one gallon of gasoline (3785 ml) has a mass of 2640 g. what is the density of gasoline​

Answer: Atoms are made of dust because God made us with dust.

Explanation:

Answer:

B :)

Explanation:

Trachea is were oxygen is entered :D (5 stars?)

4.56g excess reactant is left over when 17.0 g of potassium hydroxide (KOH) reacts with 20.0 g of iron (III) nitrate (Fe(NO₃)₃)

Reactants are raw materials that react with one another and form products.

Here given balanced reaction is

2KOH + Fe(NO₃)₂ → Fe(OH)₂ + 2KNO₃

Then we have to calculated the masses of KOH and Fe(NO₃)₂ from the balanced reaction

Molar mass of KOH = 39+16+1 = 56g/mol

Mass of KOH = 2×56 = 112g

And the molar mass of Fe(NO₃)₂ = 56+2[14+(16×3)]

= 56+2[14 + 48)]

= 56+2[62]

= 56+124

= 180g/mol

Then from the balanced equation

112g of KOH and 180g/mol of  Fe(NO₃)₂

Then the 17 g of KOH = 17×180/112g

= 27.32 g of Fe(NO₃)₂

Then for 20.0 g of iron (III) nitrate

Therefore Xg of KOH = 112×20/180

Xg of KOH = 12.44g

Thus 12.44g of KOH reacted

Therefore we have determine the leftover mass of the excess reactant

Mass of KOH leftover = ?

Mass of KOH leftover = (Mass of KOH given) – (Mass of KOH that reacted)

Mass of KOH leftover = 17 - 12.44g

Mass of KOH leftover = 4.56g

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Answer:A is correct

Explanation:

The molecular formula of Ascorbic acid is C6H8O6 having the molar mass of 176.14 g/ mole.

Ascorbic acid is known as the chemical name for Vitamin C. Ascorbic acid is commonly found in high concentrations in citrus fruit. This acid is also found in tomatoes, broccoli, and many other fruits and vegetables. Vitamin C is a nutrient of the body needs to form blood vessels, cartilage, muscle and collagen in bones. This vitamin is also vital to the body's healing process.

A molecular formula is defined as a chemical formula of a molecular compound that shows the kinds and numbers of atoms present in a molecule of the compound. This is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule using chemical element symbols and numbers.

A molecule of the ascorbic acid will have a mass of 176.124 atomic mass units.

This is determined by adding 6 X 12.011 for carbon + 8 X 1.008 for hydrogen + 6 X 15.999 for oxygen.

This is equals to the 72.066 for carbon + 8.064 for hydrogen + 95.994 for oxygen. Added together, these equal 176.124 molecular mass.

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Answer:

Iron reacts with chlorine gas to form ferric chloride. Thus two moles of Iron reacts with three moles of chlorine gas to form two moles of ferric chloride salt. Thus the coefficient of chlorine is 3.

Explanation:

Answer:

Metal Physical Properties:

Lustrous (shiny)

Good conductors of heat and electricity.

High melting point.

High density (heavy for their size)

Malleable (can be hammered)

Ductile (can be drawn into wires)

Usually solid at room temperature (an exception is mercury)

While solids have certain shape and volume, liquids only have definite volume but not shape, gases neither have shape nor volume. The level of energy is highest in gases, medium in liquid and lowest in solids. The compression of solids is difficult, liquids are nearly incompressible, but gases can be easily compressed.

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Answer:

8.24 mL

Explanation:

Density can be defined as mass per unit volume, according to the relationship shown in the attached image. Moles (a unit of measurement for small entities) can also be related to mass. Let's look at two formulas which would be useful for answering this question.

\(\boxed{\text{Density}=\frac{\text{Mass}}{\text{Volume}} }\)

\(\boxed{\text{Mole}\times\text{Mr}=\text{Mass (in grams)}}\) , where Mr stands for relative molecular mass

From the periodic table the Mr of nickel is 58.7.

