Name the substances
50 pointssss! Please help me

The mass of silicon, Si produced from the reaction is 329.41 g

SiCl₄ + 2Mg —> 2MgCl₂ + Si

Molar mass of SiCl₄ = 28 + (35.5×4) = 170 g/mol

Mass of SiCl₄ from the balanced equation = 1 × 170 = 170 g

Molar mass of Si = 28 g/mol

Mass of Si from the balanced equation = 1 × 28 = 28 g

From the balanced equation above,

170 g of SiCl₄ reacted to produce 28 g of Si.

From the balanced equation above,

170 g of SiCl₄ reacted to produce 28 g of Si.

Therefore,

2 Kg (i.e 2000 g) of SiCl₄ will react to produce = (2000 × 28) / 170 = 329.41 g of Si

Thus, 329.41 g of Si were obtained from the reaction

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Answer:

4

Explanation:

Significant figures (also known as the significant digits, precision or resolution) of a number in positional notation are digits in the number that are reliable and absolutely necessary to indicate the quantity of something.

Significant numebrs: 69.38

We don't need the extra zero!

Answer:

There are 5 significant figures in 69.380.

Explanation:

The "0" in the thousandths, which is a trailing zero, is significant because it is part of the measurement value.

Answer:

did you mean catenation? catenation is the process of bonding of the atoms of same element into a ring of series called a chain.

In the serial dilution for the preparation of the dye, the total dilution factor is 1/20

Dilution is the process of preparing solutions of lesser concentration from a more concentrated solution.

In test tube 1:

Total volume = 60 mL

Dilution factor = 1:4

1 parts stock solution is required for every four parts diluent

Total parts = 5

volume of diluent = 4/5 × 60 mL = 48 mL

48 mL of diluent is added to 12 mL of stock solution to prepare the solution in test tube 1.

In test tube 2:

Total volume = 15 mL

Dilution factor = 1:5

1 parts stock solution is required for every five parts diluent

Total parts = 6

volume of diluent = 5/6 × 15 mL = 12.5 mL

12.5 mL of diluent is added to 2.5 mL of stock solution from tube 1 to prepare the solution in test tube 2.

Total dilution factor = 1/4 × 1/5 = 1/20

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Answer:

3.46 x 10^-9 m; 6.0 x 10^-7 m; 3.00 x 10^20 Hz

Explanation:

I'm not 100% sure abt the last one

The wavelength of the electromagnetic wave with frequencies of  8.68×10¹⁶ H z, 5.0 ×10¹⁴ Hz, and 1.00× 10⁶ Hz is equal to 3.45nm, 6.00 nm, and 30 nm respectively.

The frequency of the electromagnetic wave can be described as the number of oscillations of an electromagnetic wave in one second. The frequency of a wave has S.I. units which are represented as per second or hertz.

The wavelength of the electromagnetic wave is the distance between the two adjacent points in phase w.r.t. each other.

The relationship between wavelength (λ), frequency, and speed of light (c) of electromagnetic waves are:

c = νλ

Given, the frequency of the wave, ν = 8.68×10¹⁶ Hz

The speed of light, [tex]c = 3\times10^8 m/s[/tex]

The wavelength of the electromagnetic waves can determine from the above-mentioned relationship:

λ = c/ν = 3×10⁸/8.68×10¹⁶ = 3.45 × 10⁻⁹ m. = 3.45 nm

Given, the frequency of the wave, ν = 5.0 ×10¹⁴ Hz

λ = c/ν = 3×10⁸/5.0 ×10¹⁴ Hz = 6 × 10⁻⁹ m. = 6.00 nm

Given, the frequency of the wave, ν = 1.00× 10⁶ Hz

λ = c/ν = 3×10⁸/1.00× 10⁶ Hz  = 3.00 × 10⁻⁸ m. = 30 nm

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Answer:

The answer is 1.4 km

Explanation:

Answer:

The equation is balanced

Explanation:

NaCl (aq) + AgNO3(aq) ––> AgCl (s) + NaNO3 (aq)

NaCl (aq) + AgNO3 (aq)

Na = 1 , Cl=1 , Ag = 1 , No3= 1

AgCl (s) + NaNO3 (aq)

Ag = 1 , Cl=1 , Na = 1 , No3= 1

Answer:

F- and O2-

Mg2+ and S2

Explanation:

Ionic compounds compose of a metal and a nonmetal. They also compose of a cation(positively charged) and anion(negatively charged). Fluorine and Oxygen are both nonmetals and negatively charged. Barium and silver are both positively charged metals.

Answer:

Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances.

Explanation:

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Answer:

the things they are made out of

Answer:

B.

Explanation:

B. Carbon dioxide(CO2)and water(H2O)

they represent the raw material of photosynthesis.

hope this helps you

C6H12O6 + 6O2 ==> 6CO2 + 6H2O

kind of out of topic:

oxygen is usually represented as O2 since its diatomic

Ideal gas law is valid only for ideal gas not for vanderwaal gas. There are so many laws that are deduced from ideal gas equation. There are 0.05mole in the sample occupies 1.50 L at 25.0 o C and 741 mm Hg.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

P×V=n×R×T

where,

P = pressure of ideal gas= 741 mm Hg= 0.97 atm

V= volume of ideal gas =1.50 L

n =number of moles of ideal gas

T =temperature of ideal gas =25°C =298K

R = Gas constant = 0.0821 L.atm/K.mol

substituting the values

P×V=n×R×T

0.97 atm ×1.50 L=n×0.0821 ×298

number of moles of ideal gas =0.05mole

Therefore, there are 0.05mole in the sample  occupies 1.50 L at 25.0 o C and 741 mm Hg.

