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Arturiano [62]
3 years ago
11

QUESTION 1

Chemistry
1 answer:
umka2103 [35]3 years ago
5 0
B. Electricity
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Pb(OH)Cl, one of the lead compounds used in ancient Egyptian cosmetics, was prepared from PbO according to the following recipe:
sladkih [1.3K]

Answer:

8.59 g

2.25 g

Explanation:

According to the given situation the calculation of grams of PbO and grams of NaCL is shown below:-

Moles of Pb(OH)CL is

= \frac{Mass}{Molar\ mass}

= \frac{10.0 g}{259.65g / mol}

= 0.0385 mol

Mass of PbO needed is

= 0.385mol Pb(OH) Cl\times \frac{1 mol PbO}{1molpb (OH) cl} \times \frac{223.2g PbO}{1mol PbO}

After solving the above equation we will get

= 8.59 g

Mass of NaCL needed is

= \frac{1mol\ NaCl}{1molPb\ (OH)Cl} \times \frac{58.45NaCl}{1mol NaCl}

After solving the above equation we will get

= 2.25 g

Therefore we have applied the above formula.

7 0
3 years ago
HELP ME PLEASEEE ILL MARk u the brainliest
Novay_Z [31]

Answer:

3rd or 4th answer is correct

8 0
3 years ago
Read 2 more answers
what do the colors produced by fireworks indicate? a. a physical change c. a state change b. a chemical change d. an element cha
Nat2105 [25]
B. A chemical change 
6 0
3 years ago
Type a sentence or two about early models of telephones. Include its description.
Evgesh-ka [11]

Answer:early models of telephones were used with a twirl of numbers

Explanation:

Not advanced technology

8 0
3 years ago
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Swimming pool structures and structural _____ [680.26(B)(1) and (B)(2)] shall not be used as a grounding electrode.
leonid [27]

A grounding electrode is any object that directly links to the earth. They are most times used to divert electricity from the elements.

  • Swimming pool structures and structural <u>reinforcing steel. 250.52(B)(3)</u><u>,</u> [680.26(B)(1), and (B)(2)] shall not be used as a grounding electrode.

In code 250.52(B)(3) it is clearly specified that the bonding grid and reinforcing steel that is related to a pool should not be used as grounding electrodes.

This is essential because when a metal that lies beneath a swimming pool is used as a grounding electrode, current from nearby electrical systems can be introduced into the pool.

This could cause the electrocution of anybody in the swimming pool at that time.

Learn more here:

brainly.com/question/14681208

7 0
3 years ago
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