Chemistry High School

An unknown metal has a density of 10.51 g/ml and a mass of 287.8 g. What is the
unknown metal's volume?

An Unknown Metal Has A Density Of 10.51 G/ml And A Mass Of 287.8 G. What Is Theunknown Metal's Volume?

Answers

Answer 1

Answer:

27.3834443387 so B

Explanation:

M/D=V

287.8/10.51=V

V=27.3834443387

Answer 2

Answer:

27.38

Explanation:

287.8 Divided by 10.51 = 27.38

Please mark brainliest if helped

Related Questions

a person who has non-functional cone type won't be able to identify the_____________of
fill in the blank.
A.color
B. shape
C. size​

Answers

Answer:

A

Explanation:

more domunit

Compounds are created when atoms of different elements _____.

1.form chemical bonds
2.have different chemical properties
3.form physical bonds
4.have similar chemical properties

Answers

Answer:

1.form chemical bonds

explain how to balance the chemical equation, KClO3 ⟶ KCl + O2 and include all steps

Answers

The balance of chemical equation : 2KClO₃ ⟶ 2KCl + 3O₂

Further explanation  

Equalization (balance) of chemical reactions can be done using variables. Steps in equalizing the reaction equation:  

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.  2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product  3. Select the coefficient of the substance with the most complex chemical formula equal to 1  

Reaction

[tex]\tt KClO_3\Rightarrow KCl+O_2[/tex]

1. Coefficient

KClO₃ ⟶ aKCl + bO₂

2. Equation

K ⇒ left =1, right=a ⇒a=1

Cl⇒ left =1, right=a ⇒a=1

O ⇒ left = 3, right = 2b ⇒3=2b, b = 1.5

The equation turns into :

KClO₃ ⟶ KCl + 1.5O₂

multiplied by 2

2KClO₃ ⟶ 2KCl + 3O₂

What element is the only Noble Gas in the s-block?

Answers

Answer:

Helium

Explanation:

Answer:

helium i guess i m not sure

The rows in the periodic table are called periods.
What is true about elements in the same period?

Answers

Answer:

elements in the same period have the same number of shells

the period number the element is in, that is the number of shells it has.

Describe how the particle motion is different from state to state.

Answers

Answer:

The particles in a gas are moving very quickly in random directions.

The particles in a solid are tightly packed and locked in place, and they are vibrating in their place.

The particles in a liquid are close together (touching) but they are able to move/slide/flow past each other.

brainliet please?

x

1 point
Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?

Answers

Explanation:

Nitrogen-14 is the most abundant isotopes of Nitrogen.

Please answer correctly !!!!!!!! Will mark brainliest !!!!!!!!!!!!!!

Answers

Answer: uuhhhh pass

Explanation:

Answer:

It should be 0.8mL.

Explanation: Because you would subtract what the rock would be without the water.

[tex]5.6-4.8=0.8[/tex]  Simple C:

Which cell organelle controls the activities for the cell?

Answers

Answer:

[tex]the \: nucleus \:[/tex]

Explanation:

[tex]the \: nucleus \: is \: organelle \: that \: controls \\ \:a ll \: cellular \: activities.[/tex]

Which of the following is NOT a characteristic of a compound?
A. has different properties from the elements that formed it
B. pure substance made of two or more elements
C. can be represented by a chemical formula
D. different samples have different properties

Answers

Answer:

I think it's D

sorry if I'm wrong.

Explanation:

Options that are not characteristics of compound in the question is D. different samples have different properties.

A compound can be regarded as a substance which is formed by chemical  combination of two or more elements.Examples of compound are water ( H2O), Sodium chloride ( NaCl)

Some of the properties of a compound are;

A compound will always has a different properties which is different from the properties of each of the elements making up the compound.A compound are formed as a result of  two or more elements that combined chemically.A compound can be identified with its chemical formula.

Therefore, option D is correct because a compound will only has its own properties not that

Learn more at : https://brainly.com/question/13516179?referrer=searchResults

Find the percent of oxygen in CaClO3)2 Show your work

Answers

So in calcium chlorate, there is one calcium, 2 chlorines, and 6 oxygens. To find the percent of oxygen in the compound, find the weight of the oxygen and divide it by the total weight of the compound:

weight of oxygen (95.94g/mol) / weight of entire compound (206.98g/mol)
= 0.4635

Finally, to convert this to a percentage you multiply it by 100

0.4635 x 100 = 46.35% Oxygen by mass

A star's mass determines the —
A) shape of a Star
B) location of a star
C) length of its lifecycle
D) galaxy it belongs to

Answers

It’s either A or C sorry I can’t help more

If a sample of copper is 215g, how many moles of copper atoms are in the sample?

Answers

Answer:

3.38 moles.

Explanation:

The following data were obtained from the question:

Mass of copper (Cu) = 215 g

Number of mole of copper (Cu) =...?

