the solution in the large container was 60% alcohol. and the solution in the small container was only 30% alcohol. how much of the large container should be used to get 300 ml that is 42% alcohol?

Answer:

they break down sugars to provide energy for the cell

Explanation:

I'm not sure about my answer but I would have gone with that cause mitochondria are sites for respiratory reactions that yield energy to the cell

To make 150 mL of 0.5 M sucrose, you need to add 75 grams of sucrose.

This is calculated by multiplying the volume (150 mL) by the molarity (0.5) and then multiplying that by the molecular weight of sucrose (342.3 g/mol). The equation looks like this:

150 mL × 0.5 M × 342.3 g/mol = 75 g sucrose

This is calculated by multiplying the volume of sucrose (150 mL) by the concentration (0.5 M) to get the total moles of sucrose needed, which is then multiplied by the molecular weight of sucrose (342 g/mol) to get the total grams of sucrose needed.

Therefore, 75 grams of sucrose is required to make 150 mL of 0.5 M sucrose.

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5.58 × 10²⁴ molecules O₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

9.27 mol O₂ (Oxygen)

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules. We are given 3 sig figs.

5.58239 × 10²⁴ molecules O₂ ≈ 5.58 × 10²⁴ molecules O₂

Corrosive chemical typically involve either acid-base reactions or redox reactions, and sometimes both. Therefore the correct option is option D.

A corrosive chemical can interact with a substance in an acid-base reaction by either giving or receiving protons, which can harm the substance.

For instance, powerful acids that react with the metal to produce hydrogen gas, such as hydrochloric acid, can corrode metals. Redox reactions include the transfer of electrons from or to a substance by corrosive chemicals, which causes the substance to degrade.

For instance, iron rusts because iron oxidises, which occurs when iron loses electrons to oxygen in the presence of water. Some caustic substances can also conduct redox as well as acid-base reactions. For instance, sulfuric acid can corrode metals by oxidising the metal and causing an acid-base interaction. Therefore the correct option is option D.

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Answer:

95.965 grams

Explanation:

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

Then you can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of NH₃, then 3.4×10²⁴ molecules are contained in how many moles of NH₃?

amount of moles of NH₃= (3.4×10²⁴ atoms × 1 mole)÷ 6.023×10²³ atoms

amount of moles of NH₃= 5.645 moles

Being the molar mass of NH₃, that is, the amount of mass that a substance contains in one mole, 17 , then the amount of mass that 5.645 moles of the compound contain can be calculated as:

5.645 moles× 17=  95.965 grams

Finally, 95.965 grams of NH₃ are in 3.4×10²⁴ molecules of NH₃.

Answer:

Explanation:

The balanced equation says that we'll get 1 mole of H2 for every 1 mole of Mg.  50 grams of H is 50g/2 g/mole = 25 moles of H2.  That means we'll need 25 moles of Mg.  Convert that into grams:  (25 moles Mg)*(24.3 g/mole) = 607 grams Mg.  

At STP, all gases occupy 22.4 liters/miole.  That means 25 moles of H2 would occupy (25 moles)*(22.4 liters/mole) = 560 liters.

Answer:

AgNO3 - Silver nitrate

CaCl2 - Calcium chloride

Al2S3, aluminum sulfide

Explanation:

THESE ARE NOT LINKS TO OTHER WEBSITES!!!! THESE ARE METALLIC COMPOUND FORMULAS!!!!

(My other answer was deleted because they thought i was posting websites but i was posting formulas for your question)

Answer:

9.370 x 10 to the 23 molecules

Explanation:

91.72/1 x 1 mole Co/58.933g x 6.02 x 10 to the 23/1 mole Co

Answer:

Explanation:

Mass 1 mole of CO

C = 12

O = 16

m = 28

Mols of 91.72 grams

m = given Mass / Molar Mass

m = 91.72 / 28

m = 3.28 mols

Molecules

1 mol of anything is 6.02 * 10^23 molecules (in this case)

3.28 mol of CO = x

1/3.28 = 6.02*10^23/x      Cross multiply

x = 3.28 * 6.02 * 10^23

x = 1.97 * 10^24

Answer:

As for my own understanding. I think the answer I B= because it has three valence electron

Answer: To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above. Use uppercase for the first character in the element and lowercase for the second character.

