How many atoms are there in 3.3 moles of strontium?

Answer:

creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes.

Explanation:

Nuclear energy produces radioactive waste

A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years.

Answer:

6,570,000

Rounded to 3 significant figures. The figures therefore are 6, 5, 7

Answer:

Freezing T° of solution is -142.4°C

Explanation:

This excersise is about colligative properties, in this case freezing point depression,

ΔT = Kf . m . i

Where ΔT = Freezing T° of solvent - Freezing T° of solution

Kf = Cryoscopic constant

m = mol/kg (molality)

i = Number of ions dissolved.

Water is not ionic, so i = 1

Let's find out m.

We determine mass of water, by density

498ml . 1 g/mL = 498 g

We convert the mass of water to moles → 498 g . 1mol/18g = 27.6 moles

We determine mass of solvent by density

2500 mL . 0.789 g/mL = 1972.5 g

Notice, we had to convert L to mL to cancel units.

1 cm³ = 1 mL

We convert the mass from g to kg → 1972.5 g . 1kg /1000g = 1.97kg

We determine m = mol/kg → 27.6mol / 1.97kg = 13.9 m

Kf for ethanol is: 1.99 °C/m

Freezing T° for ethanol is: -114.6°C

We replace at formula: - 114.6°C - Freezing T° solution = 1.99 °C/m . 13.9 m . 1

- 114.6°C - Freezing T° solution = 27.8 °C

- Freezing T° solution  = 27.8°C + 114.6°C

Freezing T° Solution = - 142.4 °C

Answer:

Explanation:

The image of (-2,-2) after a dilation by a scale factor of 2 centered at the origin is -10,-10.

Dilation is defined as a method of altering an object's or shape's size by reducing or expanding its dimensions by certain scaling parameters.

It can also be defined as the state of being stretched or swollen beyond what is usual, especially as a result of illness, overwork, or abnormal relaxation, which can cause dilatation of the heart or dilatation of the stomach.

Simply multiply by 5 because the point is at the origin.

So, -2 x 5 = -10

and -2 x 5 = -10

Thus, the image of (-2,-2) after a dilation by a scale factor of 2 centered at the origin is -10,-10.

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Answer:

c

Explanation:

when measuring liquids you use liters

The acceptable method to directly measure volume using the metric system using a graduated cylinder to measure gallons. Thus, option C is correct.

The angles and relative measurements of a polished gem and the relationships between them are called proportion. Proportion is defined as equation in which two ratios are set equal to each other.

The relationship among the different things or parts with respect to comparative size, degree and number. There are several types of proportion and these are direct proportion, compound proportion, continued proportion, and inverse proportion.

Gravitational force is a force which act on objects which have a matter i.e a object which contains mass. Gravitational force is force which act between two objects which have a mass and both object are try to attract each other.

Therefore, The acceptable method to directly measure volume using the metric system using a graduated cylinder to measure gallons. Thus, option C is correct.

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The total number of constitutional and stereoisomers generated by free-radical bromination of an unknown chemical using N-bromosuccinimide (NBS) is determined by the unique structure of the product and the reaction conditions. So, the correct option is E.

While stereoisomers have the same connectivity, constitutional isomers differ with respect to how their atoms are arranged in space. In free-radical bromination, the hydrogen atoms of the compound may be replaced by different bromine atoms to produce constitutional isomers. Additionally, stereoisomers can develop due to different substituent orientations or geometric isomerism if the chemical has chiral centers or double bonds.

Therefore, the correct option is E as total constitutional and stereoisomers can be 2-5.

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Your question is incomplete, most probably the complete question is:

How many total constitutional and stereoisomers are produced by the free-radical bromination of an unknown compound using N-bromosuccinimide (NBS)?

A) 2

B) 3

C) 4

D) 5

E. all of the above

Determine the number of constitutional and stereoisomers produced by the free-radical bromination of the unknown compound using N-bromosuccinimide (NBS). Consider the possible substitution patterns and stereochemistry changes. Choose the correct answer from the given options.

Answer:

Discharge

Explanation:

this is the answer

A)1.75×3 moles of carbon monoxide

B)2:3

A)each mole of ferric oxide requires 3 moles of carbon monoxide. Therefore 1.75 moles requires 1.75 ×3 moles of carbon monoxide

The compound that is not an intermediate in the conversion of alanine's carbon skeleton into that of aspartate is pyruvate.

Pyruvate is produced from the breakdown of glucose during glycolysis and can be used in various metabolic pathways, but it is not involved in the conversion of alanine to aspartate. The conversion of alanine to aspartate requires a series of enzymatic reactions involving several intermediates such as oxaloacetate, fumarate, and malate. These intermediates are part of the citric acid cycle, also known as the Krebs cycle, which plays a central role in cellular metabolism. The conversion of alanine to aspartate involves transamination reactions, where the amino group from alanine is transferred to α-ketoglutarate to form glutamate, which is then converted to aspartate through a series of steps. Overall, the conversion of alanine to aspartate is an important process for maintaining amino acid homeostasis and regulating various metabolic pathways in the body.

