Calculate the density of an
object with a mass of 20 g
and a volume of 2.3 mL.

Answers

Answer 1

Answer:

8.7g/mL

Explanation:

I used the density formula to solve. d=m/v= 20g/2.3mL

Answer 2

Answer:

8.7 g/ml

Explanation:

the formula for density is D = M/V


Related Questions

Lead(II) nitrate and ammonium iodide react to form lead(II) iodide and ammonium nitrate according to the reaction

Answers

Answer:

1.186L or 1186mL.

Explanation:

The volume of a 0.290 m NH4I solution that is required to react with 253 ml of a 0.680 m Pb(NO3)2 solution is 1.186 liters or 1186 ml.

50 POINTS
Assume that the variables x and y are inversely related. If k = 18, what is the value of y for each of the following points?
Be sure and record your data to be used in the following problem.
х y k

1 18
A: 18,0.05,9
2 18
A: 0.11,36,9
3 18
A: 0.16,6,54
6 18
A: 0.33,108,3
9 18
A: 162,0.5,2
18 18
A: 324,0.75,1

Answers

Answer:

9/.05=180. I think it's 1

Explanation:

If x and y are inversely proportional then the product of xy =k  or y=k/x

Isotopes have
Question 1 options:

A)

different numbers of both protons and neutrons in their nuclei.

B)

a different number of neutrons in their nuclei.

C)

a different number of protons in their nuclei.

D)

a different number of electrons.
Question 2 (5 points)
An aqueous solution
Question 2 options:

A)

must contain three or more substances.

B)

is a single-phase heterogeneous mixture.

C)

has water as the solvent.

D)

has water as the solute.
Question 3 (5 points)
Which of the following is a homonuclear diatomic molecule?
Question 3 options:

A)

NH3

B)

CO

C)

2CO2

D)

H2
Question 4 (5 points)
Given a container of a solution of 5% HCl, all samples tested from this same bottle will have the same mass ratio of hydrogen to chlorine. This is an application of
Question 4 options:

A)

the law of conservation of energy.

B)

the law of multiple proportions.

C)

the law of conservation of mass.

D)

the law of constant composition.
Question 5 (5 points)
Elements in the same period
Question 5 options:

A)

have the same principal quantum number.

B)

form bonds with the same type of elements.

C)

have the same number of valence electrons.

D)

have the same number of protons.
Question 6 (5 points)
Which of the following contribute(s) to most of the mass of an atom?
Question 6 options:

A)

Neutrons only

B)

Protons and neutrons

C)

Protons and electrons

D)

Protons only
Question 7 (5 points)
In a certain chemical reaction, the bonds of the products contain more energy than the bonds of the reactants. For the reaction to occur, which of the following best describes what occurred?
Question 7 options:

A)

Energy was released, so the reaction is endothermic.

B)

Energy was released, so the reaction is exothermic.

C)

Energy was added, so the reaction is endothermic.

D)

Energy was added, so the reaction is exothermic
Question 8 (5 points)
A solution
Question 8 options:

A)

is a single-phase homogeneous mixture.

B)

must contain water.

C)

is always a liquid.

D)

can contain more than two phases.
Question 9 (5 points)
Which of the following is true of alloys?
Question 9 options:

A)

They can only be composed of metals.

B)

They must be held together by chemical bonds.

C)

They're liquid solutions.

D)

They must contain a metal.
Question 10 (5 points)
Which of the following best describes an atomic number? An element's identity is defined by its atomic number; this means it represents the number of
Question 10 options:

A)

electrons in the element.

B)

neutrons in its nucleus.

C)

protons plus neutrons in its nucleus.

D)

protons in its nucleus.
Question 11 (5 points)
Electrons in the outermost shell of an atom that are available to bond with the electrons of other atoms are
Question 11 options:

A)

cations.

B)

free electrons.

C)

valence electrons.

D)

anions.
Question 12 (5 points)
Main group elements have valence electrons in which suborbitals?
Question 12 options:

A)

d and f

B)

s and p

C)

p and f

D)

s and d
Question 13 (5 points)
Molecules have
Question 13 options:

A)

only kinetic energy.

B)

only potential energy.

C)

both potential and kinetic energy.