Explanation:

Among the given options, the compound most likely to have the highest viscosity at 25°C is (C) HOCH₂CH₂OH (ethylene glycol).

Ethylene glycol has stronger intermolecular forces compared to the other compounds due to its ability to form hydrogen bonds with neighboring molecules. These hydrogen bonds increase the resistance to flow and contribute to a higher viscosity.

In contrast, C₆H₁₄ (hexane) and C₇H₈ (toluene) are nonpolar compounds, which have weaker intermolecular forces and lower viscosities. C₃H₇OH (isopropyl alcohol) is polar and can form hydrogen bonds, but it has a shorter carbon chain compared to ethylene glycol, resulting in relatively weaker intermolecular forces and lower viscosity.

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The chemical reaction is a rearrangement of atoms: In the previous postulate, Dalton proposed that chemical processes neither destroy nor generate atoms. They just rearranged the atoms. Taking our salt example again, whenever sodium combines with chlorine to form salt, both the sodium and chlorine atoms remain.

What is a chemical reaction?

A chemical reaction is a process that results in the chemical change of one set of chemical components into another.  Chemical reactions are changes that simply affect the locations of electrons in the formation and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and may typically be represented using a chemical equation. Nuclear chemistry is a branch of chemistry that studies the chemical interactions of unstable and radioactive materials in which both electronic and nuclear changes can occur.

According to the Daltons atomic theory the chemical reaction will be resulting in the rearranging of the atoms of the compound.

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Explanation:

All the elements in one group have the same number of valence electrons. The valence electrons are those on the energy level the most distant from the nucleus. These valence electrons are those involved in bonding with other atoms to form compounds.

In the periodic table elements in the same group posses similar physical and chemical property and this is due to the similarity in the number of valence electrons found in their  valence shells.

While in the periodic table as we move down a group the atomic number of the elements will continue to increase because elements in the same group are located in different periods as well.

Hence we can conclude that the difference in the elements located in a group is that they have different atomic numbers while the similarities is that the posses the same number of valence electrons.

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Answer:

1.) The possible genotypes are FF and Ff

The phenotype is full pod shape

2.) The possible genotypes are GG, Gg, and gg

The photypes are Green (for those whose genotype is GG and Gg) and yellow ( For those whose genotype is gg)

Explanation:

My hand writting isn't the best so I'll also type it.

1.) There are only 2 possible genotypes the offspring can have which are FF or Ff.

Because the dominant allele is F all the offspring from this cross will have a full pod shape phenotype.

2.) There are only 3 possible genotypes the offspring can have which are GG, Gg, and gg.

The majority of the offspring will have a green phenotype while the remainder will be yellow. G is the dominant allele so any offspring with the genotype GG or Gg will be green. While g is a recessive allele and only offspring who has a genotype of gg will be yellow.

*On my paper for question 2 for the phenotype explination I accidently wrote genotype instead of phenotype.

*Another note is that an offspring must have both recessive alleles in order to show the recessive traits. That is why gg is yellow and Gg is green.

Hope I helped

Explanation:

Density = mass/volume

.: volume = mass/density

Volume = 77/3.5

Volume = 22cm³

Answer:

Polar molecules have a non-zero net dipole moment. Both CO2 and H2O have two polar bonds. However the dipoles in the linear CO2 molecule cancel each other out, meaning that the CO2 molecule is non-polar. The polar bonds in the bent H2O molecule result in a net dipole moment, so H2O is polar.

Explanation:

Answer:

Explanation:

Rocco is making bonds when he prepares these compounds. Two pieces of evidence for this are:

The chemical reactions are written with an arrow pointing to the right, indicating that the reactants are being converted into products.

The reactions release heat, which is a sign of a chemical reaction occurring and bonds forming.

