Based on your knowledge of chemical equations, what do you know for sure
about this equation?


Pls help I need it I’m dumb but I do need it! *here a pic*

Answer:

Yes, a cooking egg is a chemical change! Water is evaporated from the egg and the egg changes composition. You might say that raw egg and water are the reactants and cooked egg and water vapor are the reactants.

Explanation:

Frying an egg is an example of a chemical change.

A chemical change refers to a kind of irreversible change. In this type of change, the element that undergoes a transformation cannot be returned to its original state.

This is the case with an egg which when fried cannot be returned to its original liquid state. So, unlike a physical change tha can be reversed, a chemical change is irreversible.

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Answer:

Liquids take on the shape of their container. The liquid state of matter is an intermediate phase between solid and gas. Like the particles of a solid, particles in a liquid are subject to intermolecular attraction; however, liquid particles have more space between them, so they are not fixed in position.

Explanation:

Answer:

A represents London dispersion forces, and B represents hydrogen bonding.

Explanation:

The Intermolecular force between two non polar molecules will be weaker London-dispersion forces. The bond between a hydrogen containing molecule with another molecule of an electronegative atom such as O, N etc. is hydrogen bond.

Intermolecular forces are forces between two molecules that bind them together. The force of attraction is generated by sharing of electrons or by donation of electrons.

Non-polar molecules are those with no charge separation. But when two non-polar molecules comes in contact a temporary dipole will create there and they attract each by the opposite charge ends. This type of force is called London dispersion force.

One molecule with a hydrogen atom is able to form a hydrogen bond with an electronegative atom of another molecule due to the electronegativity difference between hydrogen atom and atoms like N, O, F etc.

Therefore, the intermolecular force A is London-dispersion force and B is hydrogen bonding. Hence, option A is correct.

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Answer:

Na₂SiO₃

Explanation:

Answer:

Option B is correct = 1,3

Explanation:

Chemical equation:

C₂H₄ + O₂     →    CO₂ + H₂O

Balanced chemical equation:

C₂H₄ + 3O₂     →    2CO₂ + 2H₂O

Step 1:

Left side                      Right side

C = 2                           C = 1

H = 4                           O = 3

O = 2                           H = 2

Step 2:

C₂H₄ + O₂     →    2CO₂ + H₂O

Left side                      Right side

C = 2                           C = 2

H = 4                           O = 5

O = 2                           H = 2

Step 3:

C₂H₄ + O₂     →    2CO₂ + 2H₂O

Left side                      Right side

C = 2                           C = 2

H = 4                           O = 6

O = 2                           H = 4

Step 4:

C₂H₄ + 3O₂     →    2CO₂ + 2H₂O

Left side                      Right side

C = 2                           C = 2

H = 4                           O = 6

O = 6                           H = 4

16

protons

18

neutrons

16

electrons

Right from the start, you know that you're indeed dealing with a neutral atom, since the number of protons it has in its nucleus is equal to the number of electrons it has surrounding its nucleus.

Now, an atom's atomic number,  

Z

, tells you how many protons it has in its nucleus. Nothing more, nothing less.

In your case, you are told that the atom contains  

16

protons in its nucleus, which means that  

Z

will be equal to

Z

=

16

A quick look in the periodic table will reveal that you're dealing with an atom of sulfur,  

S

.

An atom's mass number,  

A

, tells you how many protons and neutrons it contains in its nucleus. Since the number of protons is given by  

Z

, you can say that

A

=

Z

+

no. of neutrons

In your case, the atom contains  

18

neutrons in its nucleus. This means that  

A

will be equal to

A

=

16

+

18

=

34

Finally, focus on the atom's electron configuration, which you know that must account for a total of  

16

electrons.

S:  

1

s

2

2

s

2

2

p

6

3

s

2

3

p

4

Its noble gas shorthand notation, which uses the electron configuration of neon,  

Ne

, the noble gas that comes before sulfur in the periodic table, will look like this

S:  

[

Ne

]

3

s

2

3

p

4

Answer:

Is there a question you need help with?

