3. A student was given an unknown metal. The student determined that the mass of the metal was 30.2 g. The student placed the
metal in a graduated cylinder filled with 20,0 mL of water. The metal increased the volume of water to 22,0 ml. Calculate the
density of the metal and determine the identity of the metal using the table below.
Metal
Density (g/mL)
Lead
11.3
Silver
10.5
Nickel
9.90
Zinc
7.14
0/10000 Word

Substance that gives out ions when dissolved in water, which are able to conduct electricity describes an electrolyte.

When there is an increase in an activity, like sales or manufacturing, the overall amount of an expense, known as a fixed expense, does not change.

Thus, Normal definitions typically include the phrase within a relevant or appropriate range of activity since a change is likely to take place at fixed expense either an exceptionally high or low volume or expense.

Of course, the rent will probably need to adjust if sales quadruple or fall to 20% of the average level. However, as the extreme circumstances are outside of the relevant range for short-term analysis, the current rent of $2,000 is regarded as a fixed expense.)

The following are some instances of costs that are probably set within a fair range of retail sales, The yearly pay for the shop manager.

Thus, When there is an increase in an activity, like sales or manufacturing, the overall amount of an expense, known as a fixed expense, does not change.

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Explanation:

203.31                brainliest

Answer:

203.31g when rounded to 2 decimal places.

Answer:

1632 Hz

Explanation:

We'll begin by calculating the frequency of each wave. This can be obtained as follow:

1st wave:

Velocity (v) = 340 m/s.

Wavelength 1 (λ₁) = 5 m

Frequency 1 (f₁) =?

v = λ₁f₁

340 = 5 × f₁

Divide both side by 5

f₁ = 340 / 5

f₁ = 68 Hz

2nd wave:

Velocity (v) = 340 m/s.

Wavelength 2 (λ₂) = 0.2 m

Frequency 2 (f₂) =?

v = λ₂f₂

340 = 0.2 × f₂

Divide both side by 0.2

f₂ = 340 / 0.2

f₂ = 1700 Hz

Finally, we shall determine the difference in the frequency of both waves.

This can be obtained as follow:

Frequency 1 (f₁) = 68 Hz

Frequency 2 (f₂) = 1700 Hz

Difference =?

Difference = f₂ – f₁

Difference = 1700 – 68

Difference = 1632 Hz

The two functional groups that the aminoacid has according to the picture are amine and carboxyl.

In chemistry and related areas, a functional group can be defined as a group of atoms bonded in a specific molecule that can affect the was the molecule reacts or the specific behavior of it.

In the case of the molecule presented, which is an amino acid, two functional groups can be identified:

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If you traded (converted) 15 Skittles for M&Ms, you will have 20 M&Ms

We'll begin by converting 15 Skittles to cookies. This can be obtained as follow:

6 Skittles = 4 Cookies

Therefore,

15 Skittles = (15 Skittles × 4 cookies) / 6 skittles

15 Skittles = 10 cookies

We can convert 10 cookies to M&Ms as follow:

1 Cookies = 2 M&Ms

Therefore,

10 cookies = (10 cookies × 2 M&Ms) / 1 Cookies

10 cookies = 20 M&Ms

Thus, 15 Skittles is equivalent to 20 M&Ms

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Answer:

SeF4

Explanation:

SeF4

Answer:

The anwser is SeF4

Answer:

\([OH^-]=3.33x10^{-7}M\)

Explanation:

Hello,

In this case, for the given concentration of hydronium, we can compute the pH as shown below:

\(pH=-log([H^+])=-log(3.0x10^{-8})=7.52\)

Now, given the relationship between pH and pOH we can compute the pOH which is directly related with the concentration of hydroxyl in the solution:

\(pOH=14-pH=14-7.52=6.48\)

Then, the concentration of hydroxyl turns out:

\([OH^-]=10^{-pOH}=10^{-6.48}\)

\([OH^-]=3.33x10^{-7}M\)

Best regards.

Acetals are created by combining a carbonyl molecule and an alcohol in the presence of an acid catalyst, such as HCl or H2SO4.

To promote the reaction rate, the reaction is usually carried out at room temperature or slightly elevated temperature. The structure of the final acetal product is determined by the alcohol and carbonyl compound used.

Through acid-catalyzed reactions, acetals can be made from carbonyl compounds and alcohols. An acid catalyst protonates the carbonyl group, making the carbonyl carbon more electrophilic and facilitating nucleophilic assault by the alcohol.

