How many liters are in 72.1 g HBr?

Answer: The given statement is False.

Explanation:

Alpha particle is a helium nuclei.

Alpha particles are produced when a larger nuclei decays into smaller nuclei in radioactive decay. Alpha particles have mass number and atomic number as 4 and 2 respectively.

General representation of alpha decay :

[tex]^A_Z\textrm{X}\rightarrow ^{A-4}_{Z-2}\textrm{Y}+^4_2\textrm{He}[/tex]

Thus the given statement that alpha particle is composed of [tex]He^{2+}[/tex] ions is False.

The statement of [tex]\rm He^2^+[/tex] ions has formed the alpha particles is true.

Alpha particles are particles that have been similar to the He-4, with the presence of two protons and two neutrons. The alpha particles have the absence of electrons and have been formed during the alpha decay.

[tex]\rm He^2^+[/tex] has been the ion of He with the positive charge indicating the loss of 2 electrons. Thus, in [tex]\rm He^2^+[/tex], there has been 2 protons, 2 neutrons, and 0 electrons.

The atomic configuration of [tex]\rm He^2^+[/tex]has been similar to the alpha particles. Thus, the statement stating, "the alpha particles to be composed of [tex]\rm He^2^+[/tex]ions " is True.

For more information about the alpha particles, refer to the link:

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Answer:

In order to be able to solve this problem, you will need to know the value of water's specific heat, which is listed as

c=4.18Jg∘C

Now, let's assume that you don't know the equation that allows you to plug in your values and find how much heat would be needed to heat that much water by that many degrees Celsius.

Take a look at the specific heat of water. As you know, a substance's specific heat tells you how much heat is needed in order to increase the temperature of 1 g of that substance by 1∘C.

In water's case, you need to provide 4.18 J of heat per gram of water to increase its temperature by 1∘C.

What if you wanted to increase the temperature of 1 g of water by 2∘C ?

This will account for increasing the temperature of the first gram of the sample by n∘C, of the the second gramby n∘C, of the third gram by n∘C, and so on until you reach m grams of water.

And there you have it. The equation that describes all this will thus be

q=m⋅c⋅ΔT , where

q - heat absorbed

m - the mass of the sample

c - the specific heat of the substance

ΔT - the change in temperature, defined as final temperature minus initial temperature

In your case, you will have

q=100.0g⋅4.18Jg∘C⋅(50.0−25.0)∘C

q=10,450 J

Answer:  186.3 g of [tex]KCl[/tex] will be produced from 2.50 mol of K

Explanation:

The balanced chemical reaction is:

[tex]2K+Cl_2\rightarrow 2KCl[/tex]  

According to stoichiometry :

2 moles of K produce = 2 moles of [tex]KCl[/tex]

Thus 2.50 moles of [tex]K[/tex] will produce=[tex]\frac{2}{2}\times 2.50=2.50moles[/tex]  of [tex]KCl[/tex]

Mass of [tex]KCl=moles\times {\text {Molar mass}}=2.50moles\times 74.55g/mol=186.3g[/tex]

Thus 186.3 g of [tex]KCl[/tex] will be produced from 2.50 mol of K

Answer:

Depression can be caused by many things, like being neglected, abused, or even trauma. Even thoughts that might trigger sadness, or anxiety it's caused by alot of problems of your life or others around you

Explanation:

hope this helps a bit :)

Answer:

jjjjajwhejwhswjiwiwvssvwvow9qiwgdvdbslw

Answer:

1) Monochrome

2) Monocot

3) Monosaccharide

4) Monounsaturated

5) Monoxide

Explanation:

The prefix mono or mon is of Greek origin and it means single, lone or one.

From the meaning of the words we can tell that they have something in common:

1) Monochrome: This refers to an artwork, a painting or drawing that has just one color.

2) Monocot: This is a type of flowering plant that has a single embryo and a single cotyledon.

3) Monosaccharide: This is a type of simple sugar that contains one sugar unit that cannot be split.

4) Monounsaturated: This refers to a molecule that contains one double or triple bond.

5) Monoxide: This refers to a form of oxide that contains only one oxygen atom.

From the definitions above, all the words mean having only one or a single item.

That is what they have in common.

Answer:

I think it is C

Explanation:

I just do.

Answer:

70 g NaCl at 20 °C Supersaturated.

Answer:

54L

Explanation:

Answer:

For these problems, we need to compare the theoretical yield that we'd get from performing stoichiometry to the actual yield stated in the problem. % yield is the actual yield/theoretical yield x 100%  

Cu + 2 AgNO₠→ Cu(NOâ‚)â‚‚ + 2 Ag ==> each mole of copper yields two moles of silver  

12.7-g Cu x ( 1 mol Cu /63.5-g Cu) x ( 2 mol Ag / 1 mol Cu) x (108-g Ag / 1 mol Ag) = 43.2-g Ag. This is the theoretical yield. Now, since we got 38.1-g Ag our % yield is:  

38.1-g/43.2-g x 100% = 88.2%

Explanation:

Answer:

Since the force applied at both ends is acting in opposite directions, then the resultant force becomes negative.

