Which six elements are generally considered metalloids

Answer: i think b.

Explanation:

Answer:Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.

Explanation:

Answer:

oxygen reacts with iron to form rust

Explanation:

The given options are;

(1)Oxygen has a melting point of 55 K.

(2) Oxygen can combine with a metal to produce a compound.

(3) Oxygen gas is slightly soluble in water.

(4) Oxygen gas can be compressed.

The statement that express the chemical property of oxygen from the question is that combination of Oxygen with a metal will  produce a compound.

(metal + oxygen → metal oxide)

(4Fe+ 3O2 → 2Fe2O)

Therefore, reaction of oxygen with metal will give a compound, hence option 2 is right

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Answer:Electric

Explanation: Its right.

Chemical energy results from the burning of wood or gasoline. Therefore, option (C) is correct.

Chemical energy is described as the energy which is stored in the chemical bonds formed in the chemical compounds. It is liberated during the chemical reaction and produces heat as a side-product which is known as an exothermic reaction.

Examples of chemical energy are biomass, natural gas, batteries, petroleum, and coal. When chemical energy is released from a compound, it is transformed into a completely new substance.

While burning wood or fuel, the chemical energy in the wood or gasoline is liberated as heat because of the chemical reaction of oxygen in the air and wood. This kind of chemical reaction is known as a combustion reaction. Combustion reaction converts the chemical energy stored in the wood into light energy and heat.

Therefore, in the burning of wood or gasoline, chemical energy is emitted.

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Answer:

0.8910 mols of NaOH in a 35.65 g sample of NaOH

Explanation:

Mass off NaOH = 39.997

given = 35.65 g of NaOH

35.65 g of NaOH * 1 mol NaOH = 0.8910, since there are 4 sig figs.

                                /40.01 g

A 35.65 g sample of NaOH contains 0.8910 moles of NaOH.

The mole, denoted by the sign "mol," is the volume of a system that has the same number of atoms in 0.012 kilograms of carbon-12 as there are elementary particles.

The mole, often known as mol, is a SI unit used to measure how many particles are present in a given substance. A mole is made up of 6.02214179 atoms or other fundamental building blocks like molecules.

Mass off NaOH = 39.997

given = 35.65 g of NaOH

No of moles of NaOH =35.65 g of NaOH × 1 mol NaOH /40.01 g

No of moles of NaOH = 0.8910 moles.

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Answer:

29. Proteins support the body's structural framework, chemical reactions, and contractions (muscle movement).

30. Proteins have a primary structure (polypeptide chain of amino acids), secondary structure (made up of alpha helices and beta pleat sheets), tertiary structure (superimposed on secondary structure), and quaternary structure (2 or more polypeptide chains with its own tertiary structure).

31. Protein molecules can denature if conditions aren't right, such as the wrong temperature or pH level. When denatured, proteins typically lose their shape and their function for a short time because their active sites become deactivated (though if conditions are too extreme, they can permanently lose their function). This happens to globular proteins because they are not nearly as stable as fibrous proteins due to their functional 3D shape.

I just did the first 3 since I could easily access the proteins section in my textbook at the moment. :)

Answer:

?

Explanation:

Answer:

Explanation:

The second best answer is its group on the periodic table.

That answer depends on the actual reason. The number of protons determines which element you are talking about.

Answer:

69.72344108

Gallium

Explanation:

Answer:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Explanation:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Answer:

5625000gm/cm^3

Explanation:

volume=w*h*l=25*15*5=1875cm^3

density=mass*volume

=1875*3000

=5625000gm/cm^3

Answer:

a hypothesis

Explanation:

A hypothesis is a statement that is supposed or assumed before conducting any experiment. It is the assumption that is made on the basis of certain knowledge and controlled evidence in the initial time of the experiment. The initial assumption helps in taking the experiment or the investigation further. The truth is not ascertained in the initial phase rather the completion of the investigation is necessary to make a hypothesis turn into a theory.  