D)

neither kinetic nor potential energy.
Question 14 (5 points)
The majority of elements are
Question 14 options:

A)

metalloids.

B)

nonmetals.

C)

metals.

D)

inert.
Question 15 (5 points)
A student found the mass of an object to be 26.5 g. To find the volume, the student submerged the object in a graduated cylinder of water. Submerging the object in the water in the graduated cylinder increased the water level by 24.1 mL. The density of the object is
Question 15 options:

A)

1.0906 g/mL.

B)

0.909 g/mL.

C)

1.10 g/mL.

D)

1.1 g/mL.
Question 16 (5 points)
Mass and energy are conserved
Question 16 options:

A)

only in chemical changes.

B)

in chemical changes and physical changes.

C)

always in physical changes and sometimes in chemical changes.

D)

only in physical changes.
Question 17 (5 points)
Which of the following can't be broken down any further chemically?
Question 17 options:

A)

Compounds

B)

Elements

C)

Matter

D)

Molecules
Question 18 (5 points)
A/an _______ is the smallest unit of matter that has the characteristics of a chemical element.
Question 18 options:

A)

atom

B)

proton

C)

molecule

D)

electron
Question 19 (5 points)
The distance between consecutive peaks or troughs in a wave is
Question 19 options:

A)

frequency.

B)

displacement.

C)

amplitude.

D)

wavelength.
Question 20 (5 points)
The phase transition of dry ice (frozen carbon dioxide) to gas is an example of
Question 20 options:

A)

condensation.

B)

sublimation.

C)

deposition.

D)

vaporization.

I WILL GIVE BRAINLIEST IF YOU CAN ANSWER THEM

Answers

Answer:

b

Explanation:

dueto isotopes haveno thesame neutral numbee hence b iscorrect

Answer:

b

Explanation:

. If you apply heat to the copper bar, its density will

Answers

Answer:

Decrease

Explanation:

Density is defined as the mass per unit volume. Density is highly influenced by temperature.

The density of metals and copper is inversely proportional to the temperature, it means density of copper decreases with an increase in temperature or when heated. This is so because when the copper is heated, the copper atoms start vibrating faster that allows the collision of atoms with each other faster and occupying more volume than before. As the copper atoms occupy more volume, the density of copper decreases.

Hence, the correct answer is "On applying heat the density of copper decreases".

The specific heat of silver is 0.24 J/g•°C. How many joules of energy are needed to warm 4.37 g of silver from 25.0°C to 27.5°C?

A. 2.6 J

B. 46 J

C. 0.14 J

D. 0.022 J

Answers

The heat energy needed to change the temperature of  4.37 gram of silver sample of specific heat 0.24 J/ g °C from a temperature of 25 to 27.5 °C is 2.6 J.

What is calorimetry ?

Calorimetry is an analytical  technique used to determine the heat energy absorbed or released by  a system. The calorimetric equation relating the heat energy q with the mass of the substance m, specific heat c and temperature difference ΔT is given as:

q = m c ΔT.

Given that the mass of the sample of iron = 20 g

temperature difference   ΔT = 27.5 - 25 = 2.5 °C

specific heat c = 0.24J/ g °C.

The heat energy absorbed by the sample is calculated as follows:

q = 4.37 g ×  0.24 J/ g °C × 2.5 °C

 = 2.6 J.

Therefore, the heat energy required to the raise the temperature of the sample of iron is 2.6 J.

Find more on calorimetry :

brainly.com/question/11477213

#SPJ6

Non Polar covalent bonds are between

Answers

Answer:

atoms that share a pair of electrons with each other

Explanation:

What is matter?
A.
Anything that has energy
B.
Anything that changes volume
C.
Anything that takes up space
D.
Anything that produces heat
a b c or d no bull

Answers

Answer:

C. Anything That Takes Up Space.

Explanation:

WILL MARK BRAINLIEST (if correct)

Answers

C or D i think maybe

Answer:

D and A

Explanation:

The water cycle would not be possible without ______ and ________.
a. evaporation; condensation
b. gravity; sun
c. precipitation; rain
d. gravity; precipitation

Answers

The answer is B and I’m typing more cuz I need 20 characters

The process by which vesicles move substances out of a cell is

Answers

Exocytosis describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell, as shown in the Figure below. Exocytosis occurs when a cell produces substances for export, such as a protein, or when the cell is getting rid of a waste product or a toxin.

