PLEASE HELP!!!
i’m tried and i wanna go to sleep‍♀️

Answer:

C-C

A carbon has 4 valence electrons meaning it can share 4 electrons and is in short of 4 electrons to fill it outer energy shell making it 8. Which results to 2 double covalent bonds ,meaning there was a sharing of 2(4) = 8 electrons . Hope this helps . Your statement above is true .

Answer:

c

Explanation:

Answer:

the 3rd option is correct I promise

Explanation:

matter can not be created or destroyed no matter what, most important rule is chemistry

Answer:

1. Atoms

3. Electrons

4. 3 pairs

5. Complete transfer of electrons

6. London dispersion forces

7. Energy

Explanation:

Atoms are the building block from which a compound is formed so we can say that composition of compounds depends on type of atoms. Electrons are shared unequally in a polar bond due to difference in electronegativity values of bonded atoms. There are 3 pairs of electrons are shared in nitrogen molecule. The transfer of electrons occurs from one atom to another in the formation of ionic bonds. London dispersion forces are the intermolecular forces that is responsible for the low melting and boiling points of a molecule or compound. Energy is needed to break the bonds that is present between the two bonded atoms.

Answer:

24

Explanation:

Answer:

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Answer:

AgNO₃ will be the limiting reagent.

Explanation:

The balanced reaction is:

AgNO₃ + Li → LiNO₃ + Ag

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate:

To determine the limiting reagent, you can use a simple rule of three as follows: if by stoichiometry [tex]moles of AgNO_{3} =\frac{0.35 moles of Li*1 mole of AgNO_{3}}{1 mole of Li}[/tex]AgNO₃, how much moles of AgNO₃ will be needed if 0.35 moles of Li react?

moles of AgNO₃= 0.35

But 0.35 moles of AgNO₃ are not available, 0.30 moles are available. Since you have less moles than you need to react with 0.35 moles of Li, AgNO₃ will be the limiting reagent.

Answer:

it shouuld be the third one down c

Explanation:

Answer: Maybe, It could be a good and bad idea.

Explanation:

This is beacuse Metal does not absorb and can block sunlight.

Ka = [H+] [X-] ÷ [HX] is the acid dissociation constant for an acid at equilibrium.

Chemical equilibrium is the condition in which no net change in the amounts of reactants and products occurs.

HX(aq) ↔ H+(aq) + X-(aq)

[H+] = [X-]

Ka = [H+] [X-] ÷ [HX]

Hence, Ka = [H+] [X-] ÷ [HX] is the acid dissociation constant for acid at equilibrium.

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Answer:

Oceanic crust is generally composed of dark-colored rocks called basalt and gabbro. It is thinner and denser than continental crust, which is made of light-colored rocks called andesite and granite. The low density of continental crust causes it to “float” high atop the viscous mantle, forming dry land.

Explanation:

Answer:

Li3N

Explanation:

Lithium nitride is a compound with the formula Li₃N

Hope this helped!!!

Answer:

C

the next answer is B

the next one is C

Explanation:

Answer:

157.64 L

Explanation:

We'll begin by converting 30 °C to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

T(°C) = 30 °C

T(K) = 30 °C + 273

T (K) = 303 K

Next, we shall convert 600 mmHg to atm. This can be obtained as follow:

760 mmHg = 1 atm

Therefore,

600 mmHg = 600 mmHg × 1 atm / 760 mmHg

600 mmHg = 0.789 atm

Finally, we shall determine the volume of the gas. This can be obtained as follow:

Number of mole (n) = 5 moles

Temperature (T) = 303 K

Pressure (P) = 0.789 atm

Gas constant (R) = 0.0821 atm.L/Kmol

Volume (V) =?

PV = nRT

0.789 × V = 5 × 0.0821 × 303

0.789 × V = 124.3815

Divide both side by 0.789

V = 124.3815 / 0.789

V = 157.64 L

Therefore, the volume of the gas is 157.64 L

Answer:

c i guess, decrease temperature

Answer:

Fact

Explanation:

Answer:

linear

Explanation:

.....................…...…

Explanation:

bent with an H-0-H angle if 104.5°

Answer:

Zn is the excess reagent

Explanation:

Answer:

One mole of NaCl contains 6.022 x 1023 NaCl formula units.....

Answer and Explanation:

(17.55 mol) × (6.02214 × 10^23 f.u./mol) = 1.057 × 10^25 formula units

Answer:

This heat requirement we can calculate by following relationship..

Q = m*C*∆T

We have, m = 2gm, C = 1 cal/g-degC, ∆T = 2 degC

Putting all these values in above equation we get

Q= 2*1*2 = 4 cal

Answer:

2(C4H10)+13(O2)->8(CO2)+[](H20)

Explanation:

sorry i couldn’t get the last one

The chemical reaction by providing the correct whole number coefficients: number coefficients will be 2C4H10 + 13O2 WILL GIVE 8CO2 + 10H2O .this will be the balanced reaction.

Balance elements in the equation other than O and H. Balance the oxygen atoms by adding the appropriate number of water ( H 2O) molecules to the opposite side of the equation.

Balance the hydrogen atoms (including those added in step 2 to balance the oxygen atom) by adding H + ions to the opposite side of the equation.

When writing an equation for a chemical reaction, the two sides of the equation should balance and need the same number of each kind of element on both sides.

Therefore the given chemical equation is balanced in the following form, 2C4H10 + 13O2 WILL GIVE 8CO2 + 10H2O

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Answer:c

Explanation:

Answer:

Explanation:

Sacrificial protection is a corrosion protection method in which a more electrochemically active metal is electrically attached to a less active metal. The highly active metal donates electrons to replace those which may have been lost during oxidation of the protected metal.

Electroplating is a general name for processes that create a metal coating on a solid substrate through the reduction of cations of that metal by means of a direct electric current. The part to be coated acts as the cathode (negative electrode) of an electrolytic cell; the electrolyte is a solution of a salt of the metal to be coated; and the anode (positive electrode) is usually either a block of that metal, or of some inert conductive material. The current is provided by an external power supply.

Answer:

42 mol

Explanation:

In the problem there are 4 mols of O in the parenthesis but you multiply by 3 since there are 3 moles of SO4, you them times this by 3.5 since there are 3.5 mols of the entire substance.

Answer:

its c

Explanation:

i took the test and got a 100

Assuming that the trends continue, sodium chloride compound will have the greatest solubility at 120 ℃.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Answer and Explanation:

N2H2 + H2O2 = N2 + 2 H2O  2.7747 moles of HOOH (hydrogen peroxide)=5.5494 moles of H2O  

Answer:

Fe2S3

Explanation:

Answer:

Fe2S3

Explanation:

As, the ionic valency of Iron (Fe) that is + 3 interchanges with the ionic valency of Sulphide that is - 2 to form-

Fe2S3

Answer:

A

Explanation:

Answer:

the answer is A

Explanation:

The base increases Hydroxide ions in a solution e.g NaOH

Answer:

A

Explanation: