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Iteru [2.4K]
3 years ago
7

Which property of an atom's structure was used to organize the periodic table?

Chemistry
1 answer:
pshichka [43]3 years ago
6 0
A atomic number hope i helped
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Find the mass of (1) potassium which contains the same number of atoms as 5g of zinc and (2) iron which contains the same number
charle [14.2K]
Convert grams to moles
moles to moles
moles to grams

A. 2.99g
b. 20.88g

sent a picture of the work. hope you see it

5 0
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What would you need to do to calculate the molality of 10 mol of NaCl in 200
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It will be the second one
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Given that the ka for hocl is 3.5 × 10–8, calculate the k value for the reaction of hocl with oh–.
Harlamova29_29 [7]
Following reaction is involved in above system
HOCl(aq)  ↔  H+(aq) + OCl-<span>(aq)
</span>OCl-(aq) + H2O(l)  ↔ HOCl(aq) + OH-<span>(aq)
</span>
Now, if the system is obeys 1st order kinetics we have
K  = [OCl-][H+<span>]/[HOCl]   ............. (1)
</span>∴ [HOCl-] / [OCl-] = [H+] (1 / 3.0 * 10-8<span>)   ............. (2)
</span>
and now considering that system is obeying 2nd order kinetics, we have
K  = [OH-][HOCl-] / [OCl-] ................. (3<span>)
</span>Subs 2 in 3 we get
K = [OH-][H+] (1 / 3.0 * 10-8<span>)
</span>we know that, [OH-][H+] = 10<span>-14

</span>∴K = 3.3 * 10<span>-7
</span>
Thus, correct answer is e i.e none of these
6 0
3 years ago
Read 2 more answers
A sample of an unknown substance has a mass of 0.158 kg. If 2,510.0 J of heat is required to heat the substance from 32.0°C to 6
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Specific heat capacity is the required amount of heat per unit of mass in order to raise teh temperature by one degree Celsius. It can be calculated from this equation: H = mCΔT where the H is heat required, m is mass of the substance, ΔT is the change in temperature, and C is the specific heat capacity.

H = m<span>CΔT
2501.0 = 0.158 (C) (61.0 - 32.0)

C = 545.8 J/kg</span>·°C
5 0
4 years ago
A _____ works by lighting the slide containing the specimen from below with a light bulb.
lesya692 [45]
Condenser Lens - This lens system is located immediately under the stage and focuses the light on the specimen.
5 0
3 years ago
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