A cough syrup contains red dye #40, with a concentration of 4.68 x 10-3 M.a.If you dilute the cough syrup by adding 175 mL of water to a 250. mL sample of the cough syrup, what will be the final concentration?

How do I do this?

Answers

Answer:

[tex]M_2=2.75x10^{-3}M[/tex]

Explanation:

Hello.

In this case, since a dilution process is a process by which the concentration of a solution decreases due to the increase of volume by usually adding water, it is important to take into account that the moles remain unchanged:

[tex]n_1=n_2[/tex]

Whereas in terms of molarity (M=n/V) can be written as:

[tex]M_1V_1=M_2V_2[/tex]

In such a way, since the initial concentration is 4.68e-3 M and the volume of such solution is 250. mL, the final volume results from mixing 250 mL of this solution with 175 mL, that is, to a volume of 425 mL. Thus, the concentration turns out:

[tex]M_2=\frac{M_1V_1}{V_2} =\frac{4.68x10^{-3}M*250.mL}{425.mL} \\\\M_2=2.75x10^{-3}M[/tex]

Best regards.

If you dilute the cough syrup by adding 175 mL of water to a 250 mL sample of the cough syrup, the final concentration would be 0.00275 M

Using a simple dilution equation:

number of moles before dilution = number of moles after dilution

Recall that: number of moles = molarity x volume (MV)

Thus:

  M1V1 = M2V2

In this case, M1 = 4.68 x 10-3 M, M2 = ? V1 = 250 mL, and V2 = 425 mL

M2 = 4.68 x 10^-3 x 250/425

                  = 0.00275 M

                    = 0.00275 M

More on dilution principle can be found here: https://brainly.com/question/13844449

In two to three sentences, explain the trend for atomic size. Why does this trend occur?

Answers

Answer:

The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase. 2) As you move across a period, atomic radius decreases.

Explanation:

What ingredients can be alternative for cornstarch?

Answers

Answer:

their are many alternative for cornstarch.But I know only 10 of them and they are:

1.Rice Flour

2.wheat Flour

3.Potato Starch

4.Arrowroot

5.Tapioca

6.Ground Flaxseeds

7.Gaur Gum

8.Xanthan Gum

9.Glucomannan

10.Xanthan Gum

Which changes MUST happen for elements to become a compound

Answers

Answer:

Chemical changes in compounds happen when chemical bonds are created or destroyed. Then the molecular structure changes; new molecules form and a new substance is created. Often heat is used to begin a chemical change, as when baking a cake. Another example of a chemical reaction is the rusting of a metal trash can.

Hope this helps you Do mark as brainliest ✌️

An element is constituted of only atoms and no other entities are present in it. Whereas a chemical compound is a substance made up of various identical molecules of the same or different atoms.

The atoms of the same or different species bond together to form a compound.

Chemical bonding is present among them that cannot be simply separated.

The compounds can have ionic, covalent and hydrogen bonds present in them.

When the new atoms combine the structure changes of the new molecule formed.

To learn more about compounds and atoms follow the link:

https://brainly.com/question/2481039

How would you expect a positive particle approaching another positive particle to behave?

Answers

Answer:

They would produce a repulsive force to another

Explanation:

A positive particle approaching another positive particle will repulse it.

According to coulomb's law "like charges repel one another and unlike charges attract".

A charge is an intrinsic property of any matter.

When like charges e.g positive and positive or negative and negative charges are in the vicinity of one another, they repel each other.

When unlike charges; positive and negative are brought together, they simply attract one another.

Therefore, we expect that a positive particle approaching another positive particle will repel one another.  

When a positive particle approaches another positive particle, the two particles repel or move away from each other.

In electrostatics we know that like charges repel while unlike charges attract. Therefore when we have two like charges, they simply move away from each other. This is known as repulsion of charges.

Hence, two positive charges approaching each other will simply move away and repel each other according to the laws of electrostatics.