The bond type in these compounds is an ionic bond. Two pieces of evidence for this are:

The reactants in the chemical reactions consist of a metal (Li or Mg) and a nonmetal (Cl or Br), which are the types of elements that typically form ionic bonds.

The products of the reactions are compounds with a metal and a nonmetal, which also suggests an ionic bond.

The oxidation numbers of lithium and magnesium are +1 and +2 respectively. The oxidation number of chlorine and bromine are -1. Since the oxidation number of lithium is lower than the oxidation number of magnesium, lithium will lose an electron more easily than magnesium. So the reaction of lithium and chlorine is more favorable than magnesium and bromine. That's why Rocco is only getting half as much magnesium compound than lithium compound when preparing these chemicals. To increase his yield, Rocco can try to use a higher amount of magnesium or a lower amount of bromine in the reaction.

Water 3.0 deals mainly with sewage treatment. The primary aim of this project is to reduce the harmful impacts of chemical pollutants from industrial and agricultural activities on natural water resources.

Currently, used wastewater treatment technologies can break down some of the chemicals in wastewater but not all of them. Chemicals that are not broken down are referred to as persistent organic pollutants. These chemicals persist in the environment for long periods, and they can cause severe damage to aquatic life and human health.
Currently, the primary challenge facing water treatment technologies is the removal of persistent organic pollutants such as pesticides, pharmaceuticals, and endocrine-disrupting chemicals from wastewater.

These pollutants are generally water-soluble and resist microbial degradation, making them hard to remove from wastewater using current water treatment technologies. For example, conventional activated sludge treatment used in wastewater treatment plants does not remove some persistent organic pollutants from wastewater.
Failure to remove these pollutants from wastewater can have significant environmental and health impacts.

For example, pharmaceutical chemicals can cause antibiotic resistance, while endocrine-disrupting chemicals can cause birth defects, cancer, and other health problems.

Therefore, there is a need to improve wastewater treatment technologies to remove persistent organic pollutants from wastewater.
In conclusion, wastewater treatment technologies can break down some chemicals but not all. Chemicals that are not broken down are persistent organic pollutants and pose a significant risk to the environment and human health. Therefore, it is important to develop wastewater treatment technologies that can remove these pollutants from wastewater.

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Answer:

6

Explanation:

2+2+2=6 :)

Answer:

6

Explanation:

vvvffhjh DC hcf vhcnbfhbc

Answer:

Cobalt

Explanation:

The number of protons in an atom is called the atomic number.

Atomic number of an element is used by chemists to determine the element. The periodic table for example is based on the atomic number of elements.

Since both given elements have a proton number of 27, they are both the same element.

We simply check the periodic table for the element whose atomic number corresponds to this.

  The element here is Cobalt.

What differs between the two of them is that they are different isotopes.

Directed movements toward or away from chemical or physical signals are known as taxis.

Taxis is a behavioral response exhibited by organisms to move in a particular direction in response to stimuli such as light, temperature, gravity, chemicals, or other external cues.

There are different types of taxis based on the nature of the stimuli and the direction of movement. For example:

Phototaxis: Movement in response to light. Organisms may exhibit positive phototaxis (moving towards light) or negative phototaxis (moving away from light).

Chemotaxis: Movement in response to chemical signals. It can involve positive chemotaxis (moving towards a chemical attractant) or negative chemotaxis (moving away from a chemical repellent).

Thermotaxis: Movement in response to temperature gradients. Organisms may move towards or away from specific temperature ranges based on their preferences.

Geotaxis: Movement in response to gravity. Organisms may exhibit positive geotaxis (moving towards gravity, like plant roots growing downwards) or negative geotaxis (moving away from gravity, like some microorganisms floating upwards in water).

Rheotaxis: Movement in response to fluid flow, such as swimming against or with the current.

These taxis responses allow organisms to navigate their environment, locate resources, avoid potential dangers, and optimize their survival and reproduction. Taxis behaviors are observed across various organisms ranging from bacteria and insects to higher animals, including humans.

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The measurement of the outcome in both groups after the experimental group has received treatment is called post-test or post-measurement. It is a way to assess whether the treatment had any effect on the outcome being measured.

