100. The compound Na FCN).NOJ is known as
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The asbestos exposure during the years 1982 and 1983 was 2.5 fibers per cubic centimeter and 0.8 fibers per cubic centimeter respectively. So asbestos exposure decreased by 1.7 fibers per cubic centimeter during the year 1983.

Breathlessness Persistent, dry cough Chest pain or tightness Lack of a dry, crackling sound in the lungs when you breathe in Wider and rounder fingers and toes are some of the symptoms of asbestos exposure.

The largest group of people exposed to asbestos is those working in the construction industry. Historically, asbestos was also used by pipe fitters and shipyard workers. In addition, asbestos was used by military personnel, auto mechanics, and many other occupations.

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The evidence from the article highlights these practices as effective means of improving water quality. By implementing these measures, both individuals and governmental agencies can contribute to the preservation and protection of water resources.

According to the article, there are several practices that members of the public and governmental agencies can adopt to improve water quality:

Implementing proper wastewater management: This involves treating wastewater before it is released back into the environment. The article emphasizes the importance of implementing advanced treatment technologies to remove pollutants effectively.Promoting sustainable agriculture: The article highlights the significance of adopting practices that minimize the use of fertilizers and pesticides, such as precision agriculture techniques. These practices can reduce the runoff of agricultural chemicals into water bodies.Establishing buffer zones: Creating vegetated buffer zones along rivers, lakes, and streams can help filter and absorb pollutants, preventing them from entering the water bodies. The article suggests that buffer zones should be implemented to reduce sediment, nutrient, and pesticide runoff from adjacent fields.Encouraging responsible industrial practices: The article emphasizes the need for industries to adopt eco-friendly practices, including proper disposal of industrial waste and the use of environmentally friendly production techniques.

Raising awareness and education: Public education campaigns can play a crucial role in improving water quality. The article suggests that educating the public about the impact of their actions on water bodies and providing information on sustainable practices can lead to positive changes.

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The final broth temperature will be approximately 38.4°C.

When mixing two substances with different temperatures, we can use the principle of conservation of energy. The energy lost by the hot substance (broth) is equal to the energy gained by the cold substance (water), assuming no energy is lost to the surroundings. This can be expressed using the equation:

Q_lost = Q_gained

The energy lost by the broth can be calculated using the formula:

Q_lost = m_broth * c_broth * (T_final - T_initial)

where m_broth is the mass of the broth, c_broth is its specific heat capacity, T_final is the final temperature, and T_initial is the initial temperature of the broth.

Similarly, the energy gained by the water can be calculated using:

Q_gained = m_water * c_water * (T_final - T_initial)

Since the two substances reach thermal equilibrium, we can set Q_lost equal to Q_gained:

m_broth * c_broth * (T_final - T_initial) = m_water * c_water * (T_final - T_initial)

Plugging in the given values and solving for T_final, we find that the final temperature of the broth is approximately 38.4°C.

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Based on the given reactions, the compounds are as follows:

A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.

B: The product formed when compound A reacts with 2H2O.

C: The product formed when compound B reacts with K2CO3(aq).

D: The product formed from the heat-induced reaction of compound C.

E: The product formed when compound D reacts with HBr.

Based on the given reactions, let's analyze the compounds involved:

Reaction 1: prop-1-yne + 2HBr/H2O2 = A

The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.

Reaction 2: A + 2H2O = B

Compound A reacts with 2H2O (water) to form compound B.

Reaction 3: B + K2CO3(aq) = C

Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.

Reaction 4: C + heat = D

Compound C undergoes a heat-induced reaction to form compound D.

Reaction 5: D + HBr = E

Compound D reacts with HBr (hydrobromic acid) to form compound E.

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When you have a small number and you are making it bigger, the exponent will be a negative number. You'll need to move the decimal point between the first two numbers after the 0's so in this case, the decimal point will go between the 9 and the 5.

The final answer after rounding will be \(9.54\) × \(10^{-3}\).

Answer:

C.

Explanation:

The other ones just don't make sense as answers to the question

Answer:

B

Explanation:

ice molecules move slowly and cluster tightly together, they produce a low amount of heat

Hope this answer helps you

Answer:

Carbon alone forms the familiar substances graphite and diamond. Both graphite and diamond are made only of carbon atoms. Graphite is very soft and slippery. Diamond is the hardest substance known to man. If both are made only of carbon what gives them different properties?

The answer lies in the way the carbon atoms form bonds with each other.

Explanation:

Approximately 63.5% of the compound AgNO3 is made of silver.

The atomic mass of silver (Ag) is 107.87 g/mol, and the atomic mass of nitrogen (N) is 14.01 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol.

