I got it wrong plsss someone help me​

Answer:No, it is He

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The fuel released 90 calories of heat.

Let suppose that water experiments an entirely sensible heating. Hence, the heat released by the fuel is equal to the heat absorbed by the water because of principle of energy conservation. The heat released by the fuel is expressed by the following formula:

[tex]Q = m\cdot c \cdot \Delta T[/tex] (1)

Where:

If we know that [tex]m = 10\,g[/tex], [tex]c = 1\,\frac{cal}{g\cdot ^{\circ}C}[/tex] and [tex]\Delta T = 9\,^{\circ}C[/tex], then the heat released by the fuel is:

[tex]Q = (10\,g)\cdot \left(1\,\frac{cal}{g\cdot ^{\circ}C} \right)\cdot (9\,^{\circ}C)[/tex]

The fuel released 90 calories of heat.

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This problem is describing a gaseous system composed by 12.0 L of nitrogen and 4.00 L of dinitrogen monoxide at 250 K and 0.550 atm. In addition, it is asking for the entropy of the system assuming it is ideal and the volumes are additive; this means we can use the following equation for the entropy of the mixture:

[tex]S_{mix}=-n_{N_2}*R*ln(\frac{n_{N_2}}{n_{N_2}+n_{N_2O}} )-n_{N_2O}*R*ln(\frac{n_{N_2O}}{n_{N_2}+n_{N_2O}} )[/tex]

It means we need to calculate the moles of both gases, which can be obtained by using the ideal gas equation for the common T,P conditions and the volume of each gas:

[tex]n_{N_2}=\frac{PV_{N_2}}{RT} =\frac{0.550atm*12.0L}{0.08206\frac{atm*L}{mol*K}*250K} =0.322mol\\\\n_{N_2O}=\frac{PV_{N_2O}}{RT} =\frac{0.550atm*4.00L}{0.08206\frac{atm*L}{mol*K}*250K} =0.107mol[/tex]

Next, we recall the aforementioned equation for the calculation of the entropy and plug in the values:

[tex]S_{mix}=-8.3145\frac{J}{mol*K}[0.322mol*ln(\frac{0.322mol}{0.322mol+0.107mol} )+0.107mol*ln(\frac{0.107mol}{0.322mol+0.107mol} )]\\\\S_{mix}=2.00\frac{J}{mol*K}[/tex]

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The volume percentage of 18 L of isopropanol in 45 L of water is 28.57%

Total solution = volume of water + volume of isopropanol

Total solution = 18L + 45L

Total solution = 63L

Volume of isopropanol = 18L

% volume of 18L isopropanol = 18/63 * 100

% volume of 18L isopropanol = 1800/63

% volume of 18L isopropanol = 28.57%

Hence the volume percentage of 18 L of isopropanol in 45 L of water is 28.57%

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Answer:

Both come from vegetable sources; pectin is a soluble fiber found in plants, while agar comes from various species of algae. Chemically, they're closely related, and both consist of long strands of sugar molecules.

Explanation:

Answer:

C.) 0.85m

Explanation:

If you moved it for 3 seconds and it went 0.65m then continued to move for another 0.20m you would just add the two numbers together.

0.65+0.20=0.85m

Answer: A and C

Explanation: For example, the compound HCl (hydrogen chloride) is comprised for 2 different types of atoms: one hydrogen and one Chlorine. In order to fuse these two elements together to form a compound, they must bond in one of three ways- ionic, covalent or metallic

The two statements that are true are as follows:

Thus, the correct options for this question are A and C.

A chemical compound may be defined as a type of chemical substance that is mainly composed of many similar molecules that contain atoms of more than one chemical element. These atoms are typically held together by chemical bonds.

If you take the example of NaOH where you will find three elements such as sodium, oxygen, and hydrogen. Each of these chemical elements is held together by chemical bonds in order to form sodium hydroxide.

The atoms of sodium hydroxide would not change their chemical formula when it is present as a chemical compound.

Therefore, the correct options for this question are A and C.

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i don't remember yeah yosj

An inorganic acid......

Commonly used mineral acids are sulfuric acid, hydrochloric acid and nitric acid (they are also known as bench acids). Mineral acids range from superacids (perchloric acid) to very weak ones(boric acid). Mineral acids tend to be very soluble in water and insoluble in organic solvents.

Answer

Your stomach is a muscular organ that digests food. It is part of your gastrointestinal (GI) tract. When your stomach receives food, it contracts and produces acids and enzymes that break down food. When your stomach has broken down food, it passes it to your small intestine.

Explanation:

Answer:4.25 x 10^24 atoms N

Explanation:

all you have to do is the equatequation in the calulator and there you go.

Explanation:

Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. ... This extra carbon dioxide is lowering the ocean's pH, through a process called ocean acidification.

Answer:

30

Explanation:

Answer:

MgCl2 +2K= 2KCl+ Mg

Explanation:

I think MgCl2 you meant

Answer:

Sugar is a molecule made up of 12 carbon atoms, 22 hydrogen atoms, and 11 oxygen atoms that is white in color. It is formed of the elements carbon, hydrogen, and oxygen (C12H22O11). Sugar is a carbohydrate, which means it is made up of these three components like all other molecules.

