URGENT PLEASE ELPP!!!Calculate the density of a piece of metal that has a mass of 2.5 × 102 kg and a volume of 4.1 × 103 m3.

Answers

Answer 1

Answer:

Density =mass/Volume

First of all let's find the mass

= 2.5 ×102kg

= 225kg

Then the volume

=4.1 × 103 m3

=422.3m3

225kg /422.3m3

=0.53279659

Answer 2

The density of a piece of metal that has a mass of 2.5 × 102 kg and a volume of 4.1 × 103 m3  will be 6.03  kg/m³ .

What do you mean by  the density of a substance ?

Density is defined as the ratio of mass of the object to the volume of the object. Different substances have different densities.

The mathematical expression for density is as follows:

Density=Mass/Volume

The mass of a substance is expressed in kilograms and the volume is expressed in liter.

Thus, the unit of density is kg L⁻¹.

The density of a substance does not depend on the amount of the matter.

Thus, density is an intensive property.

To calculate  the density -:

Given,

Mass= 2.5 ×102 kg=2550 kg

Volume=4.1 × 103 m³=422.3m³

Density=mass/volume

Density=2550/422.3

Density=6.03kg/m³

Hence, 6.03kg/m³ is the  density of a piece of metal .

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Related Questions

are standard electrode potential and standard hydrogen potential same?​

Answers

Answer:

Potentials of any other electrodes are compared with that of the standard hydrogen electrode at the same temperature. Hydrogen electrode is based on the redox half cell: 2 H+(aq) + 2 e− → H2(g)..

Determine the grams of sodium chloride produced when 10 g of sodium react with 10 grams chlorine gas according to the equation 2Na + Cl2 = 2 NaCl

Answers

Answer:

16 g

Explanation:

Step 1: Write the balanced equation

2 Na + Cl₂ ⇒ 2 NaCl

Step 2: Identify the limiting reactant

The theoretical mass ratio (TMR) of Na to Cl₂ is 46:71 = 0.65:1.

The experimental mass ratio (EMR) of Na to Cl₂ is 10:10 = 1:1.

Since EMR > TMR, Cl₂ is the limiting reactant

Step 3: Calculate the mass of NaCl produced

The theoretical mass ratio of Cl₂ to NaCl is 71:117.

10 g Cl₂ × 117 g NaCl/71 g Cl₂ = 16 g NaCl

differentiate between Physical and chemical changes​

Answers

Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

I HOPE THIS WILL HELP YOU IF NOT THEN SORRY HAVE A GREAT DAY:)

Physical changes are things like rearranging your room, it may look different but the chemical makeup is the exact same as before. Chemical changes are what happens when wood is burnt to charcoal, or when you dissolve salt in water. Hope this helped!

The atomic mass of calcium is calculated by adding the mass (amount) of

A) Protons and Electrons
B) Protons and Neutons
C) Electrons and Neutons
D) Protons and Protons​

Answers

Answer:

B. Protons and Neutrons

Answer:

Option"B" is correct.

MARK ME BRAINLISTS

how can we separate the sugar from sugar solution​

Answers

The process of distillation

state boyl"s law and Charle's law​

Answers

Answer:

hey mateee

Boyle's law :-  the pressure (p) of a given quantity of gas varies inversely with its volume (v) at constant temperature.

Boyle's law can also be formularized as P1V1 = P2V2

Charle's law :-  the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature, if the pressure remains constant.

Charle's law can also be formularized as V1/T1 = V2/T2  

why are structural formulas good for depicting polymers?​

Answers

Answer:

Structur formulas are good for depicting polymers because they explain the properties and structure of the compound which empirical and molecular formulas cannot always represent.

Hope it helps you.

Structural formulas describe the bonds shared by the elemental atom. They are good for depicting polymers as they describe the structure and the properties.

What are polymers?

Polymers are said to be substances that are either natural or synthetic and are macromolecules made of various chains of monomers joined together.

The actual structure and arrangement of the atoms in the polymers are depicted by the structural formula. These were not explainable by the empirical, or molecular formulas.

The atoms involved and the linkage between them are described through the structures and allow us to know the certain properties of the monomers involved. It gives the idea of the chemical and physical properties.

Therefore, the structural formulas depict the polymer.

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What is the concentration of a solution formed by diluting 25.0 ml of a 3.8M glucose solution to 250ml

Answers

Explanation : số mol glucose 3.8M là :

n = Cm . V = 3.8 . 25 =95

=> Cm khi pha loãng = [tex]\frac{n}{V}[/tex] = [tex]\frac{95}{250}[/tex] = 0.38M

According to molar concentration, the  concentration of a solution formed by diluting 25.0 ml of a 3.8 M glucose solution to 250 ml is 0.38 M.

