Question 2 of 11
Which of these are part of a scientific way of gathering information?
A. Fairy tales
B. Religious beliefs
C. Investigations
D. Opinions
SUBMIT

Answer:

180.155 g

Explanation:

i) A is to B: hypoosmotic (Solution A has a lower osmolarity compared to Solution B). ii) B is to A: hyperosmotic (Solution B has a higher osmolarity compared to Solution A)

iii) A is to C: isosmotic (Solution A and Solution C have the same osmolarity)

iv) C is to A: isosmotic (Solution C and Solution A have the same osmolarity)

When you drink water, the osmolarity of body fluids will decrease. This is because water is a hypotonic solution compared to body fluids.

Hypotonic refers to a solution that has a lower solute concentration compared to another solution or a reference solution. In a hypotonic solution, there is a higher concentration of water molecules relative to solute particles.

By drinking water, you are diluting the solute concentration in the body, leading to a decrease in osmolarity. Therefore, the values related to osmolarity, such as the concentration of solutes in the body fluids, would decrease.

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Answer:

Volume in L = 0.028 L

Explanation:

Given data:

Mass of copper phosphate = 27.6 g

Molarity solution = 6.03 M

Volume of solution = ?

Solution:

First of all we will calculate the number of moles of copper phosphate.

Number of moles = mass/molar mass

Number of moles = 27.6 g/ 159.61 g/mol

Number of moles = 0.17 mol

Volume of solution:

Molarity = number of moles / volume in L

By putting values,

6.03 M = 0.17 mol / volume in L

Volume in L = 0.17 mol / 6.03 M

Volume in L = 0.028 L

Answer:

The enthalpy is increased by the increased heat of the reaction.

Explanation:

In this reaction, as the transition from solid to liquid state, enthalpy increases, that is, the heat applied to change its state is greater and this increases, reaching a mayor disorder.

If the reaction increases its heat, and a liquid state passes, the enthalpy increases, therefore the disorder also and the entropy will also be increased.

Answer:

Lithium and beryllium.

Explanation:

The flask at the endpoint will contain (besides the indicator phenolphthalein) the principal component is dissolved sodium sulfate and water.

The amount of sulfuric acid needed to neutralize the sodium hydroxide is 0.010 moles.

The endpoint, both the reactants will be exactly equal to neutralize each other. The flask will contain \(Na_{2} So_{4}\) and water. \(Na_{2} So_{4}\) is highly soluble in water and so it will exist as a solution in water. No precipitate will be formed.

The endpoint of the titration of a strong base and strong acid is where the base is just neutralized by the acid. At the endpoint, neither the base nor the acid is in excess.

The reaction of NaOH with \(H_{2} So_{4}\) is

2NaOH(aq) + \(H_{2} So_{4}\) (aq) -------> \(Na_{2} So_{4}\) (aq) + 2\(H_{2} 0\)(l)

A solution is any combination of one or more solutes that have dissolved in a solvent. Remember that the solvent has the maximum concentration of any chemical. There are many different types of solutions. For instance, a solute might be a gas, a liquid, or a solid.

A solution is made up of both a solute and a solvent. The solvent, which dissolves the solute, makes up the majority of the solution. There are many useful uses for liquids' capacity to dissolve other liquids or solids. Chemists can separate and purify materials and perform chemical analysis by taking advantage of variations in solubility.

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Answer:

Al₂O₃ + 6 NaOH -----> 2 Al(OH)₃ + 3 Na₂O

Explanation:

This is a double-displacement reaction. In these reactions, the cation of one compound is swapped with the cation of another.

It is important that the new products have an overall charge of 0. To do this, some compounds must have more than 1 atom of each ion.

1.) Al(OH)₃

-----> Al³⁺ and OH⁻

-----> +3 + (-1) + (-1) + (-1) = 0

2.) Na₂O

-----> Na⁺ and O²⁻

-----> +1 + 1 + (-2) = 0

An equation is balanced when there is an equal amount of each element on both sides of the reaction. If these values are unequal, you can add coefficients to modify the amounts of particular compounds.

