100 points please help me will also mark brainliest!

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question

mass = 324 g

volume = 40.8 cm³

We have

\(density = \frac{324}{40.8} \\ = 7.941176...\)

We have the final answer as

Hope this helps you

Answer:

Explanation:                                                                                        

The warm water provides moisture for hurricanes so that hurricanes are strongest over water, and become weak when they reach land.

Hurricanes are forceful winds in the air which are able to destroy even a land completely. One of the most destructive forces on earth is the hurricane. Although the process of a origin of  hurricane is complex.

They need water that is at least 80 degrees first. Air that is wet is the second component. Finally, for a hurricane to form, there must be convergent winds.

A group of thunderstorms moving across the ocean's surface signal the start of the real process. Similar to how a straw absorbs liquid, when the surface water is heated, the storm absorbs heat energy from the water. The air becomes moistened as a result.

The storm can develop into a hurricane if the wind conditions are right. The fuel is this thermal energy. Hence, option c is correct.

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Time taken to deposit 15.0 g copper metal at the cathode of an electrolysis cell running with a current of 150 ma is option A. 84.4 hr

Electrolysis is a technique that uses direct electric cutting-edge to force an in any other case non-spontaneous chemical response. Electrolysis is commercially critical as a level in the separation of elements from obviously occurring assets which includes ores the usage of an electrolytic cell.

Calculation:-

m = MIt/nF

15 = 63.55 × 150 × 10⁻³ × t/2× 96500

t = 2895000/9.5325 sec

t = 303697.88 sec

 = 303697.88/ 3600 hr

 = 84.4 hr

Electrolysis is the process of using electricity to split water into hydrogen and oxygen. This response takes place in a unit referred to as an electrolyzer.

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The substance with the highest melting point among the given choices should be CO.

The melting point of a substance depends on its intermolecular forces, which are the forces that hold its molecules together. Generally, the stronger the intermolecular forces, the higher the melting point of the substance.

Among the given choices, CO has both London dispersion forces and dipole-dipole interactions, while Ne, N2, and Xe only have London dispersion forces. Dipole-dipole interactions are generally stronger than London dispersion forces.

Therefore, CO should have the highest melting point among the given substances because it has stronger intermolecular forces than the other covalent molecules.

In summary, the substance with the highest melting point among the given choices should be CO.

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Answer:

If there is a change in the natural shape of the intestines, this can be known as a twisted bowel. A twist in the small intestine is referred to as a volvulus. Twists in the large intestine are known as a colonic volvulus. These abnormal twists or loops can cause an obstruction or other medical conditions which could be fatal. If signs of twisting bowel present, it is important to seek medical attention as quickly as possible.

The boiling point of the solution will increase and the freezing point will decrease when diluted with an additional 100 grams of water.

When a solute is dissolved in a solvent, it affects the boiling and freezing points of the solution. Adding 100 grams of water to the solution dilutes it, meaning the concentration of the solute decreases. Dilution generally results in an increase in boiling point and a decrease in freezing point.

The boiling point elevation occurs because the presence of the solute particles disrupts the formation of vapor bubbles during boiling. By diluting the solution, the concentration of the solute decreases, leading to a decrease in the disruption of vapor bubble formation and thus an increase in boiling point.

Similarly, the freezing point depression occurs because the solute particles interfere with the formation of the solid lattice during freezing. By diluting the solution, the concentration of the solute decreases, reducing the interference and resulting in a decrease in the freezing point.

Therefore, when the solution is diluted with an additional 100 grams of water, the boiling point will increase, and the freezing point will decrease.

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Answer:

Activation energy is the minimum amount of energy required for a chemical reaction to occur. It acts as a barrier that must be overcome for reactant molecules to transform into products. In other words, it is the energy input necessary to break the bonds of the reactant molecules and initiate the reaction.

The role of activation energy is crucial in determining the rate of a chemical reaction. Reactions with lower activation energy proceed more quickly because a higher proportion of reactant molecules have sufficient energy to overcome the activation barrier. On the other hand, reactions with higher activation energy have a slower rate since only a small fraction of reactant molecules possess the required energy.

An example of activation energy can be seen in the combustion of methane (CH4) in the presence of oxygen (O2) to form carbon dioxide (CO2) and water (H2O). This reaction requires an ignition source, such as a spark or flame, to supply the activation energy. Once the initial activation energy is provided, the reaction proceeds exothermically, releasing energy in the form of heat and light.

Without the activation energy, the reactant molecules would remain stable and the reaction would not occur spontaneously. Activation energy ensures that reactions proceed at appropriate rates and provides a control mechanism for chemical transformations.

The balanced equation for the combination reaction described, using the smallest possible integer coefficients, when hydrogen combines with ethylene (C₂H₄) to form ethane (C₂H₆) is 2H₂ + C₂H₄ → C₂H₆.