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To find the number of moles of H₂O required, we need to determine the molar ratio between H3PO3 and H₂O in the balanced equation.

From the balanced equation:

P2O3 + 3H₂O → 2H3PO3

We can see that 2 moles of H3PO3 are produced from 3 moles of H₂O.

To calculate the number of moles of H₂O, we can set up a proportion using the molar ratios:

2 moles H3PO3 / 3 moles H₂O = 164 g H3PO3 / x moles H₂O

Cross-multiplying the proportion, we have:

2 moles H3PO3 * x moles H₂O = 3 moles H₂O * 164 g H3PO3

2x = 3 * 164

Simplifying:

2x = 492

x = 492 / 2

x = 246

Therefore, 246 moles of H₂O are required.

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Answer:

3

Explanation:

Answer:

2.50 litres of a 10.0 M solution require the preparation of 25.0 moles of ethylene glycol.

Excellent antifreeze, anti-boil, and anti-corrosive qualities are produced when antifreeze and water are mixed in a 50/50 ratio. The proportion of conventional ethylene glycol to water in severely cold conditions can reach 70% antifreeze, 30% water. The maximum antifreeze to water ratio when using DEX-COOL® is 60/40.

moles = concentration (M) x volume (L)

Given that the desired concentration is 10.0 M and the volume needed is 2.50 L, the setup for calculating the total number of moles of ethylene glycol can be written as:

moles = 10.0 M x 2.50 L

moles = 25.0 mol

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Answer:

kinetic energy

Explanation:

Answer:

kinetic energy

Explanation:

In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

The ratio of HH, HT, and TH outcomes when you make 5 coin tosses is : 1. HH: 1/4 or 0.252. HT: 1/4 or 0.253.

When we flip a coin, we have two possible outcomes: heads (H) or tails (T).In a sequence of coin tosses, three distinct outcomes are possible: head-head (HH), head-tail (HT), and tail-head (TH). We can find the probability of each outcome and then express it as a ratio. Let's take a look at each outcome:Head-Head (HH)If we flip a coin twice, the probability of getting two heads (HH) is: 1/2 * 1/2 = 1/4 or 0.25. This means that out of all possible outcomes, 25% will be HH.Head-Tail (HT)If we flip a coin twice, the probability of getting a head-tail (HT) combination is: 1/2 * 1/2 = 1/4 or 0.25. This means that out of all possible outcomes, 25% will be HT.Tail-Head (TH)

If we flip a coin twice, the probability of getting a tail-head (TH) combination is: 1/2 * 1/2 = 1/4 or 0.25. This means that out of all possible outcomes, 25% will be TH.TH: 1/4 or 0.25.This means that out of all possible outcomes, each combination has a 25% chance of occurring.

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Thermal energy is a type of energy that is associated with the movement of atoms and molecules in a substance. It is also known as heat energy.

All matter is made up of atoms and molecules, and these atoms and molecules are always in motion. This motion is what gives a substance thermal energy. The faster the atoms and molecules move, the more thermal energy a substance has.

Temperature is a measure of how hot or cold a substance is, and it is directly related to the thermal energy in a substance. For example, a substance with a high temperature will have a greater amount of thermal energy than a substance with a low temperature.

Heat is the transfer of thermal energy from one substance to another. When two substances are in contact with each other, heat will flow from the substance with the higher temperature to the substance with the lower temperature, until the two substances reach the same temperature. This process is known as thermal equilibrium.

Thermal energy can be converted into other forms of energy and vice versa. For example, burning fossil fuels like coal and oil converts the stored chemical energy in the fuel into thermal energy which is then used to generate electricity.

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Answer:

Fluorine:non-metal

Bromine:non-metal

Hydrogen:non-metal

Beryllium:metal

Nitrogen:non-metal

The answer is A) Electrons are exchanged.

All reactions that involve molecular oxygen, such as combustion and corrosion, are electron transfer reactions. This includes the rusting of iron.

Answer:

7. Chemical

8. Chemical

9. Physical

10. Physical

11. Physical

12. Physical

Explanation:

The concentration of bicarbonate ions decreases during metabolic acidosis due to the build-up of fixed acids.

Metabolic acidosis occurs when there is an imbalance between the production and excretion of fixed acids. This leads to an excess of fixed acids in the body, such as lactic acid and ketoacids. The excess fixed acids react with bicarbonate ions (\(HCO_{3}^{-}\)) to form carbonic acid (\(H_{2}CO_{3}\)). Carbonic acid then dissociates into water (\(H_{2}O\)) and carbon dioxide (\(CO_{2}\)), which is exhaled. As bicarbonate ions are used up in this process, their concentration decreases in the body.

