Investigate the effect of the concentration of the disodium thiosulfate solution on the rate of the process
Na2S2O3 + H2SO4 = Na2SO4 + SO2 + H2O + S.
Prepare a control sample by adding 1 cm^3 of sulfuric acid solution to 3 cm^3 of Na2S2O3 solution. Pay attention to the upcoming changes.
Pour 1 cm^3, 2 cm^3 and 3 cm^3 of Na2S2O3 solution into three test tubes respectively. Using a pipette (or syringe), add 2 cm^3 of water to the first tube, and 1 cm^3 of water to the second. Thus you get three solutions of equal volume and different concentration.
To each of the tubes successively add 1 cm^3 of sulfuric acid solution and note the time for the solution to darken from the sulfur released during the reaction. Record the results of each experiment in the table.
Graphically represent the relationship between the reaction time and the concentration of Na2S2O3 (∆t = f1(c)).
Represent the graphical dependence 1/∆t = f2(c).
Based on the graphs, draw a conclusion about the effect of concentration on the rate of the reaction.​

The silica content of magma derived from partial melting of an igneous rock is higher than the rock itself.

The composition of magma is depends upon the two factor : rock , that is melted to form the magma and the conditions in which magma is melted. In partial melting , some of the minerals are melted in the rock. The different minerals have the different melting points. The mineral which is higher in silica have lower melting point. so, Partial melting produce more silica as compared to the original one.

Thus, The silica content of magma derived from partial melting of an igneous rock is higher than the rock itself.

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Answer:

Explanation:

500 = 60 * ?  

500/60 = ?

8.33333333333 = ?

so it's 8 and one third  :)

Answer:

A

Explanation:

2 mol HgO : 1 mol O2

1 mol HgO is 216.589 grams

2 mol HgO is 433.178 grams

433.178 grams HgO : 1 mol O2

(0.726) 433.178 grams HgO : (0.726) 1 mol O2

314.4 grams HgO : 0.726 mol O2

or just 314 grams

the answer is cold front

Answer:

Mixtures are formed by mixing two or more substances physically such that no chemical reaction takes place between the components.

Answer:

Explanation:

A solid dissolves in a liquid when it mixes completely with the liquid. The solid has broken down into pieces so small that its particles spread all throughout the new mixture. The solid and liquid will stay mixed without shaking. Everything dissolves in water.

hope it helps!

Flecainide, propafenone, and moricizine are unique in that they have no effect on the repolarization phase but all the above three do decrease conduction in the ventricles.

A class 1c anti-arrhythmic drug known as propafenone, which is also marketed under the name Rythmol, is used to treat conditions like atrial and ventricular arrhythmias that are linked to rapid heartbeat.

Moracizine, sometimes known as moricizine, is a class IC antiarrhythmic that is marketed under the trade name Ethmozine. It was discontinued in 2007 for commercial reasons after being used for the prevention and treatment of significant and life-threatening ventricular arrhythmias.

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A velocity/time graph would look like with no acceleration is the straight line with zero slope

Here the given data is related with the concept and fundamental of velocity/time graph and the graphical representation where the velocity of an object is concluded with respect to the time is known as velocity-time graph

Therefore the given case in the graph is straight line with zero slope means no acceleration

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Answer:

C

Explanation:

got it right

A process that could be represented by the letter A in the given diagram is fertilization. The correct option is D.

It goes through four stages: menstrual, regenerative, proliferative, and secretory. The cycle duration is the time it takes from the first day of one menstruation to the first day of the following menstruation; most usual cycles last 28 days, but it can range from 21 to 40 days.

The average cycle lasts 28 days; however, cycles can last anywhere from 21 to 35 days. The menstrual cycle is triggered by the rise and fall of chemicals in your body known as hormones.

Therefore, the correct option is D, fertilization.

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In the reaction H₂ + I₂ --> 2HI, the hydrogen undergoes oxidation.

The balanced given chemical reaction is :

H₂ + I₂ --> 2HI

The oxidation state of Hydrogen is increased from 0 to +1 and the increase in oxidation number is called as oxidation. The loss of electrons is called as oxidation.

The oxidation state of iodine is decreased from 0 to -1 and the decrease in the oxidation state is called as the reduction. The gain of electrons is called as the reduction.

oxidation = Hydrogen , Reducing agent = hydrogen

reduction = Iodine , oxidizing agent = Iodine

Thus, In the reaction H₂ + I₂ --> 2HI, the Hydrogen undergoes oxidation.

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0.25g/L is the concentration of Ca(OH)2 in the bottle when 20 ml of water and 20 ml of 0.50 g/l Ca(OH)2 is added into a bottle.

Concentration in chemistry is the measure of the constituent divided by the volume of the mixture.

Ca(OH)2 stands for Calcium hydroxide formed by the action of water on the calcium.it is used in forming a solution ,named limewater. it is also called as Slaked lime

Acc. to the given data:

c1=0.50g/l

v1=20ml=0.020L

c2=?

v2=20ml+20ml=40ml=0.040L

now we use the equation

c1v1=c2v2

rearranging the above equation

c2=c1*v1/v2

putting values

c2=0.50*0.020/0.040

c2=0.25g/l

Hence, 0.25g/L is the concentration of Ca(OH)2 in the bottle when 20 ml of water and 20 ml of 0.50 g/l Ca(OH)2 is added into a bottle.

