Please answer step by step.

Answer:

1.1713 moles

Explanation:

RFM of N2O5= (14*2)+(16*4)=108

Moles of N2O5= Mass/RFM= 63.25/108= 0.5856 moles

Mole ratio of N2O5:NO2 = 2:4

Therefore moles of NO2= 4/2*0.5856= 1.1713 moles

From the pair of values given, the ratio of the volume to the temperature for the first data pair is, 0.0026 cm³/K

A ratio is a comparison between two quantities showing how much one quantity differs from another.

From the data given, the first data pair is as follows ;

Ratio of volume to temperature = volume / temperature

Ratio = 0.72 / 276

Ratio = 0.002608 cm³/K

The significant figure's rule for division is the least number of significant figures used in the operation.

The least significant figure of the values given is 2.

Therefore, the ratio of the volume to the temperature for the first data pair is 0.0026 cm³/K

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Answer:

0.0026

Explanation:

edge 2022 it's the same answer for both parts

Answer:

protons

Explanation:

the protons and electrons of an element are the same amount however the neutrons are a different amount

An ionic bond can be formed between Na and O, Mg and F or Li and H since they have large differences in their electronegativity values.

Ionic bonds are the bonds present in ionic compounds.

Ionic bonds are formed due to the electrostatic forces of attraction that exist between oppositely-charged ions.

Ionic bonds are formed between elements whose electronegativity values are far apart.

Thus, based on the given electronegativity values, an ionic bond can be formed between Na and O, Mg and F or Li and H.

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An ionic bond can be formed between Na and O, Mg and F or Li and H since they have large differences in their electronegativity values.

Ionic bond, also called an electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.

Metal atoms form positive ions, while non-metal atoms form negative ions. The strong electrostatic forces of attraction between oppositely charged ions are called ionic bonds.

Ionic bonds are formed between elements whose electronegativity values are far apart.

Thus, based on the given electronegativity values, an ionic bond can be formed between Na and O, Mg and F or Li and H.

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From the coefficients of the equation, we know that for every 3 moles of water consumed, 1 mole of diphosphorus trioxide is consumed.

This means we need to find the mass of 0.75 moles of diphosphorus trioxide.

So, the formula mass of diphosphorus trioxide is:

Thus, 0.75 moles have a mass of:

it's true. answer is B.

a hypothesis is a stage before formation of theory. so when we put forward a hypothesis to prove something (in scientific observation) it can be proven true with the experiments conducted.

but of course it's can be proven wrong too, after the experiments conducted. then it is disregard.

a proven hypothesis (a true hypothesis)is the reason for theories.

Answer:

it's true. answer is B.

a hypothesis is a stage before formation of theory. so when we put forward a hypothesis to prove something (in scientific observation) it can be proven true with the experiments conducted.

but of course it's can be proven wrong too, after the experiments conducted. then it is disregard.

a proven hypothesis (a true hypothesis)is the reason for theories.

Explanation:

hope this helps :)

Answer:

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.

Titanium dioxide is a type of mixture if particles of titanium dioxide are insoluble in the liquid.

A mixture is composed of one or more pure substances in varying compositions.

A mixture is a material made up of two or more components joined together, but not chemically combined. In a mixture, a chemical reaction does not occur and each of its components maintains its identity and chemical properties.

A compound is a substance formed by the chemical combination of two or more different elements from the periodic table. The elements of a compound cannot be divided or separated by physical processes. They are not mixtures or alloys

An element is a type of matter made up of atoms of the same class.  It is an atom with unique physical characteristics, a substance that cannot be decomposed by a chemical reaction.

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Answer:

102 g Al₂O₃

Explanation:

To find the mass of Al₂O₃, you need to (1) convert grams Al to moles Al (via molar mass), then (2) convert moles Al to moles Al₂O₃ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Al₂O₃ to grams Al₂O₃ (via molar mass). It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 3 sig figs to reflect the given values.

