A graduated cylinder contains 20.0 mL of water. An irregularly shaped object is placed in
the cylinder, and the water level rises to the 31.2-mL mark. If the object has a mass of
80.4 g, what is its density?

Answers

Answer 1

Answer:

7.17 g/mL

Explanation:

Density = Mass / Volume

Given mass of object : 80.4g

We are not given the objects volume, however we are given that when put inside of a container with 20.0mL water, the level of the water rises to 31.2 mL.

31.2 - 20 = 11.2

The water level rose 11.2 mL when the object was placed inside of the cylinder containing the water therefore the object has a volume of 11.2mL

Now to find it's density

recall that density = mass / volume

mass = 80.4 and volume = 11.2mL

so density = 80.4/11.2 = 7.17 g/mL


Related Questions

can someone please answer this question for me? i will mark brainliest and it would also be really appreciated! :)


During an experiment water was heated in a container covered with a glass lid. The following observations were recorded.
Observation 1: Water droplets form on the inside of the glass lid.
Observation 2: Bubbles rise as the water starts boiling.
Based on the observation, justify the type of change (physical or chemical) that took place. (4 points)

Answers

Based on the observations, the change is physical.

This is because the matter is still the same composition after the change, while a chemical change would change the composition.

Based on the observations, both physical and chemical changes have occurred during the experiment.

Observation 1: Water droplets form on the inside of the glass lid. This is a physical change.

Observation 2: Bubbles rise as the water starts boiling. This is a chemical change.

A physical change is a transformation in a substance's state, shape, or form that does not alter its chemical composition or create new substances. During a physical change, the original substance remains the same, and no chemical bonds are broken or formed.

A chemical change, also known as a chemical reaction, involves the conversion of one or more substances into new substances with different chemical compositions. Evidence of a chemical change includes the production of gas, formation of a precipitate, release or absorption of heat or light, and changes in color and odor.

In observation 1, the water vapor in the air comes into contact with the cooler glass surface of the lid and condenses back into liquid water. Condensation is a physical change where a gas changes into a liquid.

Observation 2- Boiling is the process of converting liquid water into water vapor (gas) by absorbing heat energy. The heat causes water molecules to gain energy and transform into gas, forming bubbles that rise to the surface. This change involves the breaking of intermolecular forces between water molecules and is a chemical change.

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Sound travel at a velocity of 333 m/s. How long does it take for sound to travel the length of a 100.0 yard football field
(1 inch = 2.54 cm)

Answers

Answer:

It takes 0.27 second to travel the distance of  100 yard

Explanation:

We can use the formula ( t = d / s )t = d / s  = 91 m / 333 m/s  = 0.27 s

In order for rollercoaster to work, why does the hill the cart climbs need to be higher than the top of the loop?

Answers

For momentum purposes. The roller coaster needs to be going fast enough to make it all the way around the loop without being assisted by the tracks

Answer:

"At the top of the first and tallest hill, your potential energy is at its highest it will ever be on this ride. As you begin to descend, your potential energy decreases until it's all gone at the bottom of the hill." The shorter the hill the roller coaster climbs, the greater its kinetic energy.

What quantity in moles of LiBr are in 66.1 grams of LiBr?

Answers

Molar mass of LiBr

7+80=87g/mol

[tex]\\ \sf\hookrightarrow No\:of\;moles=\dfrac{Given\:mass}{Molar\:mass}[/tex]

[tex]\\ \sf\hookrightarrow No\:of\:moles=\dfrac{66.1}{87}[/tex]

[tex]\\ \sf\hookrightarrow No\:of\:moles=0.75mol[/tex]

Which nitrogen bases are needed to complete the DNA strand pictured below? Give your answer in order from top to bottom.


cytosine, thymine, cytosine, guanine


cytosine, thymine, guanine, guanine


thymine, cytosine, thymine, adenine


adenine, cytosine, adenine, guanine

Answers

Answer: Cytosine, Thymine, Cytosine, Guanine (option A)

Explanation:

In DNA strands, you must use base-pairing rules to complete strands.

The base-pairing rules are:

Adenine (A) bonds with Thymine (T)

Guanine (G) bonds with Cytosine (C)

By using these rules, you can pair the sequence GAGC with CTCG

The sequence CTCG is also represented as the bases Cytosine, Thymine, Cytosine, and Guanine, making A the correct answer.