What is molar concentration?

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.In case of 2 solutions given it is calculated as M₁V₁=M₂V₂,on substitution, M₂=3.8×25/250=0.38 M.

Thus,  the  concentration of a solution formed by diluting 25.0 ml of a 3.8 M glucose solution to 250 ml is 0.38 M.

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2500m into kilometer​

Answers

Answer

1 meter = 1000 km

2500 meter = 2500/1000 km

= 2.5 km

why is unit of pressure called a derived unit ?? 2) how do you measure the volume of milk?

Answers

1. Unit of pressure called a derived unit because it is a combination of base units (kg·m^-1·s^·2).

2. We measure the volume of milk by a instrument called Milk Lactometer.

A car of 1200 kg is moving with a speed of 36 Km/hr. It is stopped by applying brakes withion with in 5 seconds. Calculate the amount of force required to stop the car.

Answers

Answer:

–2400 N

Explanation:

This is a physics question. However, the answer to the question is given below.

We'll begin by converting 36 Km/hr to m/s. This can be obtained as follow:

3.6 Km/hr = 1 m/s

Therefore,

36 Km/hr = 36 Km/hr × 1 m/s / 3.6 km/hr

36 Km/hr = 10 m/s

Thus, 36 Km/hr is equivalent 10 m/s.

Next, we shall determine the acceleration of the car. This can be obtained as follow:

Initial velocity (u) = 10 m/s

Final velocity (v) = 0 m/s

Time (t) = 5 s

Acceleration (a) =?

a = (v – u) / t

a = (0 – 10) / 5

a = – 10 / 5

a = –2 m/s²

Finally, we shall determine the force required to stop the car. This can be obtained as follow:

Mass (m) = 1200 Kg

Acceleration (a) = –2 m/s²

Force (F) =?

F = ma

F = 1200 × –2

F = –2400 N

NOTE: The negative sign indicate that the force is in opposite direction to the motion of the car.

what are the useful of carbon dioxide?​

Answers

Carbon Dioxide is used by green plants in photosynthesis .Carbon Dioxide is used in fire extinguisher to keep fire away .CARBON Dioxide is used to bake cakes ,Pasteries etc Extra shots:-

Carbon Dioxide is known as CO_2

What are isotopes_???​

Answers

Answer:

Below!

Explanation:

Isotopes are elements with a similar chemical makeup and the same atomic number, but a different atomic mass and number of neutrons . An example of this would be carbon-12, carbon-13, and carbon-14. Three isotopes of the element carbon that have the same 6 protons but have a different neutron count. A simple way to explain isotopes would be to say that they are just different "versions" of an element.

Hope this helps ya! Best of luck <3

the element of group 1 are reactive but those of group 18 are inert, why​

Answers

Answer:

Because elements of group  1 does not have stable electronic configuration and elements of group 18 have stable electronic configuration.

Explanation:

Because elements of group 1 do not contain stable electronic configuration and elements of group 18 include stable electronic configuration.

What are the element of group 1?

Group 1 elements contain the alkali metals, Li, Na, K, Rb, Cs, and Fr. The alkali metals exist all soft, shiny, and metallic when cut. They react efficiently with water, have low melting points and densities, and are good conductors of electricity. They all include one valence electron that they lose easily to form ions. Noble gas exists as any of the seven chemical elements that create up Group 18 (VIIIa) of the periodic table. The elements exist as helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).

The element of group 1 exist as reactive but those of group 18 exist as inert Because elements of group 1 do not contain stable electronic configuration and elements of group 18 include stable electronic configuration.

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Calculate the amount of mole(s) of CoF2 required to react with 12.8 moles of HCI.
CoCl2 + 2HF --> CoF2 + 2HCI

Answers

Explanation:

here's the answer to your question

4.1 shows a plant cell. g For Examiner's Use n. C D Fig. 4.1 (i) Name the type of plant cell shown in Fig. 4.1. [1]​

Answers

Answer:

palisade cell due to presence of chloroplasts

Answer: Freezing point depression

Answers

Explanation:

freezing point depression is a phenomenon that describes why adding a solute or solvent results in the lowering of the freezing point of the solvent

The velocity of an electron that is emitted from a metallic surface by a photon is 3.6E3 km*s^-1. (a) What is the wavelength of the ejected electron? (b) No electrons are emitted from the surface of the metal until the frequency of the radiation reaches 2.50E16 Hz. How much energy is required to remove the electron from the metal surface? (c) What is the wavelength of the radiation that caused photoejection of the electron? (d) What kind of electromagnetic radiation was used?

