Match each term to its description. (3 points)
Excess reactant
Theoretical Yield
Limiting Reactant

1. Reactant that can produce more of
the product

2. Reactant that can produce a lesser
amount of the product

3. Amount of product predicted to be
produced by the given reactants

The value of x = 97

The unknown angles : 97°,97°, 107° and 59°

One variable linear equation is an equation that has a variable and the exponent number is one.  

Can be stated in the form:  

\(\large{\boxed{\bold{ax=b}}\)

or  

ax + b = c, where a, b, and c are constants, x is a variable  

The parallelogram has total angle of 360°.

The value of each of the 4 angles of the parallelogram :

1. x°

2. x°

3. x+10°

4. 59°

The sum of the four angles of this parallelogram is :

\(\tt x+x+x+10+59=360\)

So that the mathematical equation becomes (by combining the like terms) :

\(\tt 3x+69=360\\\\3x=291\\\\x=97\)

So the value of the four angles (by entering the x value)

1. 97°

2. 97°

3. x+10=97+10=107°

4. 59°

Answer:

6 mol CO2

Explanation:

According to the equation, 6 moles of O2 will produce 6 moles of CO2, so the ratio is 1:1

therefore 6 moles of O2 will produce 6 moles of CO2

Answer:

One thing that can be done to particles in a chemical reaction to increase the rate of reaction is to increase the surface area of the reactants. Increasing the surface area of a reactant increases the number of collisions between particles, which increases the chance of a successful reaction. This can be achieved through grinding, crushing, or breaking the reactants into smaller particles.

ANSWER

that atoms contained mobile particles with a negative (-) charge

EXPLANATION

J. J Thompson is one of the few scientists that worked on the atomic structure. He discovered electron in 1897 when he performed cathode ray experiment. During his experiment, he discovered that most of the rays passed through the tube and few of the rays were deflected.

Recall, that like charges repel and unlike charges attract. He used that simple principle to identify that most of the rays are negatively charged while few of the rays are positively charged because they were deflected

He concluded that atoms contained mobile particles with a negative (-) charge and he named it electron.

Therefore, option D is the correct answer

Chemical processes referred to as endothermic reactions occur when the reactants take in heat energy from their environment to create products.

Endothermic reactions quickly and efficiently take up heat-based energy from their surroundings. In contrast, an exothermic process transfers energy into the system's surroundings. A common illustration of an endothermic chemical reaction is photosynthesis.

Chemists refer to the process of boiling water as being endothermic since heat must be added. It follows that since certain processes need heat, others must also produce heat as they operate. They are referred to as exothermic.

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Molecular substances tend to be gases because the intermolecular forces of attraction are comparatively weak. You don't have to break any covalent bonds in order to melt or boil a molecular substance.

The longest intermolecular separation and hence the strongest intermolecular pressure of attraction can be found in the gaseous state of matter.

Although solids' intermolecular interactions were sufficient to maintain themselves in locked places, gases often have weak intermolecular forces that cause them to remain considerably separated. The gases possess greater intermolecular space than solids as a result of these weak forces.

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Answer:

About redox reaction which of the given statements are true?

Explanation:

Redox reaction is the one in which both oxidation and reduction reactions take place simultaneously.

For example:

\(C(s)+O_2(g)->CO_2(g)\)

In this reaction, carbon undergoes oxidation and oxygen undergoes reduction simultaneously.

During this reaction, mutual exchange of electrosn take place between the oxidant and the reductant.

Among the given options,

Option B. electrons are transferred

and

option C.They include both oxidation and reduction takes place are the correct answers.

The maximum mass of sodium bromide that could be produced by the chemical reaction is 38.59 g.

The balanced chemical equation for the reaction between hydrobromic acid and sodium hydroxide is:

HBr (aq) + NaOH (s) → NaBr (aq) + H2O (l)

To determine the maximum mass of sodium bromide that could be produced, we need to first identify the limiting reactant. We can do this by calculating the number of moles of each reactant using their molar masses:

Molar mass of HBr = 80.91 g/mol

Molar mass of NaOH = 40.00 g/mol

Number of moles of HBr = 55.8 g ÷ 80.91 g/mol = 0.689 mol

Number of moles of NaOH = 15.0 g ÷ 40.00 g/mol = 0.375 mol

The stoichiometry of the balanced chemical equation tells us that one mole of HBr reacts with one mole of NaOH to produce one mole of NaBr. Therefore, the limiting reactant is NaOH, since it produces fewer moles of product (NaBr) than HBr.

The number of moles of NaBr produced from the reaction is equal to the number of moles of NaOH used, which is 0.375 mol.

Finally, we can calculate the maximum mass of NaBr that could be produced using its molar mass:

Molar mass of NaBr = 102.89 g/mol

Mass of NaBr = number of moles of NaBr × molar mass of NaBr

Mass of NaBr = 0.375 mol × 102.89 g/mol = 38.59 g

Therefore, the maximum mass of sodium bromide that could be produced by the chemical reaction is 38.59 g.

