Convert 732.0 mmHg to atm

Answer:

"Energy Level" is the correct approach.

Explanation:

Answer:

Explanation:

Momentum is a vector quantity because it has both magnitude and direction

Answer:

Long Form of Periodic Table. The modern or long form of the periodic table is based on the modern periodic law. The table is the arrangement of elements in increasing order of their atomic numbers. The modern periodic table is the present form of the periodic table.

Answer:

Long Form of Periodic Table. The modern or long form of the periodic table is based on the modern periodic law. The table is the arrangement of elements in increasing order of their atomic numbers. The modern periodic table is the present form of the periodic table.

The liquid expands as its temperature increases like stated. This is the same as saying that it occupies more space as temperature increases. Therefore it 'uses up' more of the space inside the thermometer as the temperature increases. the relation with kinetic energy is through the kinetic energy being used as it flows and expands, because of the heat, and mercurys relationship with heat. sorry if that's off :/

Answer:

14

Explanation:

Answer:

Apex has more channels for the money than some other streaming services.

Explanation:

Due to lack of info:

you can't infer that Apex is reliable

you can't infer that other services charge more PER CHANNEL

you can't infer that other services are less desirable

The only reasonable inference would be my answer and I got it right on ED2020

Answer:

Or in other words B

to make it more simple

Explanation:

Answer:

gas

Explanation:

Answer:

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1.melting

2.freezing

3.vaporization

4.condensation

The density of Block A is equal to the density of Block B, therefore  statement  (c) is correct .

Density is the ratio between mass and volume or mass per unit volume.

The SI unit of density is kilogram per cubic meter (kg/m3).

It is  represented in the c g s unit of grams per cubic centimeter (g/cm3).

It is formulated by -:

Density=Mass/Volume

To calculate densities in each boxes -:

For Block A -

mass=2 kg

volume=  l b h

volume=5×2×1

volume=10 cm³

Therefore,

density for block A=mass/volume

density for block A=0.2 g/cm³

For Block B-

mass=2 kg

volume= l b h

volume=10cm³

Therefore,

density for block B=mass/volume

density for block B=0.2 g/cm³

For Block C-

mass=3 kg

volume= l b h

volume=10cm³

Therefore,

density for block C=mass/volume

density for block C=0.3 g/cm³

Hence the density of Block A is equal to the density of Block B ,therefore option (c) is correct.

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Explanation:

1.A physical property is an aspect of matter that can be seen or measured without changing its chemical composition. Examples of physical properties include color, molecular weight, and volume.

A chemical property is observed only by changing the chemical identity of a substance. In other words, the only way to detect a chemical is to perform a chemical reaction.

2.This property measures the ability of chemical change. Examples of chemical properties are reactivity, flammability, and oxidation state.

The physical properties of a substance do not involve any chemical reaction. These include density, color, mass, hardness, freezing points, electrical properties, and the like.

Chemical properties include the reaction of chemicals with other substances. These reactions lead to the disappearance of the raw material and the appearance of new materials that have different physical and chemical properties.

3.Chemical properties can be compared to physical properties; On the contrary, they are recognizable without changing the structure of matter. However, for many properties in the field of physical chemistry and other disciplines at the boundary between chemistry and physics, the distinction can be a matter for the researcher's point of view. The properties of materials, both physical and chemical, can be seen as metaphysical; This means that it is secondary to the principle of tangible reality. Multiple metamorphic layers are also possible.

Explanation:

In order to go from mass of magnesium to atoms of magnesium, we have to do two things:

   Convert mass of Mg to moles of Mg using the molar mass of Mg as a conversion factor

   Convert moles of Mg to atoms of Mg using Avogadro's number (6.02×1023) as a conversion factor

Step 1:

Before we start, I should note that the molar mass of Mg is 24.31gmol. We can go from mass to moles using dimensional analysis. The key to dimensional analysis is understanding that the units that you don't need any more cancel out, leaving the units that are desired:

48.60g

×1mol24.31g

=2.00mol

Step 2:

We'll use this relationship:

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Using the moles of Mg that we just obtained, we can use Avogrado's number to perform dimensional analysis in order to cancel out units of mol to end up with atoms of Mg:

2.00mol

×6.02×1023atoms1mol

=1.204×1024atoms

Thus, 48.60g of Mg is equivalent to 1.204×1024atoms

Hope this helped :)

Answer:

Chemical digestion involves the secretions of enzymes throughout your digestive tract. These enzymes break the chemical bonds that hold food particles together. This allows food to be broken down into small, digestible parts. Digestion involves taking large portions of food and breaking them down into micronutrients small enough to be absorbed by cells. Chewing and peristalsis help with this, but they don’t make particles small enough. That’s where chemical digestion comes in.