I hope this helps!

The optimum drinking temperature for a Shiraz is 15.0 ∘C . A certain bottle of Shiraz having a heat capacity of 3.40 kJ∘C−1 is 23.1 ∘C at room temperature. The heat of fusion of ice is 6.02 kJmol−1 and the heat capacity of ice is 2.108 Jg−1∘C−1. Assume that no heat is lost to the rest of the surroundings. What minimum mass of ice, originally at -5.0 ∘C , is required to bring the final temperature to 15.0 ∘C ?

Answers

We have that the  minimum mass of ice , required to bring the final temperature to 15.0 ∘C is mathematical given as

m=67.9g

From the question we are told

The optimum drinking temperature for a Shiraz is 15.0 ∘C . A certain bottle of Shiraz having a heat capacity of 3.40 kJ∘C−1 is 23.1 ∘C at room temperature. The heat of fusion of ice is 6.02 kJmol−1 and the heat capacity of ice is 2.108 Jg−1∘C−1.

Heat released

Generally the equation for the Heat released   is mathematically given as

Q=cDT

Q=3.4*8.1*10^3

Q=27540J

Therefore

Heat absorded

H=m*4*2.108+m/18*6.02*10^3+m*15*4.18

H=405.58mJ

THerefore

[tex]m=\frac{27540J}{405.58}[/tex]

m=67.9g

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Crystals most often form in igneous and metamorphic rocks. According to the rock cycle, which processes and features do these rocks share that likely promote the formation of crystals?

Answers

The features that are shared by the rocks include the melting and cooling of rocks.

What is a rock?

It should be noted that a rock simply means a relatively hard naturally occurring mineral material.

Crystals most often form in igneous and metamorphic rocks. The processes that these rocks share that likely promote the formation of crystals is the melting and cooling of rocks.

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Can someone help with this, i’m getting lost in the steps. Like I start off right (i think) then it just gets confusing.

Answers

Answer:

28.12 kg

Explanation:

Here we are given that the density of copper is 8.92 g/ cm³ .

[tex]\sf \longrightarrow \rho_{(copper)}= 8.92 g/cm^3\\ [/tex]

And we are interested in finding out the mass of the given block . The dimensions of the block is 0.052m × 311mm × 19.5 cm .

Firstly find out the volume in cm³ as the density is in cm³ .

[tex]\sf \longrightarrow Volume_{cuboid}= length * breadth * height \\ [/tex]

1cm = 0.01 m 1cm = 10mm

[tex]\sf \longrightarrow Volume = (0.052)(100) * (311\div 10) *(19.5) cm^3 \\ [/tex]

[tex]\sf \longrightarrow Volume = 5.2 * 31.1 * 19.5 cm^3 \\ [/tex]

[tex]\sf \longrightarrow Volume = 3153.54 cm^3\\ [/tex]

Now we may use Unitary Method to find out the mass of the block as ,

Mass of 1cm³ of copper is 8.92 g .

Mass of 3153.54 cm³ of copper will be 8.92*3153.54 g = 28129.57 g

And we know that 1kg = 1000g , so

[tex]\sf \longrightarrow \underline{\boxed{\bf Mass_{Cu}= 28.12 \ kg }} \\ [/tex]

yourown definition of molecular
polarity

Answers

Answer:

Polarity is caused by the difference in electronegativity (EN) of a compound. For example, water, H2O, is polar because oxygen's EN is much higher than hydrogens. Therefore, the electrons spend more time around the oxygen and less time around the hydrogen causing a slightly positive pole at the hydrogens and a slightly negative at the oxygen. Most polar molecules are not symmetrical (like water). Non-polar molecules like CH4 (methane) do not have poles.

Hope that helps

How is a covalent bond formed between two atoms?

Answers

Answer:

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

Explanation:

This is a diagram of fossils found in the same area. Jamie wanted to know which layer of fossils is the oldest, so he
asked his mom. Which layer of fossils did Jamie's mom tell him was the oldest?
A)
Layer 1
B)
Layer 2
C)
Layer 3
D)
Layer 4

Answers

Answer:

D

Explanation:

The bottommost layer is always the oldest.