The unbalanced equation:

Al₂O₃ + NaOH -----> Al(OH)₃ + Na₂O

Reactants: 2 aluminum, 4 oxygen, 1 sodium, 1 hydrogen

Products: 1 aluminum, 4 oxygen, 2 sodium, 3 hydrogen

The balanced equation:

Al₂O₃ + 6 NaOH -----> 2 Al(OH)₃ + 3 Na₂O

Reactants: 2 aluminum, 9 oxygen, 6 sodium, 6 hydrogen

Products: 2 aluminum, 9 oxygen, 6 sodium, 6 hydrogen

The given statement "A hot plate is the only heat source available in the lab room to heat the hydrate in a crucible at least 2 times for 10-15 minutes at medium-high setting" is true because the water in hydrate can be removed by heating.

The crucible is the type of the laboratory glassware that is designed to melt or to burn the solid chemicals over the burner. Crucible is made from the heat resistant ceramic or the metal. The hot plates are the laboratory tools that is used for the  uniformly heat the samples. The hot plates are available with Varity of the  number of the different heating top styles.

Thus, the hot plate is the heating tool to heat the hydrate in the crucible.

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Answer:

51

Explanation:

Range= the difference between highest number and lowest number in a data set. For this, range =62-11 = 51

hope this helps

Answer:

C) Aging

Explanation:

You can't stop that or change the rate that you age at. its inevetable :D

Sure! Heptane is a hydrocarbon with seven carbon atoms. The nine structural isomers of heptane are:

1. Straight-chain heptane: CH3-CH2-CH2-CH2-CH2-CH2-CH3
2. 2-Methylhexane: CH3-CH(CH3)-CH2-CH2-CH2-CH3
3. 3-Methylhexane: CH3-CH2-CH(CH3)-CH2-CH2-CH
4. 2,2-Dimethylpentane: CH3-C(CH3)2-CH2-CH2-CH3
5. 2,3-Dimethylpentane: CH3-CH(CH3)-C(CH3)2-CH2-CH3
6. 2,4-Dimethylpentane: CH3-CH(CH3)-CH2-C(CH3)2-CH3
7. 3,3-Dimethylpentane: CH3-CH2-C(CH3)2-CH2-CH3
8. 3-Ethylpentane: CH3-CH2-CH2-CH2-CH(CH3)-CH2-CH3
9. 2,2,3-Trimethylbutane: CH3-C(CH3)2-CH(CH3)-CH3

Each of these isomers has a different arrangement of atoms, which gives them unique structural formulas. I hope this helps! the names of the nine structural isomers of heptane, which are alkanes with the molecular formula C7H16. You can then look up their structures using these names: 1. Heptane (n-heptane) 2. 2-Methylhexane 3. 3-Methylhexane 4. 2,2-Dimethylpentane 5. 2,3-Dimethylpentane 6. 2,4-Dimethylpentane 7. 3,3-Dimethylpentane 8. 3-Ethylpentane 9. 2,2,3-Trimethylbutane These isomers differ in the arrangement of their carbon atoms, which is why they are called structural isomers.

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If we pull on an object hanging from a force meter it wouldn't give us an accurate reading of its weight.

Another way to describe force is as a push or a pull. Instruments called force meters are made to measure force precisely. The digital meter and the spring meter are the two primary types of force meters. Typically analog, spring meters have a hook on the end of the spring that you attach to the thing you want to measure. The force used to expand the spring mechanism is measured by spring force meters. Either a strain gauge or a load cell is used in digital meters. The load cell or strain gauge electrical signal is converted into a force value by the software and electronics of the force gauge, which is then shown on the instrument's digital screen.

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If you pull on an object hanging from a force meter, the reading you obtain would give you an accurate measurement of the force you are applying to the object, but not necessarily its weight.

Weight is the force exerted on an object due to gravity, and it is equal to the mass of the object multiplied by the acceleration due to gravity (typically 9.8 m/s² on Earth).

When you pull on the object, the force meter measures the tension force in the string or whatever is connecting the object to the force meter. This tension force includes the force you are applying as well as the weight of the object. Therefore, the reading on the force meter would be the sum of the force you exert and the weight of the object.

To accurately determine the weight of the object, you would need to ensure that the force meter is only measuring the tension force due to the weight of the object and not any additional forces you are applying. This can be achieved by making sure that the object is stationary and not accelerating.

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Answer:

Explanation:

Power house of the cell.

It carries the DNA strand from the ribosome

Answer:

mitochondrion: the part of a cell where cellular respiration happens  

Explanation:

Components of atoms are called subatomic particles and generally include the proton, electron, and neutron.

What are subatomic particles?

Proton:

Proton and neutron make the nucleus of an atom and hence are called nucleons.

Electron:

Electrons are subatomic particles that revolve around nucleus of an atom.

