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Sergeu [11.5K]
3 years ago
7

HELPP please I’ll mark you as brainlister it’s 100 points

Chemistry
1 answer:
Andrei [34K]3 years ago
4 0

Answer:

4

Explanation:

hope this helps, can i have brainliest

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Explain why pure water has a very slight electrical conductivity.
Pepsi [2]
For electricity to flow there must be a flow of electrons or ions present in a system or medium. When electricity is passed in pure water, oxygen does not have d-orbitals or f-orbitals through which electrons may pass. In pure water there are no electrolytic substance, so no ions present in the pure water. Therefore electricity can not pass through pure water. Additionally; water cannot dissociate into OH- and H+ when electricity is passed through pure water.
7 0
4 years ago
Using the arrangement of the periodic table, which elements are the most similar to phosphorus in properties?
Nana76 [90]

Answer:

Nitrogen and Arsenic

Explanation:

Since Phosphorous and Arsenic both are Nitrogen group elements i.e. Group(Va)

6 0
4 years ago
Please help y’all I don’t understand
DedPeter [7]

Answer:

the last one

Explanation:

6 0
3 years ago
How many grams of potassium bromide, KBr, are in 100mL of a 0.50 M solution?
VMariaS [17]

Answer:

5.95g

Explanation:

1 dm^{3} = 1000 mL

∴ 100 mL = 100 ÷ 1000 = 0.1 dm^{3}

Volume = <u>0.1 </u>dm^{3}<u />

Concentration = <u>0.5 M</u>

Concentration = \frac{No. of moles}{volume}

0.5 = \frac{x}{0.1}

No. of moles = 0.5 x 0.1 = <u>0.05 moles</u>

No. of moles = \frac{mass}{mass. in. 1. mole}

Mass in 1 mole of KBr = 39 + 80 = 119g (39 is the mass of potassium and 80 is the mass of bromine)

0.05 = \frac{x}{119}

x = 119 × 0.05 = 5.95g

4 0
3 years ago
No links pls it’s very unhelpful
Reptile [31]

answer : i don’t knowww :)

Right spelling:

Answer: I don’t know. :)

7 0
3 years ago
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