Multiply the number of moles by the Mr:

Mass of Ni

= 1.25(58.7)

= 73.375 g

Calculate the volume of Ni:

Volume

= mass ÷density

= 73.375 ÷8.90

= 8.24 ml (3 s.f.)

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The therapeutic action of monoamine oxidase inhibitors (MAOIs) does not directly involve blocking neurotransmitter reuptake. Instead, MAOIs work by inhibiting the enzyme monoamine oxidase, which is responsible for breaking down neurotransmitters such as serotonin, dopamine, and norepinephrine.

By inhibiting this enzyme, MAOIs increase the availability of these neurotransmitters in the brain.

The increased levels of neurotransmitters can have various therapeutic effects, including:

Enhanced mood: By increasing the availability of serotonin, dopamine, and norepinephrine, MAOIs can improve mood and alleviate symptoms of depression.

Increased energy and motivation: The elevation of neurotransmitter levels can lead to increased energy levels and motivation.

Reduced anxiety: MAOIs can also have an anxiolytic effect by modulating neurotransmitter levels in certain brain regions.

It is important to note that the mechanism of action of MAOIs is complex and not fully understood. They can have other effects on various neurotransmitter systems, which contribute to their therapeutic actions.

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Answer:

Proton

Explanation:

It has a positive charge

Answer:

electron

Explanation:

Answer:

single replacement reaction is type of reaction is Au2S+H2---> 2Au+H2S.

A is the initial reaction when a chlorine bond splits into two chlorine radicals.

In chemistry, a radical is an atom, molecule, or ion that has an unpaired valence electron.

The question is based on Radical Chain Reaction. And these reactions have three different phases: Initiation, Propagation and Termination.

Reaction A- Initiation

Reaction B- Termination

Reaction C- propagation

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The new volume of the balloon at a pressure of 0.85 atm will be approximately 17.65 L.

Combined gas law can be used to solve this numerical, which relates the pressure, volume, and temperature of a gas:

P1V1/T1 = P2V2/T2

where P1 and V1 are the initial pressure and volume, respectively, and T1 is the initial temperature. P2 and V2 are the final pressure and volume, respectively, and T2 is the final temperature, we can use the combined gas law to find the new volume of the balloon when it is taken to Denver:

we can say that:-

P1V1/T1 = P2V2/T2

(1.0 atm)(15 L)/(293 K) = (0.85 atm)(V2)/(293 K)

Simplifying:

V2 = (1.0 atm)(15 L)/(0.85 atm) = 17.65 Lvely, and T2 is the final temperature.

Note: here we have assumed that the temperature remains constant.

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Total slack can be used without coordinating with managers of succeeding activities. The correct option is A.

Total slack refers to the amount of time that an activity can be delayed without affecting the overall project completion time or the start time of the succeeding activities. It is an indicator of the flexibility of the schedule and can be used by a project manager to identify activities that can be delayed without affecting the overall project completion time.

Total slack can be calculated by subtracting the duration of the activity from the difference between the late finish time and the early start time of the succeeding activity. Since total slack does not affect the start time of succeeding activities, it can be used without coordinating with the managers of the succeeding activities.

On the other hand, free slack, critical float, and float pad all require coordination with the managers of the succeeding activities as they can impact the start time of the succeeding activities. Therefore, correct option is A. Total slack.

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Answer:

Winter

Explanation:

Answer:

winter

Explanation:

because it is away from the sun

Answer: it’s A

Explanation:

Answer:

It's A

Explanation:

Answer:

D.lodine

Explanation:

Lodine is a nonsteroidal anti-inflammatory drug . It works by reducing hormones that cause inflammation and pain in the body. Lodine is used to treat mild to moderate pain, osteoarthritis, or rheumatoid arthritis.

I hope it's helpful for you......

Answer:

that by living near the poles, people might be able to survive on Mars

Explanation:

The total moles of atoms in a sample of propane, C3H8, that contains 13.7 moles of carbon atoms is 41.1 moles. The molecular formula for propane is C3H8. This means that one molecule of propane contains three carbon atoms and eight hydrogen atoms.

