please answer this correctly​

Answer:

5 significant figures.

Explanation:

The decimal place makes the zeros significant.

The component that would be the solvent from the graph would be nitrogen.

From the graph, nitrogen takes up 78%, oxygen had 21%, while the remaining gases take the remaining 1%.

A solvent is a substance or the component of a solution that has the capacity to dissolve other substances

In a mixture consisting of 2 or more substances, the substance with the highest volume usually acts as the solvent.

In this case, nitrogen holds the highest volume of all the gases in the graph. Thus, it can be considered as the solvent while the remaining gases are the solutes.  

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Answer:

It is melting chocolate and freezing water.

Explanation:

If your melting melting chocolate it would turn into a liquid and if you freeze

water then you are turning liquid to a solid.

Melting chocolate and freezing water are the examples of phase change.

A phase change is a change in the states of matter. For example, a solid may become a liquid. This phase change is called melting. When a solid changes into a gas, it is called sublimation.

A phase transition is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter: solid, liquid, and gas.

There are eight thermal processes through which matter can attain phase change. They are melting, freezing, evaporation, condensation, sublimation, deposition, ionization, and recombination.

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The final pressure of the gas mixtures is 72.48 atm.

The given parameters;

The number of moles of the gases is calculated as follows;

[tex]number \ of \ moles \ of \ oxygen = \frac{88}{16} = 5.5 \ moles\\[/tex]

[tex]number \ of \ moles \ of \ argon = \frac{33}{40} = 0.825 \ moles\\[/tex]

The total number of moles of the gas mixture;

= 5.5 + 0.825

= 6.325 moles

The final pressure of the mixture is calculated as follows;

PV = nRT

[tex]P = \frac{nRT}{V} \\\\P = \frac{6.325\ mol \times (0.0821 \ L.atm/mo.K) \times (62+273)}{2.4 \ L} \\\\P = 72.48 \ atm[/tex]

Thus, the final pressure of the gas mixtures is 72.48 atm.

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In the reaction between Fe₂S₃(s) and HBr(aq), the sum of the coefficients for all reactants and products is 12.

If the reaction occurs between Fe₂S₃(s) and HBr(aq) and the equation is properly balanced with the smallest whole-number coefficients, what is the sum of the coefficients for all reactants and products?

Let's consider the unbalanced equation for the reaction between Fe₂S₃(s) and HBr(aq). This is a double displacement reaction.

Fe₂S₃(s) + HBr(aq) ⇒ FeBr₃(aq) + H₂S(g)

We will balance it using the trial and error method.

First, we will balance Fe atoms by multiplying FeBr₃ by 2.

Fe₂S₃(s) + HBr(aq) ⇒ 2 FeBr₃(aq) + H₂S(g)

Then, we will balance S atoms by multiplying H₂S by 3.

Fe₂S₃(s) + HBr(aq) ⇒ 2 FeBr₃(aq) + 3 H₂S(g)

Finally, we will get the balanced equation by multiplying HBr by 6.

Fe₂S₃(s) + 6 HBr(aq) ⇒ 2 FeBr₃(aq) + 3 H₂S(g)

The sum of the coefficients for all reactants and products is:

[tex]1 + 6 + 2 +3 = 12[/tex]

In the reaction between Fe₂S₃(s) and HBr(aq), the sum of the coefficients for all reactants and products is 12.

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Answer:

2Ca +O2 ----------> 2CaO ( Balanced Reaction)

The balanced chemical equation for the standard formation reaction of solid calcium oxide (CaO) is

Ca + O2 --> CaO2

A balanced chemical equation is an equation in which the the number of atoms of each elements on both the reactant and products sides are equal.

Calcium oxide is an alkaline which is solid at room temperature and is formed by the reaction of one atom of calcium and two atoms of oxygen.

Therefore, the balanced equation of formation reaction of solid calcium oxide (CaO) is Ca + O2 --> CaO2.

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Answer:

Both physical and chemical changes

Answer:

homogenous

Explanation:

its a pure element, so it is a pure substance

Answer: 432 grams

Explanation:NaBr must he measure out to have 4.20 moles.

Answer:

they have the maximum number of valence electrons their outer shell can hold.

Explanation:

Answer:

because of it being that you have inferno dragon plsss

Answer:

c. saturated

d. unsaturated

e. The solute isn't in the table G, so it is impossible to know

f. saturated

g. saturated

h. supersaturated

4. About 73 g

5. About 55 °C

6. About 58 °C

The equation of reacting ammonium chloride with calcium nitrate will be: [tex]Ca(NO3)_2(s) + 2NH_4CI(s) --- > 2N_2O(g) + CaCl_2(s) + 4H_2O(g)[/tex]

They are reactions involving chemical reactants.

Ammonium chloride, in solid form, will react with calcium nitrate, also in solid form to produce dinitrogen oxide gas, solid calcium chloride, and water vapor.

