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Thepotemich [5.8K]
3 years ago
13

Stuck stupid science homework. anyone know answers?

Chemistry
1 answer:
Veronika [31]3 years ago
7 0
The charge of a Rb ion would be +1
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A sample of a compound contains only the elements sodium, sulfur, and oxygen. it is found by analysis to contain 0.979 g na, 1.3
Aloiza [94]
To determine the empirical formula for the compound that contains <span>0.979 g Na, 1.365 g S, and 1.021 g O, we convert these to mole units. The molar masses to be used are:

Molar mass of Na = 23 g/mol
</span>Molar mass of S = 32 g/mol
Molar mass of O = 16 g/ mol

The number of moles is obtained using the molar mass for each element.

moles Na = 0.979 g Na/ 23 g/mol Na = 0.04256
moles S = 1.365 g Na/ 32 g/mol Na = 0.04265
moles O = 1.021 g O/ 16 g/mol Na = 0.06326

We then divide each with the smallest number of moles obtained. 

Na: 0.04256/ 0.04256 = 1 
S: 0.04265/ 0.04256 = 1.002 ≈ 1
O: 0.06326/ 0.04256 = 1.49 ≈ 1.5

We then have an empirical formula of NaSO₁.₅. However, chemical formulas must have only integers as subscripts, thus, we multiply each to 2. The empirical formula is then Na₂S₂O₃ also known as sodium thiosulfate.
4 0
3 years ago
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According to one acid- base theory, an acid is an?
alexgriva [62]

The Arrhenius theory defines an acid as a compound that can dissociate in water to yield hydrogen ions, H+, and a base as a compound that can dissociate in water to yield hydroxide ions, OH− 

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3 years ago
Which phrase best describes electronegativity?(1 point)
frez [133]

Answer:

ELECTRONEGATIVITY is the tendency of an atom in the molecule to attract the bonded pair of electrons .

Explanation:

it might help you!!!!!!

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3 years ago
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Use the IUPAC nomenclature rules to give the name for this compound - Ca2S3.
valkas [14]

According to IUPAC nomenclature the cation is named first followed by name of anion

in the given compound the cation is calcium  (Ca^+2)

The anion is sulphide (S^-2)

So the name of the given compound will be Calcium shulphide


5 0
4 years ago
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What is the oxidation number of HCLO4?
ki77a [65]
E.g. in H3PO4 (O, -2).
8. The sum of the oxidation states of all the atoms in a species must be equal to net charge on the species. e.g. Net Charge of HClO4 = 0, i.e. [+1(H)+7(Cl)-2<span>*4(O)] = 0.</span>
4 0
3 years ago
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