You will use a filter funnel in this experiment to .

Answer:

chalk bubbles with vinegar

Answer: B and D

Explanation:

Just did the test and these make the most sense

A chloroplast converts energy from sunlight into organic matter.

Mitochondria change energy stored in organic compounds into a

usable form. the two statements are ways in which cells get nutrients.

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Answer:

1.23345*10^11

5.768*10^(-5)

3.456*10^(-2)

2.28*10^9

8.0970*10^4

Explanation:

You just need to count the number of zeros and move the values backward and forward to get the scientific notation.

Answer:

The compound OH CH.CH.CHCH. CH,CH,CH is named 3-heptanol because it has a chain of seven carbon atoms with an OH group attached to the third carbon atom.

The compound OH CH.CH.CHCH. CH,CH,CH is named 3-heptanol.

To understand why it is named 3-heptanol, let's break down the name step by step:

1. The OH group at the beginning of the compound indicates that it is an alcohol, specifically a hydroxyl group (-OH) attached to a carbon chain.

2. The CH.CH.CHCH part of the compound indicates a chain of four carbon atoms. The numbers in front of the CH groups represent the positions of these carbon atoms in the chain.

3. Since there is an OH group attached to the third carbon atom in the chain, the compound is named 3-heptanol. The "hept" in the name refers to the seven carbon atoms in the chain, and the "ol" at the end indicates that it is an alcohol.

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Answer:

The common application of indicators is the detection of end points of titrations. The colour of an indicator alters when the acidity or the oxidizing strength of the solution, or the concentration of a certain chemical species, reaches a critical range of values.

In chemistry, the density of many substances is often compared to that of water. It has a density of 1 g/cm3, which makes it easy to remember and a good point of reference for other substances.

For example, if a substance has a density of 0.7 g/cm3, you can immediately tell that it is less dense than water and will therefore float in it.

This property of water also makes it an ideal medium for many chemical reactions, as most substances will easily dissolve in it and react with each other without the need to be heated or mixed in a special environment. This makes it an essential component of many laboratory experiments, as it can be used to create solutions quickly and safely.

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One mole of each element contains Avogadro's number of atoms, which is 6.022 x 10^23 atoms. Therefore, all three substances have the same number of atoms, which is 6.022 x 10^23 atoms.

Answer:

CaCI2 + H2O = Ca(OH)2 + HCI

Answer:

A. Solids can only change shape if forced to make a change

Explanation:

A solid substance is one of the states of matter.

Matter is anything that has weight and occupies a definite space.

There are three states of matter commonly known: solids, liquids and gases.

Answer:

Electromagnetic waves

Explanation:

The description given is that of an electromagnetic wave.

Electromagnetic waves are propagated by the vibration of electrical and magnetic fields in a perpendicular direction to one another.

Answer:22.37 mph

Explanation:

100 meters = 0.062137 miles

Assume constant speed over the distance.

0.062137 miles in 10 sec

0.372822 miles in 60 sec = 1 minute

22.36932 miles in 60 minutes

22.37 mph rounded to 2 decimals

Answer:

B

Explanation:

Hypoesthesia reduces physical sensation, especially that of skin.

To solve this we must be knowing each and every concept related to hypesthesia. Therefore, the correct option is option B among all the given options.

Hypoesthesia is caused mostly by nerve injury and blood vessel blockages, which cause ischemia damage to tissues fed by the stopped blood vessels. This damage can be detected using several imaging investigations.

The most common causes of hypoesthesia are nerve blood and injury channel blockages, which induce ischemic damage to tissues nourished by the blocked blood arteries. Several imaging examinations can be used to discover this injury. Hypoesthesia diminishes physical experience, particularly cutaneous sensation.

Therefore, the correct option is option B.

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The empirical formula for a aluminum compound containing oxygen (AlxOy), if 4.78g of Al reacts is Al3O2.

According to this question, 4.78g of Al reacts with oxygen to form a total mass of 6.67g. This means that the mass of oxygen that reacted is 6.67 - 4.78 = 1.89g

First, we convert each mass to moles

Next, we divide each value by the smallest

Multiply each value by 2

Al = 2.8 = 3

O = 2

Therefore, the empirical formula for a aluminum compound containing oxygen (AlxOy), if 4.78g of Al reacts is Al3O2.

