Can someone explain to me what I'm doing wrong? 68mL was wrong as well. Selecting "tenths place" for 3a and "hundredths place" for 3b and then putting a decimal was wrong as well. I'm lost as to what I should do.

Answer:

Explanation:

Density is the ratio of mass to volume. The SI unit of density is kg/m³. Given that the mass of the block = 23.4 g = 0.0234 kg

The volume of block = change in water level = volume of water rise after block is placed - volume of water = 28.7 ml - 25 ml = 3.7 ml

Volume of block = 3.7 ml = 0.0037 l

1000 l = 1 m³

0.0037 l = 0.0037/1000 m³ = 3.7 × 10⁻6 m³

Density = mass / volume

Density = 0.0234 kg / 3.7 × 10⁻6 m³ = 6324 kg/m³

Answer:

See explanation

Explanation:

For this question, we must bear in mind that in the isomers what must change is the structure of the molecule but the same condensed formula must be maintained. With this in mind we can have the following options for each of the molecules given by the problem:

(a) [tex]C_3H_7Cl[/tex]

  -) 1-Chloropropane

  -) 2-Chloropropane

(b) [tex]C_4H_1_0[/tex]

  -) butane

  -) isobutane

(c) [tex]C_5H_1_2[/tex]

  -) n-pentane

  -) isopentane

  -) neopentane

(d) [tex]C_4H_1_0O[/tex]

  -) butan 1-ol

  -) butan 2-ol

  -) 2-methylpropan-1-ol

  -) 2-methylpropan-2-ol

  -) 1-methoxypropane

  -) ethoxyethane

  -) 2-methoxypropane

(e) [tex]C_3H_6Cl_2[/tex]

  -) 1,1-dichloropropane

  -) 1,2-dichloropropane

  -) 1,3-dichloropropane

  -) 2,2-dichloropropane

See figure 1 to further explanations

I hope it helps!

Answer:

74.456.6.4.7.5.3.33-6.57

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

From the question

mass = 57 g

volume = 125 cm³

Substitute the values into the above formula and solve for the Density

That's

We have the final answer as

Hope this helps you

Answer:

13

Explanation:

From the dilution formula;

C1V1 = C2V2

C1= concentration of the stock solution = 0.2 M

V1 = volume of the stock solution = 50.0 ml

C2= concentration of the diluted solution= the unknown

V2= volume of diluted solution= 100 ml

C2= C1V1/V2

C2= 0.2 × 50/100

C2= 0.1 M

But

pOH= -log[OH^-]

But [OH^-] = 0.1 M

pOH= -log [0.1]

pOH= 1

Since;

pH +pOH = 14

pH= 14 - pOH

pH= 14- 1

pH= 13

Answer:

1.59 × 10²⁴ molecules

Explanation:

Step 1: Convert the mass to grams

We will use the relationship 1 lb = 453.59 g.

2 lb × (453.59 g/1 lb) = 907.18 g

Step 2: Calculate the moles corresponding to 907.18 grams of sucrose (table sugar)

The molar mass of sucrose is 342.3 g/mol.

907.18 g × (1 mol/342.3 g) = 2.65 mol

Step 3: Calculate the molecules in 2.65 moles of sucrose

We will use Avogadro's number: there are 6.02 × 10²³ molecules of sucrose in 1 mole of sucrose.

2.65 mol × (6.02 × 10²³ molecules/1 mol) = 1.59 × 10²⁴ molecules

Answer:

m = 0.659 ounce

Explanation:

It is given that,

The thickness of a Teflon coating is, d = 1 mm

Area of the coating, A = 36 inch²

The density of Teflon, d = 0.805 g/mL

We need to find ounces of Teflon are needed.

Firstly, find the volume of the Teflon needed,

1 inch² = 6.4516 cm²

36 inch² = 232.258 cm²

Density,

[tex]\rho=\dfrac{m}{V}[/tex]

V is volume of the Teflon needed, V = Ad

So,

[tex]m=\rho V\\\\m=0.805\ g/cm^3\times 232.258\ cm^2 \times 0.1\ cm\\\\m=18.69\ g[/tex]

Also, 1 gram = 0.035274 ounce

18.69 gram = 0.659 ounce

So, 0.659 ounces of Teflon are needed.

Answer:

1900 mmHg.

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 500 mL

Initial pressure (P1) = 760 mmHg

Final volume (V2) = 200 mL

Final pressure (P2) =?

Temperature = constant.

Since the temperature is constant, we shall use the Boyle's law equation to obtain the new pressure as illustrated below:

P1V1 = P2V2

760 × 500 = P2 × 200

Divide both side by 200

P2 = (760 × 500) / 200

P2 = 1900 mmHg

Therefore, the new pressure is 1900 mmHg.

