A solution made by adding NaClO to enough water to make 2.00 L of solution has a pH of 10.50. Calculate the number of moles of NaClO that was added. Kb=3.3 x 10^-7

Answer:

12 moles of CO

Explanation:

According to Avogadro, one mole of a substance, contains the same number of elementary entities as 12g of carbon-12. Now the number of elementary entities (atoms, molecules, ions, particles etc) in any substance is given by the Avogadro's constant.

Now since 1 mole of a substance contains Avogadro's number of atoms, it means that the substance with the highest number of moles will have the highest number of atoms.

With this in mind we can see that 12 moles of CO is expected to contain 72.24 ×10^23 atoms of CO. Hence the answer.

Answer:

c. 11 moles of N2O.

Explanation:

Hello,

In this case, for each substance, we use the Avogadro's number to compute the number of atoms in the given sample:

a.

\(atoms \ C=9molCO_2*\frac{1molC}{1molCO_2} *\frac{6.022x10^{23}atoms\ C}{1molC} =5.4x10^{24}atoms\ C\)

\(atoms \ O=9molCO_2*\frac{2molO}{1molCO_2} *\frac{6.022x10^{23}atoms\ O}{1molO} =1.1x10^{25}atoms\ O\)

\(Total\ atoms=1.1x10^{25}+5.4x10^{24}=1.64x10^{25}atoms\)

b.

\(atoms \ Xe=10molXe *\frac{6.022x10^{23}atoms\ Xe}{1molXe} =6.022x10^{24}atoms\)

c.

\(atoms \ N=11molN_2O*\frac{2molN}{1molN_2O} *\frac{6.022x10^{23}atoms\ N}{1molN} =1.3x10^{25}atoms\ N\)

\(atoms \ O=11molN_2O*\frac{1molO}{1molN_2O} *\frac{6.022x10^{23}atoms\ O}{1molO} =6.6x10^{24}atoms\ O\)

\(Total\ atoms=1.3x10^{25}+6.6x10^{24}=2.0x10^{25}atoms\)

d.

\(atoms \ C=12molCO_2*\frac{1molC}{1molCO_2} *\frac{6.022x10^{23}atoms\ C}{1molC} =7.2x10^{24}atoms\ C\)

\(atoms \ O=12molCO_2*\frac{1molO}{1molCO_2} *\frac{6.022x10^{23}atoms\ O}{1molO} =7.2x10^{24}atoms\ O\)

\(Total\ atoms=7.2x10^{24}+7.2x10^{24}=1.44x10^{25}atoms\)

Thus, we notice 11 moles of N2O have the greatest number of atoms.

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Answer: bar graph, core sport participation by demographic, red and blue, the difference between the ages that people played sports as well as the genders.

:)

If 6-25% of the original percent nuclei were left in the sample, then the sample would be about 12,000 years old.

The daughter nuclei in the sample are found at a rate of 1/5730 = 0.0013% per year, or 13% per thousand years.

We do this by using a mass spectrometer. A mass spectrometer can break down any compound into its constituent parts, and then measure each part individually. When we do this for carbon-14, we find that there are 5730 years until half of it decays away—that's when we can add another 6% of it to our sample and expect to have another 5730 years until half of that decays away as well.

So if 6% of the original amount was left in the sample after 5730 years (half life), then there must be 5730 * 0.06 = 1520 daughter nuclei still present (in percent) in the same sample after 5730 years.

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Answer:

Yes

Explanation:

The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand "into" anything and does not require space to exist "outside" it.

Answer:

The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).

Explanation:

Answer:

9,000, 100 has 7 significant figures

Explanation:

Answer:

Born Again Raw Feeders

The number of moles in 33g of carbon dioxide is 0.75 moles.

A mole refers to the amount of a substance that contains as many elementary units as can be found in 12g of Carbon-12. It can also be a number of a substance /particles, such as atoms or ions. molecules or electrons.  The number of particles is approximately 6.02* 10²³ in magnitude and is called Avogadro's number of particles. it can be denoted with 'mol'.

n = m/Mm

Where,

n = number of moles of the substance (or element)

m= mass of the substance (or element)

Mm=Molar mass of the substance (or element)

we must first divide the sample size by the molar mass of carbon dioxide= C0₂

            =(6*2 ) + (8 * 2)*2

              =44. g.

the number of moles  of carbon dioxide molecules in 33 grams of carbon dioxide=m/Mm

         n =33÷44

            =0.75 moles.

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Answer:

12.66g

Explanation:

42.2% of 30.0g

=42.2/100 * 30.0

=0.422*30.0

12.66g

Answer: 1.414 mol Cl-  

Explanation:

First, let's find the moles of BeCl2.

