calculate the mass in g of agarose required to make 200 ml of a 1.2% agarose gel. record the answer to one decimal place

Answer:

M= ml - 45301 - 11.59M.

Explanation:

Answer

a. CO₂: the standard deviation of the set is 6.76

To convert grams (g) of a substance to moles (mol), you need to divide the mass by the molar mass of the substance.

The molar mass of Be(NO2)2 can be calculated by adding the molar masses of its constituent atoms, which are:

The molar mass of Be: 9.01 g/mol

The molar mass of N: 14.01 g/mol

The molar mass of O: 16.00 g/mol (there are two oxygen atoms in the nitrite ion, NO2-)

So the molar mass of Be(NO2)2 is:

9.01 g/mol (Be) + 2(14.01 g/mol (N) + 2(16.00 g/mol (O)) = 9.01 g/mol + 28.02 g/mol + 32.00 g/mol = 69.03 g/mol

Now we can use this molar mass to convert 11.9 g of Be(NO2)2 to moles:

moles = mass/molar mass

moles = 11.9 g / 69.03 g/mol

moles ≈ 0.1727 mol

Therefore, 11.9 g of Be(NO2)2 is equivalent to approximately 0.1727 moles.

Answer:

If n = 4, then the possible values of 1 and m depend on the equation or expression being used. Without more information, it is impossible to determine what the possible values of 1 and m might be. Can you please provide more context or information about the problem you are trying to solve?

Answer:

The correct answer is:

(1) decreases 1 pH unit

Answer: Earth and the sun

Explanation:

Because the earth  is tilt toward the sun the planet rotates about axis but it isn't visible,also at different times of the year the northern ans southern axis are close to the sun.

hope this helps  

Answer:

the pig's average speed is 7 m/s

The average speed of a moving body is the ratio of the distance travelled to the time of travel. Here, the speed of the pig running 46 meters in 6 seconds is 7.6 m/s.

The speed of an object is a physical quantity that measures the distance travelled by the object per unit time. Hence, it is the ratio of distance travelled to the  time taken for the travel. The rate of speed is called velocity. Bot are having the standard unit of m/s.

Given that,

distance covered by the pig = 46 meters

time taken = 6 seconds

speed  = distance/time.

Average speed of the pig = 46 meters/ 6 seconds = 7.6 m/s.

Therefore, if the small pig runs 46 meters in 6 seconds, it is having an average speed of 7.6 m/s.

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Answer: 0.0827

Hope This Will Help You And This Should Be The Correct One.

Explanation:

Hypothesis is answer.

Have a great day

The moles of disodium EDTA used be 0.001155 moles.

Ethylenediaminetetraacetic acid has a salt known as disodium EDTA (commonly known as EDTA). It serves largely as a chelating agent in cosmetic formulations, preventing chemicals from forming bonds with trace elements (mostly minerals) that may be present in water or other components.

In the structure of EDTA, there are typically four negatively charged oxygen atoms. These two oxygen atoms are joined by two sodium cations to form disodium EDTA. An unwanted byproduct of EDTA production is disodium EDTA. Ethylenediamine, formaldehyde, and sodium cyanide are components in the manufacture of EDTA.

The following formula is used to determine how many moles of disodium EDTA are needed.

Moles = molarity × volume in liters

Molarity = 0.050m

Volume in liters = 23.1/1000 = 0.0231 L

Moles =  0.0231 x 0.050 = 0.001155 moles of disodium EDTA

Therefore, the moles of disodium EDTA used be 0.001155 moles.

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Answer:

0.5M

Explanation:

Molarity = Mols/ Liters

so 2/4

0.5 M

Answer:

Cu(s) + 4HNO₃(aq) -> Cu(NO₃)₂(aq) + 2NO₂(g) + 2H₂O(l)

Answer:i believe 9-?

