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3 years ago

What is meant by hydrogen bond

2 answers:

5 0

Hydrogen bonding, interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces.

makvit [3.9K]3 years ago

3 0

Answer:

The attraction between two atoms that already participate in other chemical bonds is a hydrogen bond

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I need help with 17,18,19,& 21

valentinak56 [21]

Answer:

17. tie hair up

wear goggles

18. i don't know

19. you light it on the side of the box

20. it should be orange because that is the safest.

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3 0

3 years ago

what is the point of intersection when the system of equations below is graphed on the coordinate plane -x+y=4 6x+y=-3

Ilia_Sergeevich [38]

Answer:

POINTS OF INTERSECTION ARE:

x = -1

y = 3

coordinates : (-1,3)

Coordinates :

Explanation:

Condition for intersecting lines

$\frac{a_{1}}{a_{2}}\neq\frac{b_{1}}{b_{2}}$

here

a1 ,a2 = coefficients of x (a1 = -1 , a2 = 6)

b1 ,b2 = coefficients of y(b1 = 1 , b2 = 1)

$frac{-1}{6}\neq\frac{1}{1}\neq\frac{1}{1}$

Calculation :

Here substitution method is used : Value of y from eq (1) is substitued in equation (2)

-x + y = 4

y = 4 + x.............(i)

put value of x in equation (2)

6x + y = -3

6x + 4 + x = -3 ( from i)

7x = -3 - 4

7x = -7

x = $frac{-7}{7}$

x = -1

using equation(i)

y = 4 + (-1)

y = 4 - 1

y = 3

Check:

The values of x and y should satisfy equation (1) and (2)

for equation 1

-x+y =4

= -(-1) + 3

= 1 + 3

= 4

Hence coordinates satisfy equation 1

5 0

3 years ago

What is the composition and structure of ionic compounds

kvv77 [185]

Answer:

Sodium and chlorine ions come together to form sodium chloride or NaCl. The sodium atom in this compound loses an electron to become Na+, while the chlorine atom gains an electron to become Cl-. Together, they form a neutral compound because the ions balance each other out.

Explanation:

6 0

3 years ago

a solution is to be prepared with a sodium ion concentration of 0.555 mol/l. what mass of sodium sulfate (g) is needed to prepar

seraphim [82]

Mass of sodium sulfate (g) is needed to prepare 2.00 liters of such a solution is 78.122.

Sodium Sulfate $=N a_2 \mathrm{So}_4$.$

$[\mathrm{Na}+]=0.555 \mathrm{mo} / / \mathrm{L}$

$\mathrm{mol} \mathrm{Nat}=0.555 \times2 =1.11 \mathrm{~mol}$

mol $\mathrm{Nu}_2 \mathrm{Su}_4=\frac{1.11}{2}=0.55 \mathrm{~mol}$.$

mol $\mathrm{Na}_2 \mathrm{So}_4=m_0 \times m \omega$ = 0.55 *142.04=78.122.

Drying organic liquids uses sodium sulphate. in powdered household laundry detergents as a filler. to eliminate minute air bubbles from molten glass as a fining agent. The decahydrate form of Glauber's salt is used as a laxative to eliminate medicines like acetaminophen from the body. The inorganic substance sodium sulfate and numerous related hydrates have the formula Na2SO4. White solids in all of their forms, they are very soluble in water. The decahydrate is a significant commodity chemical product, with a 6 million tonne yearly production.

To learn more about sodium sulfate visit:brainly.com/question/4025301

#SPJ4

3 0

1 year ago

Forty litres of a mixture of methane and nitrogen requires 24 L of pure oxygen for complete combustion. The percentage of methan

Marat540 [252]

Answer:

$\boxed{30 \, \%}$

Explanation:

We can use Gay-Lussac's Law of Combining Volumes to solve this problem.

Gases at the same temperature and pressure react in the same ratios as their coefficients in the balanced equation.

1. Write the chemical equation.

Ratio: 1 L 2 L

CH₄ + 2O₂ → CO₂ + 2H₂O

V/L: 24

2. Calculate the volume of O₂.

According to Gay-Lussac, 1 L of CH₄ reacts with 2 L of O₂.

Then, the conversion factor is (1 L CH₄/2 L O₂).

$\text{Volume of CH}_{4} = \text{24 L O}_{2} \times \dfrac{ \text{1 L CH}_{4} }{\text{ 2 L O}_{2}}= \text{12 L CH}_{4}$

3. Calculate the percentage of methane

$\text{\% Methane } = \dfrac{\text{12 L}}{\text{40 L}} \times 100 \%= \mathbf{30 \, \%} \\\\\text{The percentage of methane in the mixture is }\boxed{\mathbf{30 \, \%}}}$

4 0

3 years ago

What is meant by hydrogen bond​

What is meant by hydrogen bond