Chemical digestion breaks down different nutrients, such as proteins, carbohydrates, and fats, into even smaller parts:

Fats break down into fatty acids and monoglycerides.

Nucleic acids break down into nucleotides.

Polysaccharides, or carbohydrate sugars, break down into monosaccharides.

Proteins break down into amino acids.

Explanation:

I hope this helps!

Answer:

The correct option is;

A. Which sample has the higher purity

Explanation:

The information given relate to the presence of two samples of NaCl, from different sources

The only potential contaminant in each of the sources = KCl

The content of the sample = NaCl

The molar mass of NaCl = 58.44 g/mol

The molar mass of KCl = 74.5513 g/mol

Let the number of moles of KCl in the sample = X

For a given mass of NaCl, KCl mixture, we have;

The molar mass of potassium = 39.0983 g/mol

The molar mass of chlorine = 35.453 g/mol

The molar mass of sodium ≈ 23 g/mol

Therefore;

Each mole of KCl, will yield 35.453 g/mol per 74.5513 g/mol of KCl

While each mole of NaCl will yield 35.453 g/mol per 58.44 g/mol of NaCl

Therefore, the pure sodium chloride sample will yield more chlorine per unit mass of sample.

As such if the two samples have the same mass, the sample with the contaminant of KCl will yield less mass of chlorine per unit mass of the sample, from which the student will be able to tell the purity of the solution.

The sample with the higher purity will yield  a higher mass chlorine per unit mass of the sample.

The question that will be most likely answered is ( A ) ; which sample has the higher purity  

From the question there are two samples of NaCl from different sources that has a contaminant of KCl in each of them .

A student running an experiment to determine the percentage by mass of Chlorine in each sample is to determine which of the sample contains a lesser amount of the contaminant KCl.

Note : The purer the NaCl sample the more chlorine per unit mass of sample.

Hence the question that can be answered by this experiment is which sample has the higher purity.

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Answer:

(1) See below, (2) About 8.4 pH, (3) About 3.981 * 10⁻⁶ mol dm⁻³

Explanation:

1. A buffer is a solution that resist pH when adding a basic or acidic compound. It's purpose is to neutralize added acids and bases.

2. Remember that the formula for pH is -log [H+]. We have a 0.1 M solution of baking soda in water with [H+] of about 4.0 × 10⁻⁹. Therefore we can calculate the pH as follows...

pH = -log (4.0 × 10⁻⁹)

pH = -(-8.39794...) = (About) 8.4 pH of 0.1 M of baking soda

3. This question has a similar set up...

pH = -log [H+]

[H+] = inverse of log^- pH

[H+] = 10^-5.4 = (About) 3.981 [tex]*[/tex] 10⁻⁶

Explanation:

Alkali metals have low melting points, low electronegativity, and low ionization energies.  They are malleable and ductile.  They are also good conductors of heat and energy.

Since they have one electron in their valence, alkali metals are very reactive.  This means that they are not found alone in nature.

Answer:

All matter consists of indivisible particles called atoms. Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compound atoms. Hope that helps : )

hello,

here is your answer:

**********

Postulates of Dalton's atomic theory:

⇒ All matter is made up of very tiny particles called atoms.

⇒ Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.

⇒ Atoms of a given element are identical in mass and chemical properties.

⇒ Atoms of different elements have different masses and chemical properties.

⇒ Atoms combine in the ratio of small whole numbers to form compounds.

⇒ The relative number and kinds of atoms are constant in a given compound.

⇒ Atoms of the same elements can combine in more than one ratio to form more than one compound.

**********

hope this helped,

:)

Answer:

Lo más probable es que esté haciendo la conversión de Celsius a Kelvin

En ciencia, la unidad Kelvin se usa para medir la temperatura

La fórmula para Celsius a Kelvin es C + 273 = K

Explanation:

me das  coronita

Answer:

The volume of water vapor produced at STP is 11.60 L.

