someone help me , quick​

Solar energy.

This whole process starts with the solar energy. It also involves the sun within the process. Solar energy is radiant light and heat that comes from the sun. So it seems to fit in with the story that was given.

Best of luck on your assignment!

- Emacathy

Answer:

B) solar energy

Explanation:

The answer would be, D. because ive taken the test.

Conclusions or predictions that are made by studying observations ,  Option D is the correct answer.

Inferences are the conclusions that are drawn based on evidence and reasoning.

These are made on the data available and not after proper research.

Inference are correct if there is enough evidence to back it.

It is asked in the question that what are Inferences among the option given

It can be concluded that Option D , conclusions or predictions that are made by studying observations , is the correct answer.

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C) Step 1: a horizontal spinning effect is formed from wind shear

Step 2: warm rising air shifts the horizontal rotation to a vertical rotation

Step 3: the vertical rotation expands and extends

Avagadros law states that at constant pressure and temperature conditions the volume is directly proportional to number of moles of gas

[tex]\frac{v1}{n1} = \frac{v2}{n2} \\[/tex]

where v1 is volume and n1 is number of moles at first instance

v2 is volume and n2 is number of moles after some of the gas is released

substituting the values in the equation

[tex]\frac{8.00 L}{1.200 mol} = \frac{5.25 L}{n2}[/tex]

n2 = 0.788 mol

after some of the gas is released only 0.788 mol remain

F, Br, l

Answer:

F, Br, l

Explanation:

Astatine is radioactive element which has symbol, At and the atomic number of the element is 85.

It belongs to the group 17 and period 6.

The elements in the same group shows similar properties as they have same general electronic configuration.

So, it shows similar properties with group 17 elements which are - F, Cl , Br, l

Answer- A

the balanced equation for the combustion reaction is as follows

2C₃H₇OH + 9O₂ ---> 6CO₂ + 8H₂O

we are assuming that O₂ is in excess and C₃H₇OH is the limiting reactant

therefore the amount of product formed depends on the amount of C₃H₇OH present.

we have to find the number of CO₂ and H₂O moles formed

molar ratio of C₃H₇OH to CO₂ is 2:6 simplified to 1:3

when 1 mol of C₃H₇OH reacts - 3 mol of CO₂ is formed

therefore when 3.40 mol of C₃H₇OH reacts - 3 x 3.40 = 10.2 mol of CO₂ is formed

molar ratio of C₃H₇OH to H₂O is 2:8 simplified to 1:4

when 1 mol of C₃H₇OH reacts - 4 mol of H₂O is formed

therefore when 3.40 mol of C₃H₇OH reacts - 4 x 3.40 = 13.6 mol of H₂O is formed

10.2 mol of CO₂ and 13.6 mol of H₂O is formed

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Explanation:

Media reflects the society. It shows the true facts about the society. Media plays a very important role in show casing the injustice or the wrong that is going on in the society. It should report all the matters correctly about the violation that occurred. It should not spread any false news but should show the truth behind any violations. It should also aware people about the cause of the violation and also the consequences of it so not it will not be repeated in the future.

Bond order: 1.

How many chemical bonds in a H₂ molecule?

There is one valence electron in each neutral H atom. Refer to a periodic table. H is one electron away from the closest noble gas: He. The H atoms need to achieve the noble gas configuration of He to be stable. For that, each H atom needs one more electron. There are two H atoms in an H₂ molecule. It will take 2 × 1 = 2 more electrons for both H atoms in each H₂ molecule to become stable.

Unlike ions, the H₂ molecule is neutral. There's no no extra electron for the H atoms. The two atoms need to share electrons with each other by forming chemical bonds. One chemical bond adds one electron to both bonding atoms. As a result, each bond will add two electrons to the molecule.

The H₂ molecule needs 2 extra electrons, which corresponds to 2 / 1 = 1 chemical bond.

What's the bond order?

[tex]\displaystyle\text{Bond Order} = \frac{\text{Number of Bonds}}{\text{Number of Bonding Sites}}[/tex].

The two H atoms in an H₂ molecule forms

As a result,

[tex]\displaystyle\text{Bond Order} = \frac{\text{Number of Bonds}}{\text{Number of Bonding Sites}} = \frac{1}{1} = 1[/tex].

The bond order of H₂ is 1, calculated by subtracting the number of antibonding electrons from the number of bonding electrons (2 - 0), then dividing by 2. A bond order of 1 corresponds to a single covalent bond between the two hydrogen atoms.

