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The volume of water needed to prepare the solution given the data is 2.16 L

This is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Mole = mass / molar mass

Mole of CaCO₃ = 756 / 100.1

Mole of CaCO₃ = 7.55 moles

Volume = mole / molarity

Volume = 7.55 / 3.5

Volume = 2.16 L

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Answer:

base

Explanation:

bases have a phone scale more than 7

Answer

Explanation:

P1=93.5 kPa  V1=480 mL  P2=?  V2=375 mL  

Answer:

16 mol NaCl.

Explanation:

Do the train track method to cancel out all the units except moles of NaCl on top. Remember one mole of any gas occupies 22.4 L at STP.

179.2 L CO2  x 1 mol CO2/22.4 L CO2 x 2 mol NaCl/1 mol CO2

= 16 mol NaCl

Answer:

Laser light is made of one specific color

Explanation:

Regular light is a mixture of electromagnetic waves of different wavelengths

Laser light is monochrome (one colour).

common laser colors are

red , green and violet

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Answer: C

Explanation: got it right on edge 2023

The mass of copper that will be produced from copper oxide is determined as 3.19 g.

The mass of copper that will be produced from copper oxide is calculated as follows;

2Cu + O₂  -----> 2CuO

2          1             2

2(63.5) ------------ 2(79.5)

x ---------------------- 4 g

x = (4 x 2 x 63.5)/(2 x 79.5)

x = 3.19 g

Thus, the mass of copper that will be produced from copper oxide is determined as 3.19 g.

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Answer:

280gr of salt

Explanation:

4.80 x ( 22.99 + 35.45) = 280gr

Simple as that

           

The amount, in grams, of HCl that are in 25.0 grams of concentrated hydrochloric acid will be 9.5 grams

Every concentrated HCl contains 38% HCl by mass. This means that 38 grams of HCl would be in every 100 grams of concentrated HCl.

There, for 25.0 grams concentrated HCl, the amount of HCl can be calculated as:

         38/100 x 25.0 = 9.5 grams

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The value of density in the required units is [tex]\rm \rho = 2.4\times 10^{-5} lb/in^{3}[/tex]

Density, mass of a unit volume of a material substance. The formula for density is

d = M/V

where d is density, M is mass, and V is volume.

Density is commonly expressed in units of grams per cubic centimetre.

In the given question

Density given is 0.668 g/L

1 lb = 454grams.

1L = 1000 cm³

1 inch = 2.54 cm

Density in pounds per cubic inch =

[tex]\rm \rho = 0.668 \times \dfrac{(1 \;lb)(1 grams)}{454\; grams}\times \dfrac{(1 L)(2.54)^{3}(1 cm^{3})}{1000cm^{3}(1\;L)(1 in^{3})}[/tex]

[tex]\rm \rho = 2.4\times 10^{-5} lb/in^{3}[/tex]

Therefore the value of density in the required units is [tex]\rm \rho = 2.4\times 10^{-5} lb/in^{3}[/tex].

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Answer:

Explanation:

It's simple train track method of cancelling out units.

If we read the balanced equation as this: 2 dm3 of octane reacts to form 16 dm3 of CO2 then how much CO2 is produced by 1 dm3?

Would you agree that it would be half of 16?

[tex]\frac{2dm3}{16 CO2} = \frac{1dm3}{?CO2}[/tex]

Cross multiply and solve for ?, you get 8.

Selenium chloride has a molar mass of 149.86 g/mol. The mass of selenium dichloride in grams is 29.22 grams.

Mass is the quantity of matter of a physical body.

The molar mass is given 149.86 g/mol

The number of moles is 0.195

By the formula of molar mass

[tex]\rm Molar\;mass = \dfrac{mass}{number\;of\;moles} \\\\\rm mass = molar mass \times number\;of\;moles\\\rm mass =149.86 \times 0.195 = 29.22 g[/tex]

Thus, the mass of selenium dichloride in grams is 29.22 grams.

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The percent composition of Cesium and Fluorine in CsF are 87.493 % and 12.507 % respectively.

Percent composition is very simple. Percent composition tells you by mass what percent of each element is present in a compound.

