HELP ASAP PLEASE
Outline a sample experiment you could set up to investigate the effect of drinking Starbucks on student test scores. List all components in the 2nd objective above.

ANSWER: It's (ii) I do believe

The sugar is fermented and the ethanol and carbon dioxide are produced. The fermentation of ethanol is used in bread baking and the fermentation found in grapes makes beer.

Fermentation is the mechanism by which sugar is converted into alcohol. Ethanol Fermentation can be described as a biological process that converts sugars such as glucose, sucrose, and fructose into cellular energy by producing ethanol and carbon dioxide as a side effect.

Alcoholic fermentation is called anaerobic since yeast conducts this transformation in the absence of oxygen. The fermentation of ethanol has applications such as the manufacture of alcoholic drinks, ethanol fuel manufacture, and bread baking.

Fermentation of the natural sugars can be seen in grapes creating wine or beer as well as in apples and pears producing cider and Perry, respectively. Alcoholic fermentation takes place in species of fish, where it offers energy when oxygen is scarce.

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Answer:

All unauthorized experiments are prohibited. You are allowed to enter the chemical preparation/storage area any time you need to get an item. Laboratory aprons should be worn during all lab activities. It's okay to pick up broken with our bare hand as long as the glass is placed in the trash.

Explanation:

Answer:

Explanation: Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material. Filtration separates solids of different sizes.

The technique(s) that can be used to remove one solid from a mixture of solids is chromatography.

On a solid medium, chromatography uses solvent separation. Different boiling points are used in distillation.

A liquid is removed through evaporation from a solution to leave a solid behind. Different-sized particles are divided using filtration. Additionally, it can be employed as a purification method to separate a mixture's constituent parts for use in other operations or studies.

There are four main types of chromatography.

Therefore, Chromatography is one or more of the methods that can be used to separate a single solid from a mixture of solids.

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Answer : The identity of the substance is gypsum.

Explanation : Given,

Mass of weighing boat = 2.69 g

Mass of unknown pieces including weighing boat = 18.01 g

Initial volume = 25.7 mL

Final volume = 32.3 mL

First we have to calculate the mass of unknown pieces.

Mass of unknown pieces = Mass of unknown pieces including weighing boat - Mass of weighing boat

Mass of unknown pieces = 18.01 g - 2.69 g

Mass of unknown pieces = 15.32 g

Now we have to calculate the volume of unknown pieces.

Volume of unknown pieces = Final volume - Initial volume

Volume of unknown pieces = 32.3 mL - 25.7 mL

Volume of unknown pieces = 6.6 mL

Now we have to calculate the density of unknown pieces.

[tex]\text{Density of unknown pieces}=\frac{\text{Mass of unknown pieces}}{\text{Volume of unknown pieces}}[/tex]

Now putting all the given values in this formula, we get:

[tex]\text{Density of unknown pieces}=\frac{15.32g}{6.6mL}[/tex]

[tex]\text{Density of unknown pieces}=2.32g/mL[/tex]

From the given table we conclude that the unknown piece is gypsum whose density is 2.32 g/mL.

Therefore, the identity of the substance is gypsum.

The material with the density equivalent to the unknown piece has been Gypsum. Thus, the unknown piece has been gypsum.

Density can be defined as the mass of the substance per unit volume.

To calculate the density of the unknown piece, the mass has been calculated as:

Mass of unknown piece = Mass of weighing boat with the unknown piece - Mass of weighing boat

Mass of unknown piece = 18.01 g - 2.69 g

Mass of unknown piece = 15.32 grams.

The volume of the unknown piece can be calculated as:

The volume of unknown piece = Final volume - Initial volume

The volume of the unknown piece = 32.3 mL - 25.7 mL

The volume of the unknown piece = 6.6 mL.

The density can be expressed as:

Density = [tex]\rm \dfrac{Mass}{Volume}[/tex]

The density of the unknown piece = [tex]\rm \dfrac{15.32\;g}{6.6\;ml}[/tex]

The density of the unknown piece = 2.32 g/mL.

From the given set of pieces, the material with the density equivalent to the unknown piece has been Gypsum. Thus, the unknown piece has been gypsum.

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Answer:

D is the answer

Explanation:

distillation

Answer:

distillation

Explanation:

Answer:

²⁵ Mg = 10.00%

²⁶ Mg = 11.0%

Explanation:

Given that:

Magnesium ²⁴Mg has an abundance of 78.99%

Hence, (100 - 78.99)% = 21.01%

21.01% is the abundance of ²⁵ Mg and ²⁶ Mg

Suppose,

²⁵ Mg = x

²⁶ Mg = (21.01 - x)%

Then;

avg. atomic mass = [tex]\dfrac{78.99}{100 }(23.9850)+\dfrac{x}{100}(24.9858) +\dfrac{21.01-x}{100}(25.9826)[/tex]

where the avg. atomic mass = 24.3050

∴

[tex]24.3050 \times 100 = {78.99}(23.9850)+\dfrac{x}{100}(24.9858) +\dfrac{21.01-x}{100}(25.9826)[/tex]

2430.5 = 2440.46915 -0.9968 x

0.9968x = 2440.46915 - 2430.5

0.9968x = 9.96915

x  =  9.96915/0.9968

x  =  10.00%

∴ Recall that:

²⁵ Mg = x

²⁶ Mg = (21.01 - x)%

²⁵ Mg = 10.00%

²⁶ Mg = (21.01 - 10.00)%

²⁶ Mg = 11.0%

The natural abundances of the other two isotopes, that is, Mg-25 and Mg-26 are 10% and 11.01%.

