Rank the ions in each set in order of increasing size, and explain your ranking:
(c) O²⁻, F⁻, N³⁻

Answer:

B. Lindsay measures the sizes of the craters on the moon

Answer:

I think it's D but it's my (viewpoint)

Answer:

6FCRXCTV

Explanation:

Answer:

b

Explanation:

a p e x

When inserting glass tubing into a stopper, it is important to protect your hands and eyes to prevent injury.

Some general guidelines to follow: Wear gloves to protect your hands from sharp edges and potential exposure to hazardous materials. Consider using cut-resistant gloves or heat-resistant gloves, depending on the nature of the material you are working with.

Eye protection is also essential to prevent injury from flying glass or other debris. Wear safety glasses or goggles to protect your eyes.

Use proper technique when inserting glass tubing into a stopper. Lubricate the stopper and the tubing with a small amount of water, glycerin, or silicone grease to make the insertion easier and to reduce the risk of breakage.

Do not force the glass tubing into the stopper. Apply gentle, even pressure and twist the tubing slightly as you insert it into the stopper.

After insertion, check the glass tubing and the stopper for any signs of damage or stress. If there are any cracks, chips, or other damage, discard the glassware and start over with a new piece.

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In the reaction, NH4HS(s)⇌NH3(g)+H2S(g), more of the solid will form.

In a chemical reaction, equilibrium is the state where both the reactants and products are present in concentrations which have no further tendency to change with time, so there is also no observable change in the properties of the system. This state results when forward reaction proceeds at the same rate as reverse reaction.

If Q= K then equilibrium

Q>k, then reversed direction shift

Q<k, then forward direction shift

Given, Kc=8.5×10−3

Given [NH3]=0.166  and M [H2S]=0.166 M

Here Q= 0.166 M (given)

It shows Q> k that is 0.166 > 8.5×10−3

Therefore, more of the solid will form.

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Answer:

doesn’t make sense coffee couldn’t make you shorter , yes it might stop you from growing but it doesn’t shrink your body.

Explanation:

Because coffee is made out if coffee beans and has caffeine but theres just no possible way that’s even a question.

The formula of water is H2O

Explanation:

The water molecule consists of two hydrogen atoms and one oxygen atom. So the chemical molecula formula of water is H2O where H is the symbol of hydrogen and O is the symbol of oxygen and 2 indicates that there are two atoms of hydrogen.

Hope this helps you!

Acetic acid and sodium hydroxide used to make a buffer solution.

What is buffer solution?

buffer solution is a waterproof solvent based solution in  which consists of a mixture of  containing a weak acid and  the conjugate base of the weak acid, or a weak base of the solution and the conjugate acid of the weak base. They resist to a  change in pH upon to the  dilution or upon the addition of small amounts of a  acid/alkali to them.

buffer solution resist of a  change in pH when smallest amounts of a stronger acid or a stronger base are added.

Sol-acetic acid is a weaker acid and  its conjugate base is the acetate anion. That's why the addition of the  strong base, hydroxide, which neutralized half of a  acetic acid created a buffer and solution because we are having  significant amounts of both acetic acid and its conjugate base, the acetate anion, in the solution.

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Answer:

-1670.24 kJ

QUICK Explanation:

ΔH * moles of limiting reactant  = Energy produced

-572 kJ/mol * 2.92 moles of O2 = -1670.24 kJ

LONGER EXPLANATION :

2 H2 + O2 -> 2 H2O

ΔH * moles of limiting reactant  = Energy produced

enthalpy change or heat of reaction formula

1. Calculate the number of moles of oxygen (O2):

  Number of moles = mass / molar mass

  Number of moles of O2 = 93.5 g / 32.00 g/mol

                      ≈ 2.92 mol O2

2. Calculate the number of moles of hydrogen (H2):

  Number of moles = mass / molar mass

  Number of moles of H2 = 13.2 g / 2.02 g/mol

                      ≈ 6.53 mol H2

3. Determine the limiting reactant:

  According to the balanced equation,

  2 moles of H2 react with 1 mole of O2.

  Calculate the moles of O2 based on the moles of H2:

  (6.53 mol H2) / (2 mol H2/O2) = 3.27 mol O2

we need 3.27 mol O2  to react with the available H2

BUT only have 2.92 mol of O2 available

O2 is the limiting reactant

4.

