PLZZZ help asaap plz its 50 points plzzzz Calculate for the formula mass (for ionic compounds) and molecular mass (for covalent compounds):
Mg3 (AlO3)2



(NH4)2 C2O4




Al 4 ( Fe (CN)6)3

I think it's C. commensalism

Answer:

COMMENSALISM IS CORRECT

Explanation:

Answer:

It forms from two hydrogen atoms, each with one electron in a 1s orbital. Both hydrogen atoms share the two electrons in the covalent bond, and each acquires a helium-like electron configuration.

Answer:

17 kJ

Explanation:

Calculation for the Calculate the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C.

Using this formula

q = mC∆T

Where,

q represent Energy

m represent Mass of substance=0.60kg=600g

C represent Specific heat capacity=2.44J·g−1K−1.

∆T represent change in Temperature=2.2°C to 13.7°C.

Let plug in the formula

q=(0.60 kg x 1000 g/kg)(2.44 J/gº)(13.7°C-2.2°C)

q = (600g)(2.44 J/gº)(11.5º)

q=16.836 kJ

q= 17 kJ (Approximately)

Therefore the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C will be 17 kJ

Answer:

Answer is c.

Explanation:

when you mix sugar with water,the sugar dissolves to make a transparent solution.

I hope it's helpful!

Answer:

Around.

Explanation:

A chemical formula helps scientists to show or illustrate the type and number of atoms present in a particular molecule or compound by using numerical subscript, ions and atomic symbol of a chemical element.

This ultimately implies that, a chemical formula is used to describe or denote the exact amount of atoms that make up a molecule or compound.

The type of bond which is formed when the atoms of a chemical element are sharing electrons is known as covalent bond. Thus, when two (2) atoms of a chemical element comes close together, the nucleus of one of the atom attracts the other atom's electrons.

However, before bonding takes place, the atom's electrons spend most of their time around the nuclei of each atom.

Answer:

1 gram of the substance

Explanation:

You have to put grams in the denominator, so they cancel out and leave you with moles

Answer: ADF

Explanation: On my moms it’s right

The statements describe how heat flows in foil are heat flows in all directions, Heat flows from the cooler atoms to the warmer atoms, Heat flows from the warmer atoms to the cooler atoms. Therefore, option A, D and E are correct.

Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred.

Due to its extraordinary thinness and shine, aluminum foil has special characteristics. It bounces heat waves back outward rather than effectively absorbing or conducting heat. This explains why aluminum foil cools almost instantly after being removed from the oven, even after it has been there for some time.

The majority of the radiation released by a heated object is reflected onto the object when it is wrapped in reflective aluminum foil.

Thus, option A, D and E are correct.

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Answer:

HCl + NH₃ → NH₄⁺ + Cl⁻

Explanation:

When a strong acid as HCl reacts with a weak base as NH₃ a salt that comes from the conjugate acid, NH₄⁺, and the ion of the acid, Cl⁻, is produced as follows:

This is the acid- base reaction

The base captures the proton of the acid (proton aceptor) and the acid give the proton (Proton donor)

Answer:

77.9 g

explanation:

Answer: 77.9 g

Explanation:

Answer:

Follows are the solution to this question:

Explanation:

Please find the complete question in the attachment file.

In option a)

In the periodic group of [tex]3s^2 \ 3p^1[/tex] main group component to valence electronic structure (IIIA group) and Aluminum (Al). The monatomic ion forms a load of (+3)

In option b)

The Chlorine within the periodic group (VIIA group) is the main group element for valence electron configuration [tex]3s^2\ 3p^5[/tex] (Cl). It constitutes a monatomic ion with a load of (-1).

Electron configuration is the arrangement and distribution of electrons of an atom in an atomic orbital or of a molecule in a  molecular orbital.

They are arranged according to the energy levels known as 1, 2, 3, 4, 5, and in the shells namely K, L, M, N.

