Also known as motion energy

Answer:

Carbon dioxide, sunlight, and water.

Explanation:

Answer:someone answer 4 b

Explanation:

123

Answer:

A

Explanation:

Answer:

b

Explanation:

Answer:

PET polymer or Polyethylene terephthalate is also known as Terylene. In the PET polymer, the ester linkage between the monomers is formed by the reaction of the OH group of ethylene diol (glycol) and the CO2H group of terephthalic acid.

In the family of polyester, PET is considered as the mostly used thermoplastic polymer resin.

It is used widely in clothing fibers, as liquid and food containers, and as a substance for engineering resins. In the United Kingdom it is known as terelyne, in the United States as Dacron, and in Russia as Lavsan.

Explanation:

bro the given address to subscribe and vaccine aur bhi

Answer:

V = 146.87 L

Explanation:

Given data:

Mass of sample = 14.0 g

Pressure of sample = 120 kpa

Volume of gas = ?

Temperature of gas = 30°C

Solution:

Number of moles of gas:

Number of moles = mass/molar mass

Number of moles = 14.0 g/ 2 g/mol

Number of moles = 7 mol

Pressure of gas:

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 8.31 KPa.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

30+273 = 303 K

by putting values,

120 KPa × V = 7 mol × 8.31 KPa.L/ mol.K  × 303 K

V = 17625.51 KPa .L/ 120 KPa

V = 146.87 L

Answer:

MgI₂, MgO, PbI₄, PbO₂

Explanation:

For an ionic compound to be formed, it must be neutral, that is the total positive charge must be equal to the total negative charge.

Mg²⁺ and I⁻: The neutral ionic compound requires 1 Mg²⁺ and 2 I⁻ and the resulting empirical formula is MgI₂.

Mg²⁺ and O²⁻: The neutral ionic compound requires 1 Mg²⁺ and 1 O²⁻ and the resulting empirical formula is MgO.

Pb⁴⁺ and I⁻: The neutral ionic compound requires 1 Pb⁴⁺ and 4 I⁻ and the resulting empirical formula is PbI₄.

Pb⁴⁺ and O²⁻: The neutral ionic compound requires 1 Pb⁴⁺ and 2 O²⁻ and the resulting empirical formula is PbO₂.

Answer:

+1

Explanation:

Na₂O₂

NOTE: the oxidation number of oxygen is always –2 except in peroxides where it is –1.

Thus, we can obtain the oxidation number of sodium (Na) in Na₂O₂ as illustrated below:

Na₂O₂ = 0 (oxidation number of ground state compound is zero)

2Na + 2O = 0

O = –1

2Na + 2(–1) = 0

2Na – 2 = 0

Collect like terms

2Na = 0 + 2

2Na = 2

Divide both side by 2

Na = 2/2

Na = +1

Thus, the oxidation number of sodium (Na) in Na₂O₂ is +1

Answer:

Dissolves in water

Explanation:

Answer:

12.

Explanation:

There are 12 atoms within 4 water molecules.

Answer:

See explanation

Explanation:

The heat capacity of a substance is determined by the chemical composition of the substance and its mass.

Now, if substances have equal masses, the substance with the lesser heat capacity undergoes the greater temperature change.

Hence, among the substances, the particular one with the lowest heat capacity is expected to undergo the greatest temperature change.

If equal masses of each substance absorb the same amount of heat, the substance which undergoes the greatest temperature change is: the one with the lowest specific heat capacity.

Specific heat capacity can be defined as the quantity of heat required to raise the temperature of a physical object or body per unit mass, by one degree Celsius (1°C) or one Kelvin (1 K).

This ultimately implies that, specific heat capacity is the quantity of heat absorbed or released per unit mass of a substance when its temperature increases by one degree Celsius (1°C) or one Kelvin (1 K).

Mathematically, the quantity of heat is given by the formula;

[tex]Q = mc\theta[/tex]

Where:

Making [tex]\theta[/tex] the subject of formula, we have:

[tex]\theta = \frac{Q}{mc}[/tex]

Deductively, a substance undergoes the greatest temperature change when its specific heat capacity is lowest and its mass remains constant.

