briefly describe how the pH of a colourless solution could be measured using a universal indicator​

Answer:

he total mechanical energy E of a particle is defined as the sum of the kinetic and potential energies

Explanation:

Answer:

thermal energy

Explanation:

Answer:

1 - D) friction

2- B) rough

3- B) gravity

4- A)smooth

5- C)gravity pulls you down

Answer:

x = 3/6.02 = 0.50.

Explanation:

1 mole of CO2 has 6.02 x 10^23 molecules of CO2.

Say x moles of CO2 has 3.0x10^23 molecules of CO2.

Therefore x = 3/6.02 = 0.50.

I think the answer is C. (Increasing the number of variables in the experiment)

Answer:

ITS B

Explanation:

THE OTHER GUY WAS WRONG

The empirical formula for dioxin (C₁₂H₄Cl₄O₂) is (C₆H₂Cl₂O).

We can determine the components of a chemical compound by looking at its formula. We can determine the precise number of atoms in a compound's molecule using its molecular formula. The ratio of these components is provided by the empirical formula. It is the compound's molecular formula scaled down to its lowest integer ratio.

Empirical formula for dioxin (C₁₂H₄Cl₄O₂) is (C₆H₂Cl₂O).

To determine the emperical formula:

Step1: Determine the masses.

Step 2: Multiply the grams by the atomic mass to get the number of moles.

Step 3: Subtract the least number of moles from the total number of moles of each element.

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Answer:

Explanation:

The rock cycle basically tell you how the different types of rocks are related to each other and tells how they change over time.

Hope this helped!!!

Answer:

The rock cycle is the process by which rocks of one kind change into rocks of another kind. Metamorphic rock is igneous or sedimentary rock that has been heated and squeezed. It can erode into sediment or melt into a hot substance known as refordium. It is formed under extreme pressure and temperature deep inside mountain chains. For example, sedimentary rock shale becomes slate when heat and pressure are added, thus transforming it into another state of rudementury.

Answer:

See explanation

Explanation:

a) Every substance melts at a particular temperature known as the melting point of the substance. The melting point of ice is 0°C. Hence ice melts at  0°C.

b) There are three states of matter; solid liquid and gas. The particles of matter in each stage of matter possess varying degrees of freedom.

In the solid state, the intermolecular forces between the particles of water that compose ice are very strong. Hence the particles do not translate, they only vibrate or rotate about their mean positions.

In the liquid state, the magnitude of intermolecular interaction is less than that of the solids hence the molecules can translate but not with a high kinetic energy.

In the gaseous state, there is a minimum intermolecular interaction between particles theoretically hence the particles are really free to move about with a very high kinetic energy.

Answer:

[tex]0.01molO_2[/tex]

Explanation:

Hello there!

In this case, by considering the definition of molar solution as the moles of solute over volume in liters or cubic meters of solution, we can see that actually 10.0 L of the solution are equal to 10.0 dm³. In such a way, since the concentration is 0.001 mol / dm³, the moles of oxygen that are dissolved turn out to be:

[tex]0.001mol/dm^3 * 10.0dm^3\\\\0.01molO_2[/tex]

Best regards!

Answer:

breathed in air contains oxygen while breathed out air contains higher percentage of CO2

Answer:

1. The balanced chemical reaction is:

[tex]HNO_3(aq)+NaOH(aq)\rightarrow NaNO_3(aq)+H_2O(l)[/tex]

2. The balanced chemical reaction is:

[tex]2HI(aq)+Sr(OH)_2(aq)\rightarrow SrI_2(aq)+2H_2O(l)[/tex]

Explanation:

Hello there!

In this case, according to the given chemical reactions, it is necessary to keep in mind the cations and anions are switched around as a result of the bonds rearrangement in these neutralization reactions; therefore, we can proceed as follows:

1. The balanced chemical reaction is:

[tex]HNO_3(aq)+NaOH(aq)\rightarrow NaNO_3(aq)+H_2O(l)[/tex]

Because all atoms are in the same amount at each side of the equation and the resulting salt is soluble.

2. The balanced chemical reaction is:

[tex]2HI(aq)+Sr(OH)_2(aq)\rightarrow SrI_2(aq)+2H_2O(l)[/tex]

Because all atoms are in the same amount at each side of the equation and the resulting salt is soluble.

Best regards!

Having a greater volume definitely means a lower concentration (molarity) of solution. So, the statement is true.

Molarity of a solution is defined as the number of moles of solute present per unit volume of solution.

Here,

Since, the number of moles of solute in one litre of solution is known as the molarity, we can say that the change in volume of the solution will affect the molarity of the solution.

Molarity, M = n/V

where n is the number of moles of solute and V is the volume of solution

From the equation, we can say that the molarity of the solution is inversely proportional to its volume.

We know that, molarity of a solution is a temperature dependent parameter.

As the volume of the solution increases, the temperature also increases( Volume [tex]\alpha[/tex] Temperature). When the temperature increases, it affects the molarity of the solution such that the number of moles remains constant and as a result of the increasing volume, the molarity decreases.

Hence,

Having a greater volume definitely means a lower concentration (molarity) of solution.

