Apply Concepts Two chemists each plan an investigation in which they will combine hydrogen gas with chlorine gas to observe the chemical reactivity. The plans differ in that one will use 25 milligrams each of hydrogen and chlorine, and the other will use 1000 times this amount, i.E., 25 grams each of hydrogen and chlorine. Can the investigations reach similar conclusions about the reactivity of hydrogen with chlorine? Explain.

Answer:

H3PO4 + 3KOH -> K3PO4 + 3H20

Answer:

hope its helpful to uh....

Answer:

D. an orbital notation of the atom

Explanation:

i took the test

Answer:

During the process of polymerization, monomers

combine by sharing electrons. This process forms a polymer, which is made of repeating subunits. The resulting material is used in a variety of ways.

Answer:

monomers and polymer.

Explanation:

The balanced chemical formula for the reaction of silver sulphide and aluminium is

3Al + 4Ag2S 6Ag + Al2S3.

The balanced equation's stoichiometry can be used to calculate how many moles of silver were produced during the reaction. In other words, for every 4 moles of silver sulphide, 6 moles of silver are produced due to the silver's 4/4 coefficient on the reactant side and 6/6 coefficient on the product side.

The number of moles of silver produced by the reaction of 6 moles of aluminium and 4 moles of silver sulphide is 6. The balanced equation's stoichiometry, which states that 4 moles of silver sulphide result in the production of 6 moles of silver, can be used to determine this.

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Answer:

ammonium phosphite

To react with 16.4 g of Fe₂O₃, we would need 3.700 g of carbon. This calculation is based on the stoichiometry of the balanced chemical equation and the molar masses of Fe2O3 and carbon (C).

To determine the grams of carbon required to react with 16.4 g of Fe₂O₃, we need to use the stoichiometry of the balanced chemical equation:

Fe₂O₃,(s) + 3C(s) → 2Fe(s) + 3CO(g)

From the balanced equation, we can see that 3 moles of carbon (C) react with 1 mole of Fe₂O₃,(Fe₂O₃, has a molar mass of 159.69 g/mol) to produce 3 moles of CO (CO has a molar mass of 28.01 g/mol).

First, we need to convert the mass of Fe₂O₃, to moles:

16.4 g Fe₂O₃,* (1 mol Fe₂O₃, / 159.69 g Fe₂O₃,) = 0.1027 molFe₂O₃,

According to the stoichiometry of the balanced equation, 1 mole of Fe₂O₃, reacts with 3 moles of carbon (C). Therefore, 0.1027 mol Fe₂O₃,would require:

0.1027 mol Fe₂O₃,* (3 mol C / 1 mol Fe₂O₃,) = 0.3081 mol C

Finally, we can convert the moles of carbon to grams:

0.3081 mol C * (12.01 g C / 1 mol C) = 3.700 g C

Therefore, 16.4 g of Fe₂O₃, would require 3.700 g of carbon to react.

To react with 16.4 g of Fe₂O₃,, we would need 3.700 g of carbon. This calculation is based on the stoichiometry of the balanced chemical equation and the molar masses of Fe₂O₃, and carbon (C).

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To determine the mass of a single molecule of ethyl alcohol, we need to first calculate the mass of one mole of C2H5OH.

The molecular weight of C2H5OH is 46.07 g/mol, so one mole of C2H5OH has a mass of 46.07 grams. We can convert this to kilograms by dividing by 1000, which gives us 0.04607 kg. Next, we need to determine the number of molecules in the formula . We can do this by using Avogadro's number, which is 6.022 x 10^23 molarity per mole.

To find the number of moles in the sample, we divide the volume by the density:
mass = density x volume
mass = 806 kg/m3 x 2.82 x 10-3 m3
mass = 2.27772 kg

number of moles = mass / molecular weight
number of moles = 2.27772 kg / 46.07 g/mol
number of moles = 0.0495 mol

Finally, we can calculate the number of molecules in the sample by multiplying the number of moles by Avogadro's number:  number of molecules = number of moles x Avogadro's number
number of molecules = 0.0495 mol x 6.022 x 10^23 molecules/mol
number of molecules = 2.978 x 10^22 molecules

In summary, the mass of a single molecule of ethyl alcohol is 7.71 x 10^-26 kg, and there are approximately 2.978 x 10^22 molecules in the given sample.

