Characteristics used to classify stars include color, temperature, size, composition, and brightness. Stars vary in their chemical composition. Astronomers use spectrographs to determine the elements found in stars.
Answer:
1.43×10⁶ > 2.34×10⁵> 3.25×10⁴>4.56×10³> 5.17×10²
Explanation:
First of all we will write these values in simple notation.
1) 1.43×10⁶
1.43×1000000
1430000
2) 5.17×10²
5.17×100
517
3) 2.34×10⁵
2.34×100000
234000
4) 3.25×10⁴
3.25×10000
32500
5) 4.56×10³
4.56×1000
4560
Rank from greatest to least.
1.43×10⁶ > 2.34×10⁵> 3.25×10⁴>4.56×10³> 5.17×10²
Answer:
Explanation:
a. CuO+ 2HCl⇒CuCl2+ H2O
b. = = 0,05 (mol)
⇒= =0,05 mol
⇒= 0,05×135=6,75 (g)
c. =2× =0,1 (mol)
⇒= 0,1×36,5= 3,65 (g)
⇒= ×100=36,5 (g)
⇒ Nồng độ phần trăm dd sau phản ứng= Nồng độ % dd CuCl2=×100= ×100≈ 16,67%
Lithium Bromide : LiBr.
Molar mass of lithium bromide : 86.845 g/mol.
To find the mass of 2.6 mol of lithium bromide, simply multiply in order to cancel out the moles : 2.6 mol * 86.845 g / 1 mol = 225.8 grams.