Answer:

Ag(s)

Explanation:

Metal atoms are held together by the metallic bond. The metallic bond consists of cations held together by a sea of mobile electrons.

Thus, the crystal of Ag(s) is composed of silver ions held together by a sea of mobile electrons. Electrostatic forces of attraction holds the crystal together.

The substance describing the cations bonded by mobile electrons is Ag. Thus option B is correct.

The chemical bond with the ability to exist as a cation with mobile electrons has been a metallic bond.

The metallic bond if found to be existing of central nuclei, with the sea of electrons present outside the nucleus, and has been shared by the atoms.

With the presence of the metal or metallic bond in a compound, the cation has been bonded with the mobile electrons.

The chemical bond present in the following compounds has been:

[tex]\rm a.\;S_8\;=\;Covalent\;bond\\b.\;Ag\;=\;Metallic\;bond\\\\\rm c.\;SiO_2\;=\;\rm Covalent\;bond\\\\d.\;KCl\;=\;Ionic\;bond\\\\e.\;Kr(I)\;=\;Covalent\;bond[/tex]

The substance with the presence of metallic bond has been Ag. Thus, Ag has presence of cations bonded together by mobile electrons. Thus, option B is correct.

For more information about the cations, refer to the link:

https://brainly.com/question/1333307  

the answer to it is C...

Answer:

C.

Explanation:

All other questions are opinion-based and can't have a definite answer.

Answer:

Explanation:

Relation between ΔG₀ and K ( equilibrium constant ) is as follows .

lnK =  -  ΔG₀ / RT

[tex]K = e^{-\frac{\triangle G_0}{RT}[/tex]

The value of R and T are same for all reactions .

So higher the value of negative ΔG₀ , higher will be the value of K  .

Mg(s) + N₂0(g) → MgO(s) + N₂(g)

has the ΔG₀ value of -673 kJ which is highest negative value . So this reaction will have highest value of equilibrium constant K .

Answer:

B Is The Correct Answer

In the image, balls that look alike represent the same type of atom. Based on this information, the images below represent  molecules of elements. Therefore, option B is correct.

A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

A substance that cannot be converted into another substance is said to be an element. Each type of atom that makes up an element is unique! According to atomic number, elements are listed in the periodic table.

The three categories of elements are metal, non-metal, and metalloid. Metals like sodium, calcium, caesium, and other elements on the extreme left of the periodic table are examples of this. The non-metals, such as carbon, chlorine, and oxygen, are often referred to as the elements on the right side.

Thus, option B is correct.

To learn more about an element, follow the link;

https://brainly.com/question/13025901

#SPJ2

Answer:

25 mL

Explanation:

The water level increased from 20mL to 45mL

That is the volume of the metal

45 - 20 = 25

The volume of the metal was 25 mL

Density = mass / volume

Density = 150 / 25

Density = 6 grams / mL

Answer:False

Explanation:

Kinda of a opinionated question, but unless you call -12 C warm then the answer is False

Answer: Inversely  ,   Directly

Explanation:

The energy of a photon is inversely proportional to its wavelength and directly proportional to its frequency.

As can be seen from this equation;

E = hv  = h c / ∧

Where E = Energy of a photon

           v = Frequency

           h = Planck Constant

           c = speed of light

           ∧  = Wave length

Answer:

The water bends due to the static electricity on the balloon.

Explanation:

The static electricity you built up by rubbing it against the balloon attracts the stream of water, bending it towards the comb or balloon like magic!

Negatively charged particles called electrons jump the wool to the balloon as they rub together, the comb now has extra electrons and is negatively charged. The water features both positive and negatively charged particles and is neutral. Positive and negative charges are attracted to each other so when you move the negatively charged balloon towards the stream, it attracts the water's positively charged particles and the stream bends!

Answer:

A) high spin complex

B) low spin complex

Explanation:

A) VCI3(H20)3 is a high spin complex and this is because the complex has a weak field ligands all . this weak field ligands makes it impossible for pairing to take place

B) Fe(NH3)23 is a low spin complex and this is because the complex is made up of strong field ligands, this strong field ligands makes it possible for paring to take place

note : Ligands in which its donor atoms are ; Nitrogen,phosphorous or carbon are considered strong ligands

Answer:

c) Cohesive forces stronger than adhesive forces reduce the height of the liquid in the capillary tube, whereas adhesive forces stronger than cohesive forces increase the height of the liquid.

Explanation:

Two types of forces bring about capillary action.

One is cohesion, which is the intermolecular attraction between like molecules (that is, the liquid molecules). The second force, called adhesion, is an attraction between unlike molecules, such as those in a liquid and in the sides of a glass tube.