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1. Earthquakes and Eruptions (volcanoes)

2. Divergent plate boundary

3. Apart from a widening valley, it equally contributes to steep mountain sides spreading. A mid-oceanic ridge is naturally produced if two oceanic plates naturally start moving away from each other.

1. When a divergent boundary occurs beneath oceanic lithosphere, the rising convection current below lifts the lithosphere, producing a mid-ocean ridge. Extensional forces stretch the lithosphere and produce a deep fissure. When the fissure opens, pressure is reduced on the super-heated mantle material below. It responds by melting, and the new magma flows into the fissure. The magma then solidifies and the process repeats itself.

2. When two plate diverge from each other also known as divergent (di-apart, vergere- to inclined) plate margin .

Two plate diverge along oceanic ridges where new lithosphere is created.

Now come to the main point: Geological Features

When two oceanic plate diverge then new sea floor is created by a process called sea floor spreading and features like Mid oceanic ridges, volcanoes & Young lava flows forms. Ex. East Pacific Rise, Mid-Adlantic Ridge.

When two continental plates diverge by continental rifting then features like Rift valley, volcanoes are found. Ex of continent continent -East Africa rift vally, Red sea.

3. The major difference between different types is what type of plate the divergent boundary is between. If the boundary is found between two continental plates you are left with a rift valley. ... If two oceanic plates begin moving away from each other it creates a mid-oceanic ridge.

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Answer:

Lower Heart Rate

Athletes' heart rates tend to be lower than heart rates of non-athletes. A low resting heart rate is generally a sign of good cardiovascular fitness and efficiency. A well-trained athlete may have a normal resting heart rate of only 40 beats per minute, compared with the average heart rate that ranges from 60 to 100 beats a minute.

Lower Disease Risk

Athletic types may have better overall health and be less apt to develop certain diseases. Regular exercise boosts your immune system and lowers the risk of serious health conditions such as cancer and heart disease. Physical activity can also reduce the risk of type 2 diabetes and osteoporosis while helping to manage cholesterol levels and blood pressure. You gain about two hours of additional life expectancy for each hour of regular exercise, according to the American Heart Association.

Psychological Effects

Athletes may have better mental clarity and focus than non-athletes. Exercise increases the flow of oxygen, which has a direct impact on brain function, explains the American Heart Association. Exercise can help improve your memory and reduce negative feelings, such as anger, tension, anxiety and depression.

A comprehensive study of the academic performance of North Carolina high school student-athletes in North Carolina over a three-year period attests to the positive psychological effects of athletic capabilities. Researchers discovered obvious differences between athletes and non-athletes. The study of nearly 127,000 high school students found dropout rates were lower and grade point averages were higher in students who participated in sports. The study was led by Dr. Roger Whitley in collaboration with the North Carolina High School Athletic Association.

Motivated by Excellence

Athletes, especially competitive athletes, have high ambitions. It's a trait that allows them to persevere through setbacks and failures and to come out the other side stronger. Athletes are highly motivated individuals who set their sights on a prize and are single-minded in their pursuit of excellence. They are propelled by passion to become the best they can be and the benefits of that inner drive are a higher level of self-esteem and confidence.

Explanation:

Answer: Final temperature for given mass of water is \(24.6^o C\).

Explanation:

Given: mass = 630.1 g, specific heat = 418 \(J/g^{o} C\), q = 950 J, T = \(24.2^o C\)

Formula used:  \(q = mC \Delta T\)

where, q = heat energy

            m = mass

            C = specific heat

            \(\Delta T\) = change in temperature = \((T_2 - T_1)\)

  950 J = \(630.1 g \times 4.18 J/g^o C \times (T_2 - 24.2^o)\)

          \(T_2 = 24.6^o C\)

Answer:

T2 = 24.56°C

Explanation:

Given data:

Mass of water = 630.1 g

Specific heat of water = 4.18 J/g.°C

Initial temperature = 24.2°C

Heat absorbed = 950 J

Final temperature = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

by putting values

950 J = 630.1 g × 4.18 J/g.°C ×  (T2 - 24.2°C)

950 J = 2633.82 j/°C ×  (T2 - 24.2°C)

950 J / 2633.82 j/°C =  (T2 - 24.2°C)

0.36°C  + 24.2°C = T2

T2 = 24.56°C

The original volume of the concentrated solution was 182.7 mL.

To solve this problem, we can use the formula for dilution:

C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

We are given that the initial concentration (C1) is 2.3 M, the final concentration (C2) is 2.1 M, and the final volume (V2) is 191.8 mL. We want to find the initial volume (V1).

Plugging in the values we know into the dilution formula, we get:

(2.3 M) V1 = (2.1 M) (191.8 mL)

Simplifying this expression, we can solve for V1:

V1 = (2.1 M) (191.8 mL) / (2.3 M)

V1 = 182.7 mL

It's important to note that the units of concentration and volume must be consistent in this formula. In this case, the concentrations are given in units of M (moles per liter), and the volumes are given in units of mL (milliliters).

