motion (like a mass attached to a spring), the amplitude is the maximum displacement from the equilibrium position (i.e., the position where the spring is neither compressed nor stretched).

In the case of a wave, such as a sound wave or a light wave, the amplitude is the maximum distance that any part of the wave travels from its resting position (i.e., the position where there is no wave).

The amplitude is usually measured in units of distance, such as meters or feet, or in units of some other physical quantity that is related to distance, such as pressure or electric field strength.

The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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Answer:C

Explanation:

C. Boiling point

Stacy is most likely testing the boiling point of the liquid in each vial. By heating the vials on the hot plate, he is increasing the temperature of the liquid and observing when it begins to boil. Boiling point is a physical property of a substance that is affected by factors such as pressure and temperature. It is the temperature at which the vapor pressure of the liquid is equal to the pressure exerted on the liquid by its surroundings. Therefore, by testing the boiling point of the liquid, Stacy can determine its identity or purity.