Taking into account the scientific notation, the result of the subtraction is 6.5×10⁵.
<h3>Scientific notation</h3>
First, remember that scientific notation is a quick way to represent a number using powers of base ten.
The numbers are written as a product:
a×10ⁿ
where:
- a is a real number greater than or equal to 1 and less than 10, to which a decimal point is added after the first digit if it is a non-integer number.
- n is an integer, which is called an exponent or an order of magnitude. Represents the number of times the comma is shifted. It is always an integer, positive if it is shifted to the left, negative if it is shifted to the right.
<h3 /><h3>Subtraction in scientific notation</h3>
You want to subtract two numbers in scientific notation. It should be noted that when the numbers to be added do not have the same base 10 exponent, the base 10 power with the highest exponent must be found. In this case, the highest exponent is 5.
Then all the values are expressed as a function of the base 10 exponent with the highest exponent. In this case: 5.00×10⁴=0.500×10⁵
Taking the quantities to the same exponent, all you have to do is subtract what was previously called the number "a". In this case:
7.00×10⁵ - 0.500×10⁵= (7.00- 0.500)×10⁵= 6.5×10⁵
Finally, the result of the subtraction is 6.5×10⁵.
Learn more about scientific notation:
brainly.com/question/11403716
brainly.com/question/853571
#SPJ1
Answer:
False
Explanation:
The correnct chain is labeled Maize, Goat, Man.
Answer:
0,13 moles of acid are produced
Explanation:
The reaction of the problem is:
PCl₅ + 4H₂O → 5HCl + H₃PO₄
Based on the reaction, 1 mole of PCl₅ produces 6 moles of acid (5 moles of HCl + 1 mole of H₃PO₄).
The molecular mass of PCl₅ is:
1P = 30,97g/mol + 5Cl = 5×35,45g/mol = <em>208,24 g/mol</em>
That means 4,5g of PCl₅ are:
4,5g PCl₅×(1mol / 208,24g) = 0,0216 moles of PCl₅. As 1 mole of PCl₅ produces 6 moles of acid, 0,0216 moles of PCl₅ produce:
0,0216 moles PCl₅ × (6 moles acid / mole of PCl₅) =
<em>0,13 moles of acid are produced</em>
I hope it helps!
In general, there are four main purposes of government to establish laws, maintain order and provide security, protect citizens from external threats, and promote the general welfare by providing public services.
