if anyone can answer this that will be amazing !!

Answer:

B.) The sun is closer to Earth than any other star.

Answer:

Carbon monoxide, and water vapor was analyzed and found to contain 4.5 mol of carbon dioxide, 4.0 mol of carbon monoxide and 1.5 mole of water vapor. ... An ideal gas sample weighing 0.548 g at 100°C and 0.993 atm has a volume of 0.237 ... VSEPR predicts that an IF5 molecule

Explanation:

The volume of the nitroglycerin exploded can be calculated using the ideal gas equation. Here, the number of moles of water vapor formed is 10.5 moles. Then, the volume is 43807 L.

Ideal gas equation connects the pressure, temperature and volume of a gas with its number of moles as written in the expression below:

PV = nRT.

where R = 0.082 L atm /K mol

One mole of nitroglycerin produces 10 moles of water. Then,  239 g or 1.05 moles produces 10.5 moles of water vapor.

Given,

P = 45 mmHg = 0.05 atm

T = 2678°C = 2951 K

n = 10.5

The volume of water vapor is calculated as follows:

V = nRT/P

   = (10.5 mol × 0.082 L atm/K mol ×2951 K)/0.05 atm

   =  43807 L.

Therefore, the volume of water vapor produced is 43807 L.

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Answer:

CH3COOH would be more concentrated

Explanation:

The higher the concentration value, the more concentrated it is.

The relationship between concentration, moles and volume is given by the equation;

Concentration = No of moles / Volume

5.0 grams of HCOOH dissolved in 189 mL of water

Number of moles = Mass / Molar mass = 5 / 46.03 = 0.1086 mol

Concentration = 0.1086 / 0.189 = 0.5746 mol/L

1.5 moles of CH3COOH dissolved in twice as much water

Volume = 2 * 189 = 378 ml = 0.378 L

Concentration = 1.5 / 0.378 = 3.9683 mol/L

Comparing both concentration values;

CH3COOH would be more concentrated

Answer:

the answer is D

Explanation:

Air over the beach heats up, rises, and is replaced by cool, denser ocean air

The ocean heats up much slower and becomes relatively cooler than the beach making it a high pressure zone. The air moves from the water to the land each morning forming a sea breeze. These pressure zones might equal out later in the day and the winds may diminish. ... A sea breeze blows from the ocean towards the beach.

Answer:

104 g

Explanation:

i just solved it

Answer:

Reactants

Explanation:

They become known as reactants

Answer:

In humans, up to ten different proteins can be traced to a single gene. Proteome: It is now estimated that the human body contains between 80,000 and 400,000 proteins. However, they aren't all produced by all the body's cells at any given time. Cells have different proteomes depending on their cell type.

Explanation:

Proteins are macromolecules that are complex structures made of monomeric units. There are 20,000 - 60,000 different kinds of proteins in the human body.

Proteins have been the large molecules (macromolecules) that are structurally composed of the monomers or the smaller units. They have been composed of amino acids.

The amino acids are produced by the translational process and are linked by the peptide bonds. They are the most essential compound for the cellular and physical activity of the cells in living organisms.

The proteome is used to identify and classify the various proteins that can range from 20,000 - 60,000 in a human body. These proteins are involved in performing the functions in the body.

Therefore, approximately 20,000 - 60,000 proteins are found in the human body.

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Answer:

2 hard working men fix water spout for the community

AMSWER:

B. I'm sorry if this is wrong

Explanation:

The amount of chlorine will be 0.791 gram required to completely react with 0.0223 moles of sodium iodide .

The given chemical reaction is :

2Nal + [tex]Cl_{2}[/tex] → 2NaCl + [tex]I_{2}[/tex]

It is given that:

Amount of sodium iodide = 0.0223 mol.

Atomic mass of chlorine = 35.45 g.

The amount of chlorine can be calculated as:

0.0223mol. NaI × (1mol. Cl₂/2mol. NaI) × (35.45g/1mol. Cl2)

=0.791 grams

Therefore, the correct answer will be option (D).

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Answer:

first answer

Explanation:

Answer:

It would tend to gain one electron and form a -1 ion. Aluminum is in the fifth column and therefore has 5 electrons in its outermost shell. It would tend to lose three electrons and form a +3 ion.

Explanation:

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Aluminum (Al) is an element with atomic number 13, which means it has 13 protons and 13 electrons in its neutral state.

When forming an ion, aluminum tends to lose three electrons. This is because aluminum belongs to Group 13 in the periodic table, also known as the "boron group" or "Group IIIA."

Elements in this group have three valence electrons in their outermost energy level. To achieve a stable electron configuration, aluminum can lose these three valence electrons, leaving behind a complete inner electron shell and forming a 3+ cation.

So, when aluminum forms an ion, it loses three electrons to become Al3+.

