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horrorfan [7]
3 years ago
7

Calculate with the correct number of significant figures 2.0 x 10^5 x 3.00 x 10^8

Chemistry
1 answer:
xxMikexx [17]3 years ago
3 0

Answer:

the correct answer is 17 significant figures

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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
2 years ago
A solid ice cube absorbs 151.7 J of energy as it warms from 0.00°C to 4.70°C. What is the mass of the ice cube?
chubhunter [2.5K]
I believe you do 151.7= 4.18x (4.70) because you use the formula q=mcat
5 0
3 years ago
scientist has discovered a new molecular compound that is a long chain of 26 carbons bonded together, with a methyl group on one
Lelechka [254]

Answer:

Fatty acid  

Explanation:

A fatty acid is a carboxylic acid with a long chain of 12 or more carbons.

If the molecule has no other distinguishing features, the compound is hexacosanoic acid, CH₃(CH₂)₂₄COOH.

8 0
3 years ago
5. Which of these elements has the greatest atomic radius? *<br> Be<br> Mg<br> Ra<br> Ba
trapecia [35]
The answer is Ra
Atomic number for Be is 4

Atomic number for Mg 12

Atomic number for Ra 88

Atomic number for Ba 56
5 0
3 years ago
A sample of helium gas is in a sealed rigid container. What occurs as the temperature of the sample is increased
hammer [34]
The electrons will move more rapidly resulting in a higher pressure even at a consistent volume
3 0
3 years ago
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