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Oxana [17]
3 years ago
8

Which of the following statements concerning the measured number 0.3030

Chemistry
1 answer:
Dennis_Churaev [7]3 years ago
8 0

Answer:

C

Explanation:

If you move the decimal to the left it transforms the expression into scientific notation.

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All faculty members are happy to see students help each other. Dumbledore is particularly pleased with Hermione. Though, it shou
____ [38]

Answer:

m_{Mg}=30.8mgMg

Explanation:

Hello,

Based on the given chemical reaction, as 31.2 mL of hydrogen are yielded, one computes its moles via the ideal gas equation under the stated conditions as shown below:

n_{H_2}=\frac{PV}{RT}=\frac{754torr*\frac{1atm}{760torr}*0.0312L}{0.082 \frac{atm*L}{mol*K}*298.15K}=1.27x10^{-3}molH_2

Now, since the relationship between hydrogen and magnesium is 1 to 1, one computes its milligrams by following the shown below proportional factor development:

m_{Mg}=1.27x10^{-3}molH_2*\frac{1molMg}{1molH_2}*\frac{24.305gMg}{1molMg}*\frac{1000mgMg}{1gMg}\\m_{Mg}=30.8mgMg

Best regards.

3 0
3 years ago
Express the measurement 4.22 quarts in the units of microliters​
11Alexandr11 [23.1K]

Answer:

3.99x10^6 \mu L

Explanation:

Hello there!

In this case, for this units conversion problem, it turns out necessary to write the equivalence statement for liters and quarts as follows:

1 qt = 0.946353 L

Thus, the conversion set up turns out to be:

4.22qt*\frac{0.946353 L}{1qt} \\\\=3.99L

Next, we convert to microliters as follows:

3.99L*\frac{1\mu L}{10^{-6}L}\\\\=3.99x10^6 \mu L

Regards!

5 0
3 years ago
Describe the Self-Consistent Field (SCF) method for obtaining the orbitals of a Boron atom​
weqwewe [10]
<h3>What is Self-Consistent Field (SCF)?</h3>

This is used in quantum chemical models to accurately calculate the amount

of orbitals present in an element.

The Self-Consistent Field (SCF) method for obtaining the orbitals of a

Boron atom​ involves the following processes which include:

  • Selecting an approximate Hamiltonian
  • Solving the Schrödinger equation to obtain a more accurate set of orbitals.
  • Solving the Schrödinger equation again until the results converge.

The converging of the result typically signified the end of the solving of the

equations  and the derivation of the orbitals of the Boron atom.

Read more about Orbitals here brainly.com/question/26000020

6 0
3 years ago
Calculate the massa of water produced if 1.00 gran of hydrogen is burned in 10.00 grams of oxygen
Anna71 [15]
The first step to this question is finding the balanced chemical reaction.
H₂+1/2O₂⇒H₂O
Then you need to find the limiting reagent by finding the moles of each reactant then finding how much product each amount of reactants will form.  The reactant that produces the least amount of product is the limiting reagent.
moles of H₂:
1g/(1g/mol)=1mol
moles of O₂:
10g/32g/mol=0.3125mol
moles of H₂O formed with amount of H₂:
1molH₂x(1molH₂O/1molH₂O)=1molH₂O
moles of H₂O formed with amount of O₂:
0.3125molO₂x(1molH₂O/0.5molO₂)=0.625molH₂O
Since less water is produced with the amount of oxygen given, oxygen is the limiting reagent and the moles of water formed from the oxygen is the moles of H₂O we will use to find the amount of H₂O produced.
0.625molH₂Ox18g/mol=11.25g H₂O
3 0
3 years ago
How many moles of calcium chrloride are needed to react completely with moles of silver nitrate?
Inessa [10]
I think the answer is 0.8 ml.
8 0
4 years ago
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