I need help with that question please help me I really need it so much I been struggling and stressing a lot please it is due today at 11:00 so I will mark brainlist

Answer: It would make the greenhouse effect stronger :)

Explanation:

Answer:

At least one atom contains an organic compound molecule. (1) sugars (3) sugar.

Explanation:

At least one atom contains an organic compound molecule. (1) sugars (3) sugar.

Answer is above

Hope this helps.

Answer:

A. 10.74 KJ

B. 83.92 KJ

Explanation:

A. Data obtained from the question include the following:

Mass (m) of ethanol = 100g

Heat of fusion, Hfus = 4.94 kJ/mol

Heat (Q) =..?

Next, we shall determine the number of mole in 100g of ethanol, C2H5OH. This is illustrated below:

Mass of C2H5OH = 100g

Molar mass of C2H5OH = (2x12)+ (5x1) + 16 + 1 = 46g/mol

Number of mole (n) of C2H5OH =..?

Mole = Mass /Molar Mass

Number of mole (n) of C2H5OH = 100/46 = 2.174 moles.

Now, we can obtain the heat required to melt the ethanol as follow:

Q = n x Hfus

Q = 2.174 mol x 4.94 kJ/mol

Q = 10.74KJ

Therefore, 10.74 KJ of heat is required to melt the ethanol.

B. Data obtained from the question include the following:

Mass of C2H5OH = 100g

Heat of vaporisation, Hvap = 38.6 kJ/mol

Heat (Q) =..?

As calculated above, the number of mole in 100g of ethanol, C2H5OH is 2.174 moles.

The heat required to vaporise the ethanol can be obtained as follow:

Q = n x Hvap

Q = 2.174 mol x 38.6 kJ/mol

Q = 83.92 KJ

Therefore, 83.92 KJ of heat is required to vaporise the ethanol.

C. From the above calculations, a higher amount of heat energy i.e 83.92 KJ is required to vaporise the ethanol and a lesser amount of heat energy i.e 10.74 KJ is needed to melt the ethanol.

The heat required for the following two processes are:

a. 10.74 KJ

b. 83.92 KJ

Part a)

Given:

Mass (m) of ethanol = 100g

Heat of fusion, Hfus = 4.94 kJ/mol

To find:

Heat (Q) =?

Mass of C₂H₅OH = 100g

Molar mass of C₂H₅OH = (2x12)+ (5x1) + 16 + 1 = 46g/mol

Number of Mole = Mass /Molar Mass

Number of mole (n) of C₂H₅OH = 100/46 = 2.174 moles.

Calculation for Heat of fusion:

Q = n x Hfus

Q = 2.174 mol x 4.94 kJ/mol

Q = 10.74KJ

Therefore, 10.74 KJ of heat is required to melt the ethanol.

Part b)

Given:

Mass of C₂H₅OH = 100g

Heat of vaporization, Hvap = 38.6 kJ/mol

To find:

Heat (Q) =?

Calculation for Heat of vaporization:

As calculated above, the number of mole in 100g of ethanol, C₂H₅OH is 2.174 moles.

The heat required to vaporize the ethanol can be obtained as follow:

Q = n x Hvap

Q = 2.174 mol x 38.6 kJ/mol

Q = 83.92 KJ

Therefore, 83.92 KJ of heat is required to vaporize the ethanol.

Find  more information about Heat of fusion here:

brainly.com/question/87248

Answer:

Yes! That is trueeee

I hope this helps!!!

Answer:

1. 0.33 2. 0.1 7

Explanation:

Answer:

When the kinetic energy of particles in liquid increases, the particles are pushed farther apart. This can result in the expansion of matter. More pressure will be exerted on the container in which this liquid is stored.

HOPE THIS ANSWER IS HELPFUL!!

Answer:

Larger atoms tend to be more polarizable than smaller ones because their outer electrons are less tightly bound and are therefore more easily perturbed. Hydrogen bonds are especially strong dipole–dipole interactions between molecules that have hydrogen bonded to a highly electronegative atom, such as O, N, or F.

Explanation:

Answer:

you are right

Explanation:

and i do not need to explain it because you did

Answer:

Carbon

Explanation:

Answer:

carbono

Explanati  

Answer:

210 82Pb-----> 206 80Hg + 4 2 He

55 24 Cr----->55 25 Mn + 0 -1 e

76 35 Br + 0 -1 e-----> 76 34 Se

Explanation:

Alpha decay occurs with atoms having high atomic number number. As the atomic number increases, the repulsions between the protons make the nucleus unstable. A point is reached where the attractive forces in the nucleus are unable to hold the nucleons together anymore. Part of the nucleus now breaks off as an alpha particle or a helium nucleus.

Beta decay involves the transformation of a neutron to a proton, electron and neutrino. It decreases the neutron-proton ratio.

The capture of an orbital electron converts a proton into a neutron with the emission of a neutrino. The atomic number of the product nucleus decreases. Orbital electron capture increases the neutron-proton ratio.