It is the abundance of isotopes of a chemical element as naturally found on a planet.

Based on the given information:

Now the natural abundance of all the isotopes of Mg is 100%.

Mg-24 + Mg-25 + Mg-26 = 100

Mg-25 + Mg-26 = 100-78.99

Mg-25 + Mg-26 = 21.01

Now let us assume that Mg-25 is x% then Mg-26 will be (21.01% -x).

Now,

Average atomic mass of Mg = [(Natural abundance of Mg-24) × (isotopic mass of Mg-24) + (Natural abundance of Mg-25) × (Isotopic mass of Mg-25) + (Natural abundance of Mg-26) × (Isotopic mass of Mg-26)]

Putting the values we get,

24.3050 amu = (78.99% × 23.9580 amu) + (x% × 24.9858 amu) + (21.01% - x%) × 25.9826 amu

24.3050 amu = 18.9458 + 24.9858 × x + 5.4589 - (25.9826x)

24.3050 = 24.4047 - (0.9968x)

0.9968x = 24.4047 - 24.3050

x = 0.1000

x = 10%

The natural abundance of Mg-25 is 10%.

The natural abundance of Mg-26 = 21.01% - x% = 21.01% - 10% = 11.01%.

Thus, the natural abundances of the other two isotopes are 10% and 11.01%.

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Answer:

5.46x[tex]10^{8}[/tex]

Explanation:

just move the decimal however many places to the left until there is only one digit to the left of it and then square the ten by that number

Answer:

the answer will be protons neutrons and electrons:)

Explanation:

Explanation:

K+ ion has 18 electrons and Argon also has 18 electrons so they do have the same electronic structure.

However, Al3+ ion has 10 electrons and Argon has 18 electrons, so they do not have the same electronic structure.

Answer:

Try using this formula so useful.

Explanation:

Particles = atoms/molecules etc.

A= is your given

B= is what you want

Answer:

C

Explanation:

Measurements are always specific numerical values that you observe. Taking your temperature results in a number. Reading your watch results in a specific time that you get. Weighing a cantaloupe results in a specific measurement in kilograms or pounds. Asking the weather will result in an answer, like sunny or rainy, which aren't specific numerical values.

The following is not an example of making a measurement is asking for weather as it depends on weather reports. option C is correct.

A  weather report is what  tells you about the high and low temperatures for the past day o weather the rain is going to happen or not which can be predict only.

Weather report also tells you the present temperature of the day and may  tell you the average temperature for the day which can only be predict cannot be measured in any aspect.

Therefore, following is not an example of making a measurement is asking for weather as it depends on weather reports. option C is correct.

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Answer:

ill say a

Explanation:

it make the most cense

They can only be monoatomic.

Nearly all elements form monatomic gases at extremely high temperatures or when exposed to enough radiation because there's too much kinetic energy for bonds to form or the energy breaks chemical bonds between atoms.

There are seven diatomic elements given below

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The answer to your question is:

Answer:

A. Particles are parked closely together in an organized way and maintain their size, shape and volume.

Explanation:

These are some characteristics of a solid;

✨Thanks!!!!❤✨

Answer:

29

Explanation:

$1=4 quarters

$7 = 28 quarters ( multiply 7 times 4)

.25 = 1 quarter

add 28 and 1

Answer:29

Answer:

B- 0.1875 is denser.

hope this helps

Answer:

Explanation:

Chemistry is derived from Alchemy. Alchemy is derived from al-chemiya, Kimiya is an Arabic word.

Chemistry is branch of science that involves study of structure of atoms and molecules, investigation of their properties , the changes that occur during chemical reactions and using the chemical reactions to form new substances. It has five branches: Analytical, Organic, Inorganic, Physical and Biochemical.

