The anion of which element has a –1 charge?

1 answer:

6 0

An anion is a negatively charged ion. An element can become an anion if it takes an extra electron such that it has one more electron than protons.
Atoms would preferentially taken an extra electron so that it can have a full octet and be more stable.

$\sf Cl^-, Br^-, F^-$ are some of the few elements that would have a -1 charge.

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Why are fixed resistors’ values indicated by color bands rather than printing the numeric value on their exterior?

gladu [14]

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True [87]

Answer:

0.479 M or mol/L

Explanation:

So Molarity is moles/litres of solution...often written as M=mol/L

So here we are given grams of BaCl2 which we have to convert to moles. To convert to moles of BaCl2 we have to divide 63.2 g BaCl2 by molar mass of BaCl2 which is 208.23 g/mol so you get 63.2/208.23 = 0.3035 moles of BaCl2

Second step is converting the 634mL to litres by simply dividing by 1000 because we know 1 litre has 1000ml so 634/1000 = 0.634L

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3 0

2 years ago

Read 2 more answers

How many moles of chlorine (Cl) atoms are in a sample of 1.72 × 1022 atoms? 0.0286 mol Cl 35.0 mol Cl 1.03 × 1023 mol Cl 1.04 ×

kogti [31]

Given information : Sample of $1.72\times 10^{22} atoms$

We need to find the moles of Chlorine in the given sample.

We can say that we need to find moles from the given atoms.

Relation between mole and atom is given by : $1 mole = 6.022\times 10^{23} atoms$

Where $6.022\times 10^{23}$ is Avogadro number.

$1.72\times 10^{22} atoms\times \frac{1 mole}{6.022\times 10^{23} atoms}$

$1.72\times 10^{22}\times \frac{1 mole}{6.022\times 10^{23}}$

On solving the above equation , atoms(unit) gets cancelled out and we get 0.0286 mol.

In the given sample the moles of Chlorine (Cl) is 0.0286 mol , so option A is correct.

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3 years ago

Consider the complete reaction of 43.0 g of silicon with excess nitrogen gas in the reaction shown below. What mass of product f

kupik [55]

The answer to your question is : no.of moles of Si = 43/atomic mass of Si = 43/28.1 = 1.53

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so 1.53 mole of Si will give 1.53/3 = 0.51 mole of Si3N4

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it means that 1 mole of Si3N4 = 140.28 g

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3 years ago

Calculate the volume of 8.87×10-2 M calcium hydroxide required to neutralize 15.0 mL of a 0.389 M hydrobromic acid solution. mL

Arte-miy333 [17]

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Explanation :

Using neutralization law,

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