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Answer:yes but yes

Explanation:yes

Answer:

exaggerate

Explanation:

There are many possible verbs for this.  I suggest exaggerate, but one many also consider:

"make a false claim"

"misrepresent"

In order to properly balance an equation, we need to make sure that the same amount of elements on the reactants side matches the number of elements on the products side, we can do that by increasing the number in front of each molecule, the so called stoichiometric coefficient. In the reaction from the question we can properly balance by adding the following stoichiometric coefficients

1. 2 H2 + O2 -> 2 HO2

2. FeCl2 + H2O -> FeO + 2 HCl

3. C4H8 + 6 O2 -> 4 CO2 + 4 H2O

4. ?

5. 2 NaOH + MgCl2 -> 2 NaCl + Mg(OH)2

49 becase you multilpy it

Explanation:

Enzymes known as transfer RNA (tRNA) synthetases are responsible for joining a particular amino acid to its associated tRNA in order to produce proteins at the ribosome.

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Answer:

A b/c aluminum

Explanation:

don't forget to follow rate like

Answer:

15 electrons

Explanation:

The volume of carbon dioxide gas produced will be 23.3mL

SrCO (s) + 2HCl(aq) → SrCl₂(aq) + CO₂(g) + H₂O(l)

Here concentration of the strontium carbonate is in excess and the concentration of HCl is 25mL having molarity 0.1072 M

Number of moles of HCl= mass/ molar mass,

Molar mass of HCl= mass/ Number of moles

Molar mass of HCl= 36.5

Mass of HCl from balanced equation= 2×36.5=73

Molarity= Number of moles/ volume

According to stoichiometry the moles of HCl is 2 and that of  CO₂ is 1.

We know that,

PV =nRT

1.05× V= 1 ×0.0821× 298

V= 0.0821×298/ 1.05

= 23.3 mL

By ideal gas equation, volume of carbon dioxide is calculated as 23.3 mL.

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Answer: yes

Explanation: no

The temperature in the final pressure formation is 2201.13K and the change in the pressure is 8.2atm

It is given that the initial pressure of the gas P₁ is 3.4atm and the initial temperature is T₁ 644.4K the final pressure of the gas is 11.6 atm. To find the final temperature, According to Gay Lussac's Law,

P₁/T₁ = P₂/T₂

On substituting the values of P₁,T₁ and T₂ we get,

3.4/644.4 = 11.6/T₂

0.005276 = 11.6/T₂

T₂ = 11.6/0.005276

T₂ = 2201.13K

Therefore the final temperature T₂ is 2201.13K when the pressure is changed from 3.4 atm to 11.6 atm

Thus the pressure change is calculated by,

ΔP = P₂ - P₁

ΔP = 11.6 - 3.4

ΔP = 8.2 atm

The change in pressure is 8.2atm

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Answer:

I think C

Explanation:

don't forget to follow rate like

In the reaction Ba(ClO₃)₂ → BaCl₂ + 3O₂, the valance electrons of Ba will be 2.

The given reaction is Ba(ClO₃)₂ → BaCl₂ + 3O₂

This reaction is a kind of decomposition reaction, barium chlorate breaks down into barium chloride and three moles of oxygen.

Barium possesses two outer shell/valency electrons, as seen by the subscripts of the components in the compound [tex]BaCl_{2}[/tex]. The two chlorine atoms receive two of these outside electrons from it. To comply with the octet rule, any chlorine gets one electron from barium.

Therefore, the valance electrons of Ba will be 2.

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Answer:

Divide the distance the object traveled by the time it took to get there.

Explanation:

To calculate the speed on an object, start by determining how far the object has traveled. Next, figure out the amount of time that the object took to cover that distance. Finally, divide the distance the object traveled by the time it took to get there. Don't forget to label the speed with the correct units of measurement.

Answer:

Explanation:

Here, we want to write the equilibrium constant expression

Generally, to write this, we exclude non-gaseous molecules

We simply put divide the concentration of the products (in square brackets) raised to the number of moles divided by that of the reactants raised to the number of moles too

For the given equation, we have the expression as:

Yes, the eqⁿ is balanced.

Explanation:

The reaction between hydrogen and oxygen results to the formation of water.

[tex]{ \purple{ \sf{2 H₂ + 1 \: O ₂ \: ➪ \: 2 H₂O}}}[/tex]

To check whether the eqⁿ is balanced, let us count the numbers in the reactant and product sides

L.H.S.

H = 2×2 = 4.

O = 2×1 = 2.

R.H.S.

H = 2×2 = 4

O = 2×1 = 2.

Hence it is a balanced chemical equation.

Answer : yes ,it is balanced so your answer should look like this with the state symbols

2H2(g)+O2(g)→2H2O(l)

A drop of ink will spread faster as higher the temperature is. The higher the temperature, the more agitated the molecules will be, so they will move faster. So the mobility of the particles is related to their temperature.

So:

Particles in Flask C show the greatest mobility of the particles, this flask will have the highest temperature.

Particles in Flask A show the least mobility, this flask will have the lowest temperature.

Answer:

Flask A 10°C

Flask B 25 °C

Flask C 50 °C

The mobility of the particles is related to their temperature. The particles in Flask A show the least mobility, and the particles in Flask C show the greatest mobility.

An ionic bond forms when any element transfers its valence electron permanently to the reactant one to form a mutual bond. the atom which transfer the electron becomes positively charged atom and the one which takes the electron becomes negatively charged.

A negatively charged electron located in the outermost shell of the atom is termed as valence electron.

Positively charged atom means the atom having more no of protons then electron in  its nucleus and have symbol such as [tex]X^{+}[/tex].

An ionic bond forms when any element transfers its valence electron permanently to the reactant one to form a mutual bond. the atom which transfer the electron becomes positively charged atom and the one which takes the electron becomes negatively charged.

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Option c . The composition of matter and how it changes.

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Diamond's standard enthalpy is zero at 298 K and 1 atm of pressure.

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