When the atoms that are transition elements form ions, the __ electrons are lost before the _electrons are lost.

Explanation:

MgCl2(aq) + NaOH(aq) = Mg(OH)2(s) + NaCl. Both magnesium nitrate and sodium hydroxide solutions are colourless solutions. When they react with each other, a white precipitate (Mg(OH)2) and a colourless solution is given. Sodium chloride exists in the colourless aqueous solution.

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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For first order plot of ln( [tex]P_{SO_{2}Cl_{2}}[/tex]) vs time will be a straight line, which shows first order reaction

A first-order reaction can be defined as a chemical reaction in which the reaction rate is linearly dependent on the concentration of only one reactant. In other words, a first-order reaction is a chemical reaction in which the rate varies based on the changes in the concentration of only one of the reactants

Every mole of SO₂Cl₂ that dissociates results in a mole of SO₂ &Cl₂

[tex]\rm P_{total}= P_{Cl_{2}\\}+ P_{SO_{2}Cl_{2}}+ P_{SO_{2}}\\\\ P_{total} = P_{o}- \beta +\beta + \beta\\\\ P_{total} = P_{o}+\beta[/tex]

For first order plot of ln( [tex]P_{SO_{2}Cl_{2}}[/tex]) vs time will be a straight line.

t(hr)           [tex]P_{SO_{2}Cl_{2}}[/tex]                            ln([tex]P_{SO_{2}Cl_{2}}[/tex] )

0                11.07                                  2.404

3                 7.35                                 1.995

6                4.88                                 1.585

9                3.24                                 1.176

12                2.15                                 0.765

15                1.43                                 0.358

β = P(total) - P(initial)

[tex]\rm P_{SO_{2}Cl_{2}}[/tex] = P₀ - β

for t= 3

β =3.72

and

[tex]\rm P_{SO_{2}Cl_{2}}[/tex] = 7.35

For first order plot of ln( [tex]P_{SO_{2}Cl_{2}}[/tex]) vs time will be a straight line, which shows first order reaction.

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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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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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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:

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=)

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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Answer:

it is a weak acid

acid

Explanation:

formaldehyde is a weak acid (pK greater than 13),

Answer:

it’s 10ml

Explanation:

200/2 = 10

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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The required formula of hydrate is MgSO₃.6H₂O.

The number of moles of water per mole of anhydrous solid (x) will be computed by dividing the number of moles of water by the number of moles of anhydrous solid (x) to find the hydrate's formula.

Moles will be calculated as:
n = W/M, where

Moles of MgSO₃ = 0.737g / 104.3g/mol = 0.007mol

Moles of H₂O = 0.763g / 18g/mol = 0.04 mol

Number of H₂O molecule = 0.04/0.007 = 5.7 = 6

So formula of hydrate is MgSO₃.6H₂O.

Hence required formula of hydrate compound is MgSO₃.6H₂O.

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Answer:

rsghkm vumm

Explanation:

el correo de confirmación con la que se ha enviado desde correo ok recibido gracias saludos María del Ca

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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Answer:

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

Answer: See attached image

Explanation:

Grams are the unit of measurement of the mass or the weight of the substance. There are 1.17 gms of chlorine atoms in the sample.

The mass of the substance is the multiplication of the moles and the molar mass.

Barium chloride dissociates as:

BaCl₂ ⇄  Ba²⁺ + 2 Cl⁻

From the reaction, it can be said that 1 mole of barium chloride dissociates into 1-mole barium ion and 2 moles of chloride ions.

Moles of barium chloride are calculated as:

Moles = mass ÷ molar mass

= 3.45 gm ÷ 208.23 g/mol

= 0.016 moles

If 1 mole of Barium chloride has 2 moles then 0.016 moles of the sample will have, 0.0331 moles of chloride ions.

The mass of chlorine atoms is calculated as:

Mass = moles × molar mass

= 0.0331 × 35.45

= 1.17 gms

Therefore, 1.17 gms of chlorine atoms are present in barium chloride.

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Because:

Their roots are no longer in the soil. Thus, can't absorb water and mineral ions needed for plant growth via photosynthesis.

Hope this helps!

Answer:

Yes

Explanation:

Well this is because when a plant is planted water goes from the soil, into the roots then finally distributed to other parts of the plant.

So when plants have been plucked or uprooted water no longer has access to the plant which may result to the plant being dried up and will possibly die

Answer:

b) heating, cooling

Explanation:

Heating will favour dissolution (it helps dissolving faster).

Cooling helps in crystallization.

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:

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

According to the experim

Answer:

law of multiple proportion

Explanation:

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:

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

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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Answer:

280gr of salt

Explanation:

4.80 x ( 22.99 + 35.45) = 280gr

Simple as that

           

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:  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: