a 60.ml sample of naoh(aq) was titrated with 0.10mhcl(aq) . based on the resulting titration curve shown above, what was the approximate concentration of naoh in the sample?

the two methods scientist use to gather information are

. observing the natural world

. carrying out investigation

Answer:

Adding base causes the pH of a solution to increase

pH is a measure of the hydrogen ion concentration of a system. Solutions with a low pH possess a high concentration of hydrogen ions, while solutions with a high pH possess a low concentration of hydrogen ions. To increase the pH of a solution, base can be added to it. Base will release hydroxide ions (OH-) in the solution which will neutralize or reduce the H+ ions concentration in the solution. This way the pH is increased.  

Explanation:

Answer:

As you can see sodium = ionic and covalent bonds aka NA 2

and CO 3 also has those two bonds the other answers dont have both numbers (bonds) Na2 and CO3 is the only answer choice that has these bonds in simpler terms ( only answer with 2 numbers)

Explanation:

The butene chemical formula is (CH2)4 = C4H8.

Example

100 g of gas are used.

C = 85.63 g / 12 g/mol = 7.1358 mol when the proper atomic mass is divided by it.

H = 14.37g/1g/mol = 14.37mol

C = 1 and H = 2 divided by smaller division

Data formula for empirical research: CH2

The volume of one mole of gas is 22.4 L at STP, or 22 400 mL.

22400 mL divided by 258 mL and 0.646 g, or 56.868 g/mol, is the gaseous mass per mole.

CH2 mass in formula equals 14g/formula units in 1 mol, which is equal to 56.868 g/mol/14g/formula unit, or 4formula units per mol.

(CH2)4 = C4H8 is the butene chemical formula.

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Answer:I believe it forced convections

Explanation:convection is the circular motion that happens when warmer air or liquid makes something less dense.

Answer:

how y'all doinnn

Explanation:

byyeee

Answer:

\( H_2SO_4\)

Explanation:

\( H_2SO_4\) (sulphuric acid) is the acid in the given reaction.

The acid present in the chemical equation is sulfuric acid  with chemical formula H₂SO₄.

Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste.Compounds such as HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.

According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic  acids  depending on the number of protons which are liberated on dissociation.

Acids are widely used in industries  for  production of fertilizers, detergents  batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.

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Answer: catabolism

Explanation:

Catabolism refers to the set of metabolic pathways which is necessary for the breaking down of molecules into smaller units. This is then oxidized for the release of energy or can be used to perform other anabolic reactions.

Catabolism is regarded as the opposite direction of anabolism which is simply the building-up of molecules. It should be noted that anabolism and catabolism work together in every living organisms and perform functions such as the production of energy and the repair of cells.

C3Cl3N3 is the correct answer.

What is atomic mass?

Atomic mass is the mass of a single atom of an element, usually expressed in atomic mass units (amu). One atomic mass unit is defined as exactly 1/12 the mass of a carbon-12 atom. Atomic mass is a weighted average of the masses of all naturally occurring isotopes of an element, taking into account their relative abundances. The atomic mass of an element is important in various fields, including chemistry, physics, and biology, as it affects the element's chemical and physical properties, such as its reactivity, density, and melting point.

Molecular formula = (Empirical formula) × n

184.5 g/mol = 14 × (12.011+1.008) =  Molecular formula

Therefore, C3Cl3N3 is the molecular formula

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We need to write the balanced chemical equation for the reaction that forms one mole of the compound from its constituent elements. This reaction is: Cr(s) + 3/2 N2(g) + 9/2 O2(g) → Cr(NO3)3(s)

A standard formation reaction is a chemical reaction that forms one mole of a compound from its constituent elements under standard conditions of temperature and pressure. In this case, we need to write a balanced chemical equation for the standard formation reaction of solid chromium(III) nitrate.
Firstly, we need to identify the elements present in the compound. Chromium(III) nitrate contains the elements chromium (Cr), nitrogen (N), and oxygen (O).
Next, we need to write the balanced chemical equation for the reaction that forms one mole of the compound from its constituent elements. This reaction is:
Cr(s) + 3/2 N2(g) + 9/2 O2(g) → Cr(NO3)3(s)
This equation shows that one mole of solid chromium(III) nitrate is formed from one mole of solid chromium, 1.5 moles of nitrogen gas, and 4.5 moles of oxygen gas under standard conditions.
In summary, the standard formation reaction for solid chromium(III) nitrate is:
Cr(s) + 3/2 N2(g) + 9/2 O2(g) → Cr(NO3)3(s)

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Answer:

Answer: everything except E

Explanation: There was no dramatic change in temperature and i just took the assignment.