Answer:

THE VOLUME OF THE BALLOON IS 1.45 L

Explanation:

At sea level:

Volume = 2 L

Pressure = 1 atm

Temperature = 12 °C

At 30000 ft altitude:

Pressure = 0.30 atm

Temperature = -55°C

Volume = unknown

Using the general gas formula:

P1 V1 / T1 = P2 V2 / T2

Re-arranging the formula by making V2 the subject of the equation, we have;

V2 = P1 V1 T2 / T1 P2

V2 = 1 * 2 * 12 / 0.30 * 55

V2 = 24 / 16.5

V2 = 1.45 L

The volume of the balloon at the temperature of -55 C and 0.30 atm is 1.45 L

Answer:

Bin 1 points to a carbon bonded to a double bonded carbon and single bonded to two hydrogens. --- trigonal planar, tetrahedral

Bin 2 points to a carbon double bonded to a carbon and single bonded to a carbon and one hydrogen.------- trigonal planar, tetrahedral

Bin 3 is a carbon single bonded to two carbons and single bonded to two hydrogens. ----- tetrahedral, tetrahedral

Bin 4 is the same as bin 3.--------tetrahedral, tetrahedral

Bin 5 is a carbon triple bonded to a carbon and single bonded to a carbon.---- linear, tetrahedral

Bin 6 is triple bonded to a carbon and single bonded to a hydrogen.---linear, tetrahedral

Explanation:

A single C-C or C-H bond is in a tetrahedral geometry, the carbon atom is bonded to four species with a bond angle of 109°.

A C=C bond is trigonal planar with a bond angle of 120°.

Lastly, a C≡C bond has a linear geometry with a bond angle of 180° between the atoms of the bond.

Answer:

its 459 L

Explanation:

Answer:

5.   the total density of the mixture = 3.415 x 10^3 g/mL

6.  the number of sulfur atoms in the compound =  2 x 10^24

Explanation:

5.

given:

density of a substance is 3.4 x 10^3 g/mL

Mixing it with another substance increases the density by 1.5 x 10^1 times.

find:

What is the density of the mixture?​

-------------------------------------------------

let density (a) = 3.4 x 10^3 g/mL

density(b) = 1.5 x 10^1 g/mL

since there is no specific density provided for the mixture, we then add both to increase the density,

total density = density(a) + density(b)

total density = 3.4 x 10^3 g/mL + 1.5 x 10^1 g/mL

total density = 3.415 x 10^3 g/mL

therefore,

the total density of the mixture = 3.415 x 10^3 g/mL

===============================================

6.

given:

A compound contains atoms of sulfur and iron.

There are 3.6 X 10^20 atoms of iron in the compound.

find:

Divide the no of iron atoms by 1.8 X 10^- 4 to find the number of sulfur atoms in the compound?​

-------------------------------------------------

iron = 3.6 x 10^20  ⇒ to divide 1.8 X 10^- 4

sulfur atoms = 3.6 x 10^20    =  2 x 10^24

                         1.8 X 10^- 4

therefore,

the number of sulfur atoms in the compound =  2 x 10^24

===================================================

Answer:

5.   the total density of the mixture = 3.415 x 10^3 g/mL

6.  the number of sulfur atoms in the compound =  2 x 10^24

Explanation:

i got them correct on exam

Answer:

vznzbzvbajavavsytttuydr

Answer:

The answer is C. Tellurium.

Explanation: If you look at the periodic table, tellurium is shown to have the greatest atomic mass. It is calculated easily. The answer is right on edge 2020.

Tellurium is the element having highest atomic mass.

Tellurium is the element has the greatest average atomic mass followed by iodine, krypton and bromine. The atomic mass of Tellurium is 127.6 u, the atomic mass of iodine is 126.9 u, the atomic mass of krypton is 83.8 u and the atomic mass of bromine is 79.9 u so on the basis of given data we can say that tellurium is the element that has the highest atomic mass or mass number.

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Answer:

The scientific method attempts to minimize the influence of bias or prejudice in the experimenter. Even the best-intentioned scientists can't escape bias. ... That's the job of the scientific method. It provides an objective, standardized approach to conducting experiments and, in doing so, improves their results.

Explanation:

The Scientific Method is simply a framework for the systematic exploration of patterns in our world. It just so happens that this framework is extremely useful for the examination of chemistry and its many questions.

Answer:

 true.

Explanation:

Answer:

The raccoon drank 120 ml of water.

Explanation:

All you have to do is take the 360 ml of water and to find what 1/3 of it is you divide 360 by 3 to get 120 ml of water.

Hope that helps and have a great day!

Answer:c

Explanation:

I put a and got it wrong and c was correct

J.J. Thomson gave the plum pudding model for the atomic structure. The model represents the plums by electrons and pudding as large positively charged masses. Thus, option c is correct.

The Plum pudding model was given by J.J. Thomson to represent the sub-atomic particles of the atom and their distribution. The plum was used to depict the electrons that carried a negative charge.

The pudding represented the protons that were present like the sea and covered the whole atom. The protons carried a positive charge and according to the model were distributed fully in the atom.

It was an important discovery and model that gave rise to more accurate models. The model proposed the presence of the electrons that later were considered of crucial importance.

Therefore, option c. the plum is electron embedded in the pudding of the protons.

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Answer:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Explanation:

hope that helps