A 10 cm3 piece of aluminum has a higher density than a 5 cm3
of aluminum. True or false

Answer:

Selective Breeding

Weeds are bad,

But why is this so?

Just like grass,

They too grow.

Weeds are disliked,

Like the drink that's spiked.

But why is this so?

Who's to say they shouldn't grow?

The weed is unwanted,

Like a murderer hunted.

But what crime did it commit?

Why should it not, be free to sit?

Thickly they may grow,

But grass even more so.

Who's to say they should not grow?

Why should their seed not be sow?

Weeds are bad,

But why is this so?

Just like grass,

They too grow.

If all things living, were for cared,

The land we own, for all shared.

The weed let live,

And life not carefully selected by- siv.

Selective breeding is unfair,

No better than plain warfare...

Explanation:

The ΔH fusion used to calculate the energy released when a mass of liquid freezes by using the formula Grams liquid x mol/g x ΔH fusion.

The enthalpy of fusion of a substance, also known as (latent) heat of fusion, is the change in its enthalpy resulting from providing energy, typically heat, to a specific quantity of the substance to change its state from a solid to a liquid, at constant pressure.

Heat of formation or enthalpy is given for any one mole of substance.

And it will be calculated for moles of gases as, so for this first mass will be converted into moles as-

n = W/M, where

W = given mass in grams

M = molar mass in g/mol

and then multiply the given moles by the enthalpy of formation of one mole.

Hence, Grams liquid x mol/g x ΔH fusion is used.

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Answer:

ANSWER

Explanation:

Answer:

3.125g

Explanation:

100/2
50   1
50/2
25    2
25/2
12.5   3
12.5/2
6.25   4
6.25/2
3.125g   5

Answer:

pV= nRT

Explanation:

(p1 × V1)/ T1/ (p2 × V2)/ T2

Answer:

C

Explanation:

Adding and acid and base together until it is completely neutralized will give us water and a salt.

For example:

HCl + NaOH --> NaCl + H2O

HCl being the acid

NaOH being the base

The H2O is water

The NaCl is the salt

Answer:

If 50.0 grams of HCl were dissolved in enough water to make a solution with a total volume of 5.0 liters, then the molarity of the solution is 0.282M.

How do we calculate molarity?

Molarity of any solution will be calculated by using the below equation:

M = n/V, where

n = moles of solute

V = volume of solvent in L

Moles will be calculated by using the below equation:

n = W/M, where

W = given mass = 50g

M = molar mass = 35.45 g/mol

n = 50/35.45 = 1.41 moles

On putting values in the above equation, we get

M = 1.41mol / 5L = 0.282M

Hence required molarity of solution is 0.282 M.

Explanation:

Answer:

here down below is the anwser

Explanation:

Whereas ionic compounds are usually formed when a metal and a nonmetal combine, covalent compounds are usually formed by a combination of nonmetals. Thus, the periodic table can help us recognize many of the compounds that are covalent.

Answer:

A) Which brand and amount of fertilizer will work best?

Explanation:

A) is the best answer because it takes into account all of the variables. The variables seem to be the amount of fertilizer, average plant growth, and brand of fertilizer. The independent variables are amount of fertilizer and fertilizer brand. The dependent variable is the plant growth.

B) is not the best answer because it does not include the amount of fertilizer. Because this variable is changing, it is important to consider.

C) is not the best answer because it does not take the type of fertilizer into account. If the researcher were only concerned with how the amount of fertilizer affects plant growth, it would not be necessary to include 3 different types of fertilizer.

D) is not the best answer because this doesn't explain why the researcher used different types of fertilizer.

Answer: Most of Earth's carbon was inherited directly from the interstellar medium, it is the material that exists in space between stars in a galaxy.

Explanation: All of the carbon and oxygen in all living things are made in the nuclear fusion reactors that we call stars. The early stars are massive and short-lived. They consume hydrogen, helium, and lithium and produce heavier elements.

Hope this helps!

Antibodies are part of the human immune system. Basically, they identify bad bacteria and viruses and track them down to fight back.

Answer:

option 1

Explanation:

you can never have all your reactants used up coz it is not possible eg in space u only loose SOme of gravity

The statement that is a characteristic of water is strong cohesion. Details about characteristics of water can be found below.