According to the law of conservation of matter, matter cannot be created not be destroyed. In this experiment, no matter loss will occur but there will be rapid evolution hydrogen gas and the balloon will expand.

According to conservation of matter, matter can neither be created nor be destroyed but its state and properties can be changed. The total mass of the reactants will be equal to the total mass of the products.

Magnesium is a second group element and is a metal. Metal reacts with  hydrogen halides to form metal halides and hydrogen gas as the reaction written below:

\(Mg +2 HCl \rightarrow MgCl_{2} +H_{2}\)

The evolved hydrogen gas in this reaction tries to diffuses out the sealing and thus the balloon cover expands.  And thus the solid magnesium metal disappears to form magnesium chloride.

The evolution of gases is exothermic and therefore,  the temperature outside increases suddenly.  There we can see bubbles of hydrogen  in the reaction system.

Therefore, the changes that occur in the experiments are, rapid evolution of gases, solid metal disappears, sealing cover expands and there occur a rapid change in temperature. Thus options A,C,D,E are correct.

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The given statement is False. The cumulative incidence of disease for the three-year period will not necessarily equal the prevalence of disease measured on the last day of the study period.

Cumulative incidence measures the number of new cases of a disease that occur within a specific time period in a population initially free of the disease.

On the other hand, prevalence measures the proportion of individuals in a population who have the disease at a particular point in time, regardless of when they developed it.

Prevalence is influenced by both the incidence and duration of the disease, while cumulative incidence only considers the occurrence of new cases. Therefore, the two measures can be different, and the statement is false.

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Answer:

d

Explanation:

Answer:

Precipitate

Explanation:

Precipitate usually forms when two or more chemicals are added and a solid deposits at bottom of test tube or floats as chunky solid.

For example, when you put AgNO3(aqueous) + KCl(aqueous) —–> AgCl(precipitate) + KNO3(aqueous). You'll see a white percipitate form which AgCl.

Here's a pic of diff colors of ppt you can make

The mysterious element with atomic number 88 is Radium.

Radium is a naturally occurring radioactive element. It is chemically represented with the symbol Ra. The atomic number of this number is 88 and this is a radionuclide.

This element is formed by the decay of Uranium and Thorium. This element also exists in isotopes and its isotopes are Ra-226 and Ra-228. The Radium-226 isotope is formed as a result of the decay series of Uranium whereas Radium-228 and Radium-224 are formed as a result of the Thorium decay series.

Like elemental radium, all isotopes of Radium are radioactive. It decays and produces Radon gas, which is a highly stable Noble gas.

Thus, the mysterious element with atomic number 88 is Radium.

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Answer:

5 A1C13(aq) + 3 MnCl2(aq) + 3 KCl(aq) + 8 H20(1)

Explanation:

the products are on the right side of the arrow

The percent by mass results obtained would be higher than the actual value. This is because the mass of the vinegar delivered was consistently less than the desired amount, resulting in a lower total mass of vinegar used in the calculation.

As a result, the ratio of the mass of acetic acid (the solute) to the total mass of the solution (solute + solvent) would be higher, leading to an overestimated percent by mass value.

In order to calculate the percent by mass of acetic acid in vinegar, one needs to know the mass of acetic acid and the total mass of the solution. The volume of vinegar is not directly related to its mass, as the density of vinegar may vary. Therefore, the student's incorrect pipet, which consistently delivered less vinegar than intended, would lead to a lower total mass of vinegar used in the calculation. As a result, the calculated percent by mass of acetic acid would be higher than the actual value. This is because the ratio of the mass of acetic acid to the total mass of the solution would be higher, as the denominator (total mass) is underestimated due to the consistently lower volume of vinegar delivered.