Molar Mass (Al): 26.98 g/mol

Molar Mass (Al₂O₃): 101.96 g/mol

4 Al + 3 O₂ ---> 2 Al₂O₃

54.0 g Al          1 mole             2 moles Al₂O₃         101.96 g
--------------  x  -----------------  x  -----------------------  x  ----------------  =  102 g Al₂O₃
                        26.98 g               4 moles Al            1 mole

Answer: 102 for 54.0 and 136 for 64.0

Explanation:

The weight of fluorine released in to the air over 6 month will be 0.365 kg

Freon is a non-combustible gas that is used as a refrigerant in air conditioning applications.

This freon undergoes an evaporation process over and over again to help produce cool air that can be circulated throughout your AC system

Total number of weeks = 6 x 4 = 24

Mass leak rate of freon = 31.68 g/week

Mass leak rate of flourine = fluorine mass in freon / molecular mass of freon x leak rate

                                          = 19 x 3 / 118.5 x  31.68

                                          =  15.23 gm/week

Total fluorine leak in 6 month = 15.23 x 24 = 365.72 gm = 0.365 kg

​

Hence, The weight of fluorine released in to the air over 6 month will be 0.365 kg

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Answer:

Step 1: Identify the resistivity (ρ) , length (L), and radius (r) of the wire. Step 2: Calculate the cross-sectional area of the wire using the formula for the area of a circle: A=πr2 A = π r 2 . Step 3: Calculate the resistance (R) of the wire using the formula for resistance: R=ρLA R = ρ L A

Answer:

6.41 gm / cm^3

Explanation:

cube volume =    2.72 x 2.72 x 2.72 cm^3  = 20.124

Density =   mass / volume = 129 g / 20.124 cm^3 = 6.41 gm / cm^3

Blocks on the periodic table will not list a mass number of elements in this scenario.

This table comprises of elements in order of their atomic number which determines their chemical properties.

It contains the atomic number but however doesn't contain the mass number of the elements.

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The reaction that exemplifies a double replacement reaction is as follows: K2S + CoCI2 -> 2KCI + CoS, which is option 1.

A double replacement reaction is a type of reaction in which two elements are substituted in the reacting compounds.

In the reaction given as follows:

K2S + CoCI2 -> 2KCI + CoS

Therefore, the reaction is a type of double replacement reaction.

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2.258302785 x [tex]10^{23}[/tex] atoms of titanium are present in a sample containing 0.375 moles of Ti.

A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

To find the number atoms we need to multiply by 6.02214076 × 10^{23}.

0.375 moles x  6.02214076 × [tex]10^{23}[/tex]

2.258302785 x [tex]10^{23}[/tex]

Hence, 2.258302785 x [tex]10^{23}[/tex] atoms of titanium are present in a sample containing 0.375 moles of Ti.

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The balanced equation will be [tex]CH_4 + 2O_2 --- > CO_2 + 2H_2O[/tex]

The balanced equation of the reaction would be as follows:

[tex]CH_4 + 2O_2 --- > CO_2 + 2H_2O[/tex]

The mole ratio of methane to carbon dioxide is 1:1.

10 grams of methane will give 10/16 = 0.625 moles

0.625 moles of carbon dioxide would give 0.625 x 44.01 = 27.506 grams.

Thus, 10 grams of methane will produce approximately 27 grams of carbon dioxide stoichiometrically.

The reaction obeys the law of conservation of mass because the atoms of all the elements before and after the reaction are balanced.

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Explanation:

A is cortect answer dsfa

CH3COOH

Explanation:

hope I helped

if you get the answer right mark me as brainlyst

Answer:

They have different temperatures.

Explanation:

Answer:

a. when we are rolling the dough it only changes the shape, its a physical change.

b. we cant change the shape once its cooked, its a chemical change

Explanation:

hope it helps

Explanation:

The boiling point of liquid nitrogen, liquid argon, and liquid oxygen are -196°C, -186°C, and -183°C respectively. So, the correct order is nitrogen, argon, oxygen.

Nitrogen:

Since you don't want nitrogen to be condensing everywhere when it gets cold out, elemental nitrogen's boiling point is luckily below zero degrees Celsius. Thank goodness for nitrogen's extremely low boiling point. If it were at zero, boiling water would not produce a lot of heat, necessitating the use of a pressure cooker to prepare foods that typically call for boiling water. Additionally, since the air would be substantially enhanced with oxygen, items may catch fire more quickly (i.e. your home might burst in flame that much more easily). An ugly picture, to be sure.