Explanation:

boron-10

boron-11

carbon-12

carbon-13

oxygen-16

oxygen-17

oxygen-18

chlorine-35

chlorine-37

Each sentence about the bioavailability of minerals in foods should be completed with either increases or decreases as follows:

Nutrients can be defined as the chemical compounds (substances) or minerals that are present in food, and they are needed by the body of a living organism for healthy growth, reproduction, development, proper functioning, and reproduction.

In Science, there are five (5) main classes of nutrients and these include the following:

In conclusion, phytic acid, oxalic acid, and refinement of grains are factors that decrease the bioavailability of minerals in foods while Vitamin C and Vitamin D increases the bioavailability of minerals in foods.

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hindi ko po getssssss

yan pasyensya na po

The final value for the enthalpy change of the formation of CO2 and 2H2O from their elements (C, H2, and O2) would be -1410 kJ per mole of CO2 and 2 moles of H2O formed.

The enthalpy change (ΔH) for the reaction CO2 + 2H2O → H2CO3 can be calculated by multiplying the stoichiometric coefficients of the balanced equation by the enthalpy values of the corresponding compounds involved in the reaction.

In the given reaction, the enthalpy change is -1410 kJ. However, it's important to note that this enthalpy change corresponds to a specific reaction and may not directly apply to the formation of CO2 and 2H2O from another reaction or process.

If we assume that the reaction is the formation of one mole of CO2 and two moles of H2O, we can say that the enthalpy change for this specific formation reaction is -1410 kJ.

Therefore, the final value for the enthalpy change of the formation of CO2 and 2H2O from their elements (C, H2, and O2) would be -1410 kJ per mole of CO2 and 2 moles of H2O formed.

It's worth mentioning that the enthalpy change can vary depending on the specific conditions (temperature, pressure, etc.) and the reactants involved in the reaction. Therefore, it's crucial to specify the conditions and reaction context when referring to enthalpy values.

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Answer:

The answer is A

Reflect visible light

There will be 0.39 moles

Take a look at the He gas in the tank:

P = 2.80 atm, or pressure

Volume = 5.00 liters.

T = (273 + 155) is the temperature. K = 428 K

R = 0.08206 L atm/L of gas (mol K)

Charle's law, Boyle's law, and Gay-Lussac law are the three gas laws that make up the combined gas law, commonly referred to as a general gas equation. For a certain amount of gas, the law illustrates the relationship between temperature, volume, and pressure.

Gas law PV = nRT

So, n = PV/. (RT)

He gasses number = 2.80 x 5.00 / (0.08206 x 428) mol equals 0.39 mol.

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Image 1

1) There is more proton repulsion in Uranium than in Barium

2) Barium experiences a stronger force holding the nucleons together

3) The repulsion of the neutrons in Uranium makes the nuclide unstable

4) The higher the atomic number, the more likely that the nucleus is radioactive.

5) U-238 has 146 neutrons

6) U - 235 has 143 neutrons

Image 2;

1) You can minimize background radiation by limiting your outdoor exposure.

2) Cosmic radiation is the most difficult to avoid.

The natural radiation that is constantly present in the environment is known as background radiation.

It includes internal radiation found in all living things as well as cosmic radiation, which originates from the sun and stars and terrestrial radiation, which originates from the Earth.

We know that the repulsion of the protons in the Uranium nucleus is more than that of the barium nucleus because there are more neutrons in the Uranium nucleus. It is this repulsion that makes Uranium unstable.

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A) Ethanol in water: Distillation.

B) Boiling the mixture of chloride crystals with water: Evaporation.

C) Pure water from muddy water: Filtration.

D) Sodium chloride in water: Evaporation or Crystallization.

E) Sodium carbonate in water: Filtration or Evaporation.

F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol.

G) Mixture of acetic acid and alcohol: Distillation.

H) Serum from blood sample: Centrifugation.

I) Kerosene from water: Separatory funnel or Decantation.

J) Ammonium chloride in sand: Sublimation or Dissolving in water and Filtration.

A) Ethanol in water: Distillation can be used to separate ethanol from water based on their different boiling points.

B) Boiling the mixture of chloride crystals with water: By heating the mixture, the water will evaporate, leaving behind the chloride crystals.

