I want the answer of first and last question not middle question answer ​

Answer:

Heat is included as one of the products for eg:

C+O2 gives CO2 + heat

hope it helps!

To convert from L to ml, we move three spaces to the right and the decimal place moves three places.

Our task here is to convert 600 L to mL. we have to remember that to convert from L to ml, we have to multiply the value in L by 1000

In other words, the value 1000 is known as the conversion factor.

When we do this, we move the decimal place three places to the right to have 600000.00mL

For more about conversion factors, see:

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Answer:

D: Atmospheric pressure is greater than vapor pressure,and water molecules escape from the solution into the air.

Atmospheric pressure is greater than vapor pressure, and water molecules escape from the solution into the air, which occurs during boiling. The correct option is D.

Boiling is a process when more heat is given to any liquid, it starts to boil. When the temperature is increased, boiling happens, but only in liquid. The molecules of liquid start to turn into vapor and start to escape into the atmosphere.

It is also called the vaporization of the liquid. The boiling points of different liquids are different, and they start to boil at their own temperature.

Thus, the correct option is D. Water molecules escape from the solution into the air when atmospheric pressure exceeds vapor pressure.

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The empirical formula is the simplest formula of a chemical compound.

To find the empirical formula, we take the following steps;

1) O - 88.10/16,      H - 11.190/1

  O - 5.5,               H - 11.19

  O - 5.5/5.5,        H - 11.19/5.5

  O -  1,                 H - 2

Empirical formula = OH2

2) C - 41.368/12  H - 8.101/1,   N - 32.162/14,   O - 18.369/16

   C - 3,               H - 8,           N - 2,                  O - 1

   C - 3/1,            H - 8/1          N - 2/1                 O - 1/1

    C - 3,             H - 8,           N - 2,                   O - 1

Empirical formula = C3H8N2O

To obtain the molecular formula where n = number of atoms of each element;

Molecular weight = 174.204 g/mol

[ 3(12) + 8(1) + 2(14) + 16]n = 174

n= 174/88

n = 2 (to the nearest whole number)

Hence, we have;

[C3H8N2O]2

The molecular formula is C6H16N4O2

3)  C - 19.999/12,  H - 6.713/1,   N - 46.646/14,   O - 26.641/16

    C - 2,                H - 7,            N -  3,                 O - 2

    C - 2/2,            H - 7/2,         N -   3/2,             O - 2/2

    C - 1,                H - 4,            N -  2,                  O - 1

Empirical formula - CH4N2O

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Answer:

410-52=358

3.054+1.16=4.214

Answer:

MgO2

H202

NH4)2SO4

Explanation:

hope this helps you

Answer:

It because ,sodium is a metal and chlorine is a non metal

Answer:

H2O + SO2 → H2SO3

Explanation:

H2O + SO2 → H2SO3

Answer:

l think this is the answer .

Answer:

Do not incinerate "why the gas in the gas is initially at 23degree and 360kPa and the can has a volume of 350Ml

D

Answer:

the group with helium at the top

Explanation:

I just took it

Answer:

Explanation:

It's called a Redbox reaction because when a change in oxidation number occurs in a reaction, with both an increase in number and a decrease in number, then the reaction is classified as redox. If this doesn't occur, then the reaction is non- redox.

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Answer:

c. 2 and 3 only

Explanation:

When you compact the bag of trash you make it smaller, so the volume changes. And the density is the mass divided by the volume, so as the volume changed the density obligatorily change too

A): The closest orbital to the nucleus, called the 1s orbital, can hold up to two electrons. This orbital is equivalent to the innermost electron shell of the Bohr model of the atom. It is called the 1s orbital because it is spherical around the nucleus. The 1s orbital is always filled before any other orbital.

Answer:

"Endothermic reaction: In an endothermic reaction, the products are higher in energy than the reactants. Therefore, the change in enthalpy is positive, and heat is absorbed from the surroundings of the reaction."

Explanation:

When enthalpy is positive and delta H is greater than zero, this means that a system absorbed heat. This is called an endothermic reaction. When enthalpy is negative and delta H is less than zero, this means that a system released heat. This is called an exothermic reaction.

