A hot air ballon will rise in air because:

Answer:

the same as

Explanation:

that's what makes the most since to me but i may be wrong

Answer:

[tex]d=2.15g/mL[/tex]

Explanation:

Hello there!

In this case, since the density of the metal is computed as shown below:

[tex]d=\frac{m}{V}[/tex]

We need to calculate the volume of the solid by subtracting the final volume and the initial volume of water:

[tex]V=54.10mL-45.50mL\\\\V=8.60mL[/tex]

Thus, we obtain:

[tex]d=\frac{18.5g}{8.60mL}\\\\d=2.15g/mL[/tex]

Best regards!

Answer:

full octets live in noble gas world so you need to be whatever your charge is away from there in steps on the periodic table so s-1 is the one that falls short as it is 2 moves away from Ar which is its closest Noble gas

Explanation:

Answer:

0.052 M.

Explanation:

Hello!

In this case, since the molarity is computed by dividing the moles of the solute by the volume of the solution in liters (M=n/V), we first need to compute the moles in 5.025 grams of NaOH as shown below:

[tex]n=5.025g*\frac{1mol}{40.0g}\\\\n=0.126mol[/tex]

In such a way, we compute the molarity as show below:

[tex]M=\frac{0.126mol}{2.4L}\\\\M=0.052M[/tex]

Best regards!

Answer:

[tex]\boxed{\bold { \large { \boxed {KE=\frac{1}{2} mv^2 \ , \ PE=mgh}}}}[/tex]

Explanation:

Kinetic energy formula

[tex]\displaystyle KE=\frac{1}{2} mv^2[/tex]

Potential energy formula

[tex]\displaystyle PE=mgh[/tex]

[tex]\displaystyle KE \Rightarrow \sf kinetic \ energy \ (J)[/tex]

[tex]\displaystyle PE \Rightarrow \sf potential \ energy \ (J)[/tex]

[tex]\displaystyle m \Rightarrow \sf mass \ (kg)[/tex]

[tex]\displaystyle v \Rightarrow \sf velocity \ (m/s)[/tex]

[tex]\displaystyle g \Rightarrow \sf acceleration \ of \ gravity\ (m/s^2)[/tex]

[tex]\displaystyle h \Rightarrow \sf height \ (m)[/tex]

Is the equation wrong. Such a equation cannot be formed. pls enter the write equation i will help you

Answer:

A

Explanation:

Answer:

to end segregation

Explanation:

National Association for the Advancement of Colored People (NAACP), interracial American organization created to work for the abolition of segregation and discrimination in housing, education, employment, voting, and transportation; to oppose racism; and to ensure African Americans their constitutional rights.

To end segregation was a major goal of the National Association for the Advancement of Colored People when it was formed in 1909. Therefore, the correct option is option B.

A group of individuals led by W. E. B. Du Bois, Mary's White Ovington, Moorfield Storey, and Ida B. Wells founded the National Association over the Advancement of Coloured People (NAACP) in 1909 as an interracial effort to advance fairness for African Americans. Roy Wilkins and Thurgood Marshall were among the group's leaders.

"To ensure the equal treatment in politics, schools, society, and the economy of the liberties of all persons as to eliminate ethnicity-based discrimination" is its stated objective for the twenty-first century. Political lobbying, public relations campaigns, and legal team-developed lawsuit strategies are just a few of the national NAACP initiatives. To end segregation was a major goal of the National Association for the Advancement of Colored People when it was formed in 1909.

Therefore, the correct option is option B.

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Answer: see below

Explanation: for 75 ml, take 45*75 mg of BSA and make up to 75 mL with distilled water.

Answer: 682 grams

Explanation:

The balanced chemical reaction is:

[tex]4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]

[tex]O_2[/tex] is the limiting reagent as it limits the formation of product and [tex]Fe[/tex] is the excess reagent.

According to stoichiometry :

3 moles of [tex]O_2[/tex] produce = 2 moles of [tex]Fe_2O_3[/tex]

Thus 6.40 moles of [tex]O_2[/tex] will produce=[tex]\frac{2}{3}\times 6.40=4.27moles[/tex]  of [tex]Fe_2O_3[/tex]

Mass of [tex]Fe_2O_3=moles\times {\text {Molar mass}}=4.27moles\times 159.69g/mol=682g[/tex]

Thus 682 g of [tex]Fe_2O_3[/tex] will be produced from 6.40 moles of oxygen

Answer:

11.) Radio

12.) Microwave

13.) Infrared

14.) Ultraviolet

15.) X-Ray

16.) Gamma Ray

Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.

Answer:

False

Explanation:

Depends mostly on heating of the earths surface being uneven

It is false that global wind patterns have less to do with air temperature than local winds.

Local winds are those that blow over a small area. Local geography, such as proximity to an ocean, has an impact on them.

Monsoons and land and sea breezes are among them. Global winds occur in belts all over the world.

Temperature differences, particularly the difference in heating at the equator and poles, and the Earth's rotation determine the global atmospheric circulation pattern.

By transporting heat and water, winds shape regional climate and influence daily weather.

Global winds are winds that occur in belts that circle the globe. Global winds, like local winds, are caused by uneven heating of the atmosphere.

