Which statement defines specific heat capacity for given sample?
O the temperature of a given sample
1 %
the temperature that a given sample can withstand
O the quantity of heat that is required to raise the sample's temperature by 1°C (Kelvin)
O the quantity of heat that is required to raise 1 g of the sample by 1°C (Kelvin) at a constant pressure

Answer:

1) all matter is made up of atoms and molecules 2) these tiny particles are always in motion; the higher the temp. the faster they move 3) at the same temp., heavier particles move more slowly then small particles

Explanation:

Answer:

Mass=23

Explanation:

Mass= Protons + neutrons

Atomic number is the number of protons in magnesium.

Atomic number =12...So there are 12 protons

12p + 11n = 23

Answer:

n = 7.86 mol

Explanation:

This question can be solved using the ideal gas law of PV = nRT.

Temperature must be in K, so we will convert 22.5C to 295 K ( Kelvin = C + 273).

R is the ideal gas constant of 0.0821.

(2.24atm)(85.0L) = n(0.0821)(295K)

Isolate n to get:

n = (2.24atm)(85.0L)/(0.0821)(295K)

n = 7.86 mol

Answer:

the attraction water molecules have to other surfaces

Explanation:

Adhesion is defined as  the attractive forces between unlike substances, e.g water moving up a capillary tube.

Adhesion is the tendency of dissimilar particles or surfaces to cling to one another(Wikipedia).

So, what we mean by adhesion in this context, is the attraction water molecules to other surfaces.

Answer: 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

The balanced chemical reaction is:

[tex]6HCl(aq)+2Al(s)\rightarrow 3H_2(g)+2AlCl_3(aq)[/tex]  

According to stoichiometry :

2 moles of [tex]Al[/tex] produce = 3 moles of [tex]H_2[/tex]

Thus 1.20 moles of [tex]Al[/tex] will produce=[tex]\frac{3}{2}\times 1.20=1.80moles[/tex]  of [tex]H_2[/tex]

Thus 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.

Answer: D

Explanation:

because mold is a chemical reaction with with the air that's why the put a date cause the bread can only last for so long in till the chemical reaction.But D is is right because your body has to go though a chemical reaction in or to digest it and and break it down even more.So D would be the right answer cause that's where most of your chemical reaction happens when food is swallowed into the stoamch i hope i was able to explain it as much as i can

Answer:

Our discussion up to now has centered on types of bonds that involve. This kind of bonding is called ionic bonding (as you are almost certainly already aware). NaCl is a solid at room temperature, with a very high melting point (801 °C), similar highly reactive metal – sodium (Na), and a pale green gas – chlorine (Cl2).

Explanation:

I hope this is what you needed. I also hope that you have a great day.

Answer:

C. The Zebra Mussels had not yet been introduced to the area.

2.

Unionid Mussels they had a headstart in 1990

Answer:

yeppppppppppppp

Answer:

yes

plants makes the oxygen by the

process of photosynthesis and

release to environment and animals

uses these oxygen to survive on this Earth

hope it helps

Answer:

Answer is C since activation energy is needed in a reaction

Potential energy is the energy present in the reactions. The potential energy of the reactant in the graph is more than that of the product. Thus, option A is accurate.

Potential energy is the energy of the reaction that results in the formation of products. The potential energy is reduced in the exothermic reactions as energy is released along with the products.

The bonds present in the reactants in the reaction mixture split in the presence of the activation energy to release energy and form the product.

Therefore, option A. the graph shows the greater potential energy of the reactant.

Learn more about potential energy here:

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Answer:

it would be C average kinetic energy

Answer:

14:Function 18:evaporation and distillation

Answer:

0.13 grams of O2

Explanation:

Just did worksheet

Sulfur hexafluoride (SF6) is a synthetic fluorinated compound with an extremely stable molecular structure.

The first response option is the right one. A compound is a material made up of many atoms from various elements, such as SF6 (sulfur and fluorine).

The second option is wrong because, although SF6 does include seven atoms, those atoms are not all the same—six of them are fluoride atoms and one is a sulfur atom.

Because SF6 can be chemically divided into simpler chemicals that are elements, the third answer option is untrue.  The six S and six F atoms each have their own nucleus, hence SF6 does not have a single nucleus.

Therefore, Sulfur hexafluoride (SF6) is a synthetic fluorinated compound with an extremely stable molecular structure.

