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aev [14]
3 years ago
12

Please help with 1 chemistry question thank you!

Chemistry
1 answer:
ale4655 [162]3 years ago
7 0
Here are the CORRECT names and molecular formulas

carbonate: CO_3^{2-}
bicarbonate: HCO_3^{-}

Choice 1 is incorrect

nitrite: NO_2^{-}
nitrate: NO_3^{-}

Choice 2 is incorrect

sulfite: SO_3^{2-}
sulfide: S^{2-}

Choice 3 is incorrect

By process of elimination, you can infer choice 4 is correct.

Actually, choice 4 is the only choice that displays the correct name and formula.

Have an awesome day! :)
You might be interested in
“Representative elements”? Which groups of the periodic table contain the “representative elements”?
Phoenix [80]

S- and P-Block elements are known as Representative elements.

Groups 1-2 and Groups 13-18

4 0
2 years ago
1. a) Anthony and Joseph create a start up company to make batteries for electric cars. Iron(III) phosphate is needed to create
Elenna [48]

Answer:

 LR is Na₃PO₄  

Explanation:

A quick way to determine the limiting reactant in a process is to convert reactant values to moles and then divide by the respective coefficient of the balanced equation. The smaller number of the division is the limiting reactant. For the given reaction, the rxn ratio of reactants is 1:1 so only the smaller mole value gives limiting reactant. However, if the reaction is NOT 1:1 the one must divide by respective coefficient to identify the smallest value and the limiting reactant.

This problem:

                          FeCl3(aq)          +    Na3PO4(aq)   => FePO4(s) + 3 NaCl(aq)

Given:                  27.8g                          61.9g

moles:        27.8g/162.2g/mole      1.9g/163.94g/mole

                    = 0.1714 mole               = 0.0116 mole

÷ coef.         => 0.1714/1 = 0.1714      => 0.0116/1 = 0.0116

smaller value is LR => =>  =>  =>  => => LR is Na₃PO₄              

Hope this helps. Doc :-)    

3 0
3 years ago
15 Points. Pls give a real answer this is due in an hour.
bonufazy [111]

Answer:

This tells us that for every 2 moles of potassium chlorate that are decomposed, then 3 moles of oxygen gas is produced.

7 0
3 years ago
An egg sinks in fresh water but it floats on salty water.why?​
Sonbull [250]
The salt makes it rise and
8 0
3 years ago
In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B. 2 A ⟶ 3 B How many molecules
Harman [31]

Answer:

There will be produced 1.71 moles of B which contain 1.03×10²⁴ molecules

Explanation:

The example reaction is:

2A → 3B

2 moles of A produce 3 moles of B

If we have the mass of A, we convert it to moles and then, we make the rule of three: 29.2 g / 25.6g/mol = 1.14 moles

Therefore 2 moles of A produce 3 moles of B

1.14 moles of A will produce (1.14 . 3) / 2 = 1.71 moles of B are produced

Now we can determine, the number of molecules

1 mol has NA molecules (6.02×10²³)

1.71 moles have (1.71 . NA) = 1.03×10²⁴ molecules

4 0
3 years ago
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