How many molecules are in 0.25 mole of CO? 1) 1.5*10^23
2) 6.0*10^23
3) 3.0*10^23
4) 9.0*10^23

BELOW

Explanation:

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A mole of anything is 6.022 x 10^23 particles

So 0.25 mol CO has 0.25 mol of CO molecules  

0.25 mol CO has 0.25 x 6.022 x 10^23 molecules = 1.5 x 10^23 molecules [to 2 sig figs]

[btw ... if it wanted the number of atoms ... it'd be twice as much because there'd be 0.25 mol of C atoms + 0.25 mol of O atoms ... just be careful what they ask for]

2.00 mol Ni = 2.00 x 6.022 x 10^23 atoms = 1.20 x 10^24 atoms [to 3 sig figs]

HMMM ... looks like you use 6.02 x 10^23 for the mole

so 3.01 x 10^23 atoms He is 0.5 mol He [because He is monatomic]

Molar mass He = 4.00 g

Mass He in sample = 0.5 mol He x (4.00 g He / 1 mol He)

= 2.00 g [to 3 sig figs]

Neon is also monatomic

Molar mass Ne = 20.18 g

Number of mol Ne in sample = 80 g Ne x (1 mol Ne / 20.18 g Ne)

Number of atoms in sample = 80 g Ne x (1 mol Ne / 20.18 g Ne) x 6.022 x 10^23

= 2.4 x 10^24 atoms of Ne [to 2 sig figs]

um hope this is what u meant ^-^

the answer is: they rebelled against saddam hussein’s rule.

kurds opposed saddam rule and wanted independence. kurds in the north and shiites in the south revolt against hussein.

for example, the halabja attack in 1988 conducted against the kurdish people by the iraqi regime under saddam hussein, where between 4000 people are killed and around 9000 are injured.

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest