What method could be used to separate the
components of gasoline?

Answer:

b

Explanation:

because it has gained an electron

[tex]F^-[/tex] ion is in a higher oxidation state than its normal ion. Hence, option B is correct.

An oxidation state is a number given to the atom of an element when participating in a chemical reaction.

The atoms of elements are not always neutral i.e. carry no charge. They sometimes carry either positive or negative charges to become ions.

[tex]F^-[/tex] is in a higher oxidation state than its normal ion because it has gained an electron.

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Answer:To calculate the molar mass, first calculate the number of moles of gas using the ideal gas equation. 1 atm. 750 mmHg. (1.00 L). 760 mmHg. 0.0306 mol. L atm.

Explanation:

Explanation:

20984Po→20582Pb+42α

4520Ca→4521Sc+0-1e+00ν

Explanation:

The alpha decay of polonum-209, which consists of the emission of an alpha particle, will leave behind the atom of a different element.

Notice that the identity of the element changes after the decay. This means that you're dealing with a nuclear transmutation, a process that converts an atom of a given element into an atom of a different element.

Answer:

The Lewis dot structure is not correct

Explanation:

Each atom ought to be surrounded by eight electrons or two electrons according to the octet rule. We now need to closely examine the structure to see if it fits into this description.

All the atoms in the molecule have the correct valence except the hydrogen which is directly attached to the oxygen.

The positive charge ought to mean that more than two bonds were formed between hydrogen and oxygen which is clearly not the case here.

Thus, the hydrogen atom attached directly to oxygen does not display the correct valence.

Answer:

Explanation:

The same. The force down (the weight of the barbells) is counter balanced by the weight up ( a person holding the barbells). A little later on, you are going to draw force diagrams showing that these two forces are drawn acting in opposite directions.

You can satisfy yourself by drawing a box and putting 1 arrow pointing up on the bottom and labeling it 756 up and another arrow on the top of the box pointing down and labeling it 756. They balance.

Answer:

Every science experiment should follow the basic principles of proper investigation so that the results presented at the end are seen as credible.

Observation and Hypothesis. ...

Prediction and Modeling. ...

Testing and Error Estimation. ...

Result Gathering and Presentation. ...

Conclusions. ...

Law Formation.

Answer:

1.06 × 10^5 J

Explanation:

We have to use the formula;

log(k2/k1) = Ea/2.303 ×R (1/T1 - 1/T2)

Given that;

k1 = 1.10 × 10-4 s-1

k2= 1.02 × 10-3 s-1

Ea=?

R=8.314 Jmol-1K-1

T1= 470. °C

T2= 510. °C

Hence;

log(1.02 × 10-3 s-1/1.10 × 10-4 =Ea/2.303 ×8.314(1/470 -1/510)

0.9672 = Ea/19.122(2.13 - 1.96) × 10^-3

0.9672= Ea/19.122(0.17) × 10^-3

0.9672= 1.7 ×10^-4 Ea/19.122

19.122 × 0.9672 = 1.74 × 10^-4Ea

Ea= 19.122 × 0.9672/1.74 × 10^-4

Ea= 18.495/1.74 × 10^-4

Ea= 1.06 × 10^5 J

Answer:

whick level are u on

I am not faking an answer but I cann arrange it to u if possible

An insect needs mud wallows to breed; that insect pollinates several flowers in that ecosystem.

Having mud in an ecosystem is important because Insects are very important as primary or secondary decomposers in the ecosystem. These insects need mud wallows to breed. That insect pollinates several flowers in that ecosystem.

Therefore, the mud in an ecosystem is most important as it provides a place for insects to breed and these insects play a major role in the ecosystem like pollination.

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Answer:

B)  Consumer COnsumer COnsumer

Answer:

Consumer

Explanation:

It is a consumer

Answer:

carboxyl group you said "functional group" not homologous series!

Answer:

Option "B":"Carboxyl group"

Explanation:

Answer:

fractionao distillation of two colourless liquids

Answer:

Pure substances have the ability to form predictable outcomes from their chemical reactions. Chemists tend to use pure substances when conduction chemial research as impure substances can mess up their experiments.

Answer:Effect of Catalysts on the Activation Energy. Catalysts provide a new reaction pathway in which a lower Activation energy is offered. A catalyst increases the rate of a reaction by lowering the activation energy so that more reactant molecules collide with enough energy to surmount the smaller energy barrier.

Explanation:

Your answer is in this

In a chemical equation which shows presence of catalyst, activation energy is altered.

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:

10 electrons

Explanation:

Answer:

0.500 mol/dm³

Explanation:

Using the formula below;

CaVa = CbVb

Where;

Ca = concentration of acid (mol/dm³)

Cb = concentration of base (mol/dm³)

Va = volume of acid (cm³)

Vb = volume of base (cm³)

In accordance to the information provided in this question is;

Va = 5cm³

Vb = 250 cm³

Ca = 12 mol/dm³

Cb = ?

Using CaVa = CbVb

12 × 5 = Cb × 250

60 = 120Cb

Cb = 60/120

Cb = 0.500 mol/dm³

Answer: The correct option is b) 1 and 4.

Explanation:

An ionic compound is formed when a complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).