1.79 M = 1.79 mol/L

395 mL = 0.395 L , since 1L = 1000 mL

Using stoichiometry,

1.79 mol/L *0.395 L = about 0.707 mol BeCl2

Now, we have 0.707 mol of BeCl2, but we are trying to find moles of Cl-

There are two chloride ions in each molecule of BeCl2, so there will be twice as many moles as well.

0.707 mol BeCl * (2 mol Cl- / 1 mol BeCl) = 1.414 mol Cl-  

Hope this helps!

Answer:

84.00g CO2 * 1mol CO2/44.009g CO2 * 25mol O2/16mol CO2 * 31.998g O2/1mol O2 = 95.43g O2

Explanation:

Here is the answer in picture form

H2O(s) floats on H2O(l) when both are at 0°c because ice is lighter than water which causes water to displace ice.

The density of a substance is calculated by the ratio of the mass of the substance to the volume of the substance.

Ice structure is cage like with more intermolecular spacing and Hydrogen bonds are stable. Water structure is linear and Hydrogen bonds form and reform. It causes more volume for same mass in ice and less volume for same mass in water.

At 0°C the density of ice is less than density of water. At 0°C, density of water is 1.0 gm/cm³ and density of ice is 0.931 gm/cm³, so water causes ice to displace resulting in ice floating over the water.

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The approximate resistance value at 45 degrees Celsius is around 5.8 ohms.

To calculate the value of the resistance temperature coefficient at 45 degrees Celsius using linear approximation, we can use the formula:

R(T) = R0 + α(T - T0),

where R(T) is the resistance at temperature T, R0 is the resistance at a reference temperature T0, α is the resistance temperature coefficient, and (T - T0) is the temperature difference.

Given that the resistance at 25 degrees Celsius is 5 ohms (R0 = 5) and the resistance at 50 degrees Celsius is 6 ohms (R(T) = 6), we can calculate the value of α.

6 = 5 + α(50 - 25),

Simplifying the equation:

1 = 25α,

Therefore, α = 1/25 = 0.04 ohm/degree Celsius.

Using the linear approximation, we can approximate the value of the resistance at 45 degrees Celsius:

R(45) = 5 + 0.04(45 - 25) = 5 + 0.04(20) = 5 + 0.8 = 5.8 ohms.

Therefore, the value of the resistance at 45 degrees Celsius is approximately 5.8 ohms.

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Bonding gels and gel primers are designed specifically to improve adhesion of light cured gels to the natural nail plate and is therefore denoted as option C.

This is defined as the tendency of particles or substance which have dissimilar origins to stick to one another. A common adhesive is referred to as glue, cement etc  and ensures there is enough resistance for their separation in case of the presence of any type of external force or stimuli acting on them.

Gel primer is referred to a vital used in makeup and serves as a form of foundation before they are applied on the skin of individuals so as to enable it stick and also look more presentable.

This is therefore the reason why gel primers was chosen as the most appropriate choice.

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It represents an amine group.

Answer: option C

Explanation: As they belong to same group

Answer:

Delta

Explanation:

Delta is a not a type of nuclear decay. Most times, the delta sign is used to denote a change between the initial and final states of a reaction.

There are three main types of nuclear decay which are:

Answer:

It will explode, I have plenty of research on this. Let me know if you want the sources. :)

Explanation:

Answer:

Explanation:

There will be no reaction when carbon tetrachloride is added to water.  This is because the two substances do not mix.  It is not due to density difference (like the case of Mercury and water) but rather carbon tetrachloride is non-polar while water is polar.  So they will separate and form two different layers with no reaction happening.

Some uses of a watch glass in the laboratory are to cover a beaker or a flask and to hold small quantities of a substance.

A watch glass is a piece of lab equipment that is a shallow, convex dish used in chemistry and biology labs. It is named for its resemblance to a pocket watch. Here are some uses of a watch glass in the laboratory:

1. To cover a beaker or a flask: Watch glasses are frequently used to cover beakers or flasks when heating solutions. This prevents the liquids from splashing out while still allowing gases to escape.

2. To hold small quantities of a substance: Watch glasses are useful for holding small amounts of a substance. They may also be utilized to weigh tiny quantities of powders by utilizing an analytical balance.

3. To evaporate small amounts of liquid: Watch glasses may be utilized to evaporate tiny amounts of liquids. If a small quantity of a solution must be evaporated, for example, a few drops of water, it can be placed on a watch glass and allowed to evaporate on its own.

4. To perform simple reactions: Watch glasses may be utilized to carry out simple chemical reactions. If a few drops of one solution are mixed with a few drops of another, for example, the reaction can be observed on a watch glass.

5. As a support for crucibles: Watch glasses can be utilized to support crucibles. They are placed under a crucible to prevent direct contact with a hot plate or a wire gauze, which can cause damage to the crucible.