To find the total moles of atoms in the sample, we need to calculate the number of hydrogen atoms. We can do this by using the mole ratio of carbon atoms to hydrogen atoms in the molecule. Carbon atoms: 3 moles C in 1 mole C3H8Hydrogen atoms: 8 moles H in 1 mole C3H8If there are 13.7 moles of carbon atoms in the sample, then there must be:(13.7 moles C)(8 moles H / 3 moles C) = 36.27 moles H So the total number of moles of atoms in the sample is:13.7 moles C + 36.27 moles H = 49.97 moles (rounded to two decimal places)

However, we need to be careful with significant figures since the given value of 13.7 moles only has three significant figures. Therefore, the final answer should be rounded to three significant figures, giving:49.9 moles (rounded to three significant figures).Hence, the total number of moles of atoms in the sample is 49.9 moles.

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Explanation:

the volume will decrease..

decrease in temperature causes a decrease in the kinetic energy of the particles of the gas molecules

and the particles will be moving at a slower rate

Answer:

.-.

Explanation:

97°F is equivalent to 36.1°C.

A temperature unit developed from the SI (International System of Units) is Celsius (symbol: °C).

Prior to the adoption of the metric system, Fahrenheit (symbol: °F) was a commonly used measurement of temperature.

To convert Fahrenheit (°F) to Celsius (°C) we have to first subtract 32 from Fahrenheit and then multiply it by .5556 or 5/9.

We have to convert 97 degrees Fahrenheit (°F) to Celsius (°C),

We can use the following formula:

°C = (°F - 32) x 5/9

As per the given information,

°F = 97

Substituting the value 99.3 for °F, we get:

°C = (97 - 32) x 5/9

°C = 36.1

Therefore, 97°F is equivalent to 36.1°C.

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Question:- What is 97 °F in °C?

The molecule that will not be oxidized by chromic acid is \((CH_3)_3CO_H\).

Chromic acid (\(H_2Cr_O4\)) is a strong oxidizing agent that is commonly used to oxidize primary and secondary alcohols to carboxylic acids and ketones, respectively. However, it cannot oxidize tertiary alcohols, such as \((CH_3)_3CO_H\), because there is no hydrogen atom attached to the carbon atom that is bonded to the hydroxyl group. Therefore, there is no way for the chromic acid to remove a hydrogen atom and create a double bond with the oxygen atom, which is necessary for the oxidation reaction to occur.

In contrast, the other three molecules, \(CH_3CH_2CH_2CH_2OH, (CH_3)_2CHCH_2OH, and CH_3CH_2CH_{OH}CH3\), are all primary or secondary alcohols and can be oxidized by chromic acid.

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The amount of heat released when 32g of water cools from 46°C and freezes is 6182.4 J

Heat: This is a form of energy that brings about the sensation of warmth. The S.I unit of heat is Joules (J)

⇒ Formula:

⇒ Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

Note: The negative sign tells that heat is released and as such can be ignored.

Hence, The amount of heat released is 6182.4 J

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Answer: 100 mL

Explanation:

Answer:

0.375 moles Al

Explanation:

To find the moles Al, you need to (1) convert grams AlCl₃ to moles AlCl₃ (via molar mass) and then (2) convert moles AlCl₃ to moles Al (via mole-to-mole ratio from equation coefficients). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the sig figs of the given value (50.0 g).

Molar Mass (AlCl₃): 26.982 g/mol + 3(35.453 g/mol)

Molar Mass (AlCl₃): 133.341 g/mol

2 Al(s) + 3 CuCl₂(aq) -----> 3 Cu(s) + 2 AlCl₃(aq)

50.0 g AlCl₃           1 mole                 2 moles Al
--------------------  x  ------------------  x  -----------------------  =  0.375 moles Al
                               133.341 g           2 moles AlCl₃