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Yes, Fe(s)+CuSO4→FeSO4(aq)+Cu(s) is a redox reaction. The reducing agent is Fe(s), while the oxidizing agent is CuSO4.

Oxidation-reduction reaction is the type of reaction in which electrons are transferred from one element to another. A compound or an element either gains are looses an electron in redox reactions.

Fe(s)+CuSO4→FeSO4(aq)+Cu(s)

From the equation above, Fe(s) is the reducing agent because it gives away 2 electrons and undergoes oxidation reaction.

From the equation above, CuSO4 is an oxidizing agent because it gives oxygen to Fe(s) and undergoes a reduction reaction.

Therefore, the reducing agent is Fe(s), while the oxidizing agent is CuSO4.

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Answer:

when light bounched we call it, reflection

The potential of the electrochemical cell is 0.03 V.

An electrochemical cell is a cell that produces chemical energy from a spontaneous chemical process. Let us recall that cell potential can be obtained from; Ecell = 0.0592/n log K

The cell equation is;

Sn(s) + ClO2(g) ----> Sn^2+(aq) + ClO^2-(aq)

Hence;

K = (1.60) (1.60)/(0.220)

K = 11.6

Therefore;

Ecell = 0.0592/2 log (11.6)

= 0.03 V

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The phenomenon that best explains the miscibility of heptane in pentane is that both are non-polar compounds.

Solubility is defined as the ability of a solute or substance to dissolve in a given solvent and at a particular temperature.

Heptane is a straight-chain alkane hydrocarbon that contains 7 carbon atoms. It is a non polar solvent.

Pentane is also a straight-chain alkane hydrocarbon that contains 5 carbon atoms. It is also a non- polar solvent.

Both pentane and heptane are non-polar because the atoms in their molecules share electrons equally. They are able to dissolve each other because they are alike.

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V1M1c1 = V2M2c2

29 x 0.26 x 1 = V2 x 0.4 x 2

V2 = 9.425

Answer:

Driving cars

Explanation:

Because driving cars won't effect climate change

Answer:

i am not sure but is it hydrogen oxide

Explanation:

Answer:

Thermostatic valve

Explanation:

"Is located in the drain line; the drain and the area surrounding it are the coolest areas in the sterilizer. A sensor in the chamber drain measures steam temperature and automatically controls the flow of air and condensate from the sterilizing chamber."

Hope this helps

The molarity of the solution decreases on dilution by adding distilled water. The molarity of the solution of 17.51 ml ,  6 M HCl when added to 6.36 ml is 4.4 M.

Molarity is a common term used to express the concentration of a solution. The molarity of a solution is the ratio of the number of moles of solute to the volume solution in liter.

If a solution of volume V1 ml with M1 molarity is diluted to V2 ml of M2 molarity, then, the relation between the two concentrations is written as:

M1 V1 = M2 V2.

given, M1 = 6 M

V1 = 17.51

the volume after the addition of 6.36 ml water, v2 = 17.51 + 6.36 =  23.78 ml

then M2 = M1 V1/V2

M2 = 6 M × 17.51 ml/ 23.78 ml

      = 4.4 M.

Therefore, the molarity of the solution after dilution is 4.4 M.

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Answer:

...

Explanation:

i lowkey dont know what to put, i just need my points srry;(

Answer:

The action is acceleration and the reaction is friction

Answer:

Gold is present in electronic wastes like smart phones,TV sets and computers etc.It is necessary to recover gold effectively.Recovering precious metal from electronic waste could help to reduce the environmental impact and cut carbon dioxide emissions

Simply one who think about the target metal without disturbing the other major impurities will be the idea solution for the industrial scale gold recovery from E-waste... In our lab we have developed the process which was patented in India... hope soon it will publish into the public domain.... PROCESS FOR THE RECOVERY OF GOLD FROM MANUALLY DISMANTLED GOLD COATED E-WASTE

Use of both physical and biological processes may help in a better recovery of Gold. Several microorganisms have been discovered which are efficient in solubilising gold from the e-wastes.

Explanation:

hope it helps

Explanation

Step 1: balance the equation

Step 2: Place the given mass (mole) above the correspond formula and X above the formula sub whose m B to be determined

Step3: Write the total molar mass of the the substance beliw the formula of each substance.

3.40 X

2NH3 + 3CuO -> 3CuO +N2 +3H2O

3 mol 1 mol

3.40 = X

3mol 1mol

X(3)=3.40 *1mol

3 mol

X= 3.40 *1 mol

3 mol

X=1.3333

This is because i am asked only the mole but if it asks what mass(what gram) we will find the mass

Answer:

here's your answer..

Explanation:

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