Learn more: https://brainly.com/question/1340584

the density of a wooden block that has a volume of 5 cm3 & a mass of 30.5 g

Formula: ____________
Mass = ____
Volume = ____
Density = ____

Answers

Answer:

The answer is 6.10 g/cm³

Explanation:

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

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 30.5 g

volume = 5 cm³

We have

[tex]density = \frac{30.5}{5} \\ [/tex]

We have the final answer as

6.10 g/cm³

Hope this helps you

A sample of ammonia gas has a volume of 3213 mL at 11°C and a pressure of 822 torr. What will the volume of the gas be in liters if the
moles of gas and the temperature do not change but the pressure changes to 2.33 atm?

Answers

Answer:

We are given:

v1 = 3.2 L                   v2 = x L

p1 = 822 torr OR 1.08 atm        p2 = 2.33 atm

t1 = t2 = 284 k

From the Ideal gas equation:

PV = nRT

Since the number of moles (n), universal gas constant (R) and Temperature (T) are constant

PV = k      (where k is a constant)

it can also be written as:

P1V1 = k --------------------------(1)

Similarly,

P2V2 = k (where k is the same constant as before)----------(2)

Solving for V2:

From (1) and (2):

P1V1 = P2V2

Replacing the variables

1.08 * 3.2 = 2.33 * x

x = (1.08 * 3.2)/2.33

x = 1.5 L (approx)

Therefore, the final volume of the solution will be 1.5L

Which of the following molecules has a trigonal pyramidal shape?
CO
Ni ---CO
A.
СО
OBCI-S c
Xeo
O.
O C.
0-N

Answers

Answer:

Xeo

Explanation:

A is the molecules with the trigonal pyramid shape

Which element in period 5 has the largest atomic radil

Answers

Answer:

francium is the answer

Explanation:

It should be noted that the element in period 5 has the largest atomic radius is Francium.

What is an atomic radius?

It should be noted that an atomic radius simply means the measure of the size of the atom from the center of the nucleus.

In this case, the element in period 5 has the largest atomic radius is Francium while Helium has the smallest radius.

Learn more about atomic radius on:

https://brainly.com/question/15255548

HELP PLEASE
Describe and illustrate how liquids are different then the other states of matter.

Answers

Explanation:

There are four natural states of matter: Solids, liquids, gases and plasma. ... Solids also have a high density, meaning that the particles are tightly packed together. Liquids. In a liquid, the particles are more loosely packed than in a solid and are able to flow around each other, giving the liquid an indefinite shape.

D 14 3
N
7
What is the number of protons, neutrons, and electrons?

Answers

Answer:

14

Explanation:

For example, silicon has 14 protons and 14 neutrons. Its atomic number is 14 and its atomic mass is 28. The most common isotope of uranium has 92 protons and 146 neutrons. Its atomic number is 92 and its atomic mass is 238 (92 + 146).

297.85
Question 2
4 pts
If a sample of gas occupies 23.5 mL at 315 K and 14.8 atm of pressure, what volume will it occupy at 415 K and
12.3 atm?
Give your volume in ml, but do not include the units in the answer. Do not use scientific notation.
Question 3
4 pts

Answers

Answer:

37.25

Explanation:

[tex]P_1[/tex] = Initial pressure = [tex]14.8\ \text{atm}[/tex]

[tex]P_2[/tex] = Final pressure = [tex]12.3\ \text{atm}[/tex]

[tex]V_1[/tex] = Initial volume = [tex]23.5\ \text{mL}[/tex]

[tex]V_2[/tex] = Final volume

[tex]T_1[/tex] = Initial temperature = [tex]315\ \text{K}[/tex]

[tex]T_2[/tex] = Final temperature = [tex]415\ \text{K}[/tex]

From ideal gas law we have

[tex]PV=nRT[/tex]

[tex]\Rightarrow PV\propto \dfrac{1}{T}[/tex]

So

[tex]\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}\\\Rightarrow V_2=\dfrac{P_1V_1T_2}{T_1P_2}\\\Rightarrow V_2=\dfrac{14.8\times 23.5\times 415}{315\times 12.3}\\\Rightarrow V_2=37.25\ \text{mL}[/tex]

The final volume is [tex]37.25\ \text{mL}[/tex]

A chef fills a 60 mL container with 52.2 g of cooking oil. What is the density of the oil?