Answers

(a) The wavelength of the electron is 202.25885 nm

(b) The minimum energy required to remove the electron is 1.6565 × 10⁻¹⁷ J

(c) The wavelength of the causing radiation is approximately 8.84 nm

(d) X-ray

The question parameters are;

The given parameters of the electron are;

The velocity of the electron, v = 3.6 × 10³ km/s

(a) de Broglie wavelength is given as follows;

λ = h/(m·v)

Where;

λ = The wavelength of the wave

h = Planck's constant = 6.626 × 10⁻³⁴ J·s

m = The mass of the electron = 9.1 × 10⁻³¹ kg

Therefore, we get;

λ = 6.626 × 10⁻³⁴/(9.1 × 10⁻³¹ × 3.6 × 10⁶) = 202.25885 × 10⁻⁶

The wavelength, λ, of the electron is 202.25885 × 10⁻⁶ m = 202.25885 nm

(b) The energy required to remove the electron from the metal surface is known as the work function, W₀, which is given by the following formula

W₀ = h·f₀

Where;

f₀ = The threshold frequency

Given that the threshold frequency, f₀ = 2.50 × 10¹⁶ Hz, we have;

W₀ = 6.626 × 10⁻³⁴ J·s × 2.50 × 10¹⁶ Hz = 1.6565 × 10⁻¹⁷ J

The energy required to remove the electron from the metal surface, W₀ = 1.6565 × 10⁻¹⁷ J

(c) The wavelength of the radiation that caused the photoejection of the electron is given as follows;

The energy of the incoming photon, E = W₀ + (1/2)·m·v²

Where;

v = The velocity of the electron, and m = The mass of the electron

Therefore;

E = 1.6565 × 10⁻¹⁷ + (1/2) × 9.1 × 10⁻³¹ kg × (3.6 × 10⁶ m/s)² = 2.24618 × 10⁻¹⁷ J

We have;

E = h·f

∴ f = (2.24618 × 10⁻¹⁷ J)/(6.626 × 10⁻³⁴ J·s) = 3.38994869 × 10¹⁶ Hz

The speed of light, c = 299,792,458 m/s

From the equation for the speed of light, we have;

λ = c/f

∴ λ = (299,792,458 m/s)/(3.38994869 × 10¹⁶ Hz) = 8.84356919 nm ≈ 8.84 nm

The wavelength of the radiation that caused photoejection of the electron, λ[tex]_{causing \ radiation}[/tex] ≈ 8.84 nm

(d) The kind of electromagnetic radiation used which has a wavelength of 8.84 nm is the X-Ray which are electromagnetic radiation having wavelengths that extend from 10 picometers to 10 nanometers.

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The electron configuration for Helium (He) is shown below.

1s2

Which diagram shows the correct distribution of electrons in the electron shells of a helium atom?

Answers

DOESNT show the pics sorry

1 atm is equal to
O 1 mmHg
• 14.7 mmHg
• 76 mmHg
© 760 mmHg

Answers

Answer:

C 760 mm of hg

because this is the atmospheric pressure at sea level

Plzzz help do your best to answer these questions

Answers

The empirical formula is the simplest formula of a chemical compound.

To find the empirical formula, we take the following steps;

Divide the percentage by mass of each element by its relative atomic mass.Divide the quotient of each by the lowest value obtained instep 1 aboveWrite the result of step 2 above as the subscript following each atom.

1) O - 88.10/16,      H - 11.190/1

  O - 5.5,               H - 11.19

  O - 5.5/5.5,        H - 11.19/5.5

  O -  1,                 H - 2

Empirical formula = OH2

2) C - 41.368/12  H - 8.101/1,   N - 32.162/14,   O - 18.369/16

   C - 3,               H - 8,           N - 2,                  O - 1

   C - 3/1,            H - 8/1          N - 2/1                 O - 1/1

    C - 3,             H - 8,           N - 2,                   O - 1

Empirical formula = C3H8N2O

To obtain the molecular formula where n = number of atoms of each element;

Molecular weight = 174.204 g/mol

[ 3(12) + 8(1) + 2(14) + 16]n = 174

n= 174/88

n = 2 (to the nearest whole number)

Hence, we have;

[C3H8N2O]2

The molecular formula is C6H16N4O2

3)  C - 19.999/12,  H - 6.713/1,   N - 46.646/14,   O - 26.641/16

    C - 2,                H - 7,            N -  3,                 O - 2

    C - 2/2,            H - 7/2,         N -   3/2,             O - 2/2

    C - 1,                H - 4,            N -  2,                  O - 1

Empirical formula - CH4N2O

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please help me it's urgent​

Answers

C3H8 + 5 O2 = 3CO2 + 4H20

Answer:

a) NaSO4+Bacl2 -> Baso4+2Nacl

b) 4C3H3+15O2 -> 12CO2+6H2O

Explanation:

The atoms at the reactants is equal with the product.