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Answer

PubChem CID/molecular formula

Explanation:

Cesium bromide

PubChem CID 24592

Molecular Formula CsBr or BrCs

Synonyms CESIUM BROMIDE 7787-69-1 Caesium bromide Cesiumbromide Cesium bromide (CsBr) More...

Molecular Weight 212.81 g/mol

Component Compounds CID 260 (Hydrogen bromide) CID 5354618 (Cesium)

have a good day /night

may i please have a branllist

Answer:

[tex]V_2=52.2L[/tex]

Explanation:

Hello there!

In this case, by bearing to to mind the given conditions, it is firstly possible to determine the initial volume of the closed system via the ideal gas equation:

[tex]PV=nRT\\\\V=\frac{2.00mol*0.08206\frac{atm*L}{mol*K}*298.15K}{1.00 atm} \\\\V=48.9L[/tex]

Which is V1 in the Charles' law:

[tex]\frac{T_2}{V_2} =\frac{T_1}{V_1}[/tex]

And of course, T1 is 298.15 (25+273.15). Therefore, by solving for V2 as the final volume, we obtain:

[tex]V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{48.9L*(45+273.15)K}{(25+273.15)K} \\\\V_2=52.2L[/tex]

Best regards!

Answer:

It will go to your hand.

Explanation: If you touch a hot cup/mug you'll most likely burn yourself, so it would probably go to your hand.

Answer:

yes

Explanation:

its an endothermic chemical reaction

Answer:

It is a chemical reaction because you cannot get back the original ingredients. if you can get the original ingredients back, it would be a physical change.

Hope this helped you out!!

Answer:

63.25 grams of CO₂

Explanation:

To convert from liters to grams, we first need to convert from liters to moles. To do this, we divide the liters by 22.4, the amount of liters of a gas per mole.

32.2 / 22.4

= 1.4375 moles of CO₂

Now we want to convert from moles to grams. To do this, we multiply the moles by the molar mass of CO₂. The total molar mass can be found on the periodic table by adding up the molar mass of carbon (12) and two oxygen (32).

12 + 32 = 44

Now we want to multiply the moles by the molar mass.

1.4375 • 44

= 63.25 grams of CO₂

This is your answer.

Hope this helps!

Answer:

thanks

Explanation:

Answer:

Magnetic susceptibility is the degree to which a material can be magnetized in an external magnetic field. If the ratio between the induced magnetization and the inducing field is expressed per unit volume, volume susceptibility (k) is defined as.

Explanation:

good luck

Answer:

20. Mg(NO3)2

21. KClO3

22. CaSO4

23. (NH4)2SO4

24. HC2H3O

25.  CO is carbon dioxide, which is neutral and would not combine with a hydrogen ion. Did you mean H and CO3(2-)? That would be H2CO3 (carbonic acid)

Explanation:

You have to match the charges of the Cations and Anions.

Answer:

7.14%

Explanation:

From the question,

percentage by mass hydrogen in C₄H₈O₃ (h)   = mass of hydrogen present in C₄H₈O₃(m)/molar mass of C₄H₈O₃ (m')

h = (m'/m)×100..................... Equation 1

Given: m' = (14×4)+(1×8)+(16×3) = 56+8+48 = 112 g, m =  (1×8) = 8 g

Substitute these values into equation 1

h = (8/112)×100

h = 7.14%.

Hence the percentage of hydrogen in 70 g of C₄H₈O₃ is 7.14%

Answer:

[tex][NO_2]=0.112M[/tex]

Explanation:

Hello there!

In this case, since the second-order integrated law is given by the following equation:

[tex]\frac{1}{[NO_2]} =\frac{1}{[NO_2]_0}+kt[/tex]

Thus, given the initial concentration of the nitrogen dioxide gas, the rate constant and the elapsed time, we obtain:

[tex]\frac{1}{[NO_2]}= \frac{1}{0.477M} +0.54M^{-1}s^{-1}\\\\\frac{1}{[NO_2]}=8.933M^{-1}[/tex]

[tex][NO_2]=\frac{1}{8.933M^{-1}} =0.112M[/tex]

Best regards!

Answer:

2c11h21

Explanation:

Answer:

0.0542 M

Explanation:

Let;

CA = concentration of Ce4+ solution = 0.1741 M

VA = volume of Ce4+ solution = 18.68 mL

CB = concentration of H3AsO3 = ?

VB  = volume of H3AsO3 = 30.00 mL

NA = Number of moles of Ce4+ solution = 2

NB = Number of moles of H3AsO3  = 1

From;

CAVA/CBVB = NA/NB

CAVANB = CBVBNA

CB = CAVANB/VBNA

CB = 0.1741 * 18.68 * 1/30.00 * 2

CB = 0.0542 M

Answer:

Due presence of empty as well as heavy particles.

Explanation:

The main reason for this is the presence of empty spaces as well as heavy particles in the nucleus of Helium atom. Most of the beam pass through the helium atom due to the presence of empty spaces in the atom whereas some beams deflect from the helium atom because both repel each other due to same charge i.e. positive charge. Few beams of light bounce back with an angle of 90 degree due hitting with the nucleus where heavy particles such as neutron and proton are present.

Answer:

k

Explanation:

Answer:

(C) when bonds in food are broken, energy is released