= 35 - 25 = 10

Answer:

12×8+14×3+31×2+16×4+1

96+52+62+48+1

259grams

Answer:

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Explanation:

Do you want ro bux do you play ro blox i need your username and password

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please trust me ty if you do you  get extra 5,000 k

Answer:

but iron is 2 and 3 by its valance how could it be possible

Answer:

What do you want answered?

Explanation:

Answer:

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Answer:

im gonna say A

Explanation:

i say A because i mean biotic potential is residing in the catagory birth rate which is how many the lay a year penguins have already reached the amount they are gonna lay robins the literally have no exact stop point its between 5 and 10 a year like said. so if u look at the amount they have each they have both reached there maximum point. but penguins only lay eggs once a year while robins well 5 to 10 reaching there maximum potential.

The conjugate base is formed when an acid loses its hydrogen or proton. In the reaction between ammonium ion and hydrogen phosphate, HPO₄²⁻ is the conjugate base. Thus, option C is correct.

Conjugate bases are formed when the substance accepts or absorbs the proton or the hydrogen ion from the acids in the solution. It can be said as a base with an added hydrogen ion to it.

The chemical reaction of the acids and the bases has been shown as,

NH₄⁺ + HPO₄²⁻ → NH₃⁺ +  H₂PO₄⁻

From the reaction, it can be said that ammonia donated its proton, whereas HPO₄²⁻ accepted hydrogen ions from the acid.

Therefore, HPO₄²⁻ has been the conjugate base in the given chemical reaction.

Learn more about conjugate base here:

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Answer: Silicon tetrachloride (g) + Mg (s) [tex]\rightarrow[/tex] Silicon (s) + Magnesium chloride (s)

[tex]SiCl_4(g)+Mg(s)\rightarrow Si(s)+MgCl_2(s)[/tex]

Explanation:

The word equation for Solid silicon and solid magnesium chloride form wen silicon tetrachloride gas reacts with magnesium metal :

Silicon tetrachloride (g) + Mg (s) [tex]\rightarrow[/tex] Silicon (s) + Magnesium chloride (s)

The skeletal equation where law of conservation of mass is not followed will be:

[tex]SiCl_4(g)+Mg(s)\rightarrow Si(s)+MgCl_2(s)[/tex]

Answer: B. Potential energy

Explanation:

There are several form of potential energy including gravitational, magnetic, electrical, chemical and eleastic potential

Answer:

Potential Energy

Explanation:

Potential energy is stored energy and the energy of position.

Chemical, Gravitational, and Elastic are all stored energy and the energy of position.

Hope this helps!

:D

Answer:

Ca²⁺, S⁻²

Explanation:

Calcium (Ca) is a metallic element and belongs to group II of the Periodic Table. So, it can lose 2 electrons to form the positively charged ion Ca²⁺.

Sulfur (S) is a non-metal element, so it has the tendency to gain electrons and to form anions. It accepts two electrons to form the sulfide ion S²⁻.

Answer:

c

Explanation:

A pathogen or infectious agent is a biological agent that causes disease or illness to its host. The term is most often used for agents that disrupt the normal physiology of a multicellular animal or plant. However, pathogens can infect unicellular organisms from all of the biological kingdoms.

Answer:

Harmful to living organisms

Explanation:

tbh, quizzlet lol

Answer:

Increased

Explanation:

We know that the higher the temperature the higher the rate of reaction. This implies that as the temperature is increased, a reaction tends to proceed faster.

This follows from the collision theory, the higher the temperature, the higher the energy of the reacting particles hence they collide with each other faster and more effectively.

Thus the rate of reaction( or reaction time) for the carton of milk on the counter was increased.

Answer:

2802.5 KJ/mol

Explanation:

Calculate standard enthalpy of the Reaction :

6CO2(g) + 6H2O(l)C6H12O6 + 6O2(g)

using standard formation enthalpies . hence the standard enthalpy of the reaction = 2802.5 KJ/mol

attached below is the detailed solution

Answer:

interphase

Explanation:

they spend most time in interphase

Answer:

See explanation

Explanation:

When either pan is heated, energy is transferred via conduction. Conduction is the process by which heat is transferred through a material, the average position of the particles remaining the same.

When the pans are heated, the particles in each pan vibrate faster and transfer this energy rapidly to neighboring particles.

The pan with a thicker base has more particles in it than the pan with lighter weight base. Note that, The rate of heat transfer is inversely proportional to the thickness of the material in question. Hence, the thicker the base, the more the number of particles present and the longer the time it takes for the food to cook.

Answer:

The third one!

Answer:

Explanation:

when a car begins to slow down the speed that it was going will decrease. Which means that it is an example of deceleration.

Answer:

The answers would be : ( a car approaching a red light )

15 N .

F= m.a ----> 15 = 5.3