If 550 mL of a 3.50 M KCl solution are set aside and alowed to evaporate unti the
volume of the solution is 275 ml, what will the molarity of the solution be?

Answers

1) list givens and convert if necessary

C₁ = 3.50 mol/L

V₁ = 0.550 L

C₂ = ?

V₂ = 0.275 L

2) rearrange formula

[tex]C_{1}V_{1}=C_{2}V_{2}\\\\C_{2}=\frac{C_{1}V_{1}}{V_{2}}[/tex]

3) solve

[tex]C_{2}=\frac{(3.50\ mol/L)(0.550\ L)}{(0.275\ L)}[/tex]

C₂ = 7.00 mol/L

name any two metals having high density​

Answers

Answer:

Aluminium

Potassium

Answer: Hydrogen

Sodium Magnesium Aluminium

Potassium Calcium Gallium

Rubidium Strontium Indium

Caesium Barium Thallium

Explanation:

How are atoms related to balancing a chemical equation?

Answers

Atoms are related to balancing equations because the amount of atoms on the left of the equation (reactants) needs to be the same amount on the right (products).

For example, 2H₂ + O₂ → 2H₂O

If you count the amount of hydrogen atoms on both sides each, there would be 4 (make sure to multiply the coefficient by the subscripts).

If you count the amount of oxygen atoms on both sides each, there will be 2 of them (2 in a molecule of oxygen)

I hope this helps and please mark me as brainliest!

Magnesium reacts with iron chloride solution.

3 Mg + 2 FeCl3 ⟶ 2 Fe + 3 MgCl2

0.120 g of magnesium reacts with excess iron chloride solution.

Relative atomic masses (Ar): Mg = 24 Fe = 56


Calculate the mass of iron produced, in mg
Show your working.

Answers

Answer:

0.1876g

Explanation:

Since iron is in excess, therefore Magnesium is the limiting reactant.

Moles of Mg = mass/molar mass

0.120/24 = 0.005 moles

Compare the coefficient ratio of Mg and iron.

Ratio is 3 : 2

To find moles of iron we take 2/3 x 0.005

Moles of iron is 0.00335 moles

Mass = moles x molar mass

= 0.00335 x 56

= 0.1876g

Taking into account the reaction stoichiometry, 0.186 grams of Fe are produced when 0.120 g of magnesium reacts with excess iron chloride solution.

Reaction stoichiometry

In first place, the balanced reaction is:

3 Mg+ 2 FeCl₃  → 2 Fe+ 3 MgCl₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Mg: 3 molesFeCl₃: 2 moles   Fe: 2 molesMgCl₂: 3 moles

The molar mass of the compounds is:

Mg: 24 g/moleFeCl₃: 162.35 g/moleFe: 56 g/moleMgCl₂: 94.9 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Mg: 3 moles ×24 g/mole= 72 gramsFeCl₃: 2 moles ×162.35 g/mole= 324.7 gramsFe: 2 moles ×56 g/mole= 112 gramsMgCl₂: 3 moles ×94.9 g/mole= 284.7 grams

Mass of iron produced

The following rule of three can be applied: if by reaction stoichiometry 72 grams of Mg form 112 grams of Fe, 0.120 grams of Mg form how much mass of Fe?

[tex]mass of Fe=\frac{0.120 grams of Mgx112 grams of Fe}{72 grams of Mg}[/tex]

mass of Fe= 0.186 grams

Then, 0.186 grams of Fe are produced when 0.120 g of magnesium reacts with excess iron chloride solution.

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I have a container of gas at a pressure of 2.4 atm and a temperature of 343 K with a moveable piston and a small opening that has an initial volume of 36 liters. If I raise the pressure to 4.1 atm, decrease the temperature to 313 K, and measure the final volume to be 51 liters, what is the final number of moles present inside the container if the container held 3.7 moles to begin with? Give your answer in 2 decimals places.

Answers

Answer: RAWRR

Explanation:RAWRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR

[tex]\bold{Choose \: the \: correct \: Answer :D\: }[/tex]​

Answers

Answer:

Option B is correct.

Explanation:

Distance refers to the distance traveled by a body.