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Answer:

1. increase higher   2. it would be decreased.

Explanation:

Answer:

E) M-18

due to the loss of water

Answer: Mass of H₂ needed to react with O₂ : 1.092 g

Further explanation

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

Reaction

O₂(g) + 2H₂(g) → 2H₂O(g)

mass of O₂ : 8.75 g

mol O₂(MW=32 g/mol) :

From the equation, mol ratio of O₂ : H₂ = 1 : 2, so mol H₂ :

Mass H₂ (MW=2 g/mol) :

.546 x 2 = 1.10 g

The term mole concept is used here to determine the mass of hydrogen. The mass of hydrogen is 1.10 g. Thus the correct option is B.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

The balanced equation when H₂ reacts with oxygen is:

2H₂ (g) + O₂ (g) → 2H₂O (g)

The molar mass of oxygen is 16.00 g/mol and the given mass is 8.75. Then the number of moles is:

8.75 g / 16.00 g/ mol = 0.546 mol

In the equation 1 mole of 'O' = 2 mole of 'H'

Then 0.546 mol 'O' = 0.546 × 2 mol of 'H' = 1.092 mol

The mass of H₂ needed to react with 8.75 g of O₂ is:

Mass = Number of moles × Molar mass

Here the molar mass of  H₂ is 1.00794 g/mol.

Then the mass is:

1.092 mol × 1.00794 g/mol = 1.10 g.

Thus the correct option is B.

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Answer:

= - 59.7 kJ/mol

Explanation:

The total volume of the solution is:

= (100 + 100 ) mL

= 200 mL

mass of the solution = 200 × 1.00 = 200 g

Heat gained by the solution:

= mass × specific heat × temperature change in solution

= 200× 4.184 × (25.3 - 24.6)

= 585.76 J

Heat gained by calorimeter

= heat capacity × change in temperature of caiorimeter

= 15.5 × (25.3 -24.6)

= 10.85 J

Thus, total heat released = total heat gained

= 585.76 + 10.85 J

= 596.61 J

The no of moles of AgNO3 = 100/1000 × 0.100 = 0.01 mol

The no of moles of NaCl = 100/1000 × 0.200 = 0.02 mol

From above, it is obvious that AgNO3 is the limiting reagent

∴

ΔH_{rxn} = total heat released/ moles of AgNO3

= -596.61/0.01

= 59661 J/mol

= - 59.7 kJ/mol

Answer:

Any situation that has a path that stops at the same position that it started from has a displacement of zero.

Explanation:

Answer:

As long as they end in the same position as they started in they are considered to have a displacement of zero.

Explanation:

ily

Answer:

1 it is rocky

Explanation:

here why because the crust is made of igneous metamorphic and sedimentary rocks

Answer:

2 ch3oh(l) + 3 o2(g)

Explanation:

because they are at the beginning and they are what are being changed.

In the given chemical reaction: [tex]\rm 2 CH_3OH(l) + 3 O_2(g) \rightarrow 2 CO_2(g) + 4 H_2O(g)[/tex], the reactants are [tex]\rm CH_3OH[/tex] and [tex]\rm O_2[/tex], respectively.

Reactants are the starting materials or substances that are consumed in a chemical reaction to produce new products.

The reaction is a combustion reaction, where a fuel (in this case, methanol) reacts with oxygen gas to produce carbon dioxide and water vapor.

[tex]\rm 2 CH_3OH(l) + 3 O_2(g) \rightarrow 2 CO_2(g) + 4 H_2O(g)[/tex]

The starting molecules (reactants) in this reaction is [tex]\rm CH_3OH[/tex] and [tex]\rm O_2[/tex], which reacts to produce [tex]\rm 2 CO_2(g)\ and\ \4 H_2O(g)[/tex] as the final product.

Therefore, [tex]\rm CH_3OH[/tex] and [tex]\rm O_2[/tex] are the reactants in the given chemical reaction, respectively.