Answer:

Explanation:

1 mole = 6.02x10^23

32.3x10^24/6.02x10^23= 53.65449 moles

53.65449 moles

Most teachers force you to worry about significant figures

53.65 moles

Answer:

The awnser is b

Explanation:

The sound waves get smaller as the sound moves farther away, and since the sound waves are smaller, the sound is quieter. This is known as the Doppler effect.

Answer:

Formed by adding 5 g of sugar to 1 L of water

Explanation:

The substance formed by adding 5 g of suagr to 1 L of water is a mixture.

A mixture is defined as two or more substances that are physically mixed but do not react together. It thus means that the component substances of a mixture can be retrieved through appropriate means of separations.

A mixture of sugar and water can be separated by evaporation. The mixture is heated and the vapor from the boiling water can be condensed to retrieve the water while the residue will give the sugar that was initially dissolved in it.

The products formed from other descriptions in the illustration cannot be separated ordinarily and thus, are not considered to be mixture. The components have been chemically combined together.

Answer: The highest difference is in between N and H thus this will have greatest polarity.

Explanation:More the electro-negativity between any two elements more the polarity in the bond. Electron negativity is the tendency to pull shared pair of electrons towards it self. If the difference between two bonded elements is way too high then it may result in complete transfer of electrons from the less electronegative element to more electronegative one. Thus the bond will be ionic and highly polar.

Among given options,the electro negativity differences are:

A) Al-Si : 1.9-1.61=  0.29

B) S-Cl : 3.16- 2.58 = 0.58

C) N-H : 3.04 - 2.2 = 0.84

D) C-N : 3.04-2.55 = 0.49

The highest difference is in between N and H thus this will have greatest polarity.

Answer:

1 mile = 1,609 meters

3.02E6 mi^2 x (1609^2m^2/mi^2) = 7.818E12 m^2

1 in= 2.54 cm => 2 in = 5.08cm = .0508m

7.818E12 m^2 x .0508m = 3.97E11 m^3

1 cubic meter = 1,000,000 cubic centimeters

3.97E11 m^3 x (1,000,000 cm^3 / m^3) = 3.97E17 cm^3

1000 cm^3 = 1L

3.97E17 cm^3 x (1L / 1000cm^3) = 3.97E14 L  

or 3.97 x 10^14 L

convert to grams since 1L is 1000g

(3.97x10^14) x1000g which is 3.974x10^ 17g which is the final ans

Explanation:

The water that can be held is 3.974x10¹⁷g

The measures given should be first given to the units in the metric system. In this way, the mile will be converted to meters. Then,

Here,

1 mile = 1,609 meters

So,

3.02 m² x (1609m²/m²) = 7.818E12 m²

According to the metric system, inches will also be converted to meters. So

1 in= 2.54 cm

=> 2 in = 5.08cm = .0508m

Now, Equating these equations,

7.818 m² x .0508m = 3.97 m³

We know that

1 cubic meter = 1,000,000 cubic centimeters

According to that,

3.97 m³ x (1,000,000 cm³ / m³) = 3.97 cm³

Also, we know that,

1000 cm³ = 1L

3.97 cm³ x (1L / 1000cm³) = 3.97 x 10¹⁴ L

Now, converting this value to grams as 1L is 1000g

(3.97x10¹⁴) x1000g = 3.974x10¹⁷g.

Therefore, 3.974x10¹⁷g is the final answer.

Read more about mass calculations, here

https://brainly.com/question/15743584

#SPJ2

Answer:

250,000 ants are in each colony or ant hill.

Explanation:

hope this helps!

Answer:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction

Explanation:

When we increase the temperature of one of the reactants in a chemical reaction, this increases the particles kinetic energy, making them move much faster than they were before. This also increases the chance of a more successful collision and the rate of reaction.

Answer:

see below

Explanation:

1) Since PST is 3 hours behind EST it will be 3:30 - 3 = 12:30 pm PST.

2) Oregon is in PST and NY is in EST so it'll be 10 - 3 = 7 pm in Oregon.

3) Ohio is in EST and Chance is in CST so it'll be 9 + 1 = 10 am in Ohio.

Answer:

Neutral

Explanation:

1 Mole OH-  = Hard Base

1 mole H3O+ = Hard Acid

2 H2O(l) ⇆ H3O+ (aq) + OH- (aq)

HSAB

Soft acids react fastest and form the strongest bonds with soft bases

Hard acids react fastest and form the strongest bonds with Hard bases

Resulting solution is definitely not non-polar as the result is H2O which is polar.

Acid:  A solution that has an excess of H+ ions

Base: A solution that has an excess of OH- ions.

H2O is neutral because the concentration of hydrogen and hydroxide ions is the same.

Answer:

Blue litmus paper paper turns red under acidic conditions. Red litmus paper turns blue under basic or alkaline conditions. If you're using a universal indicator, the weak base should turn those blue.

