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Bas_tet [7]
4 years ago
10

I need help fast thx

Chemistry
1 answer:
Free_Kalibri [48]4 years ago
6 0
I'm guessing you have to balance these.
I took a picture of my working out.

Answer to the first one = 2HCl+CaCO3=CaCl2+H20+CO2
So basically just add a big 2 in front of the first HCl

Answer to second one = 2Ni + O2 = 2NiO
So basically in this one just add a big 2 in front of both of the Ni

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What is the formula name for Co3N2
Ede4ka [16]

Answer:

Cobaltous Nitride,I think so anyway.......

6 0
3 years ago
g Gaseous methane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 0.96 g of methane
galben [10]

Answer: 2.64 g of carbon dioxide that could be produced by the chemical reaction.

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} CH_4=\frac{0.96g}{16g/mol}=0.06moles

\text{Moles of} O_2=\frac{6.37}{32}=0.20moles

CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)

According to stoichiometry :

1 mole of CH_4 require = 2 moles of O_2

Thus 0.06 moles of CH_4 will require=\frac{2}{1}\times 0.06=0.12moles  of O_2

Thus CH_4 is the limiting reagent as it limits the formation of product and O_2 is the excess reagent.

As 1 moles of CH_4 give = 1 mole of CO_2

Thus 0.06 moles of CH_4 give =\frac{1}{1}\times 0.06=0.06moles  of CO_2

Mass of CO_2=moles\times {\text {Molar mass}}=0.06moles\times 44g/mol=2.64g

Thus 2.64 g of carbon dioxide that could be produced by the chemical reaction.

7 0
4 years ago
Deduce the formula of the ion that has a charge of 2+ with the same electron configuration as krypton.
Andrews [41]

Answer:

Sr²⁺

Explanation:

Krypton has 36 electrons and an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6. An ion with a charge of 2+ and 36 electrons is Sr²⁺. Since it has the same amount of electrons, Sr²⁺ also has an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6.

3 0
3 years ago
Which element requieres the least amount of energy to remove the outermost electron
Arte-miy333 [17]

Answer: Sodium

Explanation: The sodium has only one electron at the outer layer.

Hope this helps! :)

8 0
4 years ago
Read 2 more answers
A 73.0 g piece of metal with specific heat 0.622 Jg∘C and at 105∘C is placed in 300. G of water at 27.0∘C. What will be the fina
Ilia_Sergeevich [38]
Answer: maybe 1.4 degrees higher than initial?

Not sure if all the needed info is here, I’m a bit rusty but I just tried to plug it into my calculator and got stuck. Anyway, the equation needed is Q=mcT, Q being energy, m mass, c spec. heat capacity and T as the change in temperature
8 0
3 years ago
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