Answers

Answer:

The answer is 0.87 g/mL

Explanation:

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

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{52.2}{60} \\ [/tex]

We have the final answer as

0.87 g/mL

Hope this helps you

How many total hydrogen atoms are in CH3OOH?​

Answers

Answer:

4

Explanation:

In CH3OOH, there is H3, which means 3 hydrogen atoms, but there is also an H at the end, which means another hydrogen atom.

3 + 1 = 4

Releases sugar (glucose) into the blood stream to power cells A. Brain B. Heart C. Liver D. Stomach and intestines​

Answers

Answer:

C Liver

Explanation:

please help me i don’t know the answer to this!!!!!!

Answers

Answer: Lithium and Ethanol

Explanation: As lithium and ethanol both have a density of under

1.000g/ml, they can be supported by the water. Blood and Magnesium are denser than the water and will therefore sink as the water can not support it them.

A molecule that has a linear shape has two electron domains around the central atom. How
many lone pairs of electrons are present around the central atom?
A. zero
B. one
C. two
D. three

Answers

Answer:

C I think.

Explanation:

Sorry if it's wrong :(

A) zero
hope this helps x
can i have brainliest plz x

The water cycle would not be possible without ______ and ________.

Options
1. evaporation; condensation
2.gravity; sun
3.precipitation; rain
4.gravity; precipitation

Answers

Answer:

I think it's 4

Explanation:

but I don't really remember the water cycle

What is the function of the esophagus?

Answers

The esophagus functions primarily as a transport tube that directs the progression of food and fluids from the mouth to the stomach.

The function of the esophagus is to help with food consumption (correct me if I’m wrong)

what is the formula for zinc sulfide

Answers

Answer:

the formula for zinc sulfide is b. ZnS

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similarities between the ecomienda and slavery in the Spanish colonies What where The three most important beliefs of the early United States Which statement is true about heat and light energy?A Heat and light energy always move from colder objects to warmer ones.B Heat energy moves in many different directions and light energy moves in only one direction.C Objects do not produce both heat energy and light energy.D Some objects can absorb both heat energy and light energy. {(0, -8), (5, 3), (-4, 3), (9, 2)}Given the following relation, which of the following sets below represent the Domain?A.{-4, 0, 5, 9)B. {-8, 2, 3}C. (1,2,3)D.{-8,-4, 0, 2, 3, 5, 9} Use the terms carbon dioxide, nitrates, phosphates, sulfates, and water to complete the chart that describes the inorganic compounds that provide most of the main elements of life to plants. Please help! I linked it to this question According to the Seventh Amendment, people who sue companies for not paying them are guaranteedpayment for their work.representation by lawyers.trials by jury.double jeopardy. DEACBFor this lab, you will find the area of an irregularly shaped room with the shape as shown above.Ask the user to enter the values for sides A, B, C, D, and E and print out the total room area.Remember the formula for finding the area of a rectangle is length width and the area of a right triangle is 0.5 * the base" heighPlease note the final area should be in decimal format.Sample RunEnter side A: 11Enter side B: 2Enter side C: 4Enter side D: 7Enter side E: 1Sample OutputRoom Area: 53.5 6.4 x 10 to the power of 17 Read James Weldon Johnsons poem Lift Every Voice and Sing and the excerpts from Shakespeares Julius Caesar carefully. Note any connotative language, figurative language, or repetition as you analyze the texts. Remember that youre answering this question in your argument: How do the texts develop the ideas of liberty or democracy? Then, use the table to outline your literary argument. Rotate (1,4) 90 degrees clockwise.ANSWER FAST PLZZ! will give brainliest Diep is saving money so he can buy a used car in 12 months . The total cost of the car he wants is $1450. Diep determines that he needs to save $120 each month to be able to afford the car what error did diep make claim for Of mice of men Your childcare center director wants to offer children a bigger variety of foods. What advice would you give her about how to offer a bigger variety of foods? how many sixteenths are there in 7/8 what is the answer? A minor league baseball office sells admission tickets for $5.75 for Wednesday night games. The ticketoffice can sell a maximum of 500 tickets. The function M(t) = 5.75t represents the amount of money(M) the ticket office brings in on Wednesday nights, where t is the number of tickets sold. Which bestdescribes the domain of M(t) in this context? can some one help me please ?ill give the most brainlyest Is the following 4/4 measure analyze and labled correctly How did the renaissance affect culture in Europe