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Masteriza [31]
3 years ago
5

CAN SOMEONE HELP ME WITH THESE QUESTIONS PLEASE

Chemistry
2 answers:
Leto [7]3 years ago
6 0

Answer:what was it so I can help u do u even got the answers yet I’ll tell you I’m not going to guess

1.

Explanation:

Nostrana [21]3 years ago
5 0
What are they? .............
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How many atoms are in co2?
UNO [17]
There are 3 atoms in CO2 (Carbon dioxide).
Carbon has 1 atom and oxygen has 2 atoms.
8 0
3 years ago
How to make 0.01 Molar solution in 30 ml of water
Leviafan [203]

Answer:

You see the concentration decreased ten fold, from 1 M to 0.1 M.

You can simply increase the volume by ten times.

For example

If you have 250 mL of 1 molar HCl, you can add distilled water upto 2500 mL. Now the concentration is 0.1 molar.

If you want to use the serial dilution method, you can use the C1V1=C2V2 equation.

C1 = starting concentration.

C2 = final concentration.

V is for volume.

So let's say you have 500 mL of 1 M HCl and you only want 50 mL of 0.1 M HCl.

1 M x V1 = 0.1 M x 50 mL

V1 = 5 mL

So you take 5 mL of the original (stock) solution and dilute it up to 50 mL. Then you have 50 mL of 0.1 M HCl.

Explanation:

4 0
3 years ago
) A magnet that’s domains remain aligned when removed from a magnetic field.
True [87]

Answer:

Above the Curie temperature, a magnet permanently loses all or some of its magnetism. External magnetic fields: Strong, opposing magnetic fields can cause the magnetic domains to lose their orientation and relax into a lower state of energy where they are not aligned.

Explanation:

4 0
3 years ago
Question 2 (2 points)
poizon [28]

Answer:

m_w=439.2g

Explanation:

Hello!

In this case, since the by-mass percent of a solution is a measure of the mass of the solute over the mass of the solution:

\%m/m=\frac{m_{solute}}{m_{solution}} *100\%

As we know the mass of the solution and the by-mass percent, we can compute the mass of glucose in the 480 g of solution:

m_{solute}=\frac{\%m/m*m_{solution}}{100\%}

Thus, by plugging in the data, we obtain:

m_{solute}=\frac{8.5\%*480g}{100\%}=40.8g

Finally, since the solution is made up of glucose and water, we compute the mass of water as follows:

m_w=m_{sol}-m_{solute}=480g-40.8g\\\\m_w=439.2g

Best regards!

7 0
3 years ago
2H2+O2-->2H2O, If you have 9 moles of Hydrogen gas (H2), how many moles of water can you form? (Enter just the number: not th
Naddika [18.5K]

If  you  have  9   moles  of hydrogen gas(H2)  the   moles of water that  can  be formed is   9 moles


<u><em>calculation</em></u>

2H2  +O2→ 2H2O

 The  mole  of H2O  is calculated   using the   mole  ratio.

that  is  H2:H2O  is   2:2  into simple form = 1:1

therefore if 9 moles  of  H2  reacted the   moles of H2O  =  9 x1/1  =  9 moles

8 0
3 years ago
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