Water is a unique molecule which is attributed to its unique characteristics or features.

Water is made up of two hydrogen atoms and one oxygen atom that are chemically bonded to one another.

Some of the characteristics of water are as follows:

Therefore, the statement that is a characteristic of water is strong cohesion.

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The balanced equation for the combustion of biodiesel is CH₄ + 2O₂ = CO₂ + H₂O.

Combustion reaction is the reaction in which a substance react with oxygen to produce energy and heat. It is an exothermic reaction.

The combustion of biodiesel with oxygen form carbon dioxide and water.

Thus, the  balanced equation for the combustion of biodiesel is CH₄ + 2O₂ = CO₂ + H₂O.

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The non-contact forces portfolio includes Gravitational force, Magnetic force and Electrostatic force.

Non contact forces are those forces which are applied on any object without any physical interference or contact.

Some non-contact forces are:

Hence Gravitational force, Magnetic force and Electrostatic force are the non-contact forces.

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Answer:

Explanation:

3.81 m. = 150 inches.

I can't find explanation. Hope this is my best!

The earth's first oceans would have obtained freshwater as a result of the condensation of water vapor in the atmosphere back then.

The freshwater of oceans was hypothesized to have been formed by the condensation of water vapor present in the early atmosphere of the earth.

The water vapor was thought to have emanated from volcanic activities. The condensation was in the form of rain and the resulting puddles merged together to form the oceans.

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A given substance that has a melting point of -7C and a boiling point of 59C exists as a liquid at room temperature conditions.

The states of matter refer to the separation of the molecules of a given material in certain temperature conditions.

The states of the matter are three and include the gaseous state, liquid state and solid-state.

In conclusion, a given substance that has a melting point of -7C and a boiling point of 59C exists as a liquid at room temperature conditions.

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Answer:

gram

Explanation:

Gram is a SI unit       (International Ststem of units)

   other SI units :   kg , meter, ampere,  Kelvin

pound   gallon and foot are   SAE (or imperial) units

Explanation:

option option B is the correct answer of given statement helium-4(He)=2

The advantage of Bronsted-Lowry base theory over the Arrhenius base theory is that the Bronsted-Lowry bases can act as proton acceptors.

According to the definition of Bronsted-Lowry, a base is a proton acceptor. In that case, the concept of bases is not limited to only the hydroxide ions.

Thus the advantage of Bronsted-Lowry base theory over the Arrhenius base theory is that the Bronsted-Lowry bases can act as proton acceptors.

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Answer:

In CO there is one mole of Carbon and one mole of Oxygen so the number of atoms will be for two mols

Explanation:

Answer:

2C8H18+25O2→16CO2+18H2O.



Electrophillic addition occurs when the substrate has a double bond and the attacking agent is a electrophile.

The term electrophillic addition refers to a type of addition that occurs when the substrate has a double bond and the attacking agent is a electrophile.

The mechanism of the electrophillic attack on methyl propene as shown indicates that the attacking agent is an electrophile(Br^+).

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Answer:

Here down below is the equation

Explanation:

Iron (III) chloride can be produced by the reaction shown in this equation:

2Fe +3C2 (arrow) 2FeCl3

Calculate the maximum mass of Iron (III) chloride that can be produced from 11.20 grams of iron?

Relative atomic masses: Cl= 35.5 , Fe =56

The maximum mass of iron(|||) chloride(FeCl₃) that can be produced from 11.20g of iron is 0.069 grams.

Mass can be defined as inertia is a quantitative measure of a fundamental feature of all stuff.

It can also be defined as weight is defined as the force exerted by an item while mass is defined as the amount of matter in an object.

The SI unit of mass is kilogram or gram.

Mass can be expressed as

Mass =  Given mass of substance / Formula mass

Mass of substance = 11.20 g

Formula mass of FeCl₃ = 162.2

So, mass = 11.20 g / 162.2 g

               = 0.069 grams

Thus, the maximum mass of iron(|||) chloride(FeCl₃) that can be produced from 11.20g of iron is 0.069 grams.

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Answer:

It would decrease.

Explanation:

This is because there is not enough food (ant) for the ant-lion group.

Answer:

c: fermenting of cheese

Answer:

c

Explanation: