SKILL: MAKING VALID GENERALIZATIONS Use the paragraph below to answer the following questions. The Chinese people also call the Huang River “China’s Sorrow.” The river was unpredictable and sometimes dangerous. It brought life to the land. But it also frequently took life away. Destructive floods could come without warning, sometimes as often as every two years. Sometimes a flood drowned thousands of people. At times, the river flooded with such force that the water cut an entirely new path over the land. The course of the river could change by hundreds of miles. What is a generalization you can make about the Huang River?

Answer:

P₂ = 607 mmHg

Explanation:

Given data:

Initial volume = 4.5 L

Final volume = 5.6 L

Initial pressure = 756 mmHg

Final pressure = ?

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

756 mmHg × 4.5 L = P₂ × 5.6 L

P₂ = 3402 mmHg. L/5.6 L

P₂ = 607 mmHg

Answer:

metallic bond

because this diagram is electron gas theory which shows metallic bond

Answer:

Here are some adjectives for ice: para-elemental, kinder thin, thick continental, invisibly transparent, dirty, rock-hard, immense and almost innumerable, thin, flawless, horizontal and pelting, nearly horizontal and pelting, more pelting, beautifully numbing, pure compact, new catastrophic, dirty brash, largely foamy, ...

Explanation:

Answer:

The Universe is constantly expanding and as it expands the stars and objects in space move farther apart, just like the points on the balloon when air is blown into it. Density and distribution of "stars" as the balloon expands because when volume increases the density will increase.

Hope this Helps

Spectrographs are useful to astronomers as they  help in studying the composition of a star as each component absorbs light at specific wavelengths.

It is defined as a graph which depicts the spectral information about the component. Spectrographs consisting of lines  are  called atomic spectra as the lines represent wavelengths which are radiated from atoms when electrons jump or make a transition from one energy level to another.

Band spectra is given to a group of lines spectrum which are so close that they appear like a band . They are produced by molecules when they radiate their vibrational or rotational energies.

Amount of light which is absorbed is unique for each element and hence astronomers can measure  the position of lines  to determine which elements are present in the target.

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Answer:

The answer is

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

404.6 kPa = 404600 Pa

From the question we have

[tex]P_2 = \frac{404600 \times 12}{43} = \frac{4855200}{43} \\ = 112911.6279... \\ = 112912[/tex]

We have the final answer as

Hope this helps you

Answer:

1 a

Explanation:

Mass of Cyclohexen : 10.2 g

Reaction

3 C6H10 + 4 Na2Cr2O7 + 16 H2SO4 >

3 C6H10O4 + 4 Cr2(SO4)3 + 4Na2SO4 + 16 H2O

mol C6H10 : mol C6H10O4 = 3 : 3 = 1 : 1

[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\68.6\%=\dfrac{12.5}{theoretical}\times 100\%\\\\theoretical=18.22~g[/tex]

12.5 grams of C6H10O4 , mol C6H10O4 (MW 146.14 g/mol):

[tex]\tt \dfrac{18.22}{148}=0.123[/tex]

mol C6H10 = mol C6H10O4 = 0.124

mass C6H10 :

[tex]\tt 0.124\times 82.16=10.2~g[/tex]

Answer:

96.72 m/min

Explanation:

The following data were obtained from the question:

Time (t) = 56.7 s

Distance (d) = 100 yard

Rate (R) =?

Next, we shall convert 56.7 s to minutes. This can be obtained as follow:

60 s = 1 min

Therefore,

56.7 s = 56.7 s × 1 min /60 s

56.7 s = 0.945 min

Next, we shall convert 100 yard to metre (m). This can be obtained as follow:

1 yard = 0.914 m

Therefore,

100 yard = 100 yard × 0.914 m /1 yard

100 yard = 91.4 m

Finally, we shall determine the rate of the swimmer as follow:

Time (t) = 0.945 min

Distance (d) = 91.4 m

Rate (R) =?

R = d/t

R = 91.4/0.945

R = 96.72 m/min

Thus the rate of the swimmer is 96.72 m/min

Solution properties are the properties of a solution that don't depend on the type of solute but only on the concentration of the solute.  