Because of the Coriolis effect, winds blow diagonally across the surface.

Thus, the given statement is false.

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Answer:

85.6 g

Explanation:

Step 1: Write the balanced combustion equation

C₃H₈ + 5 O₂ ⇒ 3 CO₂ + 4 H₂O

Step 2: Calculate the moles corresponding to 140 g of H₂O

The molar mass of H₂O is 18.02 g/mol.

140 g × 1 mol/18.02 g = 7.77 mol

Step 3: Calculate the moles of C₃H₈ needed to produce 7.77 moles of H₂O

The molar ratio of C₃H₈ to H₂O is 1:4. The moles of C₃H₈ needed are 1/4 × 7.77 mol = 1.94 mol.

Step 4: Calculate the mass corresponding to 1.94 moles of C₃H₈

The molar mass of C₃H₈ is 44.10 g/mol.

1.94 mol × 44.10 g/mol = 85.6 g

Answer:

Na2S, it is the formula unit

Explanation:

The representative particle of CO2 is the molecule, while for Na2S, it is the formula unit

Answer:

Explanation:

physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.

Answer:

Anything that takes up space.

Explanation:

Anything that has both volume and mass.

Answer:

d

When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

Answer:

0.74  g O

3

​

=

48

0.74

​

=0.0154 mol O

3

​

0.67 g NO=

30

0.67

​

=0.0223 mol NO

O

3

​

 is the limiting reagent and NO is in excess =0.0223−0.0154=0.007 mol

Thus, O

3

​

 taken =NO

2

​

 formed =0.0154 mol NO

2

​

                             =0.0154×46 g NO

2

​

Explanation:

Answer: If the potential energy of the reaction system decreases, then kinetic energy in the surroundings increases and the temperature of the surroundings rises

Explanation:

The decrease in the potential energy results in an increase in the temperature of the system and surroundings.

Mechanical energy has been described as the sum of the kinetic and the potential energy in the system. With the increase in the potential energy, there has been a decrease in the kinetic energy and vice versa.

The decrease in the potential energy results in an increase in the kinetic energy of the system. The kinetic energy has been termed as the energy of performing work. The rise in the kinetic energy results in an increase in the work done in the system and there has been an increase in the temperature of the system.

Thus, the decrease in the potential energy results in an increase in the temperature of the system and surroundings.

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Answer:

electrons are moved through a magnet creating a current. the current instracts with a circuit, moving the conductor in the onentation of the field

Answer:

B. is the answer

Explanation:

Energy in form of heat is transferred from the warmer mashed potatoes to the cooler spoon.

Answer:

There are two major categories of energy: renewable and non-renewable.

Non-renewable energy resources are available in limited supplies, usually because they take a long time to replenish. The advantage of these non-renewable resources is that power plants that use them are able to produce more power on demand. The non-renewable energy resources are:

Renewable resources, on the other hand, replenish themselves. The five major renewable energy resources are:

While renewable energy resources have the advantage of unlimited supply over the long haul, they are limited in their availability at any given moment.

For example, the sun rises each day, but its ability to generate power is limited when its cloudy. Another disadvantage is that power plant operators can’t crank up renewable energy production when people are consuming more power, such as on a hot day when many people are running air conditioners at the same time.

Answer:

Threats to the Great Lakes' ecosystems, include invasive species, climate change, pollution, and habitat destruction. Climate change affects water temperatures, weather patterns, and lake levels. Pollutants from residential, agricultural, and industrial areas reduce water quality.

Explanation:

I hope this helps answer your question

:D

Answer:

Other human activities that have had an impact on the Great Lakes include intentional water level regulation, man-made alterations such as dredging, diversions, and water withdrawals, which have resulted in earlier thawing of the lakes, lower water levels, and, of course, the spread of industrial waste.

Explanation:

Answer:

You eat a hamburger and breathe in oxygen.

Oxygen goes immediately from your lungs to blood vessels to cells.

Food molecules in the hamburger are broken down into glucose in the digestive system.

Explanation:

Answer: the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

Explanation:

Answer:

k = 0.0866 days⁻¹

Explanation:

The isotope decay of the atom follows the equation:

ln [A] = -kt + Ln[A]₀

Where [A] is the amount of the isotope after time t = 8.25mg

Time = 12.8days

k is rate constant

[A]₀ is actual amount of the isotope = 25.0mg

Replacing:

ln 8.25mg = -k*12.8days + ln 25.0mg

2.11 - 3.22 = -k*12.8days

-1.11 = -k12.8days

k = 0.0866 days⁻¹

Answer:

Alkane

Explanation:

Alkane is a class of organic compounds that contain only carbon and hydrogen and the carbon atoms are connected to each other by single bonds.

Now, if we look at the molecule whose condensed structural formula is shown in the question, we will notice that the compound can only contain single bonds. That is, the molecule is a saturated hydrocarbon(alkane).

I have drawn out the full structure of the compound to illustrate this point.

Answer:

No

Explanation:

it will not be a irreversible change because u can give back the pen if it is in its original state and the shop keeper might accept it back that is what mostly happens. if the pen breaks or is used then it might me called a irreversible change until then it is reversible if not used yet.

thank u

Answer:

No

this is reversible because you can return the pen.