A balanced equation is a chemical reaction in which the numbers of atoms for each element in the reaction and the total charge are conserved. In other words, the mass and the charge are balanced on both the reactant and product side of the reaction.Therefore, to balance the equation, we should ensure that the number of atoms of the element on the reactant side is equal to the number of atoms of the same element on the product side.

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two negative charges because electrons have a negative charge

A substance's form or appearance can be changed physically without affecting its chemical makeup.

Cutting fruits and vegetables, melting chocolate, and boiling eggs are examples of foods that go through physical changes.

For instance, slicing fruits and vegetables alter their size and shape, but not their chemical makeup.

Similar to melting chocolate, which transforms it from a solid to a liquid yet keeps its chemical makeup the same.

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The total interest that Taneka will pay over the five years, given the cost of the house, is $ 62, 691. 68

First, find the amount that she borrowed to buy the house to be:

= Cost of house x ( 1 - down payment percentage )

= 219, 900 x ( 1 - 5 %)

= $208,905

Then find the monthly payment that she made on the loan :
= 208,905 x (  0.00575 ( 1  + 0. 00575 )^ 240 ) / ( ( 1 + 0. 00575 ) ^ 240 - 1 )

= $1,583.81

Then, we can find the monthly interest to be:

= (Total monthly payment x number of months x number of years) - ( principal payment)

= (1, 583. 81 x 12 x 5 ) - 32, 336.92

= $ 62, 691. 68

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The partial pressure is Pn = 4 * 10⁻²¹.

Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.

logKp=-43. 10

The partial pressure of N2 at 1000 K is (PN2) =200 atm,

The partial pressure of N is = (Pn)

(PH2) =600 atm,

logKp=-17. 30

The reaction for the dissociation of nitrogen molecule into its element is given below:

N₂(g) ⇔ 2N(g)

The expression of equilibrium constant (KP) is,

Kp = P²n/P¹n2   ......(i)

When,

log Kp = -43.10

Kp = 10⁻⁴³°¹⁰

= 7.9 * 10⁻⁴⁴

The partial pressure of N2 at 1000 K is 200 atm,

Pn2 =200 atm,

Put value in equation (i),

7.9 * 10⁻⁴⁴ = Pn2/200atm

Pn2 = 200atm * 7.9 * 10⁻⁴⁴

Pn = 4 * 10⁻²¹

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The secretion of acids, buffers, enzymes, and water aids in the breakdown of food.

The food moves through the gastrointestinal tract and breaks down into smaller particles for energy, cell repair, and growth.

Digestion begins when eating and chewing food with the help of teeth in the mouth, then it goes down to the small intestine.

While moving through the gastrointestinal tract it mixes with juices, buffers, acids, enzymes, and water which disintegrates the large molecules of food into smaller ones and makes it suitable for assimilation and absorption in the body.

To put it simply, the secretion of acids and acidic juices is responsible for food digestion.

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In the event that a thermometer breaks, the most important action to take is to pick up the broken glass and dispose of it properly.

You should also clean the area to ensure that there are no remaining pieces of glass. Additionally, it is important to tell the teacher about the accident right away and not try to save the red alcohol or pay for a replacement thermometer, as this is not necessary.

Calling 911 is not necessary, unless someone is injured by the broken thermometer. When cleaning up a mercury spill, it is important to use caution and protective gear, such as gloves, goggles, and a face mask, to reduce the risk of exposure to mercury vapors. You should also make sure to keep any children and pets away from the spill area.

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Answer:

Bundling up, starting a fire, body warmth, blankets, taking a hot shower/bath.

When a liquid is heated, its particles gain energy and travel quicker; when it is chilled, the particles slow down and become closer together.

A particle (or corpuscule in older literature) is a tiny localized entity in the physical sciences that can be characterized by several physical or chemical characteristics such as volume, density, or mass.

They range in size and number from subatomic particles such as electrons to minuscule particles such as atoms and molecules to large particles such as powders and other granular materials. Particles can also be used to construct scientific models of bigger objects, such as people moving in a throng or celestial entities in motion, based on their density.

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In some instances, the concentration of a solution is expressed as molality instead of molarity because molality is a more accurate measure of the concentration of a solution when the temperature changes.

Molarity is defined as the number of moles of solute per liter of solution, whereas molality is defined as the number of moles of solute per kilogram of solvent.

Because the volume of a solution can change with temperature due to thermal expansion, the concentration of a solution expressed in terms of molarity may change with temperature.

Therefore, molality is a more accurate measure of the concentration of a solution in situations where temperature changes can affect the volume of a solution.

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The one which is not necessary for the filtration is thermometer. The correct option is A.

The filtration, the process in which the solid particles present in the liquid or the gaseous fluid will be removed by the use of the filter medium which will the permits and the fluid to pass the through it but it will be retains the solid particles.

The most common example of the filtration is the making tea. When we are preparing the tea, the filter or the sieve which is used when we separate the tea leaves from the water and through the sieve pores, the water will be pass. The correct option is A.

