can I get some help please

Answer:

food chain

Explanation:

it is transferring energy from one molecule to another in a food form

Answer:

how do I answer with no question?????????????

Answer:

2

Explanation:

to separate objects or ideas into group based on ways they are alike

Answer:

Atoms combine to form compound for the sake of stability . Atoms either share electrons and form covalent bond or there is unequal distribution of electrons between atom, so ionic bond is formed

Answer:

the blue one is f sub level in period table

Assuming the quantity of current passing through the zinc and copper electrolytes is the same, mass of Zinc deposited is (x/64) × 65.0 g.

Electrolysis is the decomposition of a substance known as an electrolyte when electric current is passed through its solution or molten form.

The mass of an electrolyte deposited when current is passed is dependent on the current and the charge on the ion.

In the electrolysis of copper and zinc, assuming the quantity of current passed through their solution are the same, the moles of each zinc and copper deposited will be the same since the charges on their ions are the same.

Assuming x g of copper is deposited.

molar mass of copper = 64.0 g

molar mass of Zinc = 65.0 g

moles of copper deposited = x/64

moles of zinc deposited = x/64

mass of Zinc deposited = (x/64) × 65.0 g

Therefore, the mass of Zinc deposited is (x/64) × 65.0 g.

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Answer:

D

Explanation:

Answer:

c i think

Explanation:

Answer: 5

Explanation:

The molecular mass of the gas if 200 mL of gas weighs 0.344 grams at STP is 38.53g/mol. Details on how to calculate molecular mass can be found below.

The molecular mass of a gas can be calculated by using the following expression:

Molecular weight of the gas = mass × volume at STP (22.4L)/ volume of gas

= 0.344 × 22.4/0.2

= 7.7056/0.2

= 38.53g/mol

Therefore, the molecular mass of the gas if 200 mL of gas weighs 0.344 grams at STP is 38.53g/mol.

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Answer:

boiling point and melting point

Explanation:

the difference of the boiling point and the condensation temperature

Answer: 10 half-lives have passed.

Explanation:

Answer:

High Polarity

Lower Density Of Ice The reason icebergs are floating on the sea surface is because of this lower density. ...

High Heat Of Evaporation When water starts evaporating off of a surface, it creates an effect of cooling. ...

High Specific Heat Water manages to stay liquid because of two of its properties, high specific heat, and its high heat of vaporization. ...

Attraction To Other Polar Molecules The property of cohesion allows liquid water to have no tension on the surface.

Explanation:

According to the given observation table a student investigate more physical properties than chemical properties of lead.

Physical properties of any substance is that proprties which are observable from the simple eyes and in which original chemical composition of substance is not changes. But at the same time some chemical properties are not observable from the simple eyes and in this change in chemical composition also takes place.

Hence student investigate more physical properties than chemical properties of lead.

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Answer:

The answer is "The student investigated more physical properties than chemical properties of lead."

Explanation:

C

Answer:

substances change from one state to another if energy is added or taken away

Answer:

methyl orange

Explanation:

i hope i hrlped you

Answer:

See below

Explanation:

I do not know the 'calculation ' to find this answer....you should just look at the periodic table of elements

U =  238.02 gm /mole

Mg = 24.305 gm/mole

Does the question want you to weigh out protons neutrons and electrons?

Explanation:

0,147 mol of CuBr2 equil  224 g/mol x 0.147 mol =33 gram

In 1 L solution dissolved 33 g of salt, but we want to get 13.9 g of salt

therefore, 13.9 g will be in the  aqueous solution of volume  0.42 L or 420 mL

( 13.9 / 33 = 0.42 L)

Answer:

1.48×10²⁴ Cu atoms

Explanation:

For this question you need to use Avogadro's number 6.022×10²³atoms.

2.45 moles of Cu ×[tex]\frac{6.022x10x^{23} atoms }{1 mole}[/tex]= 1.47539×10²⁴ atoms.

The moles cancel out so you are left with atoms.

Since there are 3 significant figures in the question there should be 3 significant figures in your answer, which is 1.48×10²⁴ Cu atoms.

