Name the phase change in each of these events: (c) Molten iron from a blast furnace is cast into ingots (""pigs"").

The Hamlet saying is To be or Not to be means to be live or not to be live.

The hamlet says that to be or not to be because he is questioning the value of the life. he is question to himself that whether it is worthwhile hanging there. hamlet is in extreme depression.  hamlet is fed up with everything around him in the world. hamlet is in confusion whether it is worth to exist. hamlet is dilemma whether to live or die.

Thus, the hamlet says , To be or not to be because he is questioning about value of life whether to live or to die.

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Answer:

387 g/mol

Explanation:

The molar mass is a ratio comparing a substance's mass and molar value. The specific ratio looks like this:

Molar Mass (g/mol) = mass (g) / moles

You can plug the given values into the ratio to find the molar mass.

Molar Mass = mass / moles

Molar Mass = 0.406 g / 0.00105 mol

Molar Mass = 387 g/mol

Explanation:

Hydrolysis of salt is a reaction in which one of the ions from a salt reacts with water,forming either an acid or basic.

Answer:

force exerted on the ball

Explanation:

Answer:

phosphorus

Explanation:

Answer:

n = 0.223 mol.

Explanation:

Hello there!

In this case, according to the given information, it is possible for us to approach this problem via the ideal gas law, which involves the pressure, moles, temperature and volume of the gas:

\(PV=nRT\\\\\)

Thus, by solving for moles we obtain:

\(n=\frac{PV}{RT}\)

Therefore, we plug in the given volume, temperature (in Kelvins) and pressure to obtain:

\(n=\frac{0.9atm*8L}{0.08206\frac{atm*L}{mol*K}*(120+273)K} \\\\n=0.223mol\)

Best regards!

To multiply the numbers and round the answer to the correct number of significant figures, follow these steps: Multiply the numbers, and Determine the number of significant figures in the original numbers.       3.293 X 0.82 = 2.7 (rounded to 2 significant figures).

To multiply the numbers and round the answer to the correct number of significant figures, follow these steps:

Step 1: Multiply the numbers: 3.293 x 0.82 = 2.69726.

Step 2: Determine the number of significant figures in the original numbers. In this case, 3.293 has 4 significant figures, and 0.82 has 2 significant figures.

Step 3: Round the result to the least number of significant figures among the original numbers, which is 2 significant figures in this case.

Step 4: Round the result to 2 significant figures: 2.7.

Therefore, \(3.293 X 0.82 = 2.7\)  (rounded to 2 significant figures).

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Answer:

1 mol Ca(OH)2 produces 2 mol NH3

4 mol Ca(OH)2 will produce 8 mol NH3

1 mol NH3 contains 6.022*10^23 molecules NH3

8 mol NH3 contain 8*6.022*10^23 = 4.8*10^24 molecules NH3

Explanation:

The voltage across the 200 ohm circuit element, that draws a current of 4 A, is equal to 800 volts.

To find the voltage across a circuit element, take Ohm's Law, according to which the resistance (R) of a resistor is equal to the product of the current (I) that flows through it and the voltage (V) across it.

Use the values:

Current (I) = 4 A

Resistance (R) = 200 Ω

Using the formula of Ohm's Law:

V = I × R

V = 4 A × 200 Ω

V = 800 V

Voltage is  800 V.

Thus, the voltage across the 200 ohm circuit element, that draws a current of 4 A, is 800 volts.

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There are four possible types of orbital interactions when two atomic orbitals approach each other along a particular axis: bonding, antibonding, nonbonding, and destructive. These interactions are determined by the relative orientation and symmetry of the orbitals, as well as the energy difference between them.

1. Bonding: When two atomic orbitals approach each other along the same axis and have the same symmetry, they will form a bonding orbital. This orbital will have a lower energy than the individual orbitals, and will be more stable.
2. Antibonding: When two atomic orbitals approach each other along the same axis but have opposite symmetry, they will form an antibonding orbital. This orbital will have a higher energy than the individual orbitals, and will be less stable.
3. Nonbonding: When two atomic orbitals approach each other along a perpendicular axis, they will not interact and will remain as nonbonding orbitals. These orbitals will have the same energy as the individual orbitals.
4. Destructive: When two atomic orbitals approach each other along a perpendicular axis but have opposite symmetry, they will interact destructively and cancel each other out. This will result in no orbital being formed.

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Answer:

Chemists can determine the number of atoms in an amount of matter using a variety of techniques, such as mass spectrometry, X-ray diffraction, and atomic absorption spectroscopy. These techniques allow chemists to measure the mass and volume of a sample of matter and to analyze its chemical composition.