C) Pure water from muddy water: Filtration can be used to separate the solid particles (mud) from the water.

D) Sodium chloride in water: Evaporation can be used to separate sodium chloride from water by heating the mixture until the water evaporates, leaving behind the salt.

E) Sodium carbonate in water: Filtration can be used to separate solid sodium carbonate from water, similar to muddy water.

F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol or acetone can be used to separate chlorophyll from leaves.

G) Mixture of acetic acid and alcohol: Distillation can be used to separate the mixture based on their different boiling points.

H) Serum from blood sample: Centrifugation can be used to separate the serum, which is the liquid part of blood, from the solid components like cells.

I) Kerosene from water: Separatory funnel or decantation can be used to separate the immiscible liquids by pouring off the top layer (kerosene) from the bottom layer (water).

J) Ammonium chloride in sand: Sublimation can be used to separate ammonium chloride by heating the mixture, causing the ammonium chloride to vaporize and then condense back into solid form in a cooler region, leaving the sand behind.

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The pH of the solution, which is set at 3, depends on the kinds and amounts of glycine present in the solution as well as the pka of the NH2 group, which ranges from 9 to 78. pH = equivalent = 9.78, thus

What is glycerine's advantage?

Glycerine, an amino acid, provides a wide range of incredible health benefits. Your body needs glycerine to make essential compounds including glutathione, creating, and collagen. This amino acid may also protect your liver from the negative effects of alcohol while improving your heart health and sleep.

who shouldn't consume glycerin?

A single amino acid should not be consumed in large amounts over a lengthy period of time. Avoid consuming isolated amino acids in large amounts without first talking to a doctor. Glycine supplements shouldn't be taken by women who are pregnant or breastfeeding.

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Answer:

A. CODIS

Explanation:

The Combined DNA Index System (CODIS), administered by the FBI, maintains DNA profiles obtained through federal, state, and local DNA sample collection programs, and makes this information available to law enforcement agencies across the country for law enforcement identification purposes.

Answer:

Explanation:

Pressure and volume are indirectly related.

Pressure and temperature are directly related.

so first ? is increase

2nd ? is decrease

Answer:

Explanation:SOHO is a three-axis stabilised spacecraft that constantly faces the Sun. Its design is based on a modular concept with two main elements: the payload module, housing the 12 instrument packages, and the service module, providing essentials such as thrusters, power and communications.

Answer: 177.23 g.

Explanation:

the volume of the aluminum bar is

1.7 cm x 3.0 cm x 12.9 cm

= 65.61 cm^3

2.7 g/cm^3 x 65.61 cm^3

177.23g

Answer:

\(M=0.0256M\)

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

\(PbSO_4(aq)+2KCl(aq)\rightarrow PbCl_2(s)+K_2SO_4(aq)\)

In such a way, since all the lead (II) is converted due to the excess of potassium chloride, the moles of lead (II) in the sample are computed from the mass of lead (II) sulfate:

\(n_{Pb^{2+}}=12.8gPbSO_4*\frac{1molPbSO_4}{303.3gPbSO_4} *\frac{1molPb^{2+}}{1molPbSO_4} \\\\n_{Pb^{2+}}=0.0422molPb^{2+}\)

Thus, since volume of the solution is 1.65 due to the fact that the addition of the reactants is not enough to significantly modify the reaction's volume, the resulting molar concentration of the lead (II) ions is:

\(M=\frac{n_{Pb^{2+}}}{V}=\frac{0.0422molPb^{2+}}{1.65L}\\ \\M=0.0256M\)

Regards.

Answer:

magnetite

Explanation:

proportion of iron in haematite = 3.5/5 x 100% = 70%

proportion of iron in magnetite = 7.2/10 x 100% = 72%

Answer:

fusion in the sun

Explanation:

I know this because I am currently talking this test and I know it cause I did it

Answer:Turning on a ceiling fan: electrical to mechanical

I took the test and Fusion in the sun: chemical to light and heat Lighting a match: sound energy into chemical energy were the wrong answers.