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Answer:

GaCl3

Explanation:

Gallium trichloride | GaCl3 |

Answer:

GaCl3

Explanation:

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

nah man

Explanation:

Answer:

0.24%

Explanation:

A toothpaste contains 0.24% by mass sodium fluoride (NaF) used to prevent dental caries and 0.30% by mass triclosan, C12H7Cl3O2, a preservative and antigingivitis agent. One tube contains 119 g of toothpaste. (6.4, 6.5) Components in toothpaste include triclosan and NaF.a. How many moles of NaF are in the tube of toothpaste?b. How many fluoride ions (F?) are in the tube of toothpaste?c. How many grams of sodium ion (Na+) are in 1.50 g of toothpaste?d. How many molecules of triclosan are in the tube of toothpaste?Solution 124CQStep 1 of 4:Given:Mass of toothpaste = 119 g. Mass percent of sodium fluoride (NaF) = 0.24%Mass percent of triclosan (C12H7Cl3O2) = 0.30%a. Here, we are asked to find the number of moles of NaF in the tube of toothpaste.Mass percent of sodium fluoride (NaF) = 0.24%First, let’s find the mass of NaF in the tube: = 119 g = 0.2856 grams Molar mass of NaF = 41.98 g/mol This means, 1 mol NaF = 41.98 g. So, the mole-mass factor is: and Therefore, number of moles of NaF will be: = 0.2856 g NaF = 0.00680 mol NaFHence, the number of moles of NaF in 119g toothpaste is 0.00680 moles. ________________

According to mole concept, there are 41.988 grams   in 1 mole NaF that is sodium fluoride.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

Number of moles is given by the formula, mass/molar mass and hence mass= 1×41.988= 41.988 g.

Thus, there are 41.988 g in 1 mole NaF.

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Answer:

It has two valence electrons

Answer:Base A is the weakest conductor electricity

Explanation:

Dissociation is a factor that affects electrical conductivity. The greater the percentage of dissociation for bases the stronger the conductivity of electricity.

Given that

Base A dissociates 25% in water

Base B dissociates 50%.

Base C dissociates 75%

We can conclude that  Base A is the weakest conductor oelectricity since it has the lowest percentage of dissociation.

The empirical formula of the given compound is \(\bold{SO_3}\).

The correct option is B.

The empirical formula of a chemical compound is the simplest whole-number ratio of atoms contained in the substance.

Given,

1.0 g of S

1.5 g of O

To calculate the empirical formula, we will divide the masses of the elements by their atomic weight.

For sulfur

\(\bold{\dfrac{1.0}{32} =0.03125\; mol}\)

For oxygen

\(\bold{\dfrac{1.5}{16} =0.09375\; mol}\)

Now, divide the greater value of mole came by the smaller value

\(\bold{\dfrac{0.09375\; mol}{0.03125\;mol} = 3}\)

Thus, the empirical formula for the given compound is 1 for S and 3 for O

\(\bold{SO_3}\)

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Answer: I don't have the ability to conduct physical experiments or obtain solutions. However, I can provide you with some general information about the properties of CoCl2.6H2O in EtOH and H2O.

Cobalt chloride hexahydrate (CoCl2.6H2O) is a crystalline solid that is soluble in both water and ethanol. When dissolved in water, it forms a pink-colored solution due to the presence of hydrated cobalt ions. In contrast, when dissolved in ethanol, it forms a blue-colored solution due to the formation of a complex between cobalt ions and ethanol molecules.

The addition of CoCl2.6H2O to water or ethanol should result in the formation of a homogenous solution with a characteristic color. The color of the solution will depend on the solvent used and the concentration of the CoCl2.6H2O solution.

The statement that would compare the two isotopes of helium is b: they have a different number of neutrons

Isotopes is the word used in chemistry for the atoms of the same element that have different numbers of neutrons but consist of the same number of electrons and protons. The difference in the number of neutrons between the isotopes of an element illustrates that the various isotopes have different masses from each other.

Helium-4 and helium-5 differ in the number of neutrons as helium-4 has 2 neutrons and is the most stable isotope of helium. On the other hand, helium-5 is an unstable isotope consisting of three neutrons.

As isotopes do not differ in the number of protons and electrons; both these isotopes of helium have two protons.

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The "air" that puffs up a potato chip bag is primarily composed of nitrogen gas (N₂).

Nitrogen gas is used for packaging due to its non-reactive nature. When the bags are filled with nitrogen gas, it displaces the oxygen inside, creating a controlled atmosphere. This is done to prevent the chips from getting stale. Oxygen can lead to oxidative reactions, causing the chips to go rancid or lose their crispiness. Nitrogen, being an inert gas, doesn't react with the chips or affect their taste or texture.

It acts as a protective barrier, shielding the chips from moisture and oxygen, thereby maintaining their freshness and extending their shelf life. The use of nitrogen gas ensures that the chips remain crispy and flavorful when you open the bag.

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A. 2

B. 3

C. 4

D. 5A. 2

B. 3

C. 4

D. 5A. 2

B. 3

C. 4

D. 5