To determine the number of paper clips in a beaker without counting them by hand, you could use a balance to measure the mass of the beaker and the paper clips. You could then use the mass of a single paper clip to calculate the total number of paper clips in the beaker. Alternatively, you could measure the volume of the beaker and the paper clips and use the density of paper to calculate the total number of paper clips in the beaker.

Explanation:

Answer:

The concentration contained in 14.5 grams of ammonium nitrate that is dissolved creating 250 milliliters is 0.72M.

The molarity or concentration of a substance refers to the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

Molarity can be calculated by dividing the number of moles in a substance by its volume as follows:

Concentration = no of moles ÷ volume

14.5 grams of ammonium nitrate with a molar mass of 80.043g/mol can be converted to moles to be 0.18 moles.

molarity = 0.18 mol ÷ 0.250L = 0.72M

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The total heat required to change 32.5 grams of liquid water into steam, from room temperature is  116,308.38 J

The amount of heat required depends on the specific heat and heat of vaporization of water, as well as the mass and temperature change of the water and steam. To calculate the heat required to change 32.5 grams of liquid water into steam from room temperature (25°C) to 115°C, we need to consider the following steps:

Heat required to increase the temperature of 32.5 grams of liquid water from 25°C to 100°C:

Q1 = mcΔT = 32.5g x 4.18 J/g·°C x (100°C - 25°C) = 43262.5 J

Heat required to vaporize 32.5 grams of liquid water at 100°C:

Q2 = mΔH vaporization = 32.5g x 2259 J/g = 73237.5 J

Heat required to increase the temperature of 32.5 grams of steam from 100°C to 115°C:

Q3 = mcΔT = 32.5g x 1.99 J/g·°C x (115°C - 100°C) = 808.38 J

Qtotal = Q1 + Q2 + Q3 = 116,308.38 J

The total heat required to convert 32.5 grams of liquid water into steam from 25°C to 115°C is 116,308.38 J.

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Answer:

10.28 mol

Explanation:

S + 2O = SO2

(atm x L) ÷ (0.0821 x K)

(3.45 x 45.6) ÷ (0.0821 x 373)

=5.13726

Then round it to significant figures

=5.14

5.14 mol SO2 x (2 mol O ÷ 1 mol SO2)

=10.28 mol O

The number of moles of oxygen atoms in 5.14 moles of SO₂ gas is equal to 10.28 mol.

The ideal gas law is used to describe an equation of the state of an ideal gas. The ideal gas equation can be defined as the product of the volume (V) and the pressure (P) of 1-mole ideal gas is equal to the product of the universal gas constant (R) and absolute temperature.

The ideal gas equation can be expressed in the mathematical form as follows:

PV = nRT

Where n is the moles of a gas, P is the pressure,  V is the volume of the gas,  and R is the universal gas constant.

Given, the volume of sulfur dioxide, V = 45.6 L

The temperature of SO₂ gas, T = 373 K

The universal gas constant, R =0.082 atmL /K mol

The pressure of the SO₂ gas, P = 3.45 atm

Substituting the values R, V, P, and T in the gas law equation, we get:

The number of moles of sulphur dioxide, n = PV/RT

n = 3.45 ×45.6/(0.082 × 373)

n = 5.14 mol

The number of moles SO₂ gas = 5.14

Moles of oxygen atoms in 5.14 moles of SO₂ = 2 × 5.14 = 10.28 mol

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Answer:

Triangular

hope it helped.

Answer:

Prisms can be both triangle and rectangle. if you can't circle or choose 2 answers then you should've been given a picture. hope it helps

The number of carbon atoms at STP is  1.47 x 10²³ atoms

STP stands for standard temperature and pressure. STP refers to a specific pressure and temperature used to report on the properties of matter.

According to IUPAC( International Union of Pure and Applied Chemistry), it is defined as -

It is generally needed to test and compare physical and chemical processes where temperature and pressure plays an important role as they keep on varying from one place to another.

One mole of a gas under STP conditions occupies a volume of 22.4L.

Given,

Volume of CO₂ = 5.50 L

number of moles of CO₂ = 5.5 ÷ 22.4

                                        = 0.245 moles

We know that,

                     1 mole = 6.023 x 10²³ atoms

So, 0.245 moles will have 6.023 x 10²³ × 0.245 atoms

                            =  1.47 x 10²³ atoms

Therefore, the number of carbon atoms at STP is  1.47 x 10²³ atoms

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Answer:

1.8 *10^13 g of NO2

Explanation:

if 1 short ton  of NO2 = 2000Ib OF NO2

20 million short tons of NO2 = 20 * 10^ 6 * 2 * 10^3/1

= 40 * 10^9 Ib

If 1 pound (lb) =  453.59237 grams (g).