Neutron:

Neutrons are named for their neutral nature as unlike protons and electrons they dont carry any charge

Protons and electrons are subatomic particles which are equal in a neutral atom

What are ions?

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The mother liquor from the recrystallization of a dinitro compound is expected to contain other products, such as nitrites, nitrates, and aqueous solutions.

Explanation: In the mother liquor from the recrystallization of the dinitro compound, other products that are expected to be found are generally impurities or by-products that are not soluble in the recrystallization solvent, as well as a small amount of the product that did not crystallize.To remove the impurities that remain in the mother liquor, it is often essential to repeat the recrystallization procedure with a different solvent or a solvent mixture until the desired purity is achieved.In general, recrystallization is a technique that allows for the purification of a chemical substance by dissolving the impure substance in a solvent and then re-crystallizing it from a fresh solvent with appropriate cooling.A dinitro compound, as the name suggests, is a compound that contains two nitro groups. The recrystallization of such compounds often occurs as a result of their insolubility in some solvents at room temperature.

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Explanation:

it contains 6.02*1023atoms

Atom, the smallest unit of material which may be separated without releasing electrically charged. It is also the smallest unit of mass with the properties of a chemical element.

          \(\to \bold{ 1.75 \times 6.022\times 10^{23}}\\\\\to \bold{ 10.5385 \times 10^{23}}\\\\\)

Therefore, the answer is "\(10.5385 \times 10^{23}\)".

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Answer:

only god knows the answer

The Gibbs free energy is given by the change in enthalpy, temperature, and change in entropy. The standard change in Gibbs free energy for oxidation of iron is –1484.6 kJ.

Gibbs free energy is the energy present in a thermodynamic system that is used by the reactant to form a product. It is given as,

Δ G° = Δ H° -T ΔS°

The oxidation reaction of iron is given as,

4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)

Given,

ΔS° = –549.73 J∙K⁻¹

T = 298 K

Δ H° = –824.2 kJ∙mol⁻¹

Substituting values above the Gibbs free energy is calculated as:

Δ G° = Δ H° -T ΔS°

= –824.2 kJ∙mol⁻¹ -  298 K ( –549.73 J∙K⁻¹)

= -1484580.46 J

The units of joules are converted into kilojoules and the standard change in Gibbs free energy will be –1484.6 kJ.

Therefore, –1484.6 kJ is the Gibbs free energy.

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Answer: this might have something to do with the pancreas

Explanation:

the pancreas produces insulin if subject a produces more insulin than subject b the reaction to the glucose will be different the pancreas breaks down the glucose into sugar and protiens hope this helps

Prediction 1 best shows what the population could look like after many generations. Because, the long beak traits is having more life time.

Each characteristics in a living thing is created by a respective genetic coding in its body. The genetic code which is responsible for a particular behavior or appearance is called a genetic trait.

Here, the prediction 1 is best . It already saying that long-beak hummingbirds are more likely to survive, that baby survived long enough to pass on its mutation, so the long-beak trait became more common over generations.

Prediction 2 says abut a  genetic trait which is less fit to survive. Hence, cannot affect the next generation population. Therefore, prediction 1 is best.

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Your question is incomplete. But your complete question probably was:

Prediction 1 :Two hummingbirds with short or medium beaks had a baby with a mutation in its genes for the long-beak trait.

Prediction 2 is best. A hummingbird could have been born with a mutation in its genes for the long-beak trait and lived for a little while.

Answer:

What does the shape of an enzyme determine? The shape of the enzyme determines which chemical reaction it will speed up. -The region on an enzyme that the substrate fits into. ... The active site of an enzyme only fits one type of substrate molecule.

Explanation:

Answer:

becoz vvv is always with you

Answer:

Alkali metals have one valence electron on their outer shell. They are more stable when they have eight valence electrons so they tend to loose that one electron and obtain a full octet, therefore become stable

The weight percent of copper in bornite is approximately 63.316%.