Hope it will help you.

hey guys pls answer this question

Answers

Answer:3. B 4. C

Explanation:

Answer:

Explanation: have a nice day

SOMEONE HELP NO LINKS PLZ answer Questions 1–6 based on Figure 1.


1. How many protons are shown? _____________________________________

2. In the periodic table, elements are ordered by atomic number, the number of protons in an atom’s nucleus. Using the periodic table in your textbook, identify the element shown. ________________________________________

3. How many electrons are shown? ____________________________________

4. How many electrons are in the outermost energy level? _____

5. If the number of electrons equals the number of protons, then there is no charge, and the model shows a neutral atom. If the numbers are not equal, then you have an ion. Use this reasoning to determine if Figure 1 shows an ion or a neutral atom. _______________________________

To determine a particle’s charge, you must compare the number of protons with the number of electrons. Use the spaces to the right to subtract the number of electrons from the number of protons. (Remember, if the number of electrons is greater than the number of protons, the charge will be negative.)

Answers

Answer:

element argon, protons 18 , electrons 18 , outer most energy level 8

An atom has 6 electrons in its outer orbit. It will most likely form an ion with a charge of:
(a) 6-
(b) 6+
(c) 2-
(d) 2+

Answers

Answer:

c

Explanation:

A student reads the volume in a buret as 7.89 ml. The teacher checks the buret, and the actual value for the volume is 7.77 ml. What is the student's percent error?

Answers

Answer:

1.54%

Explanation:

Percent error is found as finding the value of measured value versus actual value, dividing it by the actual value written in absolute notation (percent error, the accuracy of the measured value cannot be negative) times 100 to find it as percent.

This is how we express it as a formula:

[tex]percent~error=\frac{|measured-actual|}{actual} * 100%[/tex]

Plugging in the numbers means we have to understand what goes where. Measured value is what the student measured, and the actual value is the correct answer.

Given this information,

[tex]percent~error=\frac{|7.89-7.77|}{7.77} * 100\\percent~error=\frac{|0.12|}{7.77} *100\\percent~error=0.015444*100\\percent~error=1.54%[/tex]

Found of to three significant figures 35.7823 m

Answers

[tex]\\ \tt\bull\rightarrowtail 35.7823[/tex]

Round one by one

[tex]\\ \tt\bull\rightarrowtail 35.782[/tex]

[tex]\\ \tt\bull\rightarrowtail 35.78[/tex]

[tex]\\ \tt\bull\rightarrowtail 35.8[/tex]

Done

If the reaction 2HgO --> 2Hg + O2 is endothermic, which bonds are the strongest?

The bonds between Hg atoms in the solid metal.
The bond between Hg & O.
The bond between O & O.

Answers

Endothermic reaction means the reactant side takes heat from surrounding and get decomposed i.e ∆H=-veIf the equation is exothermic then it means the reactant is happy to decompose .But it's not as it's endothermic

Now

HgO is Omitted from our solution option.

Hg is a atom so no bonds hence no bond strength occurs.

O_2 is a molecule and so it's our answer .

4. How many feet are in 3.45 km?

Answers

Answer:

11318 feet and 10.771 inches

Explanation:

there is 3280.84 in one Km

just do 3280.84x3.45

Explain the relationship between the speed of atoms and the state of matter of a substance

Answers

Answer:

The faster the molecules of a substance move, the higher the kinetic energy, and the higher the temperature. The slower the molecules move, the lower the kinetic energy, and the lower the temperature.

Which of the following examples describes a publicly held corporation?(1 point)

A local gaming cafe is owned and operated by the same group of friends that founded it years ago. Nobody holds stock in the gaming cafe.
A local gaming cafe is owned and operated by the same group of friends that founded it years ago. Nobody holds stock in the gaming cafe.

A local jewelry store is owned by its founders who hold but do not sell shares in the company.
A local jewelry store is owned by its founders who hold but do not sell shares in the company.

A nation-wide fast-food chain is owned and operated by the same family that founded it. Nobody holds stock in the fast-food chain.
A nation-wide fast-food chain is owned and operated by the same family that founded it. Nobody holds stock in the fast-food chain.