The element (metal) that loses electrons forms a positive ion which is known as cation while the element (non-metal) that gains electrons forms a negative ion which is known as an anion.

Sodium chloride is an ionic compound that is formed by the combination of sodium and chloride ions.

Sodium is the 11th element of periodic table having electronic configuration of [tex]1s^22s^22p^63s^1[/tex]

It will lose 1 electron to form a positive in having a chemical formula of [tex]Na^+[/tex]

Therefore, the statements that say, sodium atoms form positive ions and sodium atoms will lose electrons are correct.

Thus, the correct option is b) 1 and 4.

Answer:

17000 joules.

Explanation:

Explanation:

With knowledge of the specific heat capacity of a substance, its mass, and the temperature change, we can convert this to the energy required for this temperature change using:

ΔH=mCΔT, where

ΔH=change in enthalpy (J)

m= mass of substance being heated (g) i.e. water in this question

C= specific heat capacity (J/g°C)

ΔT= change in temperature (°C)

We know mass=65g and ΔT=76°C−12°C=64°C

The specific heat capacity of water is 4.18J/g°C

Therefore, ΔH=65g⋅4.18Jg°C⋅64°C

=17388.8J

=17000J (2 significant figures)

Answer:

V = 0.24 L.

Explanation:

Hello there!

In this case, it is possible to approach this problem by using the ideal gas equation defined by:

[tex]PV=nRT[/tex]

Whereas our unknown is V, volume, and we solve for it as follows:

[tex]V=\frac{nRT}{P}[/tex]

Then since the STP conditions are ate 273.15 K and 1 atm, the volume of 0.011 moles of CO2 gas turns out to be:

[tex]V=\frac{0.011mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1atm}\\\\V=0.24L[/tex]

Regards!

Answer:

Chemistry

Explanation:

Chemistry helps connect the types of physcial sciences.

Answer:

c

Explanation:

The molarity of the HCl solution is 5M and the correct option is option C.

Molarity is a unit of concentration measuring the number of moles of a solute per litre of solution.

Chemists primarily need the concentration of solutions to be expressed in a way that accounts for the number of particles that react according to a particular chemical equation. Since percentage measurements are based on either mass or volume, they are generally not useful for chemical reactions. A concentration unit based on moles is preferable.

Given,

Volume of NaOH = 50 ml

Concentration of NaOH = 1M

Volume of HCl = 10ml

Concentration of NaOH × Volume of NaOH = Concentration of HCl × Volume of HCl

1 × 50 = c × 10

Concentration of HCl = 5 M.

Therefore, the molarity of the HCl solution is 5M and the correct option is option C.

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Answer:

3.01 × 10^24 atoms of vitamin D

Explanation:

The number of atoms, molecules or ions present in a substance is given by the Avogadro's number which is 6.02 × 10^23.

Hence;

1 molecule of vitamin D contains 6.02 ×10^23 atoms

5 molecules of vitamin D contains 5 × 6.02 ×10^23/1

= 3.01 × 10^24 atoms of vitamin D

Answer:

equal numbers of protons and neutrons

Answer:

3) C: Structure should have 6 carbon with double beginning on the 2nd carbon atom.

4) D: structure should have 5 carbon with triple bond beginning on the first carbon atom.

5) A: 4

Explanation:

3) The molecular formula for hexene is C6H12. This means it has 6 carbon atoms. However, the suffix "ene", means that it contains an alkene and thus it has 2 double bonds connecting 2 carbon atoms.

Looking at the options, the correct one is Option C.

4) The molecular formula for 1-pentyne is given by; C5H8.

This means there are 5 carbon atoms. However, the suffix "yne" means there is a presence of ethyne and thus it has triple bond.

Looking at the options, the only correct one is Option D

5) Since the number of carbon atoms are 3 and it has triple bond, then it means this is likely propyne

Now, the formula is C3H4 which is;

chemical formula CH3C≡CH

Thus, the number of hydrogen atoms with at least 1 carbon-carbon triple bond is 4.

Answer:

A

Explanation:

because ionic bond have stronger electrostatic force of attraction between oppositely  charged particles so it has higher boiling point than molecular which is covalent bond and have low boiling point hope this helps to understand ^_^

Answer: The mass of manganese(III) oxide produced is 113.03 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Given mass of zinc = 46.8 g

Molar mass of zinc = 65.38 g/mol

Plugging values in equation 1:

[tex]\text{Moles of zinc}=\frac{46.8g}{65.38g/mol}=0.716 mol[/tex]

The given chemical equation follows:

[tex]Zn+2MnO_2+H_2O\rightarrow Zn(OH)_2+Mn_2O_3[/tex]

By the stoichiometry of the reaction:

If 1 mole of zinc produces 1 mole of manganese(III) oxide

So, 0.716 moles of zinc will produce = [tex]\frac{1}{1}\times 0.716=0.716mol[/tex] of manganese(III) oxide

Molar mass of manganese(III) oxide = 157.87 g/mol

Plugging values in equation 1:

[tex]\text{Mass of manganese(III) oxide}=(0.716mol\times 157.87g/mol)=113.03g[/tex]

Hence, the mass of manganese(III) oxide produced is 113.03 g

Answer:

454

Explanation:

j