The bond order is a term in chemistry that refers to the number of chemical bonds between a pair of atoms. To calculate the bond order of H₂ (dihydrogen), we utilize molecular orbital theory. Given that the 0₁s (bonding) molecular orbital contains two electrons and the ot (antibonding) molecular orbital is empty, the calculation is straightforward. The bond order is calculated as one-half the net number of bonding electrons, which, in this case, is one-half the difference between the number of bonding and antibonding electrons:

Bond order of H₂ = ((bonding electrons) - 0 (antibonding electrons)) ÷ 2 = 2÷ 2 = 1.

This result corresponds to the single covalent bond observed between the two hydrogen atoms in a H₂ molecule, making the bond relatively strong and stable. The bond order of 1 reflects a single bond, which aligns with experimental data indicating that H₂ has a bond length appropriate for a single bond.

Answer:

When selecting a material to use as a light bulb filament, there are several important properties to consider. However, one property that is not important in this context is color. The color of the filament does not affect its functionality or performance as a light source.

The primary function of a light bulb filament is to produce light when an electric current passes through it, and its color does not impact this process. The color of the light emitted by the bulb is determined by other factors, such as the gases or coatings inside the bulb.

When selecting a material for a light bulb filament, important properties to consider include:

1. Resistance: The material should have high electrical resistance to prevent excessive current flow and overheating.

2. Melting Point: The material should have a high melting point to withstand the high temperatures generated by the electric current passing through it.

3. Conductivity: The material should have good electrical conductivity to efficiently carry the current and produce light.

4. Durability: The material should be durable enough to withstand repeated heating and cooling cycles without breaking or deforming.

5. Cost: The material should be cost-effective to produce in large quantities, as light bulbs are commonly used in everyday applications.

By considering these properties, manufacturers can select the most suitable material for the filament, ensuring optimal performance and longevity of the light bulb.

Answer:

Electronegativity difference of C and C:

0.0

covalent

Electronegativity difference of Mg and Cl:

1.8

ionic

Explanation:

When the difference in electronegativity is less than 1.5, elements generally form covalent bonds.

Electronegativity is a measure of an atom's ability to attract and hold electrons in a covalent bond. When the difference in electronegativity between two elements is less than 1.5, they generally form a covalent bond.

For the pair of elements C and C, both have the same electronegativity value of 2.5, so the electronegativity difference is 0. Since the difference is less than 1.5, C and C form a covalent bond.

For the pair of elements Mg and Cl, their electronegativity values are 1.2 and 3.0 respectively. The electronegativity difference is 1.8, which is greater than 1.5. Therefore, Mg and Cl form an ionic bond.

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All the above

-street lights

-businesses

- Homes, etc

Answer:

D. all of the above

Explanation:

How do you know if a molecule has a dipole moment?

The larger the difference in electronegativity between the two atoms, the more electronegative that bond is. To be considered a polar bond, the difference in electronegativity must be large. The dipole moment points in the direction of the vector quantity of each of the bond electronegativities added together

Answer:

0.5

Explanation:

The concept Boyle's law is used here to determine the new pressure of oxygen. There are several gas laws in order to explain the properties of a gas. Boyle's law is one among them. Here the new pressure is 0.5 atm.

Boyle's law states that at constant temperature, the volume of a given mass of gas is inversely proportional to the pressure. At constant temperature, the product of pressure and volume of a given mass of gas is constant.

Mathematically the law can be expressed as:

V ∝ 1 /P

Or PV = k (Constant)

For two gases, the equation is:

P₁V₁ = P₂V₂

Here standard pressure is 1 atm and when the volume doubles, it becomes 150.

P₂ = P₁V₁ / V₂

1 × 75 / 150 = 0.5

Thus the new pressure is 0.5 atm.

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The answer is 0.12 moles of SO2.

The answer is 0.12 moles of SO2

please mark brainiest i just need one more crown so i could be an expert please and thank you =)

Answer:

a) 5.0 g.

b) 2.94 g.

c) 0.02798 mol.

d) 2.06 g.

e) 0.1144 mol.

f) 4.0 mol/mol.

g) Yes, the experiment results corroborate with the formula BeSO₄.4H₂O.

Explanation:

a) Determine the mass of the original hydrate.

The mass of the original hydrated salt = The mass of the crucible with the hydrated salt - the mass of the empty crucible = 15.0 g - 10.0 g = 5.0 g.

b) Determine the mass of just the anhydrous salt.

