By what two characteristics are all the elements of the periodic table placed in a particular row and column

1 answer:

7 0

<span>Rows are defined as which shell of the element contains the outermost electrons. As the rows increase, the outermost shell value increases, as well. The columns are defined as which block contains those outermost electrons, and the shape at which that orbital takes.</span>

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Which element or ion listed below has the electron configuration 1s22s22p6?

Anna11 [10]

Count up the number of electrons in each orbital. theres ten electrons which means it has 10 protons. the element would be neon

7 0

3 years ago

How many moles of Calcium Oxide are needed to produce 4 moles of Calcium Hydroxide?

Tpy6a [65]

Taking into account the reaction stoichiometry, 2 moles of CaO are required to react with 2 moles of Ca(OH)₂.

<h3>Reaction stoichiometry</h3>

In first place, the balanced reaction is:

CaO + H₂O → Ca(OH)₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

CaO: 1 mole
H₂O: 1 mole
Ca(OH)₂: 1 mole

<h3>Moles of CaO required</h3>

The following rule of three can be applied: If by stoichiometric reaction 1 mole of Ca(OH)₂ is produced by 1 mole of CaO, 2 moles of Ca(OH)₂ are produced by how many moles of CaO?

$moles of CaO=\frac{2 moles of Ca(OH)_{2}x1 mol of CaO }{1 mole of Ca(OH)_{2}}$

moles of CaO= 2 moles

Finally, 2 moles of CaO are required to react with 2 moles of Ca(OH)₂.

Learn more about the reaction stoichiometry:

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5 0

2 years ago

PLEASE ANSWER THIS QUESTION FAST :(

kramer

Mol sulfuric acid = 19 g * (1 mol) / (98.1 g) = 0.19367 mol
mol H2O = 0.19367 mol H2SO4 * (2 H2O) / (1 H2SO4)
= 0.387359 mol H2O
grams H2O = 0.387359 mol H2O * (18 g)/(1 mol)
= 6.97 g
The answer is 7.0 grams of water

6 0

3 years ago

What is the pH of a solution with a [H+] of 1.0 x 10-4 M?

MaRussiya [10]

PH = -log [H+]
pH = -log (1.0x10^-4) = -(-4) = 4 or A

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3 years ago

In order to predict whether or not a single replacement reaction takes place you need to consult a chart that shows the

erastova [34]

<span>Activity series of metals. it is a series of metals based on their reactivity from highest to lowest. Potassium occupies the top most level of reactivity. The reactivity means the ability to displace hydrogen gas from water and acid solutions.</span>

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3 years ago