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If you are holding a really hot cup of hot chocolate, the heat from the mug will transfer to your hand.

Question 6 options:
True
False

Answer: An experimental group is a test sample or the group that receives an experimental procedure.

Explanation: This group is exposed to changes in the independent variable being tested. The values of the independent variable and the impact on the dependent variable are recorded. An experiment may include multiple experimental groups at one time.

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Answer:

[tex]m_{solute}=0.78gCH_2 (CO_2 H)_2[/tex]

Explanation:

Hello.

In this case, for the given volume and molarity of malonic acid (solute), we can compute the mass by first computing the moles considering the definition of molarity:

[tex]M=\frac{n_{solute}}{V_{solution}} \\\\n_{solute}=M*V_{solution}=0.15mol/L*50.00mL*\frac{1L}{1000mL}\\ \\n_{solute}=0.0075molCH_2 (CO_2 H)_2[/tex]

Then, since the molar mass of the malonic acid is 104.1 g/mol, we can compute the required mass in g of malonic acid for the preparation of that solution as shown below:

[tex]m_{solute}=0.0075molCH_2 (CO_2 H)_2*\frac{104.1gCH_2 (CO_2 H)_2}{1molCH_2 (CO_2 H)_2}\\ \\m_{solute}=0.78gCH_2 (CO_2 H)_2[/tex]

Notice that the shortest number is the molarity (0.15 M) with two significant figures, that is why the answer is displayed with two significant figures too.

Regards.

When temperature of fluid increases, kinetic energy increases, viscosity decreases and the fluid flows faster.

When temperature of a fluid decreases, kinetic energy decreases, viscosity increases and the fluid flows slower.

When temperature of a fluid stays the same, kinetic energy stays the same, viscosity stays the same and the fluid flow stays the same.

Viscosity is the friction that exist between the internal layers of a fluid in motion.

Viscosity decreases with temperature due to the increase in the kinetic energy of the molecules of the fluid.

Based on the relationship between temperature, kinetic energy and viscosity:

Therefore, it can be concluded that viscosity of a fluid depends on temperature.

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The pH of the solution in which one normal adult dose aspirin is dissolved is :  2.7

Given data :

mass of aspirin = 640 mg = 0.640 g

volume of water = 10 ounces = 0.295735 L

molar mass of aspirin = 180.16 g/mol

moles of aspirin = mass / molar mass = 0.00355 mol

First step : calculate the concentration of aspirin

= moles of Aspirin / volume of water

= 0.00355 / 0.295735

= 0.012 M

Given that pKa of Aspirin = 3.5

pKa = -logKa

therefore ; Ka = [tex]10^{-3.5}[/tex] = [tex]3.162 * 10^{-4}[/tex]

From the Ice table

[tex]3.162 * 10^{-4}[/tex] = [tex]\frac{x + H^+}{[aspirin]}[/tex]  = [tex]\frac{x^{2} }{0.012-x}[/tex]

given that the value of Ka is small we will ignore -x

x² = [tex]3.162 * 10^{-4} * 0.012[/tex]

x = [tex]1.948 * 10^{-3}[/tex]  

Therefore

[ H⁺ ] = [tex]1.948 * 10^{-3}[/tex]

given that

pH = - Log [ H⁺ ]

     = - ( -3 + log 1.948 )

     = 2.71 ≈ 2.7

Hence we can conclude that The pH of the solution in which one normal adult dose aspirin is dissolved is :  2.7

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Answer:

After 90 minutes 5.15625 g amount left from total of 165 g.

Explanation:

Given data:

Technetium-104 half life = 18.0 min

Total amount of sample = 165 g

Amount left after 90.0 min = ?

Solution:

First of all we will calculate the number of half lives passes.

Number of half lives = T elapsed / Half life

Number of half lives = 90 min /18.0 min

Number of half lives =  5

Amount left:

At time 0 = 165 g

At first half life = 165 g/ 2= 82.5 g

At 2nd half life = 82.5 g/2  = 41.2 g

At 3rd half life = 41.2 g/ 2 = 20.625 g

At 4th half life =  20.625 g/ 2  = 10.3125 g

At 5th half life = 10.3125 g /2 = 5.15625 g

Thus, after 90 minutes 5.15625 g amount left from total of 165 g.

Answer:

The trans/trans stereoisomer.

Explanation:

So, we are going to have two stereoisomers or arrangements for this chemical compound, that is the Cis/trans, the trans/trans.

For a compound to be seen with UV, the main or primary condition is conjugation or how conjugated the chemical specie or compound is.

Thus, the more the conjugation, the more or the higher the wavelength or lands value.

=> The Trans/trans stereoisomer will have the highest lamda value or wavelength because the energy gap in its π - π* Transitioning deceases due to the STERIC interactions, and the more the decrease in the energy gap, the more or the higher the lamda value or wavelength.

Answer:

Explanation:

the conversion of 77 Killopascal to millimetre of mercury is

577.547 millimetre of mercury.

Answer:

acidic

Explanation:

Answer:

Molar mass = 135.2 g/mol

Explanation:

Given data;

Mass of gas = 6.03 g

Volume of gas = 1.00L

Temperature = standard = 273 K

Pressure = Standard = 1 atm

Molar mass of gas = ?

Solution:

First of all we will calculate the number of moles of gas.

Formula

PV = nRT

1 atm ×  1.00L = n × 0.0821 atm.L/k.mol × 273 K

1.00 atm.L = n × 22.414  atm.L/mol

n = 1.00 atm.L/22.41  atm.L/mol

n = 0.0446 mol

Molar mass:

Molar mass = mass/number of moles

Molar mass = 6.03 g/0.0446 mol

Molar mass = 135.2 g/mol

Answer:

The study of meteorites has helped us understand the beginnings of our solar system, how planets and asteroids formed and how impacts of large meteorites have altered Earth's history and life on our planet.