H       H

   |       |

H3C-C-O-CH2-O-C-CH3

   |       |

   H       H

The suggested acetal syntheses involve the use of specific carbonyl compounds and alcohols, as well as the appropriate reaction conditions, to create the desired acetal product.

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0.04 moles of AI will be produced

We have been given the reaction AI(NO₃)₃ + 3Ag → AI + 3AgNO₃, we can see that the reaction is well balanced

⇒ From the equation, we can see that 3 moles of Ag reacts and produces 1 mole of AI

⇒ We can see that the ratio of mole between them is 3 : 1

⇒ Molar mass = Mass/No of moles

⇒ Mass of Ag = Molar mass × no of moles

⇒ Mass of Ag = 108 × 3 = 324 grams

⇒ Similarly, mass of AI = 27 × 1 = 27 grams

So, we can see that 27g of AI is produced by 324g of Ag

15.62 grams of Ag will produce-:

⇒ (15.62 × 27)/324 grams of AI

⇒ 1.301 grams of AI will be produced

⇒ No of moles of AI produced = 1.301/27

⇒ 0.04 moles of AI will be produce

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The volume of potassium iodide used will be 0.087 L or 87 mL

The equation of the reaction goes thus: \(Pb(NO_3)_2(aq) + 2KI --- > PbI_2(s) + 2KNO_3(aq)\)

The mole ratio of the 2 reactants is 1:2.

Mole of 9.42 g \(Pb(NO_3)_2\) = 9.42/331.2 = 0.02844 mol

Equivalent mole of KI = 0.02844 x 2 = 0.05688 mol

Volume of 0.05688 mol, 0.655 mol/L KI = 0.05688/0.655 = 0.087 L or 87 mL

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Answer: separate into ions

form acids and/or bases

Explanation:

Answer:

separate into ions

Explanation:

The combustion of lauric acid is shown as CH3(CH2)10COOH(s) + 18O2(g) -----> 12H20(l) + 12CO2(g)

In a combustion reaction, a substance is burnt in oxygen. If the substance is an organic compound a the case is here, the products are carbon dioxide and hydrogen.

No the equation of the combustion of lauric acid is shown as;

CH3(CH2)10COOH(s) + 18O2(g) -----> 12H20(l) + 12CO2(g)

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Answer:

Volume of the calcium hydroxide solution used is 0.0235 mL.

Explanation:

Moles of KHP =

According to reaction, 2 moles of KHP  with 1 mole of calcium hydroxide , then 0.0330 moles of KHP will recat with ;

of calcium hydroxide

Molarity of the calcium hydroxide solution = 0.703 M

Volume of calcium hydroxide solution = V

Volume of the calcium hydroxide solution used is 0.0235 mL.

Image 1

1) There is more proton repulsion in Uranium than in Barium

2) Barium experiences a stronger force holding the nucleons together

3) The repulsion of the neutrons in Uranium makes the nuclide unstable

4) The higher the atomic number, the more likely that the nucleus is radioactive.

5) U-238 has 146 neutrons

6) U - 235 has 143 neutrons

Image 2;

1) You can minimize background radiation by limiting your outdoor exposure.

2) Cosmic radiation is the most difficult to avoid.

The natural radiation that is constantly present in the environment is known as background radiation.

It includes internal radiation found in all living things as well as cosmic radiation, which originates from the sun and stars and terrestrial radiation, which originates from the Earth.

We know that the repulsion of the protons in the Uranium nucleus is more than that of the barium nucleus because there are more neutrons in the Uranium nucleus. It is this repulsion that makes Uranium unstable.

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Answer:

0.551 moles

Explanation:

To calculate the number of moles in 22 grams of argon, divide the mass by the molar mass:

Number of moles = Mass / Molar mass

Number of moles = 22 g / 39.95 g/mol

Number of moles ≈ 0.551 moles

Therefore, there are approximately 0.551 moles of argon in 22 grams of argon.

Answer:

The more easily these cations form, the more reactive the metal.

Explanation:

Answer:

this is of effective nuclear charge.

Answer:

1.5x10²² particulates

Explanation:

Assuming ideal behaviour, we can solve this problem by using the PV=nRT formula, where:

We input the given data:

And solve for n:

Finally we calculate how many particulates are there in 0.025 moles, using Avogadro's number:

Answer:

Snow forms when the atmospheric temperature is at or below freezing, and there is a minimum amount of moisture in the air. Within a cloud, water droplets condense onto one another, causing the droplets to grow. When these water droplets get too heavy to stay suspended in the cloud, they fall to Earth as rain

Explanation:

Answer:

56.9kg

Explanation:

Given parameters:

∆Hfusion = 334J/g

Amount of energy  = 19kJ or 19 x 10³J

Initial temperature  = 0°C

Unknown:

Quantity of ice melted =  ?