1.The correct answers for the blank  are:

In the periodic group III A the element with electronic configuration

                                                 [tex]3s^{2} 3p^1[/tex]

is aluminium  (Al)  and the monatomic ion formed will be +3 charge.

2. The correct answers for the blank  are:

Chlorine (Cl)  is the main group element with electronic configuration of

                                              [tex]4s^{2} 4p^5[/tex]

and the charge of the monatomic ion is -1.

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Answer:

d. The sisters played against each other in tennis, but they did it without spite.

Explanation:

Answer:

The sisters played against each other in tennis, but they did it without spite

Explanation:

Answer:

MgBr2 > KBr > C3H7COOH > C6H12O6

Explanation:

A strong electrolyte is a solution that dissociate completely in solution. A weak electrolyte does not dissociate completely in solution. The more the number of particles in solution, the more the conductivity of the solution.

For the substances Lister in the question;

MgBr2(aq) ------> Mg^2+(aq) + 2Br^-(aq)

KBr(aq) -----> K^+(aq) + Cl^-(aq)

C3H7COOH(aq) ------->C3H7COO^-(aq) + H^+(aq) (poorly dissociates)

C6H12O6 does not dissociate because it is molecular

Answer: Gravity will pull two objects toward each other

Explanation:

Answer:C

Explanation:Gravity

Answer:

[tex]Dietary\ Calories=65.6kcal[/tex]

Explanation:

Hello!

In this case, since we can see that the heat released by the combustion of the mayonnaise is absorbed by the bomb calorimeter and water, we can set up the following equation:

[tex]m_{mayonnaise}q_{mayonnaise}=C\Delta T[/tex]

Whereas q for mayonnaise stands for the heat due to its usage; thus, we plug in to obtain:

[tex]q_{mayonnaise}=\frac{5.20kJ/\°C*2.93\°C}{0.555g} \\\\q_{mayonnaise}=27.45\frac{kJ}{g}[/tex]

Now, if 10.0 g are eaten, the energy provided by it turns out:

[tex]E_{mayonnaise}=27.45kJ/g*10.0g\\\\E_{mayonnaise}=274.5kJ[/tex]

And we need that value in dietary calories, 1 kcal:

[tex]Dietary\ Calories=274.52kJ*\frac{1kcal}{4.184kJ}\\\\ Dietary\ Calories=65.6kcal[/tex]

Best regards!

Answer:

Chemical reaction often involved changes energy due to the breaking and formation of bonds. Reaction in which energy is released are exothermic reaction,while those that take in heat energy are endothermic.

Answer: 3 molecules of carbon dioxide and 4 molecules of water are produced during the combustion of propane.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical reaction for combustion of propane is:

[tex]C_3H_8+5O_2\rightarrow 3CO_2+4H_2O[/tex]

3 molecules of carbon dioxide and 4 molecules of water are produced during the combustion of propane.

The final temperature : 317 °C

Given

V₁=2.5 L

V₂ = 5 L

T₁ = 22 + 273 = 295 K

Required

The temperature, T₂

Solution

Charles's Law  

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

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

Input the value :

T₂ = (T₁ x V₂) : V₁

T₂ = (295 x 5) : 2.5

T₂ = 590 K = 317 °C

I hope I'm not late, but it's "Cooler air over land moves toward the water, where it is warmed by radiation.​"

Answer:

It takes millions of years to form,

Compressing on the ocean floor.

Then one day they come to shore

and sediments they are no more.

They can sometimes tell of life before

with layers, fossils and much more! this is the rock formation

it's not a decoration .