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Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

From the question

mass of liquid = 3.75 g

volume = 3.8 mL

Substitute the values into the above formula and solve for the density

The density is

\(density = \frac{3.75}{3.8} \\ = 0.98684210...\)

We have the final answer as

Hope this helps you

When antacid reacts with HCl to produce H2CO3 it produce fizzy gas react due to a double displacement reaction.

Table salt and carbonic acid are produced in a two fold displacement process when hydrochloric acid and antacid are combined. Additionally, due to the instability of carbonic acid, it will decompose into water and carbon dioxide, emitting a "fizzy" gas.

Strong acid hydrochloric acid is denoted by the chemical formula HCl. The primary ingredient in antacids is sodium bicarbonate, sometimes known as baking soda and has the chemical formula NaHCO3.

Antacid undergoes a chemical reaction when it reacts as a carbonate with powerful acids like hydrochloric acid to create compounds with a different chemical makeup from the beginning components. Similar reactions will be produced by other carbonates, such as calcium carbonate, which makes up the majority of Tums.

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Answer:

5 atoms are in each molecule of calcium carbonate

Answer:

Magnets are used to make a tight seal on the doors to refrigerators and freezers. They power speakers in stereos, earphones, and televisions. Magnets are used to store data in computers, and are important in scanning machines called MRIs (magnetic resonance imagers), which doctors use to look inside people's bodies.

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Answer:

The last digit is estimated

Explanation:

the last digit of any measurement is estimated, and it is this estimated digit that reflects uncertainty. The more decimal places there are the less uncertainty there is.

The number of significant figures is uncertain in a number that ends with a zero to the left of the decimal point location. The zeros in the measurement 1,300 grams could be significant or they could simply indicate where the decimal point is located.

According to the concept of significant figures, the last digit is uncertain digit in a measurement.

Significant figures are used for establishment  of a number which is presented in the form of digits. These digits give a meaningful representation  to the numbers.

The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:

1)All non-zero digits are significant .

2)All zeroes which occur between non-zero digits are significant.

3)All zeroes to the left and right of  a non-zero digit are not significant.

4) All zeroes on right  of decimal are significant if a non-zero number follows them.

5)All zeroes on right side of non-zero digit are significant.

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Answer:

I'd say "a" because not everything with plants and animals is perfectly organized together nothing ever is.

ClO\(_2\), H\(_2\)O are the polar covalent compounds, since all of these chemicals have a dipole moment.

Polar covalent compounds are electrical conductors. Polar compounds comprise chemical compounds held together through polar covalent bonds.

A polar compound is a chemical species that has two or even more atoms that are linked together by polar covalent bonds that share electrons irregularly. ClO\(_2\), H\(_2\)O are the polar covalent compounds, since all of these chemicals have a dipole moment.

Therefore,  ClO\(_2\), H\(_2\)O are the polar covalent compounds.

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Answer:

Molar mass of the unknown gas is 8.96g/mol

Explanation:

Hello,

According to Graham's law of diffusion, its states that the rate of diffusion of a gas is inversely proportional to the square root of its molecular mass

R = k (1/√(M))

R = rate of diffusion

M = molecular mass

R₁ / R₂ = √(M₂ / M₁)

R₁ = nitrogen = 68.3s

R₂ = unknown gas = 85.6s

M₂ = molecular mass of the unknown gas

M₁ = molecular mass of nitrogen = 14g/mol

68.3 / 85.6 = (√M₂ / 14)

0.8 = (√M₂ / 14)

Take square of both sides

0.8² = M₂ / 14

M₂ = 14 × 0.64

M₂ = 8.96g/mol

The molar mass of the unknown gas is 8.96g/mol

In chemistry, pressure refers to the force per unit area exerted by gas molecules on the walls of the container in which they are enclosed. It is often measured in units of pascals, atmospheres, millimeters of mercury, or pounds per square inch. Pressure is an important variable used to describe the behavior of gases and is related to other gas variables, such as volume and temperature, through the ideal gas law.

To solve this problem, we can use the combined gas law equation:

(P1V1)/T1 = (P2V2)/T2

where:

P1 = original pressure = 624.0 mmHg

V1 = original volume = 225.0 L

T1 = original temperature = 18.0°C + 273.15 = 291.15 K

P2 = new pressure (what we want to find)

V2 = new volume = 175.0 L

T2 = new temperature = -6.50°C + 273.15 = 266.65 K

Substituting the values into the equation, we get:

(624.0 mmHg x 225.0 L)/291.15 K = (P2 x 175.0 L)/266.65 K

Simplifying and solving for P2, we get:

P2 = (624.0 mmHg x 225.0 L x 266.65 K)/(291.15 K x 175.0 L)

P2 = 536.8 mmHg

Therefore, the new pressure of the gas is 536.8 mmHg.

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