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3 years ago

Examine the Lewis structure.

Chemistry

2 answers:

xz_007 [3.2K]3 years ago

8 0

Answer:

The middle hydrogen is bonded to 2

elements.

Each hydrogen must be bonded to one element which is oxygen

valina [46]3 years ago

6 0

Answer:

A, C, & D on edge!

Explanation:

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In a polyatomic ion, the -ate ending indicates one ____ oxygen than the -ite ending. A. more B. cannot be determined C. less D.

Aneli [31]

Correct answer is A: more :)

4 0

3 years ago

Endothermic creatures maintain fairly consistent body temperatures. Ectothermic creatures do not. What are the best synonyms for

Ghella [55]

Endothermic- endothermal, heat absorbing
Ectothermic- exothermal exoergic energy releasing, heat releasing

4 0

4 years ago

Unheated

kumpel [21]

Explanation:

Using the Combined Gas Law, which is:

$\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}$

(With $P_1,V_1,T_1$ being initial pressure, volume and temperature; and

$P_2,V_2,T_2$ being the new values)

We can move the units around in order to solve for $P_2$ , which would look like this:

$P_{2} =\frac{P_1V_1T_2}{V_2T_1}$

Then we convert the Celsius temperature to Kelvin:

$25$ ° $C$ = $289$ $K$

$100$ ° $C$ = $373$ $K$

And now, we plug in all of the values and solve, with volume remaining as a constant:

$P_{2} =\frac{(1.00 atm) (20.0 L) (373 K)}{(20.0 L) (298 K)}$ $=$

$1.25$ $atm$ or  $127$ $kPa$

7 0

4 years ago

The electronegativity values of carbon, hydrogen, and nitrogen are compared in the table.

Fofino [41]

Answer:

C. CH₄ is less than NH₃ because the NH bond is more polar than the CH bond

Explanation:

The intermolecular forces between ammonia is far stronger than for methane. Between the molecules of ammonia we have the presence of hydrogen bonds. This bond is absent in methane.

Hydrogen bonds are one of the strongest intermolecular forces. It is as a result of the electrostatic attraction between the hydrogen atom of one molecule and the electronegative atom N, O and F of another molecule.

This strong interaction is absent in methane which has just dipole - dipole attraction.

The strength of the hydrogen bond depends on the electronegativity of the combining atoms.

5 0

3 years ago

A sample of 211 g of iron (III) bromide is reacted with

Alisiya [41]

FeBr₃ ⇒ limiting reactant

mol NaBr = 1.428

<h3>Further explanation</h3>

Reaction

2FeBr₃ + 3Na₂S → Fe₂S₃ + 6NaBr

Limiting reactant⇒ smaller ratio (mol divide by coefficient reaction)

FeBr₃

211 g of Iron (III) bromide(MW=295,56 g/mol), so mol FeBr₃ :

$\tt n=\dfrac{mass}{MW}\\\\n=\dfrac{211}{295,56}\\\\n=0.714$

Na₂S

186 g of Sodium sulfide(MW=78,0452 g/mol), so mol Na₂S :

$\tt n=\dfrac{186}{78.0452}=2.38$

Coefficient ratio from the equation FeBr₃ : Na₂S = 2 : 3, so mol ratio :

$\tt FeBr_3\div Na_2S=\dfrac{0.714}{2}\div \dfrac{2.38}{3}=0.357\div 0.793$

So FeBr₃ as a limiting reactant(smaller ratio)

mol NaBr based on limiting reactant (FeBr₃) :

$\tt \dfrac{6}{3}\times 0.714=1.428$

6 0

3 years ago