A small restaurant chain, founded and operated by a single family, is owned by shareholders who purchase their shares on the stock exchange.

Answers

Answer:

A small restaurant chain, founded and operated by a single family, is owned by shareholders whi purchase their shares on the stock exchange.

Explanation:

This is because publicaly help cop is usually ownership is zdetermined via shares of stovk

HOPE THIS HELPS

Which of the following are chemical
changes?
(a) Growth of a plant (b) Rusting of iron (c) Mixing of iron filings and sand (d) Cooking of food (e) Digestion of food (f) Freezing of water (g) Burning of a candle

Answers

Answer:

The chemical changes are as follows:

Explanation:

Growth of a plant Rusting of ironCooking of food Digestion of food Burning of a candle.

 

-TheUnknownScientist 72

Explanation:

a, b, d, e and g

hope it's helpful

what do uh mean by ionic or electrovalent bond ?

thankyou ~​

Answers

This is a type of bond present in electrovalent compounds.

What is Electrovalent Bond?

This is a type of bond that exist in electrovalent or ionic compounds. It is formed as a result of combination between a positive cation and a negative anion. This results in the transfer of electron from the cation to the anion. This type of bond in which there's a complete transfer of electrons between both parties occurs easily as a result of the electronegative difference between the combining atoms. Compounds that show this type of bonding are combination between group 1 or 2 elements with group 16 or 17 elements.

Compound formed through this bond are strong, mostly dissolves in polar solvents due to their polar charges and also conducts electricity.

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Which area is most likely closest to a salt marsh or an estuary?


A. A lake.


B. A prairie


C. A coastline


D. The mountains

Answers

Answer:

coastal area with very high tides deep ocean water miles from a river's mouth

Explanation:

Marshes are a type of wetland ecosystem where water covers the ground for long periods of time. Marshes are dominated by herbaceous plants, such as grasses, reeds, and sedges(National Geographic Society).

hope dis help

Which of the following is a sign a chemical reaction has occurred?

Answers

Answer: Color change, fizing, bubbling, whether it’s hot or cold.

Explanation:

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Pleaseee HELPP mee plzzzzzz The Hebrews originally migrated from __________. PLZ HELP ME WITH NUMBERS 5 AND 6ITS DUE TOMORROW!!!!!!!! Solve for x.2/5(x1/2)=2 3/4Enter your answer as a mixed number in simplest form by filling in the boxes.x = Select the correct answer. Which US president worked with civil rights leaders to secure equality and liberty? A. Ronald Reagan B. Franklin Roosevelt C. Woodrow Wilson D. Teddy Roosevelt E. Lyndon Johnson. Find the value of the variable in the parallelogram. Which statement best represents Roger Shermans argument in favor of equal representation in the Senate? ALGEBRA I PROBLEM!Use elimination to solve.3x-30=y7y-6=3xwill give brainliest tysm:) Why is it important to you to appreciate the music of the culture of south asia and middle east? work out length of ac using cosine rule You are gifted a laptop upon your graduation that cost $3200. The laptop depreciates at a rate of 18% per year. After your second year of college you want to sell the laptop. How much can you reasonably sell it for? Help Me Please Will Mark Brainliest The removal of both the left and right hippocampus will ultimately result in:_____. a. the inability to form non-declarative memories. b. the inability to recognize stimuli. c. the inability to form declarative memories. d. the inability to express emotions. Which rate is not equivalent to the others? What are the total positive charge and total negative charge in a solid copper penny that is electrically neutral Write a linear equation in Slope-Intercept Form that is parallel to a line containing the points: (2,7) and (4,11) A- y=-2x+9B- y= 2x-8C- y=-4x-9D- y=4x+3 8203 divided by 31 with remainder!!! Determine the value of the information in scientific notation. The moon is approximately 3. 63 108 meters from Earth. What is 3. 63 108 in standard notation?. PLEASE HELP THIS IS DUE IN THE NEXT FEW HOURS!!! HELP ASAP!!!Investigate the individuals that you described and write 3-5 sentences in English about their significance to French culture.I have selected Marion Cotillard and Celine Dion, but you have to write around 5 sentences each about their significance in French culture. [tex]4\left(5x-2\right)=2\left(9x+3\right)[/tex]