In the given situation, the statement given is a hypothesis because the use of the warm water for the growth of the plants is the assumption made with respect to the metabolism effect on the humans.

Answer:

To adjust the substance condition, you need to ensure the quantity of molecules of every component on the reactant side is equivalent to the quantity of particles of every component on the item side. To make the two sides equivalent, you should duplicate the quantity of particles in every component until the two sides are equivalent.

Explanation:

Explanation:

what causes Spanish-American War

Answer: 35. it is 100°C

36. there is 7 periods in the periodic table

37. A heterogeneous mixture consists of visibly different substances or phases. ... Solutions have particles which are the size of atoms or molecules - too small to be seen. Oil and water form a heterogeneous or cereal and milk also makes a heterogeneous. a example of solution mixture is salt and water or rubbing alcohol.

38.  A two phase mixture is a mixture of two different substances. An example of a two phase mixture would be a soft drink. It is a liquid and a gas. To separate these two substances you could heat the liquid and then capture the carbon dioxide.

Explanation:

I hope this helps you out buddy stay safe

Answer:

Revolution that is it

Answer:

True

Explanation:

Answer:

c because it is a group of elements

Explaation:

Answer:

3 g/cm^3

Explanation:

Density can be determined by mass divided by volume, or P=m/V.

This would be 47.4 grams (mass) / 15.8 cubic centimeters (volume). The units are grams per cubic centimeter, noted as g/cm^3.

Answer:

idk

Explanation:

Answer:

It will cost 45.37 US dollars (USD) to fill a 15 gallon gas tank in Canada.

Explanation:

Two values ​​are directly proportional when when one value increases, the other increases in the same proportion, or when one value decreases, the other decreases in the same proportion.

The rule of three makes it possible to solve proportionality problems effectively and quickly. It is a method of calculating an unknown value that is directly proportional to another known value.

Then, knowing the data a, b and c, and the fourth unknown data x, which will be the unknown to be solved, this value is calculated as:

a ⇒ b

c ⇒ x

So: [tex]x=\frac{c*b}{a}[/tex]

You must calculate the cost in US dollars (USD) to fill a 15 gallon gas tank in Canada. You know that the price of gasoline is $1.07 Canadian dollars (CAD) per liter. If 1 L equals 1.06 qts, then you can say that the price of gasoline is $ 1.07 Canadian dollars (CAD) per 1.06 qts.

You can now apply a rule of three as follows: if 4 qts is equal to 1 gal, 1.06 qts is equal to how much gal is?

[tex]gal=\frac{1.06 qts*1 gal}{4 qts}[/tex]

gal= 0.265

Then you can say that the price of gasoline is $ 1.07 Canadian dollars (CAD) per 0.265 gal.  So you can apply the following rule of three: if 0.265 gal costs $ 1.07 Canadian dollars (CAD), 15 gal how many Canadian dollars cost?

[tex]CAD=\frac{15 gal*1.07 CAD}{0.265 gal}[/tex]

CAD= $60.8 CAD

Finally, you can apply the following rule of three: if $ 1.34 (CAD) is equal to $ 1.00 (USD), $ 60.8 (CAD) is equal to how many US dollars (USD)?

[tex]USD=\frac{60.8 CAD*1USD}{1.34 CAD}[/tex]

USD=   45.37

It will cost 45.37 US dollars (USD) to fill a 15 gallon gas tank in Canada.

Answer:

oxygen (O)

Explanation:

Answer:

A) oxygen (O)

Explanation:

edge 2023

Answer: okay

Explanation:

Answer:

What exactly do you want help with

Explanation:

Answer:

the answer is

removing seed casings from grains

removing salt from seawater

Explanation:

This question is regarding mixing and separating such as a physical change.

a soda bottle bubbling is a chemical reaction

copper statue is a chemical reaction

water decomposing to oxygen and hydrogen is also a chemical reaction

this question is talking about mixing and seperating as a physical change

Answer:

its help us

equation- ( a)2+(b)2+2an

Answer:

I think it is a color but I'm not completely sure

Answer:

Color

Explanation: