Question 3 Multiple Choice Worth 1 points)
(01.06 MC)
The contents of two beakers are described in the table.
Contents of Beakers
Beaker
Contents
Final Substance Formed
х
sugar, water sugar not visible in water
Y
sand, water sand settled at the bottom of the beaker
Which statement is true about the final substances formed in the beakers?
The final substances in both the beakers are mixtures.
The final substances in both the beakers are pure substances.
The final substance in Beaker X is a pure substance and in Beaker Y is a mixture.
The final substance in Beaker X is a mixture and in Beaker Y is a pure substance.

Answer:

It would most likely just change their color

Explanation: The frequency of dark-coloured moths increased at that time, an example of industrial melanism. Later, when pollution was reduced, the light-coloured form again predominated. ... The dark-coloured or melanic form of the peppered moth

If pollution near factories was reduced, then this situation increased the frequency of white moths.

Industrial melanism is an evolutionary feature associated with the increase of dark moths in industrial polluted areas.

In conclusion, if pollution near factories was reduced, then this situation increased the frequency of white moths.

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Answer:

There are 0.1387 moles of oxygen atoms.

Explanation:

First we calculate how many moles of ammonium phosphate there are:

Finally we calculate how many moles of oxygen atoms are there in 0.312 moles of (NH₄)₃PO₄:

Thus there are (0.0347 mol (NH₄)₃PO₄ * [tex]\frac{4molO}{1mol(NH_4)_3PO_4}[/tex] ) 0.1387 moles of O.

The number of moles of oxygen atoms in the sample is 0.1388 mole

We'll begin by calculating the number of mole of (NH₄)₃PO₄ that contains 0.104 mole of N. This can be obtained as follow:

3 moles of N is present in 1 mole of (NH₄)₃PO₄.

Therefore,

0.104 mole of N will be present in = 0.104 / 3 = 0.0347 mole of (NH₄)₃PO₄.

1 mole of (NH₄)₃PO₄ contains 4 mole of O.

Therefore,

0.0347 mole of (NH₄)₃PO₄ will contain = 0.0347 × 4 = 0.1388 mole of O

Thus, the number of moles of oxygen atoms in the sample is 0.1388 mole.

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Explanation:

2.04 % hydrogen

32.65% sulphur

65.31% is oxygen

atomic ratio

hydrogen =2.04÷1=2.04

sulphur =32.65÷32=1.02

oxygen =65.31÷16=4.08

simplest ratio

hydrogen = 2.04÷1.02=2

sulphur =1.02÷1.02=1

oxygen =4.08÷1.02=4

empirical formula is H2SO4

Answer:

30 miles per hour North

Explanation:

Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.

Mathematically, velocity is given by the equation;

[tex]Velocity = \frac{distance}{time}[/tex]

[tex]V = \frac{d}{t}[/tex]

Hence, 30 miles per hour North is an example of a velocity because it is a vector quantity that has both magnitude and direction.

Answer:

an emotional appeal to emphasize the United States' commitment to justice

Explanation:

The main type of appeal that Kennedy uses in this excerpt is an emotional appeal to emphasize the United States' commitment to justice. Therefore, option B is correct.

In rhetoric, an appeal is a persuasive approach used to persuade an audience to believe or do something. Appeals can take many forms, but they generally fall into three categories: pathos, ethos, and logos.

Pathos appeals to the audience's emotions, ethos appeals to the credibility of the speaker or source, and logos appeals to the audience's sense of logic and reason.

Effective communication usually involves the use of multiple appeals to convince the audience to accept a particular perspective or take a particular action. Therefore, option B is correct.

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Answer:

very comfusing

Explanation:

Answer:

C₄H₆O₃ + H₂O ⇒ 2C₂H₄O₂

Explanation:

Given:

C₄H₆O₃ + H₂O ⇒ C₂H₄O₂

Find:

Balance equation

Computation:

C₄H₆O₃ + H₂O ⇒ C₂H₄O₂

C₄H₆O₃ + H₂O ⇒ 2C₂H₄O₂

Number of atom should be equal in LHS and RHS.

So,

We have to multiply 2 in RHS to get equal number of atom.