Calculate the heat given off by assuming the complete consumption of the limiting reagent

calculate the amount of energy produced using the given enthalpy change (ΔH):

Energy produced = ΔH * moles of limiting reactant

Energy produced = ΔH * moles of O2 reacted

Calculate the energy produced using the given enthalpy change (ΔH):

  Energy produced = ΔH * moles of O2 reacted

                 = -572 kJ/mol * 2.92 mol

                 ≈ -1670.24 kJ

Therefore, approximately -1670.24 kJ of energy is produced when 93.5 grams of oxygen react with 13.2 grams of hydrogen in the given reaction. Note that the negative sign indicates that the reaction is exothermic (energy is released).

chatgpt

Answer:

4

Explanation:

Answer:

a) 74842.7 g

b) 0.1201 m

Explanation:

1 pound is 453.592 g  

165 pound = 74842.7 g

12.01 / 100 = 0.1201 m

Answer:

Explanation:

please mark as brain and like please

The percent composition depicts the percent of an individual element by mass. The percent composition by mass is determined by the ratio of individual mass to the molar mass of the whole compound.

Mass percent composition is defined as the ratio of the mass of an element in a mole to the molar mass of a compound and multiplied by 100. This allows knowing the mass of an element in a compound or a molecule to the rest of the compound.

First, the molar mass of the whole compound is calculated by adding the individual masses and then used in an equation to get divided by the individual mass of the involved element.

The mass percent composition is given as,

% by mass = mass of element / molar mass of compound × 100%

Therefore, the mass percent composition involves the mass of the individual elements and molar mass.

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Answer:

nucleic acids yw

Explanation:

Answer:

nucleic acids

Explanation:

edg

When the solvent molecules and the solute molecules mix this process is usually heat of solution. Option E is correct answer.

When the solvent molecules and the solute molecules mix, this process is known as heat of solution. It is the energy change that occurs when a solute dissolves in a solvent to form a solution. This process can either be exothermic or endothermic, depending on whether energy is released or absorbed during the process

In an exothermic process, the heat is released to the surroundings, while in an endothermic process, heat is absorbed from the surroundings. Heat of solution is an important concept in chemistry and is used to understand the behavior of solutes in different solvents. The answer is option E.

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Answer:

First one: group

Second one: period

Third one: number of valence electrons

Last one: increases

Answer:

D. lysosome

Explanation:

hope it helps :D

sorry if its wrong :/

SOMEONE ANSWER DA QUESTON

150.0 g of ice absorbs 49.97 kJ of heat as it melts at 0°C.

To calculate the amount of heat absorbed by 150.0 g of ice as it melts at 0°C, we need to use the heat of fusion of water, which is the amount of heat required to melt one mole of a substance at its melting point. For water, the heat of fusion is 6.01 kJ/mol.

The first step is to determine the number of moles of ice present in 150.0 g,

n = m/M

n = 150.0 g / 18.02 g/mol

n = 8.32 mol

Next, we can use the heat of fusion to calculate the amount of heat absorbed by the ice as it melts,

q = n x ΔHfus

q = 8.32 mol x 6.01 kJ/mol

q = 49.97 kJ

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Materials generally become warmer when they are "absorbed" by light, this statement is more detailed. So, the correct answer is "absorbed by them."

Explanation: When a material absorbs light, it receives energy from the light, which leads to an increase in temperature. When light is absorbed by a material, the energy of the light is transformed into internal energy in the material. The temperature of a material can increase as a result of this energy absorption.

This is due to the fact that the increased internal energy of the molecules in the material causes them to vibrate more quickly and hence results in a temperature rise.

The light reflects or transmits when it passes through the material. When light reflects off a surface, it bounces back in the opposite direction. Transmitted light travels through a material without being absorbed by it.

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Answer:

False

Explanation:

Mass number is the quantity of protons and neutrons within one atom while the atomic mass is the average mass of all isotopes of the element.

Answer:

false :)

Explanation:

Fibers are the unit of the textile that makes the woven clothes and consist of artificial or natural fibers. Nylon, acrylic, and polyester are synthetic fibers, while rayon and acetate are regenerated fibers.