The sign of q for an endothermic process is positive because the system is gaining heat. A chemical reaction or physical change is exothermic if heat is released by the system into the surroundings. Because the surroundings are gaining heat from the system, the temperature of the surroundings increases.

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Answer:

Any 3 of the following:

atmospheric science

environmental science

climate science

biology

astronomy

human physiology and medicine

Explanation:

Got it right on edge 23

Answer:

A

Explanation:

Its an acid.

Answer:

in most of the endothermic reactions the atoms gains electrons from one to another. since the atom gains electrons there is a electron repulsive force between the host and the guest electron . As stability is inversely proportional to electron repulsive force the atom gains energy to attain stability .

The endothermic reaction mostly come under electron affinity

Explanation:

hope this helps you

if  I am wrong just correct me

[tex]HELLO![/tex]

To completely describe an electron in an atom, four quantum numbers are needed:

                                          [tex]MiraculousAlejandra[/tex].

1 — Element D and A ( Which are Sodium and aluminium )

2 — ( 2 + 8 + 3 = 13 electrons total ) Element A Because it's atomic number is 13.

3 — Element E Is stable. ( Which is Argon )

( Note, Elements which has 8 election on its outermost cell is stable. ( Helium is exception which is a noble gas but have 2 electrons in outermost cell )

4 — Element F , which is hydrogen. ( Hydrogen is the only element to not have any neutron )

5 — Element D ( Which is sodium )

6 — The element F ( Which is hydrogen ) Don't contain any neutron.

________________________________

Answer:

ionic

Explanation:

I'll put the rest if the answers in comments

Answer:

1. Metallic bonds are responsible for many properties of metals, such as conductivity. Why is this possible?

*The bonds can shift because valence electrons are held loosely and move freely.*

2. Between which types of elements do ionic bonds occur, and how do electrons act within the bond?

*metals and nonmetals, electrons transferred*

3. Which kind of bond would occur between sodium (Na, Group IA) and chlorine (Cl, Group VIIA)?

*ionic*

4. Which type of bond and how many bonds would occur as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA?

*four covalent bonds*

5. How many covalent bonds is nitrogen (Group 5A) likely to form?

*three*

These are all the answers to the Bonds Quick Check.

Answer:

Explanation:

The moving part won't move on its own there's a force but the force isn't enough for something like a bike chain it need grease to move smoothly or else it will just be super stuck or slow.

Answer:

because grease produce more fiction which helps moving part of machine not get jamm while working

Answer:

The volume occupied by 2.34 grams of CO2 gas at STP   is 1.18  L

Answer:

Down vote

A saturated solution is at equilibrium (rate of dissolution is equal to rate of crystallization) with some equilibrium constant K1. If you change the temperature of the system at equilibrium, you will observe a different equilibrium constant K2. Whether the equilibrium constant increase or decreases is described by the Van't Hoff equation:

ln(K2K1)=−ΔHR(1T2−1T1)

So it depends on the sign of the enthalpy of reaction, in this case the enthalpy of dissolution.

Answer:

the earth is green because the green part is the plants and tree.

Answer:

The excess carbon dioxide in the atmosphere has created a greener planet,

Explanation:

Answer:

s

Explanation:

1- Wood

2-Moon

3-Pure water

4-Sand and water

5-Glass

6-Paper

7-Sun

8-Flashlights

9-Glass or polished metal

If you don't like my examples then sorry

Answer:

v2 = u2 + 2as

it is the correct answer

Answer:(b)liquid water is correct option . Because it is a molecular solid and molecular solid has weak interparticle forces of attraction

Explanation:

Answer:

Ka is also known as Acid dissociation constant. It is the equilibrium constant of the dissociation reaction of an acid and is denoted by Ka.

Explanation:

Ka is a measure of acid strength. A larger equilibrium constant means that the reaction has a greater tendency to drive towards the products side ( more H2O- and A- Less HA). Another way of saying this is that the acid has a stronger tendency to donate it's H+ which is the definition of a stronger acid.

Answer:

The first person to go to the moon

Explanation:

Neil Armstrong was the first person !

heres more info on NASAs page!

https://www.nasa.gov/audience/forstudents/k-4/stories/first-person-on-moon.html