The mass of the anhydrous salt = the mass of the crucible with the anhydrous salt (after heating) - the mass of the empty crucible = 12.94 g - 10.0 g = 2.94 g.

c) Calculate the number of moles of anhydrous salt using the molar mass of just BeSO₄.

The no. of moles of the anhydrous salt = mass of anhydrous salt/molar mass of BeSO₄ = (2.94 g)/(105.075 g/mol) = 0.02798 mol.

d) Determine the mass of water lost.

The mass of water lost = the mass of the crucible with the hydrated salt (before heating) - the mass of the crucible with the anhydrous salt (after heating) = 15.0 g - 12.94 g = 2.06 g.

e) Calculate the number of moles of water lost using the molar mass of water.

The no. of moles of water lost = the mass of water lost/molar mass of water = (2.06 g)/(18.0 g/mol) = 0.1144 mol.

f) Determine the smallest whole number ratio of moles of water : moles of anhydrous salt.

The smallest whole number ratio of moles of water : moles of anhydrous salt = The no. of moles of water lost/The no. of moles of the anhydrous salt = (0.1144 mol)/(0.02798 mol) = 4.089 mol/mol ≅ 4.0 mol/mol.

g) Did the experiment results corroborate with the formula BeSO₄.4H₂O?

Yes, the experiment results corroborate with the formula BeSO₄.4H₂O.

The original hydrate weighed 5 grams, while the anhydrous salt weighed 2.94 grams. There were 2.06 grams of water lost, and the molar ratio of water to the anhydrous salt was 4:1, confirming the formula for the hydrate.

The mass of the original hydrate can be calculated by subtracting the mass of the empty crucible from the mass of the crucible containing the hydrate. This gives you 5 grams (15.00 - 10.00).

The mass of just the anhydrous salt is calculated by subtracting the mass of the empty crucible from the mass of the crucible containing the anhydrous compound, giving 2.94 grams (12.94 - 10.00).

The number of moles of anhydrous salt can be calculated by dividing the mass of the anhydrous salt by the molar mass of BeSO4. Using a molar mass of 105.07 g/mol, the number of moles of anhydrous salt is 0.028 mol.

The mass of water lost is the difference between the mass of the original hydrate and the mass of the anhydrous salt. This gives 2.06 grams of water.

The number of moles of water lost is calculated by dividing the mass of water lost by the molar mass of water. Using a molar mass of 18.015 g/mol, the number of moles of water lost is 0.114 mol.

The smallest whole number ratio of moles of water to moles of anhydrous salt can be calculated by dividing the number of moles of each by the smaller of the two numbers. This gives a ratio of 4:1, which matches the formula for the hydrate, BeSO4 • 4H2O, confirming the results.

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Answer:

Fir tree

Explanation:

Producers, Consumers, and Decomposers in the Forest Community. Producers are any kind of green plant. Green plants make their food by taking sunlight and using the energy to make sugar. The plant uses this sugar, also called glucose to make many things, such as wood, leaves, roots, and bark. Rabbit, Fungus, and raccoon are all decomposers!

the hybridization is probably sp2. it will have 1pi bond. There is a double bond between C and O atoms and that double bond consists of 1 pi bond and 1 sigma bond.

Final answer:

The hybridization of carbon in Cl₂CO is sp² due to three electron domains (two Cl atoms and one double-bonded O atom) resulting in a trigonal planar geometry.

Explanation:

The hybridization of the central carbon atom in Cl₂CO (phosgene) is sp². This is because the carbon atom is bonded to two chlorine atoms and an oxygen atom through a double bond. To determine this, we analyze the electron domains around the carbon atom. With three domains (two single bonds and one double bond), it adopts sp² hybridization, which allows for trigonal planar geometry. It is important to note that the double bond with oxygen consists of one sigma (σ) bond and one pi (π) bond. The pi bond results from the lateral overlap of unhybridized p-orbitals, whereas the sigma bond is formed by the head-to-head overlap of sp² hybrid orbitals from carbon and oxygen.

26.2 kJ of energy are absorbed for every mole of carbon reacted

Answer: D) 26.2 kJ of energy are absorbed for every mole of carbon reacted.

The egg is being "cooked" by a transfer of heat defined (by its behavior in this case) called conductance. The heat is transferred from the skillet to the bottom of the egg which in turn dissipates heat to the top of the egg.

