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Alinara [238K]
3 years ago
14

What’s the percent composition of each element in strontium carbonate.

Chemistry
2 answers:
julia-pushkina [17]3 years ago
3 0

Answer:

Stronium- 59.35%

Carbon- 8.13%

Oxygen- 32.51%

Explanation:

jok3333 [9.3K]3 years ago
3 0
Google and any other website I can find just says exactly what the first guy said
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Will mark as Brainliest.
xeze [42]
Spontaneous reaction.


3 0
3 years ago
How many grams of dry nh4cl need to be added to 2.50 l of a 0.800 m solution of ammonia, nh3, to prepare a buffer solution that
tia_tia [17]

Answer:

The correct answer is 574.59 grams.

Explanation:

Based on the given information, the number of moles of NH₃ will be,  

= 2.50 L × 0.800 mol/L

= 2 mol

The given pH of a buffer is 8.53

pH + pOH = 14.00

pOH = 14.00 - pH

pOH = 14.00 - 8.53

pOH = 5.47

The Kb of ammonia given is 1.8 * 10^-5. Now pKb = -logKb,  

= -log (1.8 ×10⁻⁵)

= 5.00 - log 1.8

= 5.00 - 0.26

= 4.74

Based on Henderson equation:  

pOH = pKb + log ([salt]/[base])

pOH = pKb + [NH₄⁺]/[NH₃]

5.47 = 4.74 + log ([NH₄⁺]/[NH₃])

log([NH₄⁺]/[NH₃]) = 5.47-4.74 = 0.73

[NH₄⁺]/[NH₃] = 10^0.73= 5.37

[NH₄⁺ = 5.37 × 2 mol = 10.74 mol

Now the mass of dry ammonium chloride required is,  

mass of NH₄Cl = 10.74 mol × 53.5 g/mol

= 574.59 grams.  

8 0
3 years ago
PAP Physical Studies<br><br> How can you remember the periodic table?
siniylev [52]
Break down the table into smaller sections. Memories period by period or if you like by group (like halogens or noble gases).
Just say the elements in order everyday 1-10 then when you get those 11-20 and continued.
3 0
3 years ago
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What must two objects have in order for gravitational force to act on them speed gorse mass orbit
kiruha [24]

Answer:

it is mass

Explanation:

I took the test

8 0
3 years ago
What would happen if the oceanic plates stoped moving
Ket [755]

Answer:

But without plate tectonics, Earth will simply stop making new ones. The mountains we have now would erode over a few million years, turning into low, rolling hills. Our planet would eventually flatten out, with more land ending up underwater. On the bright side, there'd be fewer natural disasters.

Explanation:

that is what would happen

3 0
2 years ago
Read 2 more answers
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