Solution:

This process is a simple phase change from ice to water at the same temperature.

    H  = mL

   m is the mass of the ice

    L is the heat of fusion

   H is the amount of supplied heat

Insert the parameters and solve;

     19 x 10³ = m x 334

          m = \(\frac{19000}{334}\)   = 56.9kg

Answer:

3-methylhexane

Explanation:

For naming alkane molecules follow the following steps

1) Find the longest continuous carbon chain and count the number of carbons

In this structure, it is from the bottom, then up, then to the right. Making a right angle. There is 6 carbons in this chain which means it's a hexane

2) Number the longest carbon chain so the constituents (parts not part of the carbon chain) are connected to the carbon with smallest number possible.

This gives the extra CH3 group connected to carbon 3

3) Put it all together

Methyl connected to carbon 3 + hexane

3-methylhexane

Answer:

Explanation:

The relative speed and distance of atoms in a substance depend on the state of matter.

In a solid, atoms are closely packed together and have minimal movement or vibration. Their relative speed is low and their distance from one another is short.

In a liquid, atoms are still close together but have more movement and freedom of movement than in a solid. Their relative speed is slightly higher than in a solid, and their distance from one another is slightly longer.

In a gas, atoms are widely spaced and have a high degree of movement and freedom of movement. Their relative speed is much higher than in a solid or liquid, and their distance from one another is much greater.

In a plasma, atoms are ionized and have a high degree of movement and freedom of movement. Their relative speed is much higher than in a solid, liquid or gas, and their distance from one another is much greater.

Answer:

\( \huge{4.969 \times {10}^{ - 19} \:J }\)

Explanation:

The energy of the purple lamp can be found by using the formula

E = hf

where

E is the energy

f is the frequency

h is the Planck's constant which is

6.626 × 10-³⁴ Js

From the question.

\( f = 7.5 \times 10^14 \: Hz \)

We have.

\( E = 6.626 \times 10^{-34} \times 7.5 \times 10^{14} \)

We have the final answer as

\(4.969 \times {10}^{ - 19} \: J\)

Answer:

b is the answer

Explanation:

non metals are not shiny, brittle, unmalleable, and are poor conductors of thermal energy and electrical current.

A nonmetal is brittle, dull, and low in density.  

• Non-metals refer to the elements that produce negative ions by gaining or accepting electrons. The non-metals generally possess 4, 5, 6, or 7 electrons in their valence shell. The non-metals are those, which are devoid of all the metallic properties.  

• The non-metals in their solids-state are brittle, thus, they lack ductility and malleability exhibited by the metals.  

• The non-metals are not shiny like metals, they are dull in color.  

• The non-metals seem to possess low density, primarily as non-metals seem to prevail either in a liquid or solid-state. The non-metals lack the dense and closed packing in the lattice, which is seen in metals.  

Thus, non-metals are brittle, dull, and low in density.  

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Answer:

\(E=2.85\times 10^{-23}\ J\)

Explanation:

Given that,

The frequency of light, \(f=4.3\times 10^{10}\ Hz\)

We need to find the energy of light. The formula for the energy is given by :

\(E=hf\) Where h is Planck's constant

Putting all the values of h and f, we get :

\(E=6.63\times 10^{-34}\times 4.3\times 10^{10}\\\\E=2.85\times 10^{-23}\ J\)

So, the energy of light is \(2.85\times 10^{-23}\ J\).

Answer:

If n = 4, then the possible values of 1 and m depend on the equation or expression being used. Without more information, it is impossible to determine what the possible values of 1 and m might be. Can you please provide more context or information about the problem you are trying to solve?

A brewed black tea generally has 81.30 milligrams of TA per 100 mL of water (which is to say it is at equilibrium). If a tea bag is steeped in 150. mL of water, 54.2 is the concentration of TA at equilibrium.

A substance's concentration is the amount of solute present in a given amount of solution. Molarity is the number of moles of solute in one liter of solution and is used to express concentrations.

Given:

M₁ = 81.30 milligrams

M₂ = ?

V₁ = 100ml

V₂ = 150ml

M₁V₁ = M₂V₂

By substituting given values in this equation and we get,

81.30 × 100 = M₂ × 150

M₂ = 81.30 × 100 / 150

= 54.2

Thus,  54.2 is the concentration of TA at equilibrium.

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