The number of mole of copper (Cu) in 215 g can be obtained as follow:

Mass of copper (Cu) = 215 g

Molar mass of copper (Cu) = 63.55 g/mol

Number of mole of copper (Cu) =...?

Mole = mass /Molar mass

Mole of Cu = 215/63.55

Mole of Cu = 3.38 moles

Therefore, 3.38 moles of copper (Cu) is present in the sample.

K+ Cl2 → КСІ balance equation​

Answers

Answer: 2K + Cl2 —> 2KCl

3. compounds in which elements are held together by covalent bonds...keeps their own properties
A polar molecule
B. element
C. compound
D. molecule

Answers

The anserr is c that what i think

how long will take an object traveling at 25 m/s to reach a distance of 125 meters? ​

Answers

Answer:

5s

Explanation:

the number of protons will tell you what elements it is. T or F plzz help​

Answers

Answer:

True

Explanation:

There are two ways to tell elements apart from each other: the atomic number or the number of protons. The atomic number tells the number of protons in the element.

For example:

There are two given elements. One has 3 protons and an atomic number of 3 while the other has 7 protons and an atomic number of 7. Which one is Lithium?

Lithium has an atomic number of 3, which means it has three protons, which means Lithium is the one with 3 protons.

Why were enslaved Africans in high demand in the southern colonies?

Answers

Answer:

Slaves were in high demand in the southern colonies because they were the main source of labor. ... Bacon and others colonists wanted to take the Natives land.

Explanation:

HOPE THIS HELPED ❤✨

Slaves were in high demand because they were the main source of labor meaning they would do all of their owners work and without the slaves it was hard for them to keep up with their house, farm, work etc

Hi I really need help

Answers

The first one is the answer

Answer:

A

Explanation:

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FLINE JE PELENE BI
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SELFS EEE
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Answers

ososlwkwkwlwkemmwmwmwwmkwkwmw

Answer:

WOWKFBBAI9AIEHEBFKCOAKQQ

The kinetic energy of a moving object depends on its mass and its
a. volume.
b. velocity.
c. distance.
d. acceleration.

Answers

I think the answer is a, volume, but I still might be wrong.
It’s the volume of the object

Which can change from one state of matter to another at the temperatures and pressures experienced at Earth’s surface?
oxygen

carbon dioxide

water

nitrogen

Answers

The answer is for that will be Water

What volume of silver metal will weigh exactly 2500g. The density of silver is 10,5 g/cubic centimeters.

Answers

Answer:

26250 cubic centimeters

Explanation:

What happens if an organism cannot carry out its life function?

Answers

Answer:

organisms cannot stay with out getting nutrients as they will not be able to repair them selves or produce energy.

Explanation:

What is the frequency of an event?
Group of answer choices

Probability

Degree

Expected occurrence

Identification

Answers

the answer is probability!

hope this helps :)

Answer:

Probability

Explanation:

Which symbol and unit of measurement are used for resistance?
symbol: R: unit :
symbol: 0; unit: R
symbol: R: unit o
symbol: R: unit R

Answers

Answer:

Unit of resistance is Ω (Omega).

Explanation:

The ability to measure the oppose the flow of electric current is called resistance of a circuit. Its relation with voltage and current is given by Ohm's law as follows :

V = IR

R is resistance

Its unit is Omega and it is represented by Ω.

The unit of the electrical resistance is ohm Ω

The symbol of resistance is R.

Hence Option A) Symbol: R, Unit : Ω is the correct answer

What is resistance?

Resistance is simply the measure of the opposition to current flow in an electrical circuit.

Ohm’s law states that the potential difference between two points is directly proportional to the current flowing through the resistance.

V = I × R

Where;

V is the voltage or potential difference. I is the current.R is the resistance.

The unit of the electrical resistance is ohm Ω

The symbol of resistance is R.

Hence Option A) Symbol: R, Unit : Ω is the correct answer

Learn more about Ohm’s law here: brainly.com/question/2364325

#SPJ5

organize the following elements in order of increasing atomic radius (Ge, He, Sr, O, Ba)

Answers

Answer:

He

O

Ge

Sr

Ba

Explanation:

An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements.

In general, the size of an atom will decrease as you move from left to the right of a certain period.

What mass of ethanol will All
a 250.0 ml container if its
density is 0.789 g/ml?

Answers

Answer:

The answer is 197.25 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume = 250 mL

density = 0.789 g/ml

So we have

mass = 250 × 0.789

We have the final answer as

197.25 g

Hope this helps you

What all indicates a CHEMICAL change? *
A Solid melting into a liquid
After the change the substance is still reactive with oxygen
One substance becomes two new substances
The melting point was 100 deg C but after the change the melting point was 256 deg
C.

Answers

one substance becomes two new substances

If a football is 625 mL volume and 0.64 g/mL density what is the mass

Answers

the mass is 400

explanation

the formula for density is density equals mass divided by volume so you plug in .64 for the density and 625 for the volume. .64= m/625. to solve for mass you would multiply both sides by 625 to get the mass
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