Solutions from volatile substances have a higher boiling point and lower freezing points than the solvent  

For freezing point can be formulated

[tex]\tt \Delta T_f=K_f.m[/tex]  

K = molal freezing point constant  

m = molal solution  

A solution with a freezing point of -5.8 ∘C

[tex]\tt \Delta T_f=T_f~solvent-T_f~solution=0-(-5.8)=5.8[/tex]

[tex]\tt mass~of~glucose:\\\\\Delta T_f=K_f.m\\\\5.8=1.86^oC/m.\times \dfrac{mol~glucose}{12}\\\\mol~glucose=\dfrac{5.8\times 12}{1.86}=37.42[/tex]

[tex]\tt mass=mol\times MW=37.42\times 180=6735.6~g=6.7356~kg[/tex]

Answer:

These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. Different isotopes of the same element have different masses. Mass is the word for how much substance (or matter) something has.

Answer:

the second one

Explanation:because its higher

Answer:

CH3CH2CH2Ch2Ch2Ch3

Explanation:

That's the answer

Answer:

Where are what located no picks no pdf so what?

Number of atoms in 1.4 mol of Phosphorus trifluoride (PF₃) : 8.428 x 10²³

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

1.4 mol of Phosphorus trifluoride (PF₃), number of atoms :

[tex]\tt N=1.4\times 6.02\times 10^{23}\\\\N=8.428\times 10^{23}[/tex]

Answer: The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the Lithosphere . The layer below the rigid lithosphere is a zone of asphalt-like consistancy called the Asthenosphere . The asthenosphere is the part of the mantle that flows and moves the plates of the Earth.

Explanation:

Answer:

Ksp = 3.24 x 10⁻⁴

Explanation:

The dissociation equilibrium for a generic salt AB is:

AB(s) ⇄ A⁺(aq) + B⁻(aq)

              s            s

For instance, the expression for the Ksp constant is:

Ksp = [A⁺] [B⁻] = s x s = s²

According to the problem, 0.0180 mol of the salt is soluble in 1.00 L os water. That means that the solubility of the salt (s) is equal to 0.0180 mol per liter.

s = moles of solute/L of solution = 0.0180 mol/L

Thus, we calculate Ksp from the s value as follows:

Ksp = s² = (0.0180)² = 3.24 x 10⁻⁴

Answer:

The chemical formula is NaClO and consists of one atom of sodium (Na), one atom of chlorine (Cl) and one atom of oxygen (O).

Molecular Weight/ Molar Mass: 74.44 g/mol

Density: 1.11 g/cm³

Explanation:

Answer:

Because only regular-shaped objects have a consistent length, width, height, and shape.

Explanation:

Because only regular-shaped objects have a consistent length, width, height, and shape. When dealing with an object composed of differing shapes, your must calculate each portion separately and then add them.

Answer:

a. 167 mL.

b. 39.3 %.

Explanation:

Hello!

In this case, for the undergoing chemical reaction, since 45.0 g of aluminum react, based on the 2:3 mole ratio with sulfuric acid, we can compute the required moles  as shown below:

[tex]n_{H_2SO_4}=45.0gAl*\frac{1molAl}{27.0gAl} *\frac{3molH_2SO_4}{2molAl} =2.50molH_2SO_4[/tex]

Next, since the molarity of a solution is computed based on the moles and volume (M=n/V), we can compute the required volume of sulfuric acid as shown below:

[tex]V=\frac{n}{M}=\frac{2.50mol}{15.0mol/L}=0.167L[/tex]

That in mL is 167 mL.

Moreover, for the percent yield, we compute the grams of aluminum sulfate that are produced based on the required 2.50 moles of sulfuric acid:

[tex]m_{Al_2(SO_4)_3}=2.50molH_2SO_4*\frac{1molAl_2(SO_4)_3}{3molH_2SO_4}*\frac{342.15gAl_2(SO_4)_3}{1molAl_2(SO_4)_3} \\\\m_{Al_2(SO_4)_3}=285.13gAl_2(SO_4)_3[/tex]

Therefore the percent yield is:

[tex]Y=\frac{112g}{285.13g}*100\%\\\\Y=39.3\%[/tex]

Best regards!