Explanation:

Hope it helps:)

Now

[tex]\\ \sf\longmapsto Q=mc\Delta T[/tex]

[tex]\\ \sf\longmapsto c=\dfrac{Q}{m\Delta T}[/tex]

[tex]\\ \sf\longmapsto c=\dfrac{4390}{1.95(17.8)}[/tex]

[tex]\\ \sf\longmapsto c=\dfrac{4390}{18.69}[/tex]

[tex]\\ \sf\longmapsto c=234.8J/kg°C[/tex]

Answer:

15lb

Explanation:

A 15lb pound of turkey will thaw faster compared to 25lb because it's not only smaller but the weight of the turkey affects how temperature circulates throughout.

Hope this helps :)

The turkey weighing 15 lb will thaw faster as it has lesser mass, and required less time.

Thawing has been the process of warming up the substance for converting freezed to a soft liquid and solid. The time required for thawing has been proportional to the energy required to change the substance state.

The turkey has been given of weight 15 lb and 25 lb. The more the weight, there has been more energy has been required for thawing.

Thus, 15 lb turkey will thaw faster as compared to the 25 lb turkey.

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Answer:

had this quetionn

Explanation:

B :))

The molar solubility of magnesium oxalate Mg(C2O4 ) in water is 9.3 x 10⁻³ mol/L. So, the correct option is D.

Molar solubility of a substance is defined as the number of moles of solute that can be dissolved to make one litre of a saturated solution.

Here,

The solubility product constant of magnesium oxalate, Ksp = 8.6 x 10⁻⁵

The reaction for dissociation of magnesium oxalate in water can be written as,

MgC₂O₄ + H₂O ⇆ Mg²⁺ + C₂O₄²⁻

Magnesium oxalate is a binary salt.

So,

The molar concentration of  Mg²⁺ = molar concentration of C₂O₄²⁻

[Mg²⁺] = [C₂O₄²⁻] = x

The solubility product constant of MgC₂O₄,

Ksp = [Mg²⁺] [C₂O₄²⁻]

Ksp = x²

Therefore,

Molar solubility of MgC₂O₄,

x = √Ksp

x = √8.6 x 10⁻⁵

x = 9.3 x 10⁻³ mol/L

Hence,

The molar solubility of magnesium oxalate Mg(C2O4 ) in water is 9.3 x 10⁻³ mol/L.

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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:

A

Explanation:

all the other answers are wrong or not applicable. hope this helps :)

Answer:

1. D: melting point, boiling point, surface tension, and vapor pressure

2. I’m not too sure about the second one. Maybe D Mix ice with water until just before equilibrium is reached but some ice remains that is still melting. However I am unsure. So do not take my word for it

Explanation:

The properties that a student can design an investigation of the electrostatic forces between molecules in a substance are  melting point, boiling point, surface tension, and vapor pressure.

To determine the melting point of ice, which procedure would best help measure the melting point temperature is to Mix ice with water until equilibrium is reached but some ice remains that is still melting.

Intermolecular forces are regarded as the forces of attraction or repulsion that exist or act between close particles  of atoms, molecules, or ions.

The slow heating rate at the melting point is important in order to get an the measurement.

When an individual heat ice, its temperature often rises, but as soon as the ice starts to melt, the temperature stays constant until all the ice has melted.

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Answer:

Planarian

Explanation:

Answer: C=1

Explanation: If you round 1.04 to a single digit its 1

Answer:

air is the option so yeah it's right

errrrrrrrrrrrrreeeeeeeeeeeerrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

Answer: If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapor as it gets warmer.

The water particles in a pot of boiling water are behaving very differently from the water particles in the steam above the pot.

The water particles in the pot are tightly packed together. They are constantly moving, but they are not free to move around as much as the water particles in the steam.

The water particles in the steam are much farther apart. They are also moving much faster than the water particles in the pot. This is because the steam has been heated to the boiling point, which means that the water molecules have enough energy to escape from the liquid state and become a gas.

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Answer:

the picture is kinda blurry

Explanation:

Answer:

B

Explanation:

Each chlorine atom has 7 valence electrons. One from each of the Chlorine atoms bonded with one Phosphorous atom, leaving the rest of the pairs, 3 pairs each adding up to six, unbonded

The Lewis dot model of a molecule ( Phosphorous Chloride ) is  each chlorine has three non-bonded pairs and one bonded pair of electrons. Therefore, option B is correct.

Lewis' model demonstrated that, as long as the opportunity cost of labor to the capitalist sector is low, low wages and poverty will continue to exist in a labor surplus economy.

The Richard Lewis model of cultural diversity proposes that all cultures can be divided into three categories: linear-active, multi-active, and reactive. The Lewis model is a triangle made up of these three distinctly different cultural groupings.

The diagrams known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.

Thus, option B is correct.

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