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Answer:

966.4mL

Explanation:

Using the combined gas equation as follows:

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure

P2 = final pressure

V1 = initial volume

V2 = final volume

T1 = initial temperature (K)

T2 = final temperature (K)

According to this question, the following information were provided:

P1 = 998mmHg

P2 (STP) = 760mmHg

V1 = 806mL

V2 = ?

T1 = 26°C = 26 + 273 = 299K

T2 (STP) = 273K

P1V1/T1 = P2V2/T2

998 × 806/299 = 760 × V2/273

804388/299 = 760V2/273

2690.26 = 760V2/273

760V2 = 2690.26 × 273

760V2 = 734440.98

V2 = 734440.98 ÷ 760

V2 = 966.4mL

2 liters of 72 octane gasoline should be mixed with (12 - 2) = 10 liters of 84 octane gasoline to obtain 12 liters of 82 octane gasoline.

Let's assume x liters of 72 octane gasoline are mixed with (12 - x) liters of 84 octane gasoline to obtain 12 liters of 82 octane gasoline.

To find the solution, we can set up an equation based on the octane content: (72x + 84(12 - x)) / 12 = 82

Now, let's solve for x:

72x + 84(12 - x) = 82 * 12

72x + 1008 - 84x = 984

-12x = 984 - 1008

-12x = -24

x = (-24) / (-12)

x = 2

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Answer

find out the number of moles and use the molar ratio (numbers in front of formulas (in this case they are all 1) to determine how many moles of each product you are going to get theoretically

n=m/M is the equation to use to get moles here

30.8 gm/32.04 g/mol=0.9612 moles of the methanol and also of the formaldehyde so

0.9612 moles of the formaldehyde x molar mass (M) 30.73 g/mol= 29.54 gm which is the theoretical yield you already have the actual yield of 24.7 gm

then divide the actual by the theoretical to get the % yield which is 83.6%

Explanation:

The correct answer is d. an absorption at 3410 cm-1.

Infrared (IR) spectroscopy can be used to identify functional groups in organic molecules. The OH functional group in alcohols exhibits a characteristic absorption band around 3300-3600 cm-1. This absorption is due to the stretching vibration of the O-H bond.

In the isomer CH3CH2OH (ethanol), there is an -OH group present which will give rise to a strong absorption at around 3410 cm-1. In contrast, in CH3OCH3 (dimethyl ether), there is no -OH group, and therefore no absorption at this frequency.

Absorption at 3070 cm-1 (option a) is associated with the C-H stretch of an aromatic ring or the C-H stretch of an alkyne, and is not useful for distinguishing between these two isomers.

Absorption at 1100 cm-1 (option b) is associated with the C-O stretch of an ether, which is present in CH3OCH3, but also in CH3CH2OH, making it non-specific.

Absorption at 1500 cm-1 (option c) is associated with the C=C stretch of an alkene or the N-H bend of an amine, and is not useful for distinguishing between these two isomers.

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Answer:

The energy of a ruby laser that produces red light with a wavelength of 5.00 × 10^-7 m is 3.98 × 10^-19 J.

Explanation:

The energy of a photon is given by the formula E = hf where h is Planck’s constant and f is the frequency of the photon. The frequency of the photon can be calculated using the formula f = c/λ where c is the speed of light and λ is the wavelength of the photon.

Substituting the given values, we get:

f = c/λ = 3.00 × 10^8 m/s / 5.00 × 10^-7 m = 6.00 × 10^14 Hz

E = hf = (6.626 × 10^-34 J s) × (6.00 × 10^14 Hz) = 3.98 × 10^-19 J

Therefore, the energy of a ruby laser that produces red light with a wavelength of 5.00 × 10^-7 m is 3.98 × 10^-19 J.

Hello again!! :)

Answer:

dic

Explanation:

The purpose of using cobalt glass was to filter out yellow light emitted by sodium, allowing the observer to see the violet flame color of potassium.

When a sample containing both sodium and potassium is heated in a flame, they emit different colors of light. However, both elements emit some yellow light, which can make it difficult to distinguish between them. Cobalt glass filters out the yellow light, allowing the observer to see the distinct violet color of potassium flame. This is because the cobalt glass absorbs the yellow light and transmits the rest of the visible spectrum. Using cobalt glass is a common technique in flame tests to improve the accuracy of identifying the elements present in a sample.

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The force in a gas sample is composed of the sum of all collisions between the gas molecules, each other, and the container.