Answer:

cancerous

Explanation:

Answer:

boiiiiiiiiiii

Explanation:

Answer:

white

Explanation:

Answer:

This is because earth is at a tilt, and the tilt is the cause of all seasons. In winter, we are the furthest from the sun due to the tilt.

Explanation:

Answer:

2.cohesion 3.adhesion 4. polar molecule 5. changing states 6. condensation 7.capilary action 8.adhesion 9. changing state 10. evaporation

Answer:

For a material to be considered as building material, it should have required engineering properties suitable for construction works. These properties of building materials are responsible for its quality and capacity and helps to decide applications of these material. Such properties of building materials are categorized as follows. 1. Physical properties 2. Mechanical properties 3. Chemical properties 4. Electrical properties 5. Magnetic properties 6. Thermal properties

Explanation:

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

N = 9.02 × 10^25 molecules of HCI

We have

[tex]n = \frac{9.02 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 149.83388704...[/tex]

We have the final answer as

Hope this helps you

Answer:

A.  gases only

Explanation:

It is only in gases that the particles are very far apart so they can fill their contains.

There are four major states of matter which solid, liquid, gases and plasma.

So, option A is the perfect answer.

Answer:

Either A or D

But i think D

hope this helps =3

sorry if im wrong

Answer:

i think but i am not sure but according to me it mainly reacts yo non metals and i think its very reactive if my answer is wrong then comment below this question i will see it and i will get an opportunity to learn something new

Answer:

This is not a question

Explanation:

no

Answer:

If the cart accelerates at 3.5m/s2, what is the net external force exerted by the vendor? Given: Solution: m= 13kg F=ma a= 3.5m/s2 =13kg x 3.5m/s2 Find: =45.5kg*m/s2 or 45.5 N Fnet The net force exerted by the vendor was 45.5N. 4. 2.

Explanation:

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Answer:

c. Endothermic

Explanation:

endothermic reactions absorb heat, exothermic reactions release heat.

Answer:

Valence electrons are the electrons on the outermost energy level of an

atom.

The correct answer will be Valence electrons are the electrons on the outermost energy level of an atom.

Answer: Robert Millikan

Explanation: Robert Millikan was the first person to perform the oil drop experiment. It was done many centuries ago. Hope this helps you!

Answer:

Assume that the coffee has the same density, 0.997 g/mL ... One liter of water has a mass of 1 kg and a specific heat of 4.184 J/(g °C).

Explanation:

The density in kg/m³ = 1.14 x 10⁴

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of density  

The unit of density can be expressed in g/cm³ or kg/m³  

Density formula:  

[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]

ρ = density , g/cm³ or kg/m³  

m = mass  , g or kg

v = volume  , cm³ or m³  

A density of Lead : ρ = 11.4 g/cm³

the density in kg/m³ :

[tex]\tt 11.4~\dfrac{g}{cm^3}\times \dfrac{kg}{10^3~g}\times \dfrac{cm^3}{10^{-6}~m^3}=\boxed{\bold{1.14\times 10^4~\dfrac{kg}{m^3}}}[/tex]

Answer:

14.0 g

Explanation:

nnandff

The mass in grams of sodium chloride must be added to make 400 mL of a 0.600 M sodium chloride is 14 grams.

Mass of any substance will be calculated by using their moles as:
n = W/M, where

W = required mass

M = molar mass

Also we know that, molarity of any solution is define as the number of moles of solute present in per liter of the solution.

M = n/V, where

M = molarity of NaCl = 0.600M

V = Volume of solution = 400mL = 0.4L

n = (0.6)(0.4) = 0.24moles

Now mass of NaCl will be calculated by using the first equation as:

W = (0.24mol)(58.44g/mol) = 14grams

Hence required mass of NaCl is 14 grams.

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[tex]\sqrt[n]{x} \int\limits^a_b {x} \, dx \geq x^{2} \sqrt{x} \neq \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \pi \sqrt[n]{x} \frac{x}{y} \alpha \beta x_{123} \\ \leq \left \{ {{y=2} \atop {x=2}} \right. \int\limits^a_b {x} \, dx \int\limits^a_b {x} \, dx \geq \geq \geq \geq x^{2} x^{2} x^{2} \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\rig[/tex]