This problem requires our calculation to undergo the dimensional analysis approach. In this approach, you disregard the actual quantity and focus on the units of measurement. This helps us know the units of our final answer.
First, let's ignore 16. Let's focus on converting the units kPa-mm³/s to mJ/s. The unit kPa stands for kiloPascals which is 1000 times greater than 1 Pa. The unit mJ, on the other hand, stands for millijoules, which is 1000 times lesser than Joules. The relationship between the two is that, Joules = Pa × m³. But since we want our final answer to be mJ, that would be equal to Pa×mm³. Since the original unit already contains mm³, all we have to do is convert kPa to Pa.
16 kPa-mm³/s * (1000 Pa/1 kPa) = 16,000 Pa-mm³/s
Since Pa-mm³ is equal to mJ, the final conversion yields to 16,000 Pa-mm³/s.
Answer:
12
Explanation:
You will need a chemical equation with masses and molar masses, so let’s gather all the information in one place.
: 258.21 18.02
KAl(SO₄)₂·xH₂O ⟶ KAl(SO₄)₂ + xH₂O
Mass/g: 4.74 2.16
Step 1. Calculate the mass of the KAl(SO₄)₂.
Mass = 4.74 g – 2.16 g = 2.58 g.
Step 2. Calculate the moles of each product.
Step 3. Calculate the molar ratio of the two products.
1 mol of KAl(SO₄)₂ combines with 12 mol H₂O, so x = 12.
Cu-63 and Cu-65 have 34 and 36 neutrons, respectively, in each atom. 27- Because copper has an atomic number of 29, which essentially implies that an atom of copper has 29 protons and 29 electrons, an atom of copper has a total of 29 electrons.
The stable isotope of copper is copper-63, which has a nuclear spin of 3/2, a relative atomic mass of 62.929601, and a natural abundance of 69.2 atoms. a trace element of a heavy metal having the atomic symbols Cu, 29, and 63.55. This atom has the mass number 63 because it is a copper-63 atom. Every atom of a particular element has the same atomic number, which may be determined as the element's number on the predictable.
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