Answer:

Crystalline solids have well-defined edges and faces, diffract x-rays, and tend to have sharp melting points. In contrast, amorphous solids have irregular or curved surfaces, do not give well-resolved x-ray diffraction patterns, and melt over a wide range of temperatures.

Explanation:

Hope this helped!

Answer:

answer is c

Explanation: cause there breaking it

Answer:

A chemical reaction is the process in which atoms present in the starting substances rearrange to give new chemical combinations present in the substances formed by the reaction. These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.

A definition is an explanation of a word or a term for clarity.

The term definition has to do with the correct explanation of a term or word.

The following are the appropriate definitions of the words;

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1. Heretic: A heretic is a person who disagrees with an accepted belief. For example, during the Middle Ages, individuals who questioned or challenged the teachings of the Catholic Church were often labeled as heretics.

2. Influence: Influence refers to the ability to have an effect on someone or something. It can be the power to shape someone's opinions, decisions, or behavior. For instance, parents, teachers, and friends can have a significant influence on a person's choices and actions.

3. Technology: Technology refers to the practical application of knowledge, tools, and crafts. It involves using scientific and engineering principles to create new devices, processes, or systems that enhance human life. Examples of technology include smartphones, computers, and medical equipment.

4. Skepticism: Skepticism is an attitude of doubt or a belief that knowledge is not certain. Skeptics question claims, ideas, or beliefs and seek evidence or logical reasoning to support them. For instance, a person who is skeptical of conspiracy theories would ask for concrete evidence before accepting such claims as true.

5. Habit: A habit is a usual behavior, attitude, or quality that is acquired through repetition and becomes automatic. It is often formed by consistently performing a specific action. For example, brushing teeth before bed can become a habit through repetition and eventually be done without conscious thought.

Sorry that was a lot to read (lol)

Answer:

0.00883 mol

Explanation:

Let's consider the reduction reaction of gallium.

Ga³⁺(aq) + 3 e⁻ ⇒ Ga(s)

We can establish the following relationships:

The amount of Ga deposited using a current of 0.710 A that flows for 60.0 min is:

[tex]60.0min \times \frac{60s}{1min} \times \frac{0.710C}{s} \times \frac{1mole^{-} }{96486C} \times \frac{1molGa}{3mole^{-}} = 0.00883 molGa[/tex]

Answer:

The number becomes smaller

Explanation:

Volume = 5800mL

To be converted to L

The relationship between mL and Liters is given as;

1 L = 1000 mL

This means that;

1 L = 1000 mL

x L = 5800 mL

x = 5800 / 1000 = 5.8 L

Comparing 5.8 with 5800, the number becomes smaller.

Answer    1 mole = 6.02 × 1023 atoms

0.25 moles × (6.02 × 1023) = 1.5 × 1023 atoms Carbon

for the first one

Answer:

2 mol H₂O

Explanation:

With the reaction,

1.55 moles of O₂ would react completely with ( 2*1.55 ) 3.1 moles of H₂. There are not as many moles of H₂, thus H₂ is the limiting reactant.

Now we calculate the moles of H₂O produced, starting from the moles of limiting reactant:

The number of moles of H₂O that could be produced in the reaction is 2.00 moles

From the question,

We are to determine the number of moles of H₂O that could be produced.

The given balanced chemical equation is

2 H₂(g) + O₂(g) → 2 H₂O(g)

This means,

2 moles of H₂(g) reacts with 1 mole of O₂(g) to produce 2 moles of H₂O

From the given information

Number of moles of H₂ present = 2.00 moles

and

Number of moles of O₂ present = 1.55 moles

Since,

2 moles of H₂(g) reacts with 1 mole of O₂(g) to produce 2 moles of H₂O

Then,

The 2.00 moles of H₂(g) will react with 1.00 mole of O₂(g) to produce 2.00 moles of H₂O

∴ 2.00 moles of H₂O will be produced during the reaction

(NOTE: Only 1.00 mole of the O₂(g) will react, meaning O₂(g) is the excess reactant)

Hence, the number of moles of H₂O that could be produced in the reaction is 2.00 moles

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