The molecular weight of AgNO3 is:

AgNO3 = (Ag atomic mass) + (N atomic mass) + (3 x O atomic mass)

AgNO3 = (107.87 g/mol) + (14.01 g/mol) + (3 x 16.00 g/mol)

AgNO3 = 169.87 g/mol

The percent by mass of silver in AgNO3 can be calculated as:

Percent by mass of silver = (Mass of silver / Total mass of AgNO3) x 100

Since there is only one silver atom in one AgNO3 molecule, the mass of silver in one mole of AgNO3 is equal to the atomic mass of silver, which is 107.87 g/mol.

Therefore, the percent by mass of silver in AgNO3 is:

Percent by mass of silver = (107.87 g/mol / 169.87 g/mol) x 100

Percent by mass of silver = 63.5%

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Based on these electronegativities, HCI would be expected to have polar covalent bonds and contain H+ ions.

Mathematically,

% of ionic character = 16(Xa - XB ) + 3.5(XA - Xb )

=16(3-2.1)+3.5(3-2.1)²

= 14.4+2.835

= 17.235%

:. The nature of HCI is 17.2% ionic

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The First step is to write and balance our reaction:

Mg + Br2 → MgBr2

As we can see Mg and Br2 have a charge equal to zero. Therefore, on the right side, we must have a zero electrical charge too.

--------------

The second step is to analyze what happens to each of them when the reaction occurs.

Mg) On the left, its oxidation state is 0, then in MgBr2, Mg has a +2 charge. So, we can say that if the atom goes from 0 to +2, it loses electrons (loses negative charges or gain positive charge). We can also say that Mg oxidized.

Until here, the atom that loses electrons gets oxidized.

Br)On the left, Br starts with 0, then in MgBr2, it has -1. So we can say that Br gained electrons (gain negative charge). We can also say that Br is reduced.

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The 3rd step is to find the right statement.

Answer: The magnesium atom is losing electrons; therefore, it is oxidized.

The spontaneity of a reaction depends on the temperature, enthalpy and entropy.

A reaction is said to be spontaneous if it can proceed on its own without a further input of energy.

In the first case, when the enthalpy is less than zero and the entropy is greater than zero, the reaction is spontaneous at all temperatures.

In the second case, when the enthalpy greater than zero and the entropy is greater than zero, the reaction needs to proceed at high temperatures to be spontaneous.

In the third case, when the enthalpy is greater than zero and the entropy is less than zero, the reaction ought to proceed at low temperature in order to be spontaneous.

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Answer:

1.Spontaneous at all temperatures

2. Spontaneous only at high temperatures

3. Non spontaneous at all temperatures

4. Spontaneous only at low temperatures

Explanation:

Just did it on edge

Answer:

Scientia

Explanation:

Sample Essay On What Science Means to You The word 'science' is derived from the Latin word 'Scientia' which means knowledge. Therefore, science is about gaining knowledge either through observing, studying, experience, or practice.

Answer:

one to two inches (three to five centimeters) per year.

Explanation:

Answer:

1 to 2 inches (3 to 5 centimeters) per year

Explanation:

It depends on what plates your talking about, but in general, they move apart anywhere from 1 to 2 inches (3 to 5 centimeters) per year.

Specifically, though, The Arctic Ridge has the slowest rate (less than 2.5 cm/yr), and the East Pacific Rise near Easter Island, in the South Pacific about 3,400 km west of Chile, has the fastest rate (more than 15 cm/yr).

Explanation:

hi sorry I wasn't able to find Nz on periodic Table may be just missed it so just find mr of Nz and times it by moles hope this helps

The type of compound represented by the graph at right is a strong acid (option B).

An acid is generally any compound capable of dissociating into its respective constituent ions when in an aqueous solution.

An acid is categorised as strong or weak depending on whether it can dissociate completely or partially. A strong acid dissociates completely in water.

According to this question, HA, when added to water, dissociates into H+ and A- ions, hence, is a strong acid.

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Answer:

Cools Very Quickly

Explanation:

This is the right answer!

Answer:

Expensive and low storing capacity.

Explanation:

The storing of renewable energy is a big challenge for us because this renewable energy can't be stored for a long due to expensive and low storing capacity. There are two challenges about the storing of renewable energy is that the battery are very expensive and can store very less amount of energy which makes unable to store the renewable energy. The scientists should make a storing device which is not too much expensive and has more storage capacity.

In the given reaction, the limiting reactant is C₆H₆ (benzene).

To determine the limiting reactant as well as calculate the mass of HCl produced, compare the moles of each reactant.