Answer:

although it is possible to have more than one state, it is also possible to have only one state

Answer:

% comp. H = 2.8%, % comp. Cl = 97.2%

Explanation:

HCl mass = mass of H + mass of Cl

HCL mass = 1.00794 + 35.453 = 36.46094

% comp. of H = 1.007694 / 36.46094 x 100 = around 2.8% (2.76376308455)

% comp. of Cl = 35.453 / 36.46094 x 100 = around 97.2% (97.2355622208)

Answer:

7.5mols of S

Explanation:

just make sure your equation is balanced, and in this case it's balanced,

so now you can do more to more ratio.

so in this case we are dealing with SO2 and S.

According to our balanced equation we have 1 mol of SO2 producing 3mols of S, i.e

1mol(SO2). : 3mols(S)

we've been asked that if we use 2.5 moles of SO2, how many moles of S will be produced?

So, this is how we can determine the number of moles of S that will be produced .

SO2 : S

1mol : 3mols(S)

2.5mols: x

we cross multiply

x=2.5×3

x=7.5mols of S.

.: if we use 2.5 mols of SO2,, 7.5mols of Sulfur will be produced

Answer:

Aluminum nitrate is a salt composed of aluminum and nitric acid, belonging to a group of reactive chemicals - organic nitrate and nitrite compounds. The nitrate ion is polyatomic, meaning it is composed of two or more ions that are covalently bonded. This ion makes up the conjugate base of nitric acid.

Explanation:

Answer:

Aluminum nitrate: Is a salt composed of aluminum and nitric acid. Making this belong to a group of reactive chemicals which is an organic nitrate and nitrite compounds. The nitrate ion is polymaic. Polymaic means it is composed of two or more ions that are covalently bonded.

Explanation:

Hope This Helps

Have A Great Day

~Zero~

Answer:

I know its not Oxygen (O2) because we need that gas to breath if not more of that gas! and i know its not helium because it is not very toxic and not a crisis in the world

Your answers are going to be B. and D.

have a nice day!

The equilibrium constant is the relation between the products and the reactants of the reaction. The K, for the reaction, is 172.

The equilibrium constant (K) is the relationship in the form of a ratio that denotes the concentration of the products to the reactants in a reaction.

The balanced chemical reaction is shown as,

[tex]\rm N_{2}(g) + 3H_{2}(g) \leftrightharpoons 2NH_{3}(g)[/tex]

Given,

Concentration of nitrogen =0.521 M

Concentration of hydrogen = 0.482 M

Concentration of ammonia = 3.17 M

The value of K is calculated  as:

[tex]\begin{aligned} \rm K &= \rm \dfrac{[NH_{3}]^{2}}{[N_{2}][H_{2}]^3}\\\\&= \dfrac{(3.17)^{2}}{(0.521)(0.482)^{3}}\\\\&= 172\end{aligned}[/tex]

Therefore, the equilibrium constant for the reaction is 172.

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The the strength of an electromagnet varies with the quantity and direction of current as well as the number of turns in the coil.

An electromagnet is a material which operates by the principle of electromagnetism.

Electromagnets possesses both electrical and magnetic properties.

The strength of an electromagnet is affected by the current, the number of turns as well as the material of the electromagnet.

The strength of the given electromagnet will be affected thus:

Therefore, the strength of an electromagnet is affected by current and number of turns in the coil.

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Answer:

Using a battery with a higher voltage:

✔ stronger force of attraction

Wrapping the wire around the nail only three times:

✔ weaker force of attraction

Changing the direction of the current by reversing the battery connections:

✔ no change

Using a plastic stick in place of the iron nail:

✔ weaker force of attraction

Holding the nail vertically rather than horizontally:

✔ no change

Explanation:

Did it in edge 2023 with effort

Answer:

a or b

Explanation:

because those are the most likely to be true

now it gives you two options so i thinks it might be B but you could choose A you got two options choose wisely

Answer:

3.) Fermentation

Explanation:

Ethanol = EtOH = C₂H₅OH

Combustion:

CH₄ + 2O₂ --> 2H₂O + CO₂

Esterification:

R-CO₂H + R-OH --> R-CO₂H-R' + H₂O

Fermentation:

C₆H₁₂O₆ --> 2C₂H₅OH + 2CO₂

Polymerization:

Hydrocarbons combining to make longer hydrocarbon chains