Molecular mass of Cs = 132.9054519

Molecular mass of F = 18.9984032

Molecular mass of CsF = 132.9054519 + 18.9984032 = 151.9038551

CsF: Percent composition by element:

Cesium (Cs) =  [tex]\frac{32.9054519 X 100}{151.9038551}[/tex] = 87.493 %

Fluorine (F) =  [tex]\frac{18.9984032 X 100 }{151.9038551}[/tex]= 12.507 %

Hence, the percent composition of Cesium and Fluorine in CsF are 87.493 % and 12.507 % respectively.

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The volume that sulfur dioxide will occupy with a volume of 652 mL at 40.0°C and 0.75 atm is 0.019moles. Details about volume can be found below.

The volume of a gas can be calculated using the following formula:

PV = nRT

0.75 × 0.652 = n × 0.0821 × 313

0.489 = 25.69n

n = 0.489/25.69

n = 0.019moles

Therefore, the volume that sulfur dioxide will occupy with a volume of 652 mL at 40.0°C and 0.75 atm is 0.019moles.

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An ecosystem is simply a collection of communities of plants, animals, and microbes interacting together and with their physical environments.

Energy enters the ecosystem through a group of living organisms known as the producers. the producers are mainly the green plants that are capable of photosynthesizing.

Photosynthesis converts solar radiation from the sun to chemical energy in green plants. Another group of organisms in the ecosystem, the primary consumers, feed directly on the producers and as such, are able to gain some energy from them.

The secondary consumers obtain their own energy by feeding on primary consumers. Tertiary consumers feed on the secondary consumers for their own energy and the food chain goes on and on.

Only about 10% of the available energy in one trophic level goes to the next trophic level. The rest of the energy is lost as heat to the surroundings. Thus, the producers have the highest energy in the ecosystem while organisms at the top of the food chain have the lowest energy.

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Answer:  100 milligrams per dose

10 mg per kg. The drug of ten kilos so you do

10 mg * 10 kg = 100 mg per dose

Explanation:

The effluent flow in concentration and particulate mass flow will be 0.198m³/sec.

It should be noted that the total inflow will be equal to the total outflow. Therefore,

0.2 + 0.048 = 0.05 + We

Collect like terms

Qe = 0.2 + 0.048 - 0.05

Qe = 0.198m³/sec

The concentration will be:

= (360 × 1000)/0.05

= 7200mg/L.

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Answer:

law of multiple proportion

Explanation:

Answer:

SEE BELOW

Explanation:

Given   500 cm^3 = V1    760 mm = P1     (760*2) = P2

Required   V2

P1V1 = P2V2

RE-ARRANGE  TO    P1V1/P2 = V2

(760)(500) /(760*2) = V2

V2 = 250 ML

According to Boyles law

[tex]\\ \rm\Rrightarrow P\propto \dfrac{1}{v}[/tex]

Now pressure is doubled means multiplied by 2

The volume will be divided by two of get halved .

New volume

Answer:

an organic compound made by replacing the hydrogen of an acid by an alkyl or other organic group. Many naturally occurring fats and essential oils are esters of fatty acids

Explanation:

ester, any of a class of organic compounds that react with water to produce alcohols and organic or inorganic acids. Esters derived from carboxylic acids are the most common. The term ester was introduced in the first half of the 19th century by German chemist Leopold Gmelin

Answer:

b) heating, cooling

Explanation:

Heating will favour dissolution (it helps dissolving faster).

Cooling helps in crystallization.

The students can determine which of the solutions contains salt through the conductive tester.

It is a solution containing ions are atoms that have gained or lost electrons to acquire a positive (lost electron) or negative (gained electron) charge.

An ionic solution would be able to conduct electricity whereas the covalent would not so if you have a conductivity tester which is available in most labs.

The students can distinguish between the 2 solutions through the conductive tester.

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Answer:

Increase of pressure increases the coordination number during crystallization e.g. by applying pressure the NaCl type crystal structure having 6:6 coordination number changes to CsCl type crystal having coordination number 8:8.

welc!! you Σ=)

Answer:

The nuclear composition of uranium-235 is 92 protons and 143 neutrons.

Answer: See attached image

Explanation:

Answer:

All carbonates contain one carbon atom bonded to three oxygen atoms. Carbonates may include other elements. A few are calcium, iron, and copper. Carbonate minerals are often found where seas once covered the land.

Answer:

Air resistance opposes the gravity in a falling object hence the object loses speed once it reaches terminal velocity.

According to the experim