The number of moles for each reactant:

Molar mass of Cl₂ = 35.5 g/mol + 35.5 g/mol = 71 g/mol

Moles of Cl₂ = mass of Cl₂ / molar mass of Cl₂

                     = 45 g / 71 g/mol

                     = 0.634 moles of Cl₂

Molar mass of C₆H₆ (benzene) = 12 g/mol + 6(1 g/mol) = 78 g/mol

Moles of C₆H₆ = mass of C₆H₆ / molar mass of C₆H₆

                        = 45 g / 78 g/mol = 0.577 moles of C₆H₆

Determine the stoichiometry between Cl₂ and HCl:

Cl₂ + C₆H₆ → C₆H₅Cl + HCl

Here, we can see that 1 mole of Cl₂ produces 1 mole of HCl.

Thus, the limiting reactant is C₆H₆ (benzene).

Calculate the mass of HCl produced:

Molar mass of HCl = 1 g/mol + 35.5 g/mol = 36.5 g/mol

Moles of HCl produced = moles of C₆H₆ = 0.577 moles

Mass of HCl produced = moles of HCl produced × molar mass of HCl

Mass of HCl produced = 0.577 moles × 36.5 g/mol

                                     ≈ 21.04 g

Therefore, approximately 21.04 grams of HCl will be produced.

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Answer:

B. It boils at a higher temperature than water boils.

Explanation:

The correct answer is B. Oxygen boils at a higher temperature than water boils.

Water has a boiling point of 100°C and a freezing point of 0°C, so it turns into a solid at a higher temperature than oxygen.

Oxygen can be found naturally as a solid on Earth, such as in the form of dry ice (solid carbon dioxide) or in certain minerals. However, it is more commonly found as a gas in the Earth's atmosphere.

The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

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Answer:

C

Explanation:

It is run by Elon Musk, who is determined to get to Mars.

Answer: Solubility increases so more solute dissolves

Explanation:

The solubility is a measure of the concentration of the dissolved gas particles in the liquid and is a function of the gas pressure. As you increase the pressure of a gas, the collision frequency increases and thus the solubility goes up, as you decrease the pressure, the solubility goes down.

Answer:

Ge: [Ar] 3d10 4s2 4p2 => 6 electrons in the outer shell

Br: [Ar] 3d10 4s2 4p5 => 7 electrons in the outer shell

Kr: [Ar] 3d10 4s2 4p6 => 8 electrons in the outer shell

Explanation:

The electron affinity or propension to attract electrons is given by the electronic configuration. Remember that the most stable configuration is that were the last shell is full, i.e. it has 8 electrons.

The closer an atom is to reach the 8 electrons in the outer shell the bigger the electron affinity.

Of the three elements, Br needs only 1 electron to have 8 electrons in the outer shell, so it has the biggest electron affinity (the least negative).

Ge: needs 2 electrons to have 8 electrons in the outer shell, so it has a smaller (more negative) electron affinity than Br.

Kr, which is a noble gas, has 8 electrons and is not willing to attract more electrons at all, the it has the lowest (more negative) electron affinity of all three to the extension that really the ion is so unstable that it does not make sense to talk about a number for the electron affinity of this atom.

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Approximately 166.67 mL of water needs to be evaporated from 250 mL of 1 M Ca(OH)2 to make it 3 M.

The relationship between the initial and final concentrations and volumes must be taken into account.

Given: Initial concentration \((C^1) = 1 M Initial volume (V^1) = 250 mL\)

\((C^2) = 3 M final concentration\)

We can use the equation:

\(C^1 * V^1 = C^2 * V^2\)

Where:

\(V^2\)is the final volume of the solution

Rearranging the equation to solve for V2:

\(V^2 = (C^1 * V^1) / C^2\)

Substituting the given values:

\(V^2 = (1 M * 250 mL) / 3 M\)

\(V^2 = 250 mL / 3\)

\(V^2\) ≈ \(83.33 mL\)

To find the amount of water that needs to be evaporated, we subtract the final volume from the initial volume:

Amount of water to be evaporated = \(V^1 - V^2\)

Amount of water to be evaporated = 250 mL - 83.33 mL

Amount of water to be evaporated ≈ 166.67 mL

Therefore, approximately 166.67 mL of water needs to be evaporated from 250 mL of 1 M Ca(OH)2 to make it 3 M.

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Answer:

M= ml - 45301 - 11.59M.

Explanation:

Answer:

A) It indicates the direction in which the reaction occurs.

Explanation:

The reason we don't use equals signs (=) in chemical reactions is because of the Identity Property of Equality (if a = b then b = a), which would allow us to reverse reactions. Reactions can't just be reversed (since some don't even occur); we need to know what is reacting to make what. Thus, we use the arrow, or yields symbol to denote this.

The substances to the left of the sign are the reactants, the ones that are reacting, and the ones on the right are the products, the ones that are being produced from the reactants. The arrow is an excellent way to represent the direction the reaction occurs in as the way it's written clearly demonstrates direction.

Hope this helps!