Answer:

Empirical formula = CH3O

Molecular formula = C2H6O2

Answer:

yea i do

Explanation:

LETSSS GOOOOOO

Answer:

[tex]\frac{1}{-1} \frac{d[A]}{dt} =\frac{1}{-3} \frac{d[B]}{dt}=\frac{1}{1} \frac{d[C]}{dt}=\frac{1}{2} \frac{d[D]}{dt}[/tex]

[tex]\frac{d[A]}{dt} =-0.9\frac{mol}{dm^3*s} \\\\ \frac{d[C]}{dt} =0.9\frac{mol}{dm^3*s}\\\\ \frac{d[D]}{dt} =1.8\frac{mol}{dm^3*s}[/tex]

Explanation:

Hello!

In this case, since the reaction rate for all the species are written by considering how they change and the coefficients they have in the reaction, for A, B, C and D we can write:

[tex]\frac{1}{-1} \frac{d[A]}{dt} =\frac{1}{-3} \frac{d[B]}{dt}=\frac{1}{1} \frac{d[C]}{dt}=\frac{1}{2} \frac{d[D]}{dt}[/tex]

Whereas the numeric denominators stand for the coefficients balancing the reaction. In such a way, by using the rate of consumption of B, we can compute the rate of consumption of A and the rates of formation of both C and D as follows:

[tex]\frac{d[A]}{dt} =\frac{-1}{-3} \frac{d[B]}{dt}=\frac{1}{3}*-2.7\frac{mol}{dm^3*s} \\\\ \frac{d[A]}{dt} =-0.9\frac{mol}{dm^3*s} \\\\\\ \frac{d[C]}{dt} =\frac{1}{-3} \frac{d[B]}{dt}=\frac{1}{-3}*-2.7\frac{mol}{dm^3*s} \\\\ \frac{d[C]}{dt} =0.9\frac{mol}{dm^3*s}\\\\\\ \frac{d[D]}{dt} =\frac{2}{-3} \frac{d[B]}{dt}=\frac{2}{-3}*-2.7\frac{mol}{dm^3*s} \\\\ \frac{d[D]}{dt} =1.8\frac{mol}{dm^3*s}[/tex]

Whereas the rates of consumption are negative and the rates of formation positive.

Best regards!

Answer:

3. 2.00 L of air at 100°C has twice the pressure of the same 2.00 L of air at  50°C

Explanation:

3. 2.00 L of air at 100°C has twice the pressure of the same 2.00 L of air at  50°C

This is correct;

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles thus, by increasing the temperature pressure is also goes to increase in the same ratio.

All other options are incorrect,

1)  doubling the pressure of a gas doubles its volume

This is incorrect because by increasing the pressure volume is going to be decreased.

2)  2.00 L of air at 227°C has twice the pressure of the same 2.00 L of air at  23°C

This is also incorrect because 2 L air at 227 °C will have the pressure more than twice time as compared to the 2L air at 23°C.

4. halving the pressure of a gas halves its volume

This is incorrect because halving the pressure of gas increasing its volume.

Answer:

Wave 2

Explanation:

Higher frequency  means more energy per second, And wave 2 has higher frequesncy

please mark brainliest I’m almost at expert level

Answer:

I believe it is wave 2

Explanation:

As you can see in the graph, wave two happens to be more frequent. There are well, more waves than the first graph. Please forgive me if I am wrong. I tried my best to explain

Answer:

295 mL

Explanation:

Given data:

Volume needed = ?

Molarity of solution = 0.193 M

Mass of salt = 7.90 g

Solution:

Molarity =  number of moles of solute / volume in L

Number of moles of salt = mass/molar mass

Number of moles of salt = 7.90 g/ 138.205 g/mol

Number of moles = 0.057 mol

Volume needed:

Molarity = number of moles / volume in L

0.193 M = 0.057 mol / volume in L

Volume in L = 0.057 mol /  0.193 M

Volume in L = 0.295 L

L into mL

0.295 L × 1000 mL/1L

295 mL

Answer:

I am not able to click anything above!

Explanation:

A colloid is a heterogeneous mixture whose particle size is intermediate between those of a solution and a suspension. The dispersed particles are spread evenly throughout the dispersion medium, which can be a solid, liquid, or gas.

A single bond contains two shared electrons.