Explanation:

The number of atoms : 33

Given

The chemical formula: 3Mg(OH₄)₂

Required

The number of atoms

Solution

The chemical formula of a compound shows the mole ratio and the number of each of its constituent components (number of atoms)

Usually, the ratio of the elements in a compound is indicated by their subscript number after the monoatomic or polyatomic in the compound

While the coefficient in front of the compound indicates the number of molecules

In the chemical formula 3Mg (OH₄) ₂, there are 3 molecules of Mg (OH₄) ₂, so the number of atoms of the elements:

Mg = 3

O = 3 x 2 = 6

H = 3 x 4 x 2 = 24

Total atoms = 3 + 6 + 24 = 33

Answer:

Na (sodium)

Explanation:

An atom, which is the smallest indivisible particle of an element, contains three sub-atomic particles namely: proton, electron, and neutron. An atom is said to be neutrally charged if it contains a charge 0.

In a neutral atom, the number of electrons and the number of protons in an element are equal. These numbers are called the ATOMIC NUMBER. That is, in a neutral atom;

proton no. = electron no. = Atomic no.

Hence, in this case where Silicon atom has an electron number of 14. If three of this electrons are removed, there will be 11 electrons left, hence, this atom becomes SODIUM element, which has 11 electrons in its atom, with chemical symbol Na.

Answer:

it is

Explanation:

i think all you have to do is add mint oil to boiling hot water and you get mint tea i guess

Explanation:

In a covalent bond the electrons are simultaneously attracted by the two atomic nuclei.

In a covalent bond the electrons are; simultaneously attracted by the two atomic nuclei.

Covalent bonding can be defined as the sharing of electrons between two atoms.

The Polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.

We know that

Polar covalent bond is defined as a chemical bond in which electrons are shared unequally or unevenly between two atoms.

Non-polar covalent bond is defined as a chemical bond in which electrons are shared evenly or equally between two atoms.

Therefore, In a covalent bond the electrons are; simultaneously attracted by the two atomic nuclei.

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Answer:

false

Explanation:

The genotype of 50% of offspring will be Gg, 25% will be gg, and 25% will be GG. Hence, it is true.

An organism's genotype is made up of all of its genetic components. The alleles or variations that an individual carries in a specific gene or genetic region are also referred to as the genotype. In other words, it is the genetic makeup of an organism. Phenotypes are determined by genotypes.

There are three different genotype types: homozygous dominant (PP), homozygous recessive (PP), and heterozygous (Pp). Examples of genotypes are hair color, skin color, height, hair texture, and blood group.

When two parents who are both Gg (Bb) for a gene are crossed, then the genotype of their offspring will be GG, gg, Gg. Hence, it is true.

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Answer:

a penny that has turned green

Explanation:

a chemical change is when a substance combines with another to form a new substance. the other answer choices doesn't form a new substance.

Answer:

Q = 214.005 J

Explanation:

Given that,

Mass, m = 2.5 g

The hydrogen gas is heated from 17.0°C to 23.0°C.

The specific heat capacity of hydrogen is 14.267 J/g C.

We need to find how much energy is absorbed.

The formula for the energy absorbed is given by :

[tex]Q=mc\Delta T\\\\Q=2.5\times 14.267 \times (23-17)\\\\Q=214.005\ J[/tex]

So, the required energy is 214.005 J.

Answer: The empirical formula is [tex]C_3H_6O[/tex]

Explanation:

If percentage are given then we are taking total mass is 100 grams. So, the mass of each element is equal to the percentage given.

Mass of C = 62.04 g

Mass of H = 10.43

Mass of O = (100-(62.04+10.43)) g  = 27.53 g

Step 1 : convert given masses into moles.

Moles of C = [tex]\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{62.04g}{12g/mole}=5.17[/tex]moles

Moles of H =[tex]\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{10.43g}{1g/mole}=10.43moles[/tex]

Moles of O = [tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{27.53g}{16g/mole}=1.72moles[/tex]

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C = [tex]\frac{5.17}{1.72}=3[/tex]

For H =  [tex]\frac{10.43}{1.72}=6[/tex]

For O =[tex]\frac{1.72}{1.72}=1[/tex]

The ratio of C :H :  O= 3: 6 : 1

Hence the empirical formula is [tex]C_3H_6O[/tex]