Synthetic and regenerated fibers are the types of fibers used in the textile industry that differs in production. Synthetic is the artificial fiber produced by man through chemicals that are stronger and based on polymerization.

The regenerated fibers on the other hand are natural fibers collected from the wood pulp and cellulose of the plant cells. Rayon and acetate are the regenerated fibers that are derived from the cellulose of the plants.

Nylon, acrylic, and polyester are synthetic fibers that are made from chemicals and made by the process of extrusion. Also, they can be produced from substances derived from nature.

Therefore, synthetic fibers include nylon, acrylic, and polyester.

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The density of the block of marble will be 3.36g/cm3.

The density of a material is the measure of how tightly it is packed together. It is expressed as mass per unit volume.

Density is typically classified into two types: absolute density and relative density.

Relative density, also referred to as specific gravity, is the ratio of a material's density to the density of a reference material.

In the given scenario, the mass of the marble is 908g, and volume of the marble is 270cm3.

We know that,

Density = mass/volume.

Density = 908/270.

Density = 3.36g/cm3.

Thus, the answer is 3.36g/cm3.

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Answer:

1, 1, 2

Explanation:

1, 1, 2

Answer:

Formal

Explanation:

Answer:

I think its formal because the question looks a bit fancy by using all the present perfect tense..

hope this helped you

please mark as the brainliest ( if its correct)(ㆁωㆁ)

Answer:  " 145,000 g " .

________________________

Explanation:

________________________

To solve:  Let's use a technique known as "dimensional analysis"

_____________________

\(\frac{287.34 g}{mol}\) * ( 537 mol)  = ? g ;

______________________

Note:  "g" stands for "grams" ;

______________________

The units of "mol" ["mole(s)"] on the "left-hand side of the equation"

                               →  "cancel out" ;  {since: "mol/mol" = 1 "} ;

_________________

And we have:

(287.34 * 537) g ;

________________

Using a calculator, we do the multiplication to get:

________________

  154301.58 g ;  We round this to 3 (three) significant figures;

since:  (287.34 * 537) g ;  the limiting number with the "least number of significant figure" is "537" ; which has 3 (three) significant figures;

_______________

As such:

We have 154301.58 g ;

_______________

We round this to 145,000 g ; since:

"154" are the first 3 (three) significant figures in our value:

 " 154301.58" ;  and the next significant figure, "3" ; is less than "5" ;

If the next significant figure were "0, 1, 2, 3, or 4" ; we  would round down to: 145,000 g; such as in our case.  If the next significant figure were "5, 6, 7, 8, or 9" , we would round up to: 146,000 g .

__________________

The correct answer is:  " 145,000 g ."

The mass of one mole of the new drug is 287.37 g. Then the mass of 537 moles of the drug is its molar mass times the number of moles, that is 154301 g.

Molar mass of a compound is the mass of one mole of the compound. One mole of every compound contains 6.022 × 10²³ molecules. This number is called Avogadro number.

One mole of every elements contains Avogadro number of atoms. Similarly one mole of every compound contains Avogadro number of molecules. The mass of the compound containing these much molecules is called its molar mass.

Given that the molar mass of the drug = 287.34 g/mol

number of moles produced = 537 moles.

mass of 537 moles of drug = 537 mol  × 287.34 g/mol = 154301 g

Therefore, the mass of 537 moles of the drug is 154301 g

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Answer:

An element is a single atom by itself found on the periodic table. A compound  is made when two or more elements chemically bond together. An example of an element is hydrogen. (H) An example of a compound is \(H_{2} O\).

Explanation:

explained above

The volume occupied by a 21.8 g sample of osmium is approximately \(0.964 cm^3\).

The volume (in \(cm^3\)) occupied by a 21.8 g sample of osmium can be calculated using its density of \(22.6 g/cm^3\).

To find the volume, we can use the formula:

Volume = Mass / Density.

Plugging in the values, we have:

Volume = 21.8 g / \(22.6 g/cm^3\)

Now, dividing 21.8 g by \(22.6 g/cm^3\) gives us the volume in cm^3.

Calculating this, we get:

Volume = \(0.964 cm^3\)

So, a 21.8 g sample of osmium would occupy a volume of approximately \(0.964 cm^3\)

In conclusion, the volume occupied by a 21.8 g sample of osmium is approximately \(0.964 cm^3\)

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