Answer:

The heat moves from the hot surface of the skillet to the bottom of the egg.

Explanation:

When a hydrogen atom and a chlorine atom react to form a hydrogen chloride molecule, the hydrogen atom acquires a partial positive charge, and the chlorine atom acquires a partial negative charge.

When a hydrogen (H) atom and a chlorine (Cl) atom react to form a hydrogen chloride (HCl) molecule, the hydrogen atom acquires a partial positive charge, and the chlorine atom acquires a partial negative charge. This is because of the electronegativity difference between hydrogen and chlorine. The hydrogen atom loses its electron to the highly electronegative chlorine atom, resulting in a partial positive charge on the hydrogen atom and a partial negative charge on the chlorine atom.

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H-H and Cl-Cl bonds break to HCl Formation bonds in an exothermic reaction. This results in hydrogen chloride or HCl, which behaves as an acid in water, producing hydronium and chloride ions.

When a hydrogen atom and a chlorine atom react, H-H bonds and Cl-Cl bonds are broken to form two moles of HCl.

The energy to break these bonds is 436 kJ/mol for the H-H bond and 243 kJ/mol for the Cl-Cl bond.

When the reaction takes place, two moles of strong H-Cl bonds form, releasing an energy of 864 kJ (432 kJ/mol for each bond).

Hence, the reaction is exothermic as more energy is released than consumed.

Furthermore, in HCl, hydrogen acquires a partial positive charge, while chlorine acquires a partial negative charge, contributing to the molecule's polar nature.

If dissolved in water, HCl behaves as an acid, transferring protons to water molecules and yielding hydronium ions and solvated chloride ions.

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The probable question may be:

When a hydrogen atom and a chlorine atom react with each other what does it formed?

C) repulsive forces between specific lone pairs of electrons. the bond angle in a water molecule is bent.

Hope it helps :)

Answer:

= 5.93 %

Explanation:

Volume % of a component is given by the formula;

= (Volume of the component/Total volume of the solution) x 100

Volume of the component = 920 mL

Total volume of the solution = 920 + 58 = 978 mL

Therefore;

Cvolume % = 58 mL/978 mL × 100%

                   = 5.93 %

Answer:

a small rock sitting on top of a big rock

a stretched rubber band

Explanation:

A small rock sittin on the top of a big rock has stored energy because of the potential energy that it contains, as well as the stretched rubber band in all the kinetic energy that is stored in the streched rubber band and it is just about to free it as soon as what is keeping it stretched liberates it.

I wanna say D dissolves wastes and nutrients.

hope this helps

Have a great night

God bless you

- Kayla :)

Answer:

D

Explanation:

the answer is 1 or A

Atom

A chemical bond forms when the atom of one element interact(s) with an atom of another element.

Final answer:

To find the percent composition of CrF3, divide the mass of each element by the molar mass of CrF3 and multiply by 100.

Explanation:

To calculate the percent composition of CrF3, you need to find the mass of each element in the compound and divide it by the overall mass of the compound. In this case, CrF3 consists of one chromium (Cr) atom and three fluorine (F) atoms. The atomic mass of chromium is 51.996 grams/mole and the atomic mass of fluorine is 18.998 grams/mole. Therefore, the molar mass of CrF3 is (51.996 g/mol) + 3(18.998 g/mol) = 130.988 g/mol. To find the percent composition of each element, divide the mass of each element by the molar mass of CrF3 and multiply by 100. The percent composition of Cr in CrF3 is (51.996 g/mol / 130.988 g/mol) * 100 = 39.6% and the percent composition of F in CrF3 is (3(18.998 g/mol) / 130.988 g/mol) * 100 = 54.4%.

True is the answer hope this helps

The ice undergoes several transformations. First it absorbs energy and its temperature to raise the temperature to 0°C the melting point of water. Then the ice absorbs latent heat of fusion to melt, then absorbs heat to raise the temperature to 100°C the boiling point of water. then the steam is heated to 195°C

Therefore the following expression is used to calculate the heat required to make these changes

MC∅(ice)+MLf(ice)+MC∅(water)+MLv(water)+MC∅(water vapor)

0.51kg×2.108kJ/KgK×(0--256)K+0.51×333.55kJ/Kg+0.51kg×4.2 kJ/KgK×(100-0)+0.51kg×2260kJ/kg+ 0.51kg×1.996kJ/kgK× (195-100)K

= 1908.84kJ