To learn more about sulfur hexafluoride, refer to the link:

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Answer:

sorry sorry sorry sorry

Answer:

8 moles of oxygen.

Explanation:

The chemical formula for barium hydroxide is Ba(OH)₂

This means one mole of barium hydroxide contains one mole of barium, two moles of hydrogen, and two moles of oxygen. If you have four moles of Ba(OH)₂ you will have four times the amount that is found in one mole.

4 moles of Ba(OH)₂ will have 8 moles of oxygen.

The number of moles of oxygen atoms we have in the compound is 8 moles .

The chemical equation for barium hydroxide is as follows:

Ba(OH)₂

According to the compound we have 1 atom of barium, 2 atoms of oxygen and 2 atoms of hydrogen.

Therefore, 4 moles of the compound can be represented as follows;

4 Ba(OH)₂

This means we have 4 atoms of barium, 8 atoms of oxygen and 8 atoms of hydrogen.

Therefore, we have  8 moles of oxygen atoms or 4 moles of oxygen molecules.

learn more: https://brainly.com/question/12228235?referrer=searchResults

Answer:

8.85 because im smart

When the Zebra arrived they ate all the food in the area leaving Unionid numbers to decline and die as they have no food to eat.

Answer:

[tex]a=200\ m/s^2[/tex]

Explanation:

Given that,

The mass of a ball, m = 0.025kg

The force exerted by the magnet, F = 5 N

We need to find the acceleration of the ball when it begins to move. Let a be the acceleration. The net force of the ball is given by :

F = ma

Where

a is acceleration of the ball

[tex]a=\dfrac{F}{m}\\\\a=\dfrac{5}{0.025}\\\\a=200\ m/s^2[/tex]

so, the required acceleration of the ball is [tex]200\ m/s^2[/tex].

Answer:

Selenium

Explanation:

One way to figure this out is to count the electrons and add them up.

2+2+6+2+6+2+10+4 = 34 electrons

A neutral atom has the same number of electrons and protons. Protons tell us the atomic number of an element. Element number 34 is Selenium.

Another way to figure it out is to look at just the highest "s" or "p" level of the electron configuration, and then see which element corresponds to that. This element has a 4s and a 4p, so I will look at 4p. The configuration is 4p4, so I will look at the 4th row of the periodic table (4p4) in the "p" block (4p4) and the 4th element in the "p" block (4p4). That's selenium :)

Nitric acid, is a highly corrosive mineral acid. The pure compound is colorless, but older samples tend to acquire a yellow cast due to decomposition into oxides of nitrogen and water.

There are THREE different elements and a total of FIVE atoms in nitric acid.

The formula for nitric acid is HNO3. This means there is one atom of hydrogen, one atom of nitrogen, and three atoms of oxygen in one molecule of nitric acid.

So, Thus, your answer will be FIVE if you're counting the molecules but if you are counting the elements then it is THREE.

-Snooky

Answer:

Inside the DNA molecules

Answer:

Genes give instructions to proteins; protein structure determines traits.

Explanation:

Answer:

strong winds that blow in short spurts over a small distance

Explanation:

Generally, the most common factor that causes the largest waves in the ocean is winds. this is also called wind-driven waves of the ocean when the surface wind flows on the surface of the ocean, this disturbance creates the friction between surface wind and surface of the ocean which creates waves in the ocean

Answer:

B

Explanation:

k-12 test

Answer: Eutrophication is the enhancement of the growth of algae in the water body.

Explanation:

The scientists are worried for the climate change as if the climate changed to prolonged rainy then the frequent raining can remove toxic chemicals from the agricultural sites, landfills, industries, and from other locations and deposit them to the water body (river, lakes, ponds, and others). The deposition of the salts of nitrogen, phosphorus, and sulfur promotes the growth of algae in the water body. This leads to reduction in the concentration of oxygen in the water body. This is called eutrophication. The lack of oxygen can lead to mortality of aquatic animals.

Answer:

70000 cm in 7km

Explanation:

There are 1000 m and 100 cm in 1 m in 1 km, so to find how many cm are in 7 km you need to do 10000 x 7.  You get 70000

Have a nice day!

Answer:

700000cm

Explanation:

1 km consists of 1000m and 1 m consists of 100 cm so 7×1000×100=700000cm