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Answer:

I mean If you're asking a question, then yes.

Answer:

D. They have the same number of protons as electrons.

Explanation:

Protons are found in the nucleus of the atom and have a positive charge while electrons orbit around the nucleus and have a negative charge. Usually, in a neutral atom of an element, the number of protons is equal to the number of electrons. This is why the atom has no charge because the positive and negative charges cancel out. When an atom loses an electron its charge turns positive while when it gains an electron its charge turns negative.

The theoretical yield is the reaction yield that measures the product of the reaction from the conversion of the limiting reagent. The theoretical yield is 160 gm.

Mass or the theoretical yield is the result of the multiplication of mole and the molar mass of the compound.

The reaction between hydrogen and oxygen is shown as,

\(\rm 2H_{2} + O_{2} \rightarrow 2H_{2}O\)

Moles of water is calculated as:

\(\begin{aligned}\rm moles &= \rm \dfrac{mass}{molar\; mass}\\\\&= \dfrac{18}{2}\\\\&= 9\;\rm moles\end{aligned}\)

The theoretical yield of water is calculated as:

\(\begin{aligned}\rm \text{weight of water} &= \rm moles \times molar \; mass\\\\&= 9 \times 18\\\\&= 162 \;\rm gm\end{aligned}\)

Therefore, option D. 160 gm is the theoretical yield of water.

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Jill needs to deposit $14,310.09 today to meet her goal of having $40,000 available for her daughter's college needs at age 18.

To determine the amount Jill needs to deposit today in order to fund her daughter's college needs, we can follow a three-step calculation process.

First, we need to calculate the future value of $10,000 per year at an after-tax return of 8% over the 16-year period (from age 2 to 18). Considering an inflation rate of 3%, we can adjust the future value for the erosion of purchasing power.

Using the future value of an ordinary annuity formula, we find that the accumulated value at age 18 would be approximately $236,852.46.

Next, we need to find the present value of this future amount by discounting it back to the present day.

Using the present value of an ordinary annuity formula with an 8% discount rate, we find that Jill needs to deposit $18,519.87 today to achieve her goal of $40,000 available ($10,000 per year) when her daughter turns 18.

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Answer:  B

Explanation:  Graph B compares the two temperatures on separate lines so that we can see the comoparison directly, as a function of time.  Not only does the graph quickly answer which condition id most favorable to colony growth, but it also hints at some behaviors that may accelerate growth as time goes on.  Graph C is a possible answer, if the only question is which promotes growth the fastest.   But the questions asks "compare," which Graph B does not allow as well as Graph C.

Answer:

S=Solid

Mg=Solid

B=Solid

Ca=Solid

Ar=Gas

H=Gas

Cs=Solid

Zn=Solid

Br=Liquid

Sb=Solid

N=Gas

Hg=Liquid

Explanation:

Answer:

Table salt is made up of two elements

Sodium and Chlorine

Explanation:

\(Na + Cl_2 - > NaCl\)

How Rock salt is gotten

: As the brine boils in the first effect, water evaporates producing further steam and causing salt crystals to grow. As the brine boils and the water starts to evaporate, a thick salt slurry of brine and salt crystals is formed.

Explanation:

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Hope it helps

The structure of 3-ethyl-2 fluroheptane is attached. The chemical formula of the compound is C9H19F.

It is an organic compound which has one pair of hydrogen and acceptor and zero hydrogen bond donor.

The chemical formula of the compound is \(C_9H_1_9_F.\)

Thus, the structure of 3-ethyl-2 fluroheptane is attached. The chemical formula of the compound is C9H19F.

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Answer:

The activation energy for the forward reaction is the amount of free energy that must be added to go from the energy level of the reactants to the energy level of the transition state. ... Once a reactant molecule absorbs enough energy to reach the transition state, it can proceed through the remainder of the reaction.

Explanation:

Answer: Activation energy is how much energy it takes for a reaction to occur.

Explanation:

Answer:

100g gold ring - 58g gold.

Explanation:

Assuming that the 100% represents the 100g of the gold ring, with a mathematical rule of three we can calculate the 58% of gold:

So, in 100g of the gold ring, there are 58g of gold.

Answer:

algabra

Explanation:

air

Given what we know about the energy of particles in each state, we can confirm that the best comparison between water and ice is that particles of liquid water have more energy than particles of ice.

