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2 years ago

Choose the write Lewis electron dot diagram for an atom of boron

Chemistry

2 answers:

Alja [10]2 years ago

8 0

Answer:

B is the correct diagram.

Explanation:

To determine this answer, we can use the number of valence electrons that boron has. Since it is in group 3 of the periodic table, the Lewis dot diagram will need to have 3 dots around it, representing the 3 valence electrons. Therefore, the only diagram with 3 dots is the second one, making it the correct choice.

Solnce55 [7]2 years ago

4 0

The correctly drawn lewis structure for boron is B! To draw the lewis dot structure, you need to find the number of valance electrons (boron has 3) and then put a dot for each valance electron around the symbol for the atom. However, instead of putting three in different rings you're going to smush two together, so it has some sort of stability shown.

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A hot air balloon can have a volume of 2950 cubic meters (2.95 ✕ 106 liters) and operate at temperatures up to 250°F (121°C). As

TiliK225 [7]

Answer:

2.64 × 10⁶ g

Explanation:

We can find the mass of air using the ideal gas equation.

$P.V=n.R.T=\frac{m}{M} .R.T$

where,

P is the pressure (P = 1.00 atm)

V is the volume (V = 2.95 × 10⁶ L)

n is the number of moles

R is the ideal gas constant (0.08206atm.L/mol.K)

T is the absolute temperature (121°C + 273 = 394 K)

m is the mass

M is the molar mass (28.09 g/mol)

$m=\frac{P.V.M}{R.T} =\frac{1.00atm \times 2.95 \times 10^{6} L \times 28.97g/mol}{(0.08206atm.L/mol.K) \times 394 K } =2.64 \times 10^{6} g$

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2 years ago

How many atoms are in 54.6 grams of nickel

sergij07 [2.7K]

5.60*10²³ is the answer First you find the molar mass of nickel then you you turn grams to moles to atoms and boom there's your answer.

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3 years ago

How many kilojoules is 1,500,000 calories

pochemuha

Answer:

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AleksAgata [21]

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