The weight percent of copper (Cu) in bornite (Cu5FeS4) can be calculated by considering the atomic masses of copper (Cu), iron (Fe), and sulfur (S) and using the formula:

\(\[\text{{Weight percent of Cu}} = \frac{{\text{{Atomic mass of Cu}} \times \text{{Number of Cu atoms}}}}{{\text{{Formula mass of Cu5FeS4}}}} \times 100\%\]\)

Given that the atomic mass of Cu is 63.546 g/mol, the atomic mass of Fe is 55.845 g/mol, the atomic mass of S is 32.065 g/mol, and the formula mass of Cu5FeS4 is 501.849 g/mol, we can substitute these values into the formula:

\(\[\text{{Weight percent of Cu}} = \frac{{5 \times 63.546}}{{501.849}} \times 100\%\]\)

Simplifying the calculation gives:

\(\[\text{{Weight percent of Cu}} = 63.316\%\]\)

Therefore, the weight percent of copper in bornite is approximately 63.316%.

To calculate the gross value of the mining operation, we multiply the weight of the ore body (20,000,000 tons) by the cost per ton ($85):

\(\[\text{{Gross value}} = \text{{Weight of ore body}} \times \text{{Cost per ton}}\]\)

\(\[\text{{Gross value}} = 20,000,000 \times 85 = \$1,700,000,000\]\)

The expenses for the mining operation can be calculated by multiplying the weight of the ore body (20,000,000 tons) by the cost per ton ($85):

\(\[\text{{Expenses}} = \text{{Weight of ore body}} \times \text{{Cost per ton}}\]\)

\(\[\text{{Expenses}} = 20,000,000 \times 85 = \$1,700,000,000\]\)

The net value (profit or loss) of the mining operation can be obtained by subtracting the expenses from the gross value:

\(\[\text{{Net value}} = \text{{Gross value}} - \text{{Expenses}}\]\)\(\[\text{{Net value}} = \$1,700,000,000 - \$1,700,000,000 = \$0\]\)

Therefore, the net value of this mining operation is zero, indicating that there is neither profit nor loss.

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There are 210 kilocalories in a portion of food that contains 8 g protein, 10 g fat, and 22 g carbohydrate. The amount of vitamin C and water in the food does not contribute to the number of kilocalories, as they are not sources of energy.

Proteins are large, complex molecules that are made up of long chains of amino acids. They are essential for the growth, repair, and maintenance of tissues in the body, and are involved in a wide range of biological processes.

To calculate the number of kilocalories in a portion of food, we need to use the following formula:

Calories = (grams of protein x 4) + (grams of fat x 9) + (grams of carbohydrate x 4)

Using this formula, we can calculate the number of calories in the given portion of food:

Calories = (8 g protein x 4) + (10 g fat x 9) + (22 g carbohydrate x 4)

Calories = 32 + 90 + 88

Calories = 210 kcal

Therefore, in a portion of food that contains 8 g protein, 10 g fat, and 22 g carbohydrate there are 210 kilocalories.

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Answer:

Explanation:

Calcium and Beryllium are similar to Magnesium because all the three elements belong to the same group and have 2 valence electrons in their outer shell.

Potassium has 19 protons and - since the number of protons is the same as the number of electrons- also 19 electrons. To find out the number of neutrons you have to look at the atomic mass or weight of the element.

The balanced chemical equations for the given reactions are:

16Ag + S₈  →  8Ag₂S

2 Al + 3 Br₂  →  2 AlBr₃

2 KClO₃  →  2KCl  + 3 O₂

CH₄  + O₂  →  CO₂   + 2 H₂O

2Al  + 3 O₂  → Al₂O₃

2 H₂O₂  → 2 H₂O   + 2 O₂

A balanced equation can be defined as an equation in which the number of atoms of every element involved in the reaction is equal on either side of the chemical equation.

The law of conservation of matter has to be obeyed by a balancing of a chemical equation.

By following the law of conservation of matter, the total mass of the elements of reactants will be equal to the total mass of products in a balanced chemical equation.

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Answer:

50

Explanation:

If you want a percent as a decimal so you can divide you must make it a decimal for example in your case it would be like this, 0.05, then all you do is divide 1,000 by 0.05

Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

Answer:

They begin with a hypothesis or a research question.

Explanation:

Hope this helps!

The first step is an observation.

The second step is a hypothesis.

The third step is an experiment.

The fourth step is your result.

The fifth step is your conclusion.

Hope it helps you! :)

\(*GraceRosalia*\)

The statement that identifies an oxidation-reduction reaction is a reaction in which oxidation numbers change (option C).

A redox or oxidation-reduction reaction is a chemical reaction in which some of the atoms have their oxidation number changed.

In a chemical reaction that involves oxidation and reduction, the oxidation number of the involved ions either decreases or increases.

Therefore, the statement that identifies an oxidation-reduction reaction is a reaction in which oxidation numbers change.

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