The equation of the reaction is represented as follows:

[tex]Ca(NO3)_2(s) + 2NH_4CI(s) --- > 2N_2O(g) + CaCl_2(s) + 4H_2O(g)[/tex]

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The given elements are Na, Ag and Au.

1. Sodium(Na)

Mass number= 23 u

Atomic number=11

Number of protons= Number of electrons= Atomic number=11

Number of neutrons= Mass number- Number of protons=23-11=12

2. Silver (Ag)

Mass number= 108 u

Atomic number= 47

Number of protons= Number of electrons= Atomic number= 47

Number of neutrons= Mass number- Number of protons=108-47=61

3. Gold (Au)

Mass number= 197 u

Atomic number= 79

Number of protons= Number of electrons= Atomic number= 79

Number of neutrons= Mass number- Number of protons= 197-79=118

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Answer:

Answer should 133

Explanation:

all you have to do is add the protons and neutrons

The mass number for an atom of xenon containing 54 protons and 75 neutrons is 129 amu.

The Atomic mass of any atom may be defined as the mass of an atom that is togetherly constituted by protons and neurons in the nucleus of an atom. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number).

The mass number of Xenon is calculated by the following formula:

The Number of neutrons = Mass number - Atomic number.

where, number of neutrons = 75, and number of protons = 54.

75 = Mass number - 54 (number of protons = atomic number).

Mass number = 75 + 54 = 129 amu.

Therefore, the mass number for an atom of xenon containing 54 protons and 75 neutrons is 129 amu.

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Answer:

Taylor drinks 4 liters of water

Explanation:

2 litters of water per concert

2 concerts is 2x2=4

The amount of table salt (in grams) contains this quantity of sodium is 5.844 g.

Table salt is made up of sodium and chloride. The chemical formula of table salt is NaCl. This is a common salt used daily in the kitchen. This gives us a taste of food. And it is also necessary for the body.

The RDI for sodium for adults is given that is 2300 mg. The quantity of sodium is given = 2300 mg = 2.30 g (since the answer is asked in grams)

As we know, table salt is NaCl.

The molar mass of table salt (NaCl) is 58.44 g/mol

The molar mass of sodium (Na) is 23.00 g/mol

So, for 23.00 g sodium, we need 58.44 g NaCl.

And, for 2.30 g sodium we require (58.44 g x 2.3 g) / 23 g = 5.844 g = 6 g (to one significant figure).

Therefore, the amount of sodium is present in 5.844 grams of table salt.

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Two limitations of the student's models are that the models do not explain why the phenomenon occurs and the models only record the phenomenon in a limited way

Understanding a specific phenomenon requires gathering and analyzing data thoroughly because the researcher needs to collect data that is directly related to the phenomenon and this data needs to be complete and accurate to have reliable conclusions.

In this situation, the student created some models of the routes of the sandhill crane's migration. This data has two main limitations:

Based on this, two limitations of the models are that they do not explain the phenomenon and the data is not complete.

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Answer:

The substance that is dissolved in another substance to create a solution is a Solute. A Solute is a minor component in a solution which is a substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.

Answer:

Inhaling large concentrations of uranium can cause lung cancer from the exposure to alpha particles. Uranium is also a toxic chemical, meaning that ingestion of uranium can cause kidney damage from its chemical properties much sooner than its radioactive properties would cause cancers of the bone or liver.

Explanation:

Answer:

That would be 2.51293615

Explanation:

1 liter is equal to 0.264172 gallons.

What you would need to do is, multiply the total number of liters, which in this case is 9.5125, by 0.264172.

9.5125 x 0.264172 gets you 2.51293665.

I hope this helps! :)

The mass of the Pyrex glass that absorbs 1940J of energy is 79.52grams.

The mass in a calorimetry procedure can be calculated using the following formula:

Q = mc∆T

Where;

According to this question, an unknown mass of each of the following substances, initially at 23.0∘C , absorbs 1940 J of heat. The final temperature is recorded as indicated. The mass can be calculated as follows:

1940 = m × 0.753 × (55.4°C - 23.0°C)

1940 = 24.39m

m = 79.52grams.

Therefore, 79.52grams is the mass of the pyrex glass.

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Answer:

it would prob be planet y

Answer:

True

Explanation:

Answer:

He did not boil his broth long enough and the flasks were not cleaned prior to the experimenter

The mass of H2O is produced by the combustion of 1.00 mol of CH4 is 36.0 grams.

The term molar mass is defined as the mass of 1 mole of that particular substance and number of grams per mole of a compound.

The balance chemical equation is as follows:

CH4(g) + 202(g) → CO2(g) + 2H2O(e)

The mass of H2O = 36.0 g

Calculating the mass of H2O produced

mass of H2O = 1.00 mol CH4 × (2 mol H2O / 1 mol CH4) × (18.015 g H2O / 1 mol H2O)

mass H2O = 36.0 grams

Thus, The mass of H2O is produced by the combustion of 1.00 mol of CH4 is 36.0 grams.

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