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Answer:

see explaination

Explanation:

Case 1) When we consider vapor pressure of H2O;

Let the pressure is 1 atm OR 760 torr.

As H2 is collected over water, we have to consider the vapor pressure of H2O as well.

Using data i.e. vapor pressure of H2O at 40° C = 55.365 torr

So, pressure of H2 = P = 760 - 55.365 = 704.635 torr = 704.635/760 = 0.9272 atm

Volume of H2 = 80 ml = 0.08 liter

Temperature (T) = 40 + 273 = 313 K

Gas constant (R) = 0.0821 L atm/mol K

Let n is moles of H2. Applying ideal gas equation;

PV = nRT

n = PV/RT = 0.9272 * 0.08 / 0.0821 * 313

n = 0.00289 moles

Mass of H2 = moles * molar mass = 0.00289 * 2.016 = 0.00582 grams

OR 5.8*10^-3 grams ...Answer

----> Case 2) When we don't consider vapor pressure;

Pressure of H2 = 1 atm, all other parameters will remain same as in case 1.

So, mass of H2 = 6.3*10^-3 grams

But Case 1) is correct approach as in question it is mentioned that H2 is collected over water.

To determine the tomato's velocity when it hits the ground, we need more information. Specifically, we need the height from which the tomato was dropped and the tomato mass.

Without these details, it is impossible to calculate velocity accurately. The velocity of an object when it hits the ground depends on factors such as the height of the fall, the mass of the object, and any forces acting on it during the fall (such as air resistance).

If you can provide the necessary information, I can help you calculate the velocity of the tomato when it hits the ground.

Answer:

accounts for many of the physical properties of metals, such as conductivity and malleability.

Explanation:

hope this helps

The equation of the combination of the cesium chloride and the calcium is shown in the image attached.

We know that when we write the reaction equation, we are trying to show on a piece paper what is going on in the reaction system. In this case, we are going to have that there is in the system, the combination of molten cesium chloride and molten calcium metal.

In a reaction, we would have to ensure that the reaction equation is balanced. The implication of this is that the number of the atoms of each of the elements on both sides of the reaction equation must be the same.

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The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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Answer:

A) The bonds of the reactants must be broken

D) The bonds of the products must  be formed

E) Breaking bonds require an input of energy

H) Forming bonds releases energy

These are all the 4 correct statements

Explanation:

Breaking bonds is an ENDOTHERMIC process, meaning that it takes in energy to break the bonds of the reactants.

Forming bonds is an EXOTHERMIC process, meaning that it takes in energy to break the bonds of the reactants.

The aqueous solution and their respective properties include the following:

This is defined as the degree of acidity or alkalinity of a substance and pH from 1.0 - 6.9 is acidic, 7 is neutral while 7.1 - 14.0 is basic.

The aqueous solutions and their appropriate pH can be seen above which is the right choice.

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Answer:

A small amount of chemical splashes in Frank's eye. What should happen next? Frank should go to the eyewash station while his lab partner tells the teacher what happened.

Explanation:

Brainlist

The second-law efficiency of this freezer is 94.7%.

The second-law efficiency of a refrigerator or freezer is described as as the ratio of the desired cooling effect  which is the heat removed from the cold reservoir) to the energy input required to achieve this cooling effect.

The second-law efficiency of a refrigerator  formula is

η = Qc / W

we have the equation as

Qh = mCΔT = Qc

Tc = -7°C = 266 K

Th = 25°C = 298 K  and

W = Qh / (1 - Tc/Th) = Qc / (1 - Tc/Th) = 3.3 W

we have found  Qc = 3.125

W  = 3.3 W

we then substitute into the  second-law efficiency formula:

η = Qc / Wmin

η= 3.125 W / 3.3 W

η= 0.947 or 94.7%

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Answer:

An atomic number of 94

Explanation:

Just took the practice

Answer:

You didn't show which element it is. The proton is the atomic number, the electron is the same number of protons, and the neutron is the atomic mass rounded to the nearest whole number minus the proton.

Explanation:

For the pair of compounds CH3OH and H2CO, the one with the higher vapor pressure at a given temperature is CH3OH.A substance's propensity to transform into a gas.

at a specific temperature is measured by a substance's vapor pressure. The likelihood of a material being in the gaseous form at a given temperature increases with increasing vapor pressure.More volatile than H2CO is the molecule CH3OH. A hydroxyl (-OH) group, a polar group, is bonded to the carbon atom in CH3OH, a primary alcohol. Due to greater intermolecular interactions, such as hydrogen bonding, made possible by CH3OH's polarity, such as higher boiling points and lower vapor pressures.At normal temperature, formaldehyde, commonly known as H2CO, exists as a gas with a greater vapor pressure than CH3OH.Remember that vapor pressure is a function of temperature.

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