Argon:

As nonpolar gases, Ar, F2, and Cl2 only display London Dispersion Forces (LDF). These largely negligible forces, which are the product of transient dipoles, must be resisted throughout the boiling process. Since bigger atoms and molecules have valence electrons further from their nucleus, LDF intensity is also directly correlated with atomic or molecular size. Compared to smaller atoms or molecules, these outermost electrons are less attracted to the positive nucleus or nuclei, making it simpler for them to create transient dipoles. As a result, the differing molar masses of each compound—Ar—39.95 g/mol, F—38.00 g/mol, and Cl—70.90 g/mol—can be used to explain the variation in boiling points.

Oxygen:

At 1 atm, oxygen would boil at -183 degrees Celsius if it were a liquid. Although the phase diagram for oxygen is more intricate than this, it is a general phase diagram. Imagine that the term "vaporization" is at the same height as 1 atm, which is roughly halfway up the y-axis. If the y value at that time was equal to 1 atm, the "vaporization" arrow to the right would be directly above -183 degrees Celsius. It's crucial to remember that pressure determines what temperature a substance will boil, melt, condense, or freeze, as you can probably guess. Additionally, the pressure in particular circumstances can affect what phase a material is in.

Answer:

The molecules of carbon dioxide are heavier than air. When a result, as they descend over the flame and candle, they push the oxygen and other air molecules out of the path. The oxygen can no longer react with the wax when it is pushed away from the wick. The flame is put out as a result.

Answer:

if the candle is burned in air with limited oxygen supply the candle will go out of fire as the oxygen is reducing....

Explanation:

Hope It Helps!!!

The most abundant isotope among the given Isotopes will be Isotope B

To calculate the percent abundance of each isotope in a sample of an element, we usually divide the number of atoms of a particular isotope by the total number of atoms of all isotopes of that element and then multiply the result by 100.

% Abundance =  15/50 x 100

                        =  30 %

% Abundance =  30/50 x 100

                        =  60 %

% Abundance =  5/50 x 100

                        =  10 %

Hence, The most abundant isotope among the given Isotopes will be Isotope B.

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Answer:

decane

Explanation:

decane has 10 carbon and 22hydrogen

Answer:

280 g Al₂O₃

Explanation:

To find the mass, you need to multiply the given value by the molar mass. This will cause the conversion because the molar mass exists as a ratio; technically, the ratio states that there are 101.96 grams per every 1 mole Al₂O₃. It is important to arrange the ratio in a way that allows for the cancellation of units. In this case, the desired unit (grams) should be in the numerator. The final answer should have 2 sig figs to reflect the given value (2.7 mol).

Molar Mass (Al₂O₃): 101.96 g/mol

2.7 moles Al₂O₃          101.96 g
------------------------  x  -------------------  = 275 g Al₂O₃  = 280 g Al₂O₃
                                     1 mole

Answer:

D - all of the above

Explanation:

Answer:

a. 1810mL

Explanation:

When conditions for a gas change under constant pressure (and the number of molecules doesn't change), it follows Charles' Law:

[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]  where the temperatures must be measured in Kelvin

To convert from Celsius to Kelvin, add 273, or use the equation:  [tex]T_C+273=T_K[/tex]

For this problem, one must also recall that standard temperature is 0°C (or 273K).

So, [tex]T_1 = 273[K][/tex], and [tex]T_2 = (49.4+273)[K]=322.4[K][/tex].

[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

[tex]\dfrac{(1532.7[mL])}{(273[K])}=\dfrac{V_2}{(322.4[K])}[/tex]

[tex]\dfrac{(1532.7[mL])}{(273[K\!\!\!\!\!{-}])}(322.4[K\!\!\!\!\!{-}] )=\dfrac{V_2}{(322.4[K]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----})}(322.4[K]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----})[/tex]

[tex]1810.04571428[mL]=V_2[/tex]

Adjusting for significant figures, this gives [tex]V_2=1810[mL][/tex]

Answer:

protein molecule

Explanation:

Answer: Protein

Explanation:

Amino acids from protein molecules.