Explanation:

Answer:

Nickel has an atomic number of 28,so it has 28 electrons

Nickel has 10 valence electrons

Answer: 16

Explanation:

Answer:

Since the formula of the functional group is not given in the question, here are possible answers; If it is;

1. -COOH or -CO2H, it is an organic acid

2. -COOR, it is an ester

3. RC=O, it is a ketone

4. HC=O, it is an aldehyde

Note: Check the attachment below

Explanation:

The functional group of an organic compound is a specific group of atoms or bonds within a compound that is responsible for the characteristic chemical reactions of that compound.

The most common functional groups are:

Carbonyls (C=O); which includes the aldehydes, HC=O, and ketones, RC=O

Alcohols (-OH),

Carboxylic (organic) acids (COOH),

Edters (COOR), and

Amines (NH2).

The different organic functional groups have their unique chemical formula.

The various organic functional groups and their chemical formulas are as follows:

Organic acids - (-CO2H)

Alcohols - (-OH)

Esters - (CO2R)

Ketones - (R2C=O)

Aldehyde - ( C=O)

More on functional groups can be found here: https://brainly.com/question/14618322

Answer:

6 CH2O which is C₆H₁₂O₆

Explanation:

The empirical formula for glucose is CH2). The molar mass of glucose is 180.2 grams per mole. Determine the molecular formula of glucose.

Formula: C₆H₁₂O₆

Empirical Formula is CH2O

Molecular Molar Mass is 180.20g/mole

Empirical Molar Mass is 30.02 g/mole

molecular formula of glucose is C₆H₁₂O₆

n = 180.20/30.02=6

n×(CH2O)

where n = molecular molar mass / empirical molar mass

So we end up with 6 CH2O which is C₆H₁₂O₆

Answer:

Hello

Coefficients are 1,3,2,1

Explanation

Answer:

Light

Explanation:

All  of  the  other  conditions  are  the  same.  As  an  example  the  amount  of  water  which  sally  apply  to  each  plant  is  the  same.  So  the  independent

 variable  that  she  is  experiment  on  is  the  effects  of  different  kinda  lights  on  the  growth  of  the  bean  plants

The source of light is the independent variable in the experiment of how the type of light affects the height of bean plants.

The independent variable is the variable that cannot be influenced or disturbed by the effect of the other factors or the characteristics of another thing present in the system.

In the experiment on how the type of light affects the height of bean plants, the light source LED, incandescent, and CFL have their own characteristics and cannot be affected by anything in the environment.

Therefore, in the experiment on how the type of light affects the height of bean plants, the source of light is the independent variable.

Learn more about independent variables, here:

https://brainly.com/question/1479694

#SPJ2

Answer:

this one  earth is less than the gravitational strength on Neptune

Explanation:

Answer:

a. C₈H₁₄N₂O₂ = 107.209 g/mol

b. Approximately 1.4 × 10⁻⁴ moles

c. 8.423 × 10¹⁹ molecules

d. 1.685 × 10²⁰ atoms of oxygen

e. 1.685 × 10²⁰ atoms of nitrogen

Explanation:

The chemical formula is found as follows;

X×12 + 14×1 + 14×2 + 16×2 = 170.209

Where:

X = Number of carbon atoms per mole of C&H₁₄N₂O₂

Therefore;

X × 12 = 170.209 - 74 = 96.209

X = 96.209/12 = 8.017 ≈ 8

The chemical formula is C₈H₁₄N₂O₂

b. The number of moles, n, is found as follows;

[tex]n = \dfrac{Mass \ of \ sample}{Molar \ mass \ of \ the \ sample} = \dfrac{15 \times \dfrac{1}{1000} }{107.209} = 1.4 \times 10^{-4} \ moles[/tex]

c. The number of molecules, N, is given by the following relation;

N = [tex]N_A[/tex] × n

Where:

[tex]N_A[/tex] = Avogadro's number = 6.02 × 10²³ molecules

∴ N = 6.02 × 10²³ × 1.4 × 10⁻⁴ = 8.423 × 10¹⁹ molecules

d. The number of oxygen atom per molecule of C₈H₁₄N₂O₂ = 2 oxygen atoms

The number molecules of C₈H₁₄N₂O₂ in 15 mg of C₈H₁₄N₂O₂ = 8.423 × 10¹⁹ molecules

Therefore;

The number of oxygen atom per 15 mg of C₈H₁₄N₂O₂ = 2 × 8.423 × 10¹⁹  oxygen atoms

The number of oxygen atom per 15 mg of C₈H₁₄N₂O₂  = 1.685 × 10²⁰ atoms of oxygen

e. The number of nitrogen atoms are equal to the number of oxygen atoms per molecule of C₈H₁₄N₂O₂, therefore;

The number of nitrogen atoms = 1.685 × 10²⁰ atoms of nitrogen.