40 * 10^9 Ib =40 * 10^9  * 453.59237/1

= 1.8 *10^13 g of NO2

Assuming the container initially contains an ideal gas at 518.0 kpa at 298.15 k, the aluminium aerosol can will rupture when the internal pressure reaches 210.0 psi, whereas it will burst at 822.50 K.

Pressure is the force applied per unit area over the force perpendicular to an object's surface (symbol: p or P). The pressure as it relates to the air pressure around it is referred to as the gauge pressure. There are several different units used to express pressure. The behaviour of multiple  ideal gas under varied conditions is accurately approximated by the ideal gas law in thermodynamics. The Charle's Law, Boyle's Law, and T2 = (298.15*14.29)/5.18sT2 = 822.50K empirical laws are all combined in the Ideal Gas Equation.

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Yes i think that a glass of water contains carbon because , carbon dioxide diffuses into water . The amount of carbon dioxide in the glass of water and the amount of carbon dioxide in the atmosphere are precisely proportional  .

The carbon dioxide that almost all natural waters contain is obtained in a variety of ways . Some of this gas is absorbed by rain as it falls through the air. Rainwater that has been somewhat acidic on its journey to the earth will brings  more carbon dioxide if it passes through decomposing plants .  Although in considerably lesser amounts than in carbonated beverages , carbon dioxide gas can also be found in a glass of water .

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For this problem, we could use the ideal gas equation:

Where P is the pressure, V is the volume, R is a constant and T is the temperature.

Before we start solving, we should remember the units:

P [atm]

V [L]

The given reaction is the calcium carbide reaction of calcium hydroxide with water to produce acetylene.

The balanced equation is CaC2+2H2OCa(OH)2+C2H2.

Molar mass of acetylene, C2H2 = 2x12+2x1 = 26 g/mol

we get 64 g of CaC2 becomes 26 g of C2H2. 5.0g CaC2..

Molecular weight of Ca(OH)2=1(atomic weight of Ca)+2(atomic weight of O)+2(atomic weight of H)=40+2(16)+2(1)=40+32+2=74.

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The pseudoformula of ascorbic acid is C₆H₈O₆.

Pseudoformula is defined as an empirical formula which is twice or thrice the actual molecular formula of a compound. In this case, ascorbic acid contains 3. 407 mol of carbon, 4. 53 mol of hydrogen, and 3. 406 mol of oxygen.So, the simplest way to get the empirical formula of ascorbic acid is by using the formula weight, which is the sum of the atomic weights of the atoms present in the compound.

The atomic weights of carbon, hydrogen, and oxygen are 12.01, 1.01, and 16.00, respectively.

Calculate the formula weight of ascorbic acid:

(3.407 mol of C × 12.01 g/mol) + (4.53 mol of H × 1.01 g/mol) + (3.406 mol of O × 16.00 g/mol)

= 176.12 g/mol

The empirical formula for ascorbic acid is found by dividing each molar amount by the smallest molar amount, which is 3.406. Doing this will give you a ratio of the elements in the compound, which will be used to construct the empirical formula.

Carbon: 3.407 mol ÷ 3.406 mol = 1.000

Hydrogen: 4.53 mol ÷ 3.406 mol = 1.332

Oxygen: 3.406 mol ÷ 3.406 mol = 1.000

The empirical formula of ascorbic acid is CH1.0000O1.0000, which is not a valid formula. The formula must have whole number subscripts. By multiplying each subscript by the same number to obtain a whole number ratio, the empirical formula of ascorbic acid can be determined.

Multiply the subscripts by 6 to obtain a whole number ratio: C₆H₆O₆

Divide the subscripts by 6 to obtain the simplest whole number ratio: C₁H₁O₁

The simplest whole number ratio is equal to the molecular formula of ascorbic acid: C₆H₈O₆.

The pseudoformula of ascorbic acid is C₆H₈O₆.

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The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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Answer:

B. evaporation of the liquid

The above assertion claims that the emperical formula for enargite is Cu3AsS4.

The simple whole number proportion of atoms in a compound is the empirical formulae of a chemical in chemistry. No information on the arrangement or quantity of atoms is provided in an empirical formula.

If we use 100 grams of enargite:

n(Cu) = 48,41 g ÷ 63.55 g/mol.

n(Cu) = 0.761 mol.

n(As) = 19.02 g ÷ 74.92 g/mol.

n(As) = 0.254 mol.

n(S) = 32.57 g ÷ 32.065 g/mol.

n(S) = 1.016 mol.

n(Cu) : n(As) : n(S) = 0.761 mol : 0.254 mol : 1.016 mol / 0.254.

n(Cu) : n(As) : n(S) = 3 mol : 1 mol : 4 mol.

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Answer:

The boiling point of iodine is 363.7°F / 184.3°C