If adhesion is stronger than cohesion, the contents of the tube will be pulled upward. This process continues until the adhesive force is balanced by the weight of the liquid in the tube.

Answer:

7.00ft

Explanation:

Explanation:

oxygen has a negative charge

sodium has a positive charge

opposites attract

Answer:

1.804295

Explanation:

Hope this helps <3

Answer:

Check if the equipment is in a good condition.

Check if it can cause any harmful hazards.

Check if the equipment is what you need for the experiment

Answer:

Hey!

0.867 + 3.72 + 18.0045 = 22.5915

Explanation:

22.5915 ROUNDED TO 2 significant figures...

2 s.f = 23

(3 s.f = 22.6)

SO ROUNDING TO 2 s.f is easier and more accurate...

ANSWER = 23 (2 s.f)

HOPE THIS HELPS!!

The calculation, rounding your answer to the proper number of significant figures would be 22.60.

0.867 +3.72 + 18.0045 =22.60

In positional notation, significant figures refer to the digits in a number that is trustworthy and required to denote the amount of something, also known as the significant digits, precision, or resolution.

As given in the problem we have to perform the calculation, by rounding the answer to the proper number of significant figures.

0.867 +3.72 + 18.0045 =22.5915

                                      =22.59

                                      =22.60

Thus, the calculation, rounding your answer to the proper number of significant figures would be 22.60.

To learn more about significant figures here, refer to the link;

brainly.com/question/14359464

#SPJ2

Answer:

1.8 × 10² s

Explanation:

Let's consider the reduction that occurs upon the electroplating of copper.

Cu²⁺(aq) + 2 e⁻ ⇒ Cu(s)

We will establish the following relationships:

The time  that it would take for 336 mg of copper to be plated at a current of 5.6 A is:

[tex]336mgCu \times \frac{1gCu}{1,000mgCu} \times \frac{1molCu}{63.55gCu} \times \frac{2mole^{-} }{1molCu} \times \frac{94,486C}{1mole^{-}} \times \frac{1s}{5.6C} = 1.8 \times 10^{2} s[/tex]

Answer:

it is b

Explanation:

because i took the thing

Answer:

H2 > N2 > Ar > CO2

Explanation:

Graham's law explains why some gases efuse faster than others. This is due to the difference i their molar mass. Generally; The rate of effusion of gaseous substances is inversely proportional to the square rot of its molar mass.

This means gases with low molar masses would have higher efusion rate compared to gases with higher molar masses.

So now we just need to compare the molar masses of the various gases;

Ar - 39.95

CO2 - 44.01

H2 - 2

N2 - 28.01

To obtain the order in increasing rate, we have to order the gases in decreasing molar mass. This order of increasing rate is given as;

H2 > N2 > Ar > CO2

Answer:

2.10 h

Explanation:

Step 1: Given data

Step 2: Convert the distance between the two cities to km

We will use the relationship 1 km = 0.62 mi.

195 mi × (1 km/0.62 mi) = 315 km

Step 3: Calculate the time required for the train to travel 315 km

315 km × (1 h/150.0 km) = 2.10 h

Answer:

C is the answer.

Explanation:

A solvent is a substance that becomes a solution by dissolving a solid, liquid, or gaseous solute. A solvent is usually a liquid, but can also be a solid or gas. The most common solvent in everyday life is water. Most other commonly-used solvents are organic (carbon-containing) chemicals.

Answer:

Because these lights work with a combination of gases that emits a yellow-orange light that reacts with the paint of cars.

Explanation:

The mercury or sodium vapor lights work with a very interesting gas structure that when reacting with each other, emit yellow-orange lights that react with the color of the cars making them appear to have other colors.

When these lights are placed in parking lots, the white cars will turn orange. This is because the white paint used in cars contains particles that emit a yellow-orange spectrum. However, cars of other colors do not have these particles and therefore become black under these lights.

Hello. You did not enter answer options. The options are:

a. The OH group was removed from the reactante

b. The OH group was replaced by an H atom.

c. Two atoms were removed from the reactant.

d. An H atom abd a OH group have been removed drom the reactant.

In addition, you forgot to add an image that complements the question. The image is attached below.

Answer:

d. An H atom abd a OH group have been removed drom the reactant

Explanation:

As you can see in the image, the reagent is an alcohol molecule. For the transformation of the alcohol molecule into an alkene molecule, it is necessary that an intramolecular dehydration occurs, that is, it is necessary that a water molecule (two H atoms and an O atom) go out from inside the alcohol and that is exactly what happened, that is, we can say that an H atom and an OH group were removed from the reagent to form the alkene.