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Answer:

Include:

--Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

--Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

--Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

I Hope This Helps You!

Answer:

Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Explanation:

edge.

Answer:

Explanation:

i may be wrong but i think its b

Answer:

B Ndaira is right for real

In this experiment, we have various components labeled as a, b, c, d, e, f, g, j, and l.Let's analyze each component to determine if it is an element, compound, or mixture.

a: We are given that when 10 g of a is heated, 4.4 g of b is given off, leaving 5.6 g of e. This suggests that a is a compound, as it can be broken down into b and e.
b: 4.4 g of b is given off when a is heated, and the same quantity of b can be made by adding 1.2 g of c and 3.2 g of d. This indicates that b is a compound formed by the combination of c and d.
c and d: These components are combined to produce b, indicating that they are elements.
e: 5.6 g of e remains after the production of b. It combines with water to give a 1.3 g ppt of j per gram of e and also produces l, a homogeneous material. This suggests that e is a compound that can react with water to form a precipitate (j) and a homogeneous material (l).
f and g: These are the products of electrolyzing

e. They cannot be broken down further chemically, indicating that they are elements.
j: It is formed as a precipitate when e reacts with water, suggesting that j is a compound.
l: It is produced when e combines with water, indicating that l is a homogeneous material.

In summary:
1. a: Compound
2. b: Compound
3. c: Element
4. d: Element
5. e: Compound
6. f: Element
7. g: Element
8. j: Compound
9. l: Homogeneous material

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It would take approximately 672 seconds or 11 minutes and 12 seconds to walk to school at an average speed of 2 m/sec.

The average speed is the total distance traveled divided by the total time taken to cover that distance. It is a measure of how fast an object or a person moves on average.

The unit of average speed is usually expressed in kilometers per hour (km/h) or miles per hour (mph) in the English system. For example, if a car travels a distance of 100 kilometers in 2 hours, its average speed is 50 km/h.

To calculate the time it would take to walk to school, we can use the formula:

time = distance / speed

where distance is the distance between home and school, and speed is the average walking speed.

Plugging in the given values, we get:

time = 1344 meters / 2 m/sec

time = 672 seconds

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Breaking bonds in the reagents, rearranging those atoms into new groups (the products), and creating new bonds in the products are all components of a chemical reaction.

In a chemical reaction, one or more chemicals, usually known as reactants, change into one or more other compounds, frequently referred to as products. Chemical parts or chemical elements make up substances. A response is a behavior, propensity, or course of action that is different from what was first intended. Decisions are taken in the heat of the moment without much thought or consideration of the potential repercussions. Reaction: Making a declaration in response to another person's action or remark.

Changes in color, temperature, gas production, or precipitant formation are common outcomes of chemical reactions. Combustion, digestion, and cooking are a few straightforward instances of daily reactions.

Atoms create and break chemical bonds during chemical reactions. Reactants are the molecules that initiate a chemical reaction,

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The root mean square speed of Cl₂ molecule is 11.34 cm/sec.

Solution

We need to calculate the root mean square speed of Cl₂ molecule.

Average kinetic energy = RT

where,

R = Molar gas constant

T = absolute temperature in Kelvin.

Given,

Average kinetic energy = 4570 J/mol

R= 8.314 J/mol/K

So, T = (4570 × 2)/(3 × 8.314)

⇒ T = 366.45 K

Root mean square velocity = √(3RT/M)

For, Cl₂ molecule,

M = 71 g/mol

T = 366.45 K (as condition is same as previous)

Therefore, Root mean square velocity = 11.34 cm/sec

Hence, Root mean square velocity = 11.34 cm/sec.

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The principle of option D. Uniformitarianism states that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the

Option D. Uniformitarianism is the principle stating that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the geologic past. It is based on the idea that the present is the key to the past. In other words, the same natural laws that operate in the universe today have been operating since the beginning of time.

James Hutton was the first to propose this principle in the late 18th century. He suggested that the Earth was shaped by slow-acting geological forces such as erosion, sedimentation, and uplift over long periods of time. He believed that the same processes were still happening today and that they had operated in the past.

This principle is an important concept in geology because it allows scientists to interpret the Earth's history based on the processes that they observe today. By understanding how these processes work and how they have changed over time, scientists can reconstruct the history of the Earth and its environments.

Uniformitarianism has been tested and proven through many observations and experiments. For example, the study of sedimentary rocks has shown that they were formed in the past through the same processes that are observed today, such as deposition of sediment by water, wind, or ice.

Similarly, the study of volcanoes has shown that they are formed by the same processes as today, such as the movement of magma from deep within the Earth.

In conclusion, Uniformitarianism is the principle that allows us to interpret the Earth's history by observing the processes that shape it today. It is a fundamental concept in geology and has been tested and proven through many observations and experiments.

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