Therefore, we can confirm that since the heat required to keep water in a liquid state excites the particles and gives them more energy, the correct comparison would be to say that particles of liquid water have more energy than particles of ice, option B is correct.

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Answer:

b.

Explanation:

Answer:

the metal gets cold and week

Explanation:

Answer:

1 atom of carbon on the reactant side (CH₄ is methane, 1 carbon, 4 hydrogen).

1 atom of carbon on product side (Law of Conservation of energy proves this).

4 hydrogen on reactant side (CH₄ is methane, 1 carbon, 4 hydrogen).

4 hydrogen on product side (Again, the Law of Conservation of energy proves this)

4 oxygen atom on the reactant side (2O₂ means two diatomic molecules, or two oxygen molecules of 2 atoms each).

4 oxygen atoms on the product side (Law of Conservation of energy).

2 molecules of oxygen on the reactant side.

2 molecules of water on the product side

Yes, the chemical equation is balanced. The amount of atoms is the constant on both the reactant and product side.

A Ionic bond is chemical bond between two oppositely charged ions because of the transfer of valence electrons between them.

A covalent bond is a chemical bond in which two or more atoms share electrons between them. They can also form polar covalent bond or non-polar covalent bonds (Although that depends on the electronegativities of the atom).

The bond of a carbon dioxide molecule is covalent bond (Polar covalent bond if you've learned that yet)

Potassium Fluoride (KFl) form an ionic bond.

2Al₂O₃ --> 4Al + 3O₂

A reducing agent loses electrons while and oxidizing agent gains electrons.

In an endothermic reaction, the total bond energy in the reactants is greater than the bond energy of products so energy is absorbed by the reaction. (For an endothermic reaction, more energy needs to be absorbed than released).

Answer:

Marble forms when a pre-existing limestone rock is heated to such extreme temperatures that the minerals grow larger and fuse together. With this in mind, a hard marble rock would be the perfect example of the inner core of Earth since its packed, and full of high heat levels.

Explanation:

Answer:

TRIPLE COVALENT BOND

Explanation:

Each nitrogen atom needs 3 more electrons, so they share 3 pairs of electrons between the two nitrogen atoms

A nitrogen atom can fill its octet by sharing three electrons with another nitrogen atom, forming three covalent bonds, a so-called triple bond. The triple bond formation of nitrogen is shown in the following figure.

Image result for triple bond in nitrogen

Answer:

50 m/s^2

Explanation:

In this case, we're using Newton's Second Law: Force = mass × acceleration.

We are given the force as 250 newtons and the mass as 50 kg, so 250/50 = 50 m/s^2.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

The acceleration is the ratio of the force applied to an object to the mass. A 50 kg rocket with a force of 250 newtons has an acceleration of 50 m/s².

Newton's second law states about a motion depicts the relationship between mass, acceleration, and force. The motion experienced by an object will be more if the force applied is more.

It is a quantitative description that relates the acceleration experienced by the body due to the applied force. It is given as,

F = m × a

Given,

Mass of water rocket (m) = 50 Kg

Force (F) = 250 N

Substituting values above:

250 N = 50 × a

a = 250 ÷ 50

= 50 m/s²

Therefore, the water rocket weighing 50 kg with a force of 250 N experiences an acceleration of 50 m/s².

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Answer:

The heterogeneous mixture that has very small dispersed particles and stays mixed for a long time is colloid. Because colloid has particles that are small enough to suspended but are as large that they can scatter light.

Answer:

1. heterogeneous

2. colloid

3. suspension

The statement is true. Voluntary physical activity is a type of energy expenditure that we can directly control through our conscious decisions to engage in physical activities such as exercise, sports, or any form of physical movement.

This type of energy expenditure is known as "discretionary physical activity" and it contributes to our daily energy expenditure along with other components such as basal metabolic rate, thermic effect of food, and non-exercise activity thermogenesis. By increasing our level of voluntary physical activity, we can increase our overall energy expenditure and potentially achieve weight loss or maintenance goals. It is important to note that engaging in physical activity has many health benefits beyond just managing body weight, such as improving cardiovascular health, increasing muscle strength and endurance, and reducing the risk of chronic diseases. Therefore, it is highly recommended to incorporate regular physical activity into our daily routine for overall health and wellness.

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