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Answer:

The mass of water produced is 4.29 g.

Explanation:

Given;

reacting mass of ethane, C₂H₆ = 2.5 g

reacting mass of oxygen, O₂ = 5.0 g

The balanced combustion reaction is given as follows;

2C₂H₆   +   7O₂ ---------------->  4CO₂    +   6H₂O

Based on the balanced equation above;

                                     requires

7.0 moles of oxygen ----------------------->   2.0 moles of ethane

                                   requires

5.0 g of oxygen      -------------------------->  x gram of ethane

x = (2 x 5) / 7

x = 1.43 g

Ethane is in excess of 1.07g (2.5 g - 1.43g)

Now, determine the mass of water produced by 1.43 g of ethane;

                                   requires

2.0 moles of ethane ----------------------->   6.0 moles of water

                                   requires

1.43 g of ethane      -------------------------->  y  gram of water

y = (6 x 1.43) / 2

y = 4.29 g

Therefore, the mass of water produced is 4.29 g.

Answer:

c

Explanation:

Answer:

Acid-base indicators are generally weak proteolytic that change color in solution according to the pH. The acid-base equilibrium of a weak acid type of indicator (HI) in water can be represented as. [I] The acid, HI, and the conjugate base, I−, have different colors. The equilibrium expression for this process is.

Answer:

57 mL

Explanation:

To make things clear, when 769 mL of ethanol were mixed with 507 mL of water, the resulting volume was not (769+507) 1276 mL, but a lower value. This is because of the interactions between liquid molecules.

First we calculate how many grams of ethanol are there in 769 mL, using the given density:

Then we convert 606.97 g of ethanol into moles, using its molar mass:

Now we calculate the actual volume of the solution, using the definition of molarity:

Finally we convert 1.219 L to mL, and calculate the difference in volume:

Answer:

A

Explanation:

Answer:

The pressure in atm is 6.04 x 10^-3

Explanation:

Pressure of the gas is defined as the force exerted by the particles on the walls of the container. It is expressed in various terms like 'mmHg', 'atm', 'kiloPascals' etc..

All these units of pressure are inter convertible.

Pressure of the gas = 4.59 mm Hg

760 mm Hg = 1 atm

4.59 mm Hg= 1/760 x 4.59 = 6.04 x 10^-3atm

The pressure in atm is 6.04 x 10^-3

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Answer:

Sulfur tetra fluoride

Explanation:

Answer: FeCl3+O2-->Fe2O3+Cl2  is NOT balanced

Explanation:You first need to balance the equation.  The balanced equation would be...

4FeCl3 + 3O2 ==> 2Fe2O3 + 6Cl2

moles FeCl3 present =4 moles

moles O2 present = 4 moles

Since the mole ration in the balanced equation is 4 FeCl3 : 3 O2, the limiting reactant will be FeCl3

moles Cl2 that can be produced = 4 moles FeCl3 x 6Cl2/4 moles FeCl3 = 6 moles Cl2

Answer:

what am i loooking at

Explanation:

Answer: 4.48L of CH4 at STP is equal to 1.2×10^23 molecules

Explanation:

Answer:

5moles

Explanation:

number of moles=mass/molar mass

The molar mass of water is 18.0 g/mol. A mass of 90.0 grams of water is equivalent to 5 moles. Therefore, option B is correct.

The mass in grams of one mole of a substance is defined as its molar mass. Molar mass is measured in grams per mole, abbreviated as g/mol. The isotopic atomic mass of a single isotope of any given element is a value that compares the mass of that isotope to the mass of the isotope carbon-12.

A compound's molar mass can be calculated by adding the standard atomic masses (in g/mol) of its constituent atoms.

A compound's molar mass indicates the mass of one mole of that substance. In other words, it tells you how many grams of a compound there are per mole. As a result, the units for molar mass are grams/mole.

number of moles = mass / molar mas

=  90.0 grams /  18.0grams

= 5 moles

Thus, option B is correct.

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Answer:

14

Explanation:

Mass number is just the value of the protons and neutrons added, in this case its 14

Answer:

4.26m

Explanation:

Molality , m, is an unit of concentration in chemistry defined as the ratio between moles of solute (In this case, NaCl) and kg of solvent (In this case, water).

To solve the question we need to find the moles of NaCl and the mass of water in kg:

Moles NaCl -Molar mass: 58.44g/mol-:

11.7g * (1mol / 58.44g) = 0.200 moles

Mass of Water in kg:

47g * (1kg / 1000g) = 0.047kg

Molality is:

0.200 moles / 0.047kg =

4.26m

Answer:

I don't know sorry

Explanation:

ask tutor

Answer:

an agent that helps accept electrons on others like oxygen, halogens

Explanation:

a substance that tends to bring about oxidation by being reduced and gaining electrons.

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