What causes water molecules to have the shape they have according to VSEPR theory

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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It would be C!

Only plants have chloroplast, they use it in the process of photosynthesis. The cell membrane is found in both plant and animal cells, though! It works to regulate whatever comes inside the cell, and it also assists in holding the cell's shape.

Answer

C

Explanation:

This is because for the first one only plant cells have chloroplasts which contain chlorophyll which is used to absorb sunlight.

The second was incorrect to because cell membranes are not present in animals cells.

The last one is incorrect because enlarged vacuoles are not present in an animals cell.

Well glass and water or more heavy then air

Answer:The light ray bends more at the air-glass boundary than at the air-water boundary.

Explanation:

Got it from plato

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%.

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

The given statement related to density is false.

Hence, the given statement is false.

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maybe it when you do not know what is going to happen the future

The ice is completely bmelted and the water temperature is above 0 degrees Celsius.

Answer:

The ice is completely melted and the water temperature is above 0 degrees celsius

Explanation:

The initial temperature of ice is 0 degree celsius.

the mass of ice is 0.060 kg

specific heat of ice = 2.108 kJ/kg K

specific heat of water = 4.184 kJ/kg K

mass of water = 0.250 kJ/kg K

initial temperature of water = 25 degree celsius

let final temperature of both ice and water = t degree celsius.

Now to reach this temperature, the ice will melt and the temperature of water will be above 0 degree celsius.

Is there a graph presented?

I need to see it in order to answer.

Answer:

3(NH₄)₂SO₄(aq) + 2Cr(NO₃)₃(aq) → 6NH₄NO₃(aq) + Cr₂(SO₄)₃(s)↓

Explanation:

3(NH₄)₂SO₄(aq) + 2Cr(NO₃)₃(aq) → 6NH₄NO₃(aq) + Cr₂(SO₄)₃(s)↓

3.0 moles of ammonium sulfate reacts with 2.0 moles of chromium(III) nitrate, forming 6.0 moles of ammonium nitrate and 1.0 mole of chromium(III) sulfate.

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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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

The exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

Hope this helped

it is either C or D but i really dont know but good luck

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 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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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?

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:

the answer is 1 or A

The balanced chemical equation for the reaction of solid carbon with oxygen gas to produce carbon dioxide is C + O_2 → CO_2. The equation is balanced as per the law of conservation of mass.

The balanced chemical reaction between oxygen gas and solid carbon to produce carbon dioxide is written as follows:

C + O_2 → CO_2

In this equation, 'C' represents solid carbon and 'O2' represents oxygen gas. On the reactant side of the equation, we have one atom of carbon and two atoms of oxygen. On the product side, we have one molecule of carbon dioxide which consists of one carbon atom and two oxygen atoms. This confirms that the equation is balanced according to the law of conservation of mass which states that the number of atoms of each element on the reactant side must be equal to the number of atoms of the same element on the product side in any given chemical reaction.

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Final answer:

Solid carbon reacts with oxygen gas to produce carbon dioxide gas, represented by the balanced chemical equation: [tex]C(s) + O2(g) - CO2(g).[/tex]  The equation balances the number of atoms on both sides, conforming to the conservation of mass.

Explanation:

When solid carbon reacts with oxygen gas, the product is carbon dioxide gas. This reaction is an important example of a combustion reaction where carbon combines with oxygen to produce carbon dioxide. The balanced chemical equation for this reaction is:

[tex]C(s) + O2(g) - CO2(g)[/tex]

In this equation, the (s), (g), and (g) represent the physical states of the substances involved: solid, gas, and gas, respectively. It's vital to balance chemical equations to reflect the conservation of mass, indicating that the same number of atoms of each element react and are present in the products. In this case, one atom of carbon reacts with one molecule of oxygen (which consists of two atoms of oxygen) resulting in one molecule of carbon dioxide.

I wanna say D dissolves wastes and nutrients.

hope this helps

Have a great night

God bless you

- Kayla :)

Answer:

D

Explanation:

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 energy decreases as you move through the trophic levels from the bottom to the top of the energy pyramid. This is because the energy is used up by the organisms at each level. The pyramid shape is used to represent the flow of energy because of the way that energy is used up and lost throughout the system.

Answer:

The energy pyramid is one type of graphical representation of ecological relationships that is in the shape of a pyramid. The base must have the largest amount of biomass (shown as the widest bar) so it can support the energy requirements of the organisms at higher levels. Each higher level in the pyramid gets smaller (the bars get narrower) because only about 10% of the available energy transfers to the next level. The shape of the energy pyramid shows that there is enough biomass energy contained in the primary producers at the bottom to support the predators at the top, even though energy is lost at each level.

Explanation:

You're question is similar to this one: https://brainly.com/question/3611487

which already has an answer.

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.

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!

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:

9414.0 J.

Explanation:

Q = m.c.ΔT.

where, Q is the amount of heat absorbed by water,

m is the mass of water (m = 150.0 g),

c is the specific heat of water (c = 4.184 J/g °C),

ΔT is the temperature difference (final T - initial T) (ΔT = 15.0 °C).

∴ Q = m.c.ΔT = (150.0 g)(4.184 J/g °C)(15.0 °C) = 9414.0 J.

basically all of the molecules in the can of soda started to stop moving due to the compression and change of temperature. the ice had frozen the molecules and which then made the can of soda nice and cold lol

The total amount of energy in the cooler remains the same. The warm soda transfers its heat energy to the ice, causing the soda to cool and the ice to melt. The cooler, soda, and water from the melted ice eventually reach a thermal equilibrium where they have the same temperature.

In the scenario where a student puts a warm can of soda in a cooler filled with ice, the amount of thermal energy in the cooler's system changes due to the process of heat transfer. This process follows the second law of thermodynamics which stipulates that heat tends to flow from hotter objects to colder objects until they reach equilibrium.

In this case, the warmer soda will transfer its heat to the colder ice. During this process, the ice will absorb the heat without a rise in temperature until all of it has melted. This is because this absorbed energy is used to break the bonds holding the ice molecules together in a solid state, causing a phase change to liquid water.

Simultaneously, the soda can's temperature drops as it loses heat to the ice. Eventually, everything in the cooler—the soda, the melted ice water, and the air within—will reach the same temperature, marking the achievement of thermal equilibrium. Therefore, the total amount of energy in the cooler remains the same, it's just transferred (not lost or gained). The energy initially within the can of soda is transferred to the ice, and the overall rise in the cooler’s temperature represent this energy transfer.

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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

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