By comparing the post-test results of the experimental group to those of the control group, researchers can determine whether the treatment had a significant effect. This is an important step in evaluating the effectiveness of an intervention or treatment in a scientific study.

Post-measurement refers to the measurement of the outcome or variable of interest after an experimental intervention or treatment has been administered to a group of participants. It is a way to evaluate the effectiveness of the treatment in producing the desired outcome. The post-measurement is typically compared to a pre-measurement or baseline measurement taken prior to the intervention or treatment, in order to assess any changes that have occurred as a result of the treatment

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The new volume of the sample of helium gas as its temperature and pressure increases to the given values is 1.40×10²mL.

Combined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

At standard remperature and pressure

To calculate the new volume of the helium gas, we subtsitute our given values into the expression above.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

V₂ = P₁V₁T₂ / P₂T₁

V₂ = ( 1.0atm × 0.32L × 425.0K ) / ( 3.50atm × 273.15K )

V₂ = 136LatmK / 956.025atmK

V₂ = 0.14L

V₂ = 1.40×10²mL

Therefore, the new volume of the sample of helium gas as its temperature and pressure increases to the given values is 1.40×10²mL.

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The melting points of an impure sample is a) The two melting points are the same but the impure sample has a broader range.

Impure materials generally tend to have a barely decrease melting factor than the natural substance, and a broader melting temperature range. Pure materials may be diagnosed through evaluating the melting factor located withinside the test with posted reference records of what the melting factor need to be. Impurities, even if found in small amounts, commonly decrease the melting factor and expand the melting factor range. A huge melting factor range (extra than 5°C) commonly shows that the substance is impure; a slim melting factor range (O. 5-2°C) commonly shows that the substance within reason natural.

Thus, option a is the correct choice.

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Answer:

A)

Explanation:

Unit Test Edg 2020

Bonds formed when two atoms or compounds respectively donate and receive electrons are named iconic bonds and readily dissociate in water.

Electrostatic attraction between ions with opposing charges in a chemical molecule creates an ionic bond, also known as an electrovalent bond. When the valence (outermost) electrons of one atom are permanently transferred to another atom, a bond of this kind is created. If an atom receives electrons, it becomes a negatively charged ion (cation), but if it loses them, it becomes a positively charged ion (cation) (anion).

Ionic or electrovalent compounds are produced via ionic bonding, and the compounds generated between nonmetals and alkali and alkaline-earth metals serve as the best examples of this type of compound. The electrostatic forces of attraction between opposite charges and repulsion between similar charges orient the ions in these types of ionic crystalline solids so that every positive ion is surrounded by negative ions.

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The volume of the weather balloon at 18,000 feet will be 2,567 L.

What is volume?

In physics and chemistry, volume refers to the amount of space that a substance or object occupies in three dimensions. It is typically measured in units such as liters (L) or cubic meters (m³), depending on the size and scale of the object being measured.

To solve this problem, we can use the combined gas law, which relates the pressure, temperature, and volume of a gas:

(P1V1)/T1 = (P2V2)/T2

where P1, V1, and T1 are the initial pressure, volume, and temperature (STP), and P2, V2, and T2 are the final pressure, volume, and temperature.

At STP, the temperature is 0°C or 273 K and the pressure is 1 atm. We can use these values to find the initial volume:

(P1V1)/T1 = (P2V2)/T2

(1 atm)(4,500 L)/(273 K) = (P2)(V2)/(228 K)

V2 = (P2)(4,500 L)(228 K)/(1 atm)(273 K)

Now we need to convert the temperature and pressure at 18,000 feet to Kelvin and atmospheres, respectively. To convert -45°C to Kelvin, we add 273 to get 228 K. To convert 0.485 atm to atmospheres, we divide by 1 atm to get:

P2 = 0.485 atm / 1 atm = 0.485

Now we can substitute these values into the equation to find the final volume:

V2 = (0.485)(4,500 L)(228 K)/(1 atm)(273 K)

V2 = 2,567 L

Therefore, the volume of the weather balloon at 18,000 feet will be 2,567 L.

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