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Archy [21]
2 years ago
10

Who tryna date? like ong

Chemistry
2 answers:
Masteriza [31]2 years ago
5 0

Answer:sheshhh sayless XD

Explanation:

Elanso [62]2 years ago
4 0

Answer:

Im confused. Do you need help with something?

Explanation:

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C. A 75 lb (34 kg) boy falls out of a tree from a height of 10 ft (3 m). (3 points)
KatRina [158]

(I) kinetic energy of the boy when he hits the ground =potential energy

I. e ½mv²=mgh where g is 10ms-²

m=34kg, g=10ms² , h=3m

=34×10×3

=1020j

(i i) v²=u²+2gh

v²=0²+2×10×3

= 60

v=sqrt of 60

7 0
2 years ago
using the chemical stoichiometry, determine the number of moles of carbonic acid that can be produced from 4 mol of NaHCO3 and 8
Pavlova-9 [17]
Reaction is NaHCO3 + HCL = H2CO3 + NaCl
the ratios are 1:1 

the 8 moles of HCl are in excess

so if you use 4 moles of NaHCO3 then you will obtain 4 moles of carbonic acid

hope that helps
6 0
3 years ago
Read 2 more answers
Which is a pure substance??
sveta [45]
The answer is A. Table salt is a pure substance.
4 0
3 years ago
Read 2 more answers
The shielding of electrons gives rise to an effective nuclear charge, Zeff, which explains why boron is larger than oxygen. Esti
Paul [167]

Answer:

Option B. +3 and +6

Explanation:

<em>Zeff</em> = <em>z - s</em>

where <em>z</em> is the atomic number, <em>s</em> is the number of shielding(non-valence) electrons

For Boron, electronic configuration is 1s²2s³.

z = 5, s = 2

Zeff = 5 - 2 = +3

For Oxygen, electronic configuration is 1s²2s²2p⁴

z = 8, s = 2

Zeff = 8 - 2 = +6

3 0
2 years ago
Convert the following a) 8.43 Km/week to millimeters/second
Westkost [7]

Answer:

13.93849 millimeters/second

Explanation:

8 0
2 years ago
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