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prohojiy [21]
3 years ago
9

Volume of 100ml. it’s density is 0.15g/ml. what is its mass?

Chemistry
2 answers:
11Alexandr11 [23.1K]3 years ago
3 0
V=100mL\\
d=0,15\frac{g}{mL}\\\\
m=dV=0,15\frac{g}{mL}*100mL=15g
Veseljchak [2.6K]3 years ago
3 0

Answer:

The mass of the substance is 15 grams.

Explanation:

Mass of the substance = m

Volume of the substance = V = 100 mL

Density of the substance = d = 0.15 g/mL

The formula of density is ;

Density=\frac{Mass}{Volume}

d=\frac{m}{V}

0.15 g/mL=\frac{m}{100 mL}

m=0.15 g/mL\times 100 mL=15 g

The mass of the substance is 15 grams.

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Lead ions and magnesium ions both have a charge of 2+. predict the ionic equation for this reaction.
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PbMg

Explanation:
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4 0
2 years ago
How many water molecules are created when 32 grams of oxygen react completely with 4.0 grams of hydrogen?
ch4aika [34]

Answer:

d. 1.2 × 1024

Explanation:

From the equation of reaction

2H2 + O2= 2H2O

i.e 2mole(4g) of hydrogen requires 1 mole(32g) of oxygen to produce 2mole (2×6.02×10^23 molecules) of H2O= 1.2×20^24 molcules of water.

NB: 1 mole of H2O contains 6.02×10^23 molecules of H2O

3 0
3 years ago
Here is Beck's address:
777dan777 [17]

Hi! My answer would be D, USA.


Explanation:


We are provided with 5 pieces of an address. They are as followed.

12 Riverdale Lane, Apartment A, San Jose, California, and USA.


Imagine each of the five parts of Beck's address represents Earth, the Milky Way, the moon, the solar system, or the universe, based on their sizes. Which of the following parts of Beck's address would represent the solar system?



If we have to plug in Earth, the Milky Way, the moon, the solar system, and the universe, (all based on size,) we would first start with what "Apartment A" would be in this scenario. Apartment A is the smallest piece we have to work with, and so is the moon. This leads me to believe that the Moon should be plugged into Apartment A. Now, 12 Riverdale Lane is most likely going to be the Earth, since it is the second smallest one on our list. San Jose would turn into the Sun, California represents the Milky Way, and USA represents the solar system.


I sincerely hope I helped!


Have a wonderful day :)


~AmbitiousAndProud

3 0
3 years ago
Read 2 more answers
Calculate the number of moles of iodine in 7.68×10^25 molecules of I2
Dmitrij [34]

Answer:

<h2>127.57 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{7.68 \times  {10}^{25} }{6.02 \times  {10}^{23} }   \\  = 127.574750...

We have the final answer as

<h3>127.57 moles</h3>

Hope this helps you

4 0
2 years ago
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