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3 years ago

Does “valence electrons” have a charge?

Chemistry

1 answer:

Alborosie3 years ago

6 0

Answer:

Yes, negative

Explanation:

Yes, electrons have negative charge. "Valence electrons" means the electrons of the outer shell, but as electrons the charge is negative

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Using the Lewis dot Symbol Illustrate how the atoms are bonded in each of the following ionic compounds; thanks

Gre4nikov [31]

I’m not really sure but i think it’s 2.

6 0

3 years ago

Which of the following correctly describes a lewis dot structure for oxygen?

Bezzdna [24]

A Lewis dot structure would of oxygen looks like this:

I hope this helps!
~cupcake

5 0

3 years ago

2. Calculate the concentration (in molarity) of a NaOH solution if 25.0 mL of the solution are needed to neutralize 17.4 mL of a

zimovet [89]

Answer:

0.217 M NaOH

Explanation:

M1V1 = M2V2

M1 = 0.312 M HCl

V1 = 17.4 mL HCl

M2 = ?

V2 = 25.0 mL NaOH

Solve for M2 --> M2 = M1V1/V2

M2 = (0.312 M)(17.4 mL) / (25.0 mL) = 0.217 M NaOH

3 0

3 years ago

How much energy must be added to a 1 kg piece of gold with a specific heat of 130 j/kg to increase its temperature from 20 c to

Lorico [155]

$Q = 10.4 \; \text{kJ}$

The specific heat of a material gives the energy it takes to increase the temperature of one unit mass of the material by one unit temperature. The SI unit for specific heat $c$ is therefore $\text{J} /\text{kg} \cdot \textdegree{\text{C}}$ .

The formula relating the energy required to raise the temperature of $m$ grams of a substance with specific energy $c$ by $\Delta T$ degrees is

$Q= c \cdot m \cdot \Delta T$

The question provides the following information:

$c = 130\; \text{J} /\text{kg} \cdot \textdegree{\text{C}}$ for gold
$m= 1 \; \text{kg}$
$\Delta T = 100 \textdegree{\text{C}} - 20 \textdegree{\text{C}} = 80 \textdegree{\text{C}}$

Apply the formula:

$\begin{array}{ccc} Q & = & c \cdot m \cdot \Delta T\\ & = & 130 \; \text{J} \cdot \text{kg}^{-1} \cdot \textdegree{\text{C}}^{-1} \times 1 \; \text{kg} \times 80 \; \textdegree{\text{C}}\\ & = & 1.04 \times 10^{4} \;\text{J}\\ & = & 10.4 \; \text {kJ} \end{array}$

7 0

4 years ago

Boiling Point is the __________. *

sergiy2304 [10]

Boiling point is the temperature at which a liquid boils and turns to a gas.

Hope this helps!! (:

7 0

3 years ago