<h3>
Answer:</h3>
The international scientific units of measurements
<h3>
Explanation:</h3>
- SI units are units of measurement that are accepted and agreed upon globally as standard units of measurements.
- Examples include, meters(m) to measure length, kilograms(kg) to measure mass and seconds(s) to measure time among others.
- SI units can however, be converted to other units using multiplication factors. For example to convert kg to g we multiply the number of kg with 1000.
Answer:
ⁿₐX => ²¹⁸₈₄Po
Explanation:
Let ⁿₐX be the isotope.
Thus, the equation can be written as follow:
²²²₈₆Rn —> ⁴₂α + ⁿₐX
Next, we shall determine the value of 'n' and 'a'. This can be obtained as follow:
222 = 4 + n
Collect like terms
222 – 4 = n
218 = n
Thus,
n = 218
86 = 2 + a
Collect like terms
86 – 2 = a
84 = a
Thus,
a = 84
ⁿₐX => ²¹⁸₈₄Po
²²²₈₆Rn —> ⁴₂α + ⁿₐX
²²²₈₆Rn —> ⁴₂α + ²¹⁸₈₄Po
Correct Answer: option 4: Si-O
Reason:
The bond polarity depends on the electronegativity difference between constituent atoms. Greater the electronegativity difference, polar is the bond. In present case, electronegativity of Si and O is 1.9 and 3.44 respectively. Hence, electronegativity difference is 1.54, which is greater as compared to other bonds on present interest. Hence, Si-O bond is considered to be more polar.
Answer:
5.99 moles of
Explanation:
In this case, we can start with the <u>decomposition</u> of , so:
<u>(Reaction 1)</u>
The can react with carbon to produce :
<u>(Reaction 2)</u>
If we 8.99 mol of , we can calculate the moles of that we need. In reaction 2 we have a <u>molar ratio</u> of 1:2 (2 moles of will produce 1 mol of ):
With this value and using the <u>molar ratio</u> in reaction 1 (3 moles of are producing by each mol of ), so:
So, we will need 5.99 moles of to produce 8.99 mol of .
I hope it helps!
Answer:
The correct answer is the imperial system.
Explanation:
Only three countries in the world, that is, the United States, Myanmar, and Liberia use the imperial system. These include measurements in the form of inches, ounces, Fahrenheit, and feet. In the imperial system, the distances, height, weight, or area measurements are used eventually that traced back to everyday items or parts of the body.
In comparison to other metric systems, the units used in the imperial system are not further differentiated easily into parts of hundreds or thousands, and are thus, regarded of less use in comparison to other metric systems by some. The real follower of the imperial system at present in the world is the United States.