If 16.4 grams of calcium nitrate is heated as shown in the reaction:

2Ca(NO3)2 -> 2CaO + 4NO2 + O2.

Calculate the volume of nitrogen dioxide produced at STP.​

Answers

Answer:

7.2

Explanation:

you first have to find the number of moles of nitrogen dioxide by using the number of moles for calcium nitrate and the mole to mole ratios

number of moles of calcium nitrate=mass/mm

=16.4/102

=0.16g/mol

then you use the mole to mole ratios

2 : 4

0.16: x

2x/2=0.64/2

x=0.32g/moles of nitrogen dioxide

then you use the formula for the volume

v=22.4n

=22.4×0.32

=7.2

I hope this helps

what’s the name of the organic molecule

Answers

Answer:

hexane

Explanation:

This is a 6- carbon hydrocarbon with no multiple bonds or any functional groups (such as -OH). Thus, the prefix 'hex' refers to the 6 carbons and 'ane' refers to the molecule being an alkane.

Naming molecules:

Number of carbons

• pentane: 5 carbons

• hexane: 6 carbons

• heptane: 7 carbons

• octane: 8 carbons

• nonane: 9 carbons

Functional groups (for 6- carbons molecules)

• Alkene (C=C): hexene

• Alcohol (-OH): hexanol

• Alkyne (C≡C): hexyne

Complete combustion of a 0.350 g sample of a compound in a bomb calorimeter releases 14.0 kJ of heat. The bomb
calorimeter has a mass of 1.20 kg and a specific heat of 3.55 J/(g;°C).
If the initial temperature of the calorimeter is 22.5°C, what is its final temperature?
Use 0= mCOAT

Answers

Answer:

i cant understand what you wrote

Explanation:

it's a blank screen

HELP . Read the following graduated cylinder.


Use this media to help you complete the question.


22.0 mL

22 mL

23.0 mL

22.5 mL

Answers

The volume of the liquid from the graduated cylinder is 22.5 mL

The last option (22.5 mL) is the correct option

The question seems to be incomplete

The image that completes the question is shown in the attachment below.

From the image, we observe that the liquid meniscus is between the 20 mL and 25 mL marks. That means the volume will lie in this range.

NOTE: The meniscus of a liquid is the upward or downward curve seen at the top of a liquid in a container.

The type of curve shown in the image is a concave meniscus and the volume of the liquid is read from the bottom of the curve.

To read the value from the graduated cylinder, we will first determine the difference between two consecutive lines. Between the 20 mL and 25 mL mark (two thick lines), we have 5 spaces separated by thin lines.

The measure between two consecutive lines is the difference between two thick lines divided by number of spaces between them

∴ The measure between two consecutive lines = (25mL - 20mL) ÷ 5

The measure between two consecutive lines = 5mL ÷ 5 = 1 mL

Now, to read the position of the liquid,

Starting from the 20 mL mark, the liquid exceeds two more lines + half way to the next line ( that is 2mL + 0.5 mL)

∴ The position of the liquid is 20 mL + 2mL + 0.5 mL = 22.5 mL

Hence, the volume of the liquid from the graduated cylinder is 22.5 mL

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Answer:

The answer is  22.5 mL

Explanation:

I hope this helps you :)

Water glass is found in

A. Liquid form at room temperature

B. solid state at room temperature

c. semi liquid form at room temperature

D. None of above​

Answers

Answer:

liquid form

Explanation:

am i right? if right like

Answer:

semi-liquid at room temperature

All three states of matter can be ____________ or a solvent in a solution.

Answers

The answer is: solute.

All three states of matter can be “solute” or a solvent in a solution.

what is meant by reaction element​

Answers

Answer: A reaction element are those elements that can take part in a chemical reaction.

Explanation:

An element is made up of atoms that has the same atomic number. It is the basic material of which all matter is composed of. These elements cannot be broken down further into smaller substances by any chemical reaction. Each element has a unique number of protons in its atom. For example,

--> a hydrogen atom has 1 proton,

--> a Helium atom has 2 protons,

--> a Lithium atom has 3 protons, and

--> a carbon atom has 6 protons.

A chemical reaction on the other hand involves rearrangement of the constituent atoms of reactants to create different substances as products. The bonds between atoms are either broken or created to form new molecules. There are different types of chemical reaction which includes:

--> Decomposition reaction

--> Neutralization reaction

--> single displacement reaction and

--> combustion reaction.

Which statement is true about percent yield

Answers

The options ? We can’t answer your questions without any options or choices
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