Explanation:

The decomposition reaction of H₂O₂ is:

2H₂O₂ → O₂ + 2H₂O     (1)

We have:

m(H₂O₂): mass = 17.0 g

M(H₂O₂): molar mass = 34 g/mol    

To find the volume of water vapor produced we need to find first the number of moles of H₂O₂ and H₂O:

[tex] n_{H_{2}O_{2}} = \frac{m}{M} = \frac{17.0 g}{34 g/mol} = 0.5 moles [/tex]

From the reaction (1) we have that 2 moles of H₂O₂ produce 2 moles of H₂O, so the number of moles of H₂O is:

[tex] 2n_{H_{2}O_{2}} = 2n_{H_{2}O} \rightarrow n_{H_{2}O} = 0.5 moles [/tex]

Now, we can find the volume of water vapor produced at STP, using Ideal gas law:

[tex] V = \frac{nRT}{P} = \frac{0.5 moles*0.085 L*atm/K*mol*273 K}{1 atm} = 11.60 L [/tex]  

Therefore, the volume of water vapor produced at STP is 11.60 L.

I hope it helps you!

Answer:

Acceleration is the correct answer. Hope this helps!

Explanation:

Answer:

The moon should be at 543 cm.

Explanation:

If according to scientists the distance from the earth to the moon is approximately 384400 km

.

The earth has a radius of 6371 km.

A basketball has a radius of 9 cm.  (Using a basketball of this radius as a reference)

With these data you can make a rule of 3:

The earth in centimeters has a radius of 6.371e+8 cm.

So: If the earth has a radius of 6.371e+8 cm and a distance to the moon of 384,400 km, what would the distance be if the earth had a radius of 9 cm?

6.371e+8 cm      :      9 cm

384400 km       :       X

X = (384400 km * 9 cm) / 6.371e+8 cm

X = 5.43e-3 km converting to centimeters would give that:

X = 543 cm

The moon should be at 543 cm from Earth.

The reason wet clothes spread out dry faster than when left in a pile is because there is more surface area therefore the rate of evaporation increases and this decreases the time it takes for the water molecules to diffuse into the air.

Answer:

Independent variable: Different tyre treads

Dependent variable: Breaking distance

Constant: Same car

Explanation:

In an experiment, an independent variable is that variable which the experimenter controls or manipulates to effect an outcome. In this experiment, the tyre treads are changed to see if it would affect the breaking distance, hence, the DIFFERENT TYRE TREADS is the independent variable.

On the other hand, a dependent variable is the variable that responds to the manipulation of the independent variable. In other words, it is the outcome of the experiment. In this experiment, the BREAKING DISTANCE is the responding or dependent variable.

Constant or controlled variable is that variable that is kept constant or unchanged throughout the course of the experiment. The constant, if changed, will influence the result of the experiment. The constant in this experiment is the CAR since the same car (unchanged) was used for the experiment.

Answer:

A

Explanation:

Benedict's test is the ideal standard test to distinguished between reducing(glucose) and Non reducing(diasaccharides,sucrose).

Benedict's tests gives a positive test for the presence of reducing sugar,with the initial mixture of the sugar solution changing from  the initials green and orange  color   and brick red precipate of copper (ii) ,which would not dissolve in solution.

However, with non reducing the Benedict's gives a negative test.Because no color change occurs.

In either case,the chemical reaction that occurs as the solution gained heat  is exothermic and this may lead to boiling of the solution and spilling onto the burner,which may lead to explosion.

Answer:

the proton

Explanation:

Inside an atom there are neutrons which  have a neutral charge (no charge) and protons which have a positive charge. Outside an atom there are electrons those have a negative charge.

Answer: I agree with the student because in the question prior to this One question stated thatExtensive properties very with the amount of matter ina sample, so yes i agree.

Explanation:

Answer:

Explanation:

Combustion can be defined as the burning of a compound in the presence of oxygen to produce carbon dioxide and water. Because it involves the release of heat (energy), it is referred to as an exothermic reaction.

Fuel is an organic compound and it's combustion will also go through the process above and also releases heat (exothermic reaction) into the atmosphere after burning. However, same can be said about forest fire also; as the forest is made up of plants (whose major constituents are organic also). The forest fire can also be termed as combustion because it burns in the presence of oxygen, releasing heat (energy) into the atmosphere (which also makes it an exothermic reaction).

A forest fire models the energy flow of fuel combustion by:

Combustion is the chemical process whereby there is a redox reaction that causes burning and produces smoke in the form of gas.

For combustion to occur, the following processes must occur:

As a result of this, a forest fire models the energy flow of fuel combustion by making use of a reactant like wood to create combustion.

Because this process expels energy, then it is known as an exothermic reaction.

Therefore, forest fire occurs:

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