Number of doses needed : 4 doses

Given

weight of the child : 25 kg

Treatment of Benadryl : 5 mg/kg weight

The concentration of Benadryl : 12.5 mg/5 ml

1 dose = 12.5 ml

Required

Number of doses needed

Solution

Amount of Benadryl for 25 kg weight :

[tex]\tt 25~kg\times 5~\dfrac{mg}{kg}=125~mg[/tex]

Amount of Benadryl solution :

[tex]\tt \dfrac{125~mg}{12.5~mg/5~ml}=125~mg\times \dfrac{5~ml}{12.5~mg}=50~ml[/tex]

Amount of doses :

[tex]\tt \dfrac{50~ml}{12.5~ml}=4~doses[/tex]

Answer:

Inflammatory

Explanation:

Answer:

125.59528999999982

Explanation:

Answer:

2. It is made and released by the liver and stored in the gallbladder

3. It breaks down fats into fatty acids, which can be taken into the body by the digestive tract. So it helps with digestion

4. Order would go: Mouth. Esophagus. Stomach. The small intestine. Colon (large intestine) Rectum.

5. The salivary glands, liver, gallbladder, and pancreas are not part of the digestive tract, but they have a role in digestive activities and are considered accessory organs.

Explanation:

Bile is produced by the liver and held in the gallbladder before being released into the small intestine to aid in fat digestion. Food travels from the mouth to the esophagus, stomach, small intestine, large intestine, rectum, and anus, respectively.

Bile is a greenish-yellow fluid that is stored in the gallbladder and released into the small intestine when needed.

Answers to the given questions are as follows:

2. The structure that produces bile is liver produces bile.

3. The purpose of bile is to help digest fats in the small intestine.

4. The order that food passes through your body is mouth, esophagus, stomach, small intestine, large intestine (colon), rectum, and anus.

5. The three accessory digestive organs are the pancreas, gallbladder, and salivary glands.

Therefore, above are the mentioned answers to the given questions.

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Answer:

This is all up to you

Explanation: This question is up to you because you may think both or just one.

Answer: Its D. motor

Explanation:

TRUST ME ITS RIGHT

A fuel cell is an electrochemical device that generates electricity through reactions. A represents the electrolyte of the cell. Thus, option c is correct.

An electrolyte is a solution capable of conducting electricity through them because of its charged particle nature. The dissolved salts and ions are the carriers of electricity.

Anode and cathode are the two plate terminal that is charged and attracts the oppositely charged particles dissolved in the solution to conduct the electricity. The motor converts the energy onto electricity.

Therefore, option c. labeled part A is an electrolyte.

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Answer:

A is a Comet, B is an asteroid

Explanation:

:X

The molecular geometry about N in the molecule CH3NHCH3 is  trigonal pyramidal. Therefore, option B is correct.

The three-dimensional arrangement of the atoms that make up a molecule is known as molecular geometry. It includes the molecule's general shape as well as bond lengths and bond angles.

A molecule is trigonal planar if it has three bonds and no lone pairs. A molecule is bent or angular if it has three bonds and one lone pair. Tetrahedral molecules have four bonds and no lone pairs. A molecule is trigonal pyramid if it has four bonds and one lone pair.

Three of the five nitrogen electrons in NH3 are involved in bonding with three hydrogen atoms, while the unbounded two electrons form the single unshared pair of electrons. Ammonia has a trigonal pyramidal shape due to this lone pair.

Thus, option B is correct.

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Answer:

A solid has a definite shape and volume.

A solid has a definite shape and volume.Solids in general have higher density.

A solid has a definite shape and volume.Solids in general have higher density.In solids, intermolecular forces are strong.

A solid has a definite shape and volume.Solids in general have higher density.In solids, intermolecular forces are strong.Solids have high melting points.

Answer:

Any 3 properties of solid are as follows

Explanation:

Answer:

homeostasis

Explanation:

source Wiki

In biology, homeostasis (or “health”) is the state of steady internal, physical, and chemical conditions maintained by living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). Other variables include the pH of extracellular fluid, the concentrations of sodium, potassium and calcium ions, as well as that of the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity. Each of these variables is controlled by one or more regulators or homeostatic mechanisms, which together maintain life.

Answer:

1) Helium (2 electrons)

2) Neon (10 electrons)

3) Argon (18 electrons)

4) Krypton (36 electrons)

Answer:

A. 3+

Explanation:

In the complex, the global charge is -1.

There are 2 molecules of H₂O but water is a neutral ligand that doesn't contribute any charge to the complex

In contrast, the C₂O₄ ligand has a charge of -2. As there are 2 C₂O₄, the charge is -4.

The -4 + The charge of Cr is equal to global charge of the complex ion = -1.

Thus, Cr has a charge of +3 and right answer is:

Answer:

B.

the process by which rocks are broken down into sediment