Thus, bicarbonate ions combine with hydrogen ions to form carbonic acid, which then dissociates into water and carbon dioxide. When fixed acids accumulate in the body, they compete with bicarbonate ions for hydrogen ions, leading to a decrease in bicarbonate concentration and ultimately causing acidosis.

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Answer:

9

Explanation:

- When constructing the Lewis structure as mentioned in the question we must first construct the skeleton with Br as the center atom and F surrounding it.

- Next we count the number of electrons on each atom in this case

Br - 7

2F - 7×2

In total we have 21

but because of the + charge in the final molecule we remove one electron in order to get the + charge so we have 20 electrons now

- Now we know we've already used up 2 pairs to join the Br and F atoms together so we're left with 8 more pairs, we start by distributing the electron pairs first to the F atoms and then give the remaining to the Br atom

- Br should 7 electrons ideally so here we see it'll have only 6, therefore Br gets the + charge

- Next just count the no of pairs and viola you have your answer which is 9

(Attached is the final structure of BrF2+)

No, a stationary state is one that has a specific amount of energy, total angular momentum, and parity; in a stable state, the particle is moving while possessing all of these physical characteristics.

A negative charge subatomic particle known as an electron can either be free or attached to an atom (not bound). Each of the three main types of components within an atom is an atom that is bonded to it; the other three are proton and neutrons.

The electron, the smallest constituent part of an atom, has a negative surface charge. Protons and electrons are present in an atom in a neutral state in an equal number. The hydrogen ion only possesses one atom or one proton. On the other way, the uranium atom possesses 92 protons, which means 92 electrons.

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Hey there!

We need to start this by finding the molar mass of (C₃H₅)₂S.

This molecule consists of 6 carbon atoms, 10 hydrogen atoms, and one sulfur atom. We need to add the molar masses of each atom up.

C: 6 x 12.01 = 72.06

H: 10 x 1.008 = 10.08

S: 1 x 32.07 = 32.07

-------------------------------

                    114.21 g/mol

Ok, now that we have established that the molar mass of (C₃H₅)₂S is 114.21 g/mol, we have 2.50 mol of (C₃H₅)₂S. If 1 mol has a mass of 114.21 g, then 2.50 mol will have a mass of 2.50 time 114.21.

2.50 x 114.21 = 285.525 grams

This should go to just three significant figures, so:

The mass of 2.50 mol of (C₃H₅)₂S is 286 grams.

Hope this helps!

The molecular mass of a 10g compound that has 30.066 × 10²³ atoms is 2.00g/mol.

The molecular mass of a substance can be calculated by dividing the mass of the substance by the number of moles.

molecular mass = mass ÷ no of moles

However, the number of moles of the substance must first be calculated by dividing the number of atoms by Avogadro's number.

no of moles = 30.066 × 10²³ ÷ 6.02 × 10²³

no of moles = 4.99moles

molecular mass = 10g ÷ 4.99 moles = 2.00 g/mol

Therefore, the molecular mass of a 10g compound that has 30.066 × 10²³ atoms is 2.00g/mol.

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The term ideal gases means the gases that obey the kinetic theory of gases.

The term Ideal gas is based on the idea of the kinetic molecular theory. These are the gases that obey the kinetic theory of gases.

This, from the kinetic theory of gases, an ideal gas is;

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According to kinetic-molecular theory, the following wouldn't be considered an ideal gas are: options B, C, and E.

Kinetic-molecular theory of gases states that all gas particles would exhibit a perfectly elastic collision and are constantly in motion.

According to kinetic-molecular theory, the following wouldn't be considered an ideal gas are:

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The volume of the gas at 175.0°C would be approximately 24.48 L.

To determine the volume of a gas at a different temperature using the ideal gas law, we can use the following formula:

V1 / T1 = V2 / T2

where:

V1 = Initial volume of the gas

T1 = Initial temperature of the gas

V2 = Final volume of the gas (which we want to find)

T2 = Final temperature of the gas (given in the question)

Given values:

V1 = 16.00 L

T1 = 20°C = 20 + 273.15 K (converting Celsius to Kelvin)

T2 = 175.0°C = 175 + 273.15 K (converting Celsius to Kelvin)

Plugging in the values into the formula:

16.00 L / (20 + 273.15 K) = V2 / (175 + 273.15 K)

Solving for V2, we get:

V2 = 16.00 L * (175 + 273.15 K) / (20 + 273.15 K)

Calculating the right-hand side of the equation:

V2 = 16.00 L * 448.15 K / 293.15 K

V2 = 24.48 L (rounded to two decimal places)

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