This is because the pressure of a gas is determined by the sum of all the collisions between the molecules, each other, and the walls of the container. These collisions impart momentum and energy to the gas, resulting in pressure.

What is Force?

Force is a push or pull exerted on an object that causes it to accelerate, move, stop, or change its shape. Force is measured using the unit of measurement called the newton (N).

What is Pressure?

Pressure is the amount of force per unit area. It is measured in the unit of measurement called the Pascal (Pa). Pressure is a measure of the amount of force that is applied over a given area. It is the result of the sum of all the collisions between the molecules, each other, and the walls of the container.

The force on a gas is the sum of all collisions of the molecules, each other, and the walls of the container. This force causes the pressure of the gas to increase or decrease, depending on the number of collisions and the magnitude of the force. The pressure of the gas is determined by the sum of all these collisions, and the force is what causes the gas to move and change shape.

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Answer:

It has less carbon dioxide than when it entered the gills, it has more oxygen than when it entered the gills

Explanation:

there is none i just found the answer =_=

Blood is different after it is pumped through gills as it has less carbon dioxide and more oxygen when it enters the gills through the process of diffusion.

Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.

There are 2 main types of diffusion:

1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.

2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.

There are 2 types of facilitated diffusion one is osmosis and dialysis.

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Answer:

The water can become acidified than normal because all the pollution such as when carbon dioxide can dissolve in sea waters causing the water be polluted because of the bad air.

Explanation:

1.52 tanks of gas will be used to drive 1600 km.

A certain fuel-efficient hybrid car gets gasoline mileage of 55.0 mpg (miles per gallon).

A gallon is a unit of volume in both the US customary and imperial systems of measurement. The US gallon is defined as 231 cubic inches (3.785 liters).

1 mpg = 0.425143707 km/l; to convert miles per gallon to kilometers per liter .

mileage = 23.38 km/l

volume = 1600 km ÷ 23.38 km/l

volume = 68.43 liters; the amount of gasoline needed the trip

tanks = 68.43 l ÷ 45 l

tanks = 1.52

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Diatoms are single-celled algae that have a silica (silicate) shell called a frustule.

Diatoms are photosynthetic organisms and are known for their intricate and diverse shapes. Diatoms are commonly found in freshwater and marine environments and play a significant role in the global carbon cycle.

Micrite is a fine-grained carbonate sedimentary rock composed of tiny carbonate particles. It forms through the precipitation and accumulation of carbonate minerals, such as calcite or aragonite, in marine environments. In the case of chalk, which is primarily composed of microscopic fragments of calcium carbonate from marine organisms, recrystallization can occur at the ocean bottom under specific conditions, leading to the formation of micrites.

Therefore, it's important to note that chert, marble, and quartzite are not the typical products of recrystallization of chalk at the ocean bottom.

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The advantage to performing the reaction in methyl ethyl ketone - a solvent with a high boiling point is to carry the reaction in the forward direction by refluxing the set.

Boiling point is defined as the bulk phenomenon. It is the temperature at which the pressure of atmosphere is equal to the pressure of the vapour or vapour pressure.

Since, high boiling point solvent are used during the procedure to reflux the set which help in carrying out the reaction in the forward direction. If we had used low boiling point solvent instead of high all of the solvent evaporated and refluxing of the mixture of reaction to get product for maximum production could not have been possible.

Thus, we concluded that the advantage to performing the reaction in methyl ethyl ketone - a solvent with a high boiling point is to carry the reaction in the forward direction by refluxing the set.

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Answer: (P2/P1)=(T2/T1)

(P2/1200.0kPa)=(387/283)

P2=(387K/283K) * (1200kPa)

P2= 1641kPa

Explanation:

An Oxygen Tank has a pressure of 1200 Kpa at 283K and when temp. is increased to 378 K then pressure will be 1,602.82 kpa.

From the ideal gas equation it is clear that pressure of gas is directly proportional to the temperature, and for this question required equation will be:

P₁/T₁ = P₂/T₂, where

P₁ = initial pressure of oxygen tank = 1200 kpa

T₁ = initial temperature of oxygen tank = 283 K

P₂ = final pressure of oxygen tank = ?

T₂ = final temperature of oxygen tank = 378 K

On putting values, we get

P₂ = (1200)(378) / (283) = 1,602.82 kpa

Hence resultant pressure of the oxygen tank is  1,602.82 kpa.

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