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Answer:

law of conservation of mass

Explanation:

self explanatory

After the first steps in writing an  chemical equation, the equation is balanced by adding coefficients so that law of conservation of mass is obeyed.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

i dont uderstand collage

Explanation:

tough

Answer:

5.85 x 10⁻² mol Au

Explanation:

Divide the atoms of gold with Avogadro's number to find the solution.

Answer:

The correct answer is 4

Explanation:

Boron trifluoride (BF₃) has a molecular geometry (as shown in the image in the question) referred to as trigonal planar; this is because each of the the fluorine atoms/molecules (bonded to the central boron atom) is placed in such a way that they form the three "end points"/"domains" of an equilateral triangle. Hence, the correct option is the last option.

Answer:

i think it Na (sodium)

Explanation:

Answer:

See explanation and image attached

Explanation:

Here attached are resonance forms of pyrrole and pyridine. The images were obtained from quora and researchgate respectively.

Now, we can see that in the resonance forms of pyrrole, the nitrogen atom in the heterocycle has a formal charge of +1. However, in the six membered pyridine hetrocycle, the nitrogen atom may have a formal charge of -1 or +1 as shown in the canonical structures attached. The structures in which nitrogen has a +1 formal charge in pyridine are comparable to structures obtained from pyrrole. These structures have less contribution to the structure of pyridine.

Answer:

If you are meaning O2^2- ion, well, don’t forget that ions have a charge, that has to be specified when referring to them. It is a polyatomic ion just because it consists of more than one atom, irrespective of the fact that these atoms are of the same element or not. It was given that name because at the early times chemistry was founded as a science, it was found that with respect to other oxygenated substances, peroxides contained more oxygen than expected: Latin prefix per- gives the terms it is attached to the meaning of being increased, enhanced, and similar.

Explanation:

Answer:

i would also like to know

Explanation:

plz..............................................

i think its B ........

Answer:

0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.

Explanation:

The balanced reaction between tha surfuric acid and iron (III) hydroxide is:

Fe(OH)₃ + 3 H₂SO₄ → Fe(HSO₄)₃ + 3 H₂O

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactants and products participate in the reaction:

Being molarity (M) the number of moles of solute that are dissolved in a given volume:

[tex]Molarity=\frac{number of moles}{volume}[/tex]

then the number of moles can be calculated as:

number of moles= molarity* volume

So, if 58.42 mL ( 0.05842 L) of 0.09756 M iron (III) hydroxide react, then it means that the number of moles that react are:

number of moles= 0.09756 M* 0.05842 L

number of moles= 0.005699 moles

Now it is possible to apply the following rule of three: if by stoichiometry 1 mole of Fe(OH) ₃ reacts with 3 moles of H₂SO₄, then 0.005699 moles of Fe(OH) ₃ with how many moles of H₂SO₄ does it react?

[tex]moles of H_{2} SO_{4} =\frac{0.005699 moles ofFe(OH)_{3}* 3moles of H_{2} SO_{4} }{1mole ofFe(OH)_{3}}[/tex]

moles of H₂SO₄= 0.017097

Being sulfuric acid 0.2860 M, it is replaced in the definition of molarity:

[tex]0.2860M=\frac{0.017097 moles}{volume}[/tex]

Solving for the volume:

[tex]volume=\frac{0.017097 moles}{0.2860 M}[/tex]

volume= 0.05978 mL

0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.

The weight/weight percent(%w/w) of NaCl in  solution : 33.03%

Given

Mole fraction of NaCl : 0.132

Required

The weight/weight percent of NaCl

Solution

1 mol solution : 0.132 mol NaCl + 0.868 mol H₂O

mass NaCl :

[tex]\tt 0.132\times 58.44 g/mol=7.714~g[/tex]

mass H₂O :

[tex]\tt 0.868\times 18.016~g/mol=15.64~g[/tex]

Total mass = 7.714 + 15.64 = 23.354 g

[tex]\tt \%NaCl=\dfrac{7.714}{23.354}\times 100\%=33.03\%[/tex]