Explanation:

Answer:

Electromagnetic

Explanation:

Hope this helps

Answer:

collection

Explanation:

Answer:

Leon

Explanation: all take up space and will have a mass to it.

it represents the maximum population size a particular environment can support

Answer:

I think its reliable

Explanation:

Answer: The Answer is Up To Date

Explanation:

Answer:

which affect does the industrial wastewater have on acidity of oceans ?

Answer:

which affect does the industrial wastewater have on acidity of oceans ?

Explanation:

Answer:

Groups

Explanation:

A "family" on the periodic table is also called a "group".

A "group" or a "family" of elements are elements of the same type on the periodic table, for example, all of the transition metals on the periodic table are a "group" or a "family".

Answer:

Zymogen ActivationZymogens are activated by snipping the bonds between two or more amino acids, rather like cutting a balloon string so that it floats away. When the bonds are cut, the enzyme changes its conformation, its 3-D structure, so that the active site is free and able to become active.

Explanation:

Answer:

Density is 0.34

Explanation:

D=m/V

Density is equal to mass divided by volume.

so 8.7 divided by 25.4 is equal to 0.34. The density of that object is 0.34

First we need the molar mass of NaNO_3:-

[tex]\\ \sf\longmapsto 23+14+3(16)[/tex]

[tex]\\ \sf\longmapsto 37+48[/tex]

[tex]\\ \sf\longmapsto 85g/mol[/tex]

Now we need moles of NaNO_3

[tex]\\ \sf\longmapsto No\:of\:moles=\dfrac{Given\:mass}{Molar\:mass}[/tex]

[tex]\\ \sf\longmapsto No\:of\:moles=\dfrac{65}{85}[/tex]

[tex]\\ \sf\longmapsto No\:of\:moles=0.765mol[/tex]

Now

[tex]\\ \sf\longmapsto Molarity=\dfrac{Moles\:of\:solute}{Vol\:of\:soln.\:in\:L}[/tex]

[tex]\\ \sf\longmapsto Molarity=\dfrac{0.765}{0.350}[/tex]

[tex]\\ \sf\longmapsto Molarity=2.2M[/tex]

Answer:

what are the words? I don't see it

The one that is not a reason humans need to stay hydrated is to provide vitamin C to the body.

Dehydration occurs when you do not drink enough fluid or lose more fluid than you take in.

Sweating, tears, vomiting, urine, or diarrhea all cause fluid loss. The severity of dehydration is affected by a variety of factors, including climate, level of physical activity, and diet.

Dehydration symptoms include dark urine, decreased urination, headaches, fatigue, dry skin, decreased skin turgor, and poor concentration. Drink plenty of water or other fluids every day to ensure you're getting enough fluids.

Milk, according to research, is one of the best beverages for hydration, even better than water or sports drinks. Milk's natural electrolytes, carbohydrates, and protein are credited with its effectiveness, according to researchers.

Proper water content will aid in removal of waste, maintaining temperature, lubrication, and many more.

Thus, the correct option is D.

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Answer:

The metal which reduces the other compound is the one higher in reactivity. So in this case, it is.

Explanation:

The assessments of the given statements on the nature of the fluids and

the fractional distillation processes are as follows;

a. TRUE

b. TRUE

c. FALSE

d. A fractionating column is a glass piece that contains metal pieces or glass beads

Option a.

Multiple vaporization-condensation cycles enhances the separation of

the components of the mixture;

Thereby enabling purification of the samples that have boiling points

that are close.

Option a is therefore; TRUE

Option b.

The Height Equivalent to Theoretical Plate, HETP, indicates the

efficiency of the separation, and the fractionating column.

Therefore, option b. is TRUE

Option c.

After every condensation-vaporization cycle, the condensate contains

more of the more volatile, component and the vapor be comes enriched

in the lower boiling point component.

Therefore, option c is FALSE

Option d.

d. The location of a fractionating column is placed vertically between the

mixture to be separated and the 'Y' adaptor, and consist of a straight

tube containing pieces of metals or glass beads.

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Molar mass P2O5 = 31 x 2 + 16 x 5 => 142 g/mol

142 g ---------------- 6.02 x 10²³ molecules

0.930g g ------------ ( molecules )

molecules = 0.920 x ( 6.02 x 10²³ ) / 142

molecules = 5.53 x 10²³ / 142

= 3.89 x 10²¹ molecules

1 molecule P2O5 -------------------------- 7 atoms

3.89 x 10²¹ molecules -------------------- ( atoms )

atoms = ( 3.89 x 10²¹) x 7 / 1

atoms = 2.72 x 10²² atoms of P2O5

2.72 x 10²² atoms of P₂O₅ are there in 0.930 g of  P₂O₅.

Molar mass P₂O₅ = 31 x 2 + 16 x 5 => 142 g/mol

142 g atoms are present in 6.02 x 10²³ molecules

Therefore, total number of molecules in 0.930g of atoms is calculated as-

molecules = 0.930 x ( 6.02 x 10²³ ) / 142

molecules = 5.53 x 10²³ / 142

= 3.89 x 10²¹ molecules

1 molecule of P₂O₅ contains 7 atoms

Therefore, the number of atoms in 3.89 x 10²¹ molecules is calculated as

atoms = ( 3.89 x 10²¹) x 7 / 1

atoms = 2.72 x 10²² atoms of  P₂O₅

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Answer:

Answer:

2C⁸H¹⁸+ 25O² => 16CO² + 18H²O

It can also be written as;

C⁸H¹⁸ + 25/2 O² => 8CO² + 9H²O