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3 years ago

Help! I don't have the things to do this and its due TODAY! Could someone help me?

Chemistry

2 answers:

Orlov [11]3 years ago

5 0

Hot air /heat In pretty sure that’s the answer let me know

vodomira [7]3 years ago

4 0

Answer:

--- The hot air inside the bottle creates an expansion and when the hot water is applied a contraction occurs, thus causing the balloon to be sucked.

--- An internal pressure is produced, joining the heat begins to decrease. As a consequence, the air molecule causes the balloon to enter the bottle thanks to the effect of the external pressure.

Explanation:

I hope I have helped with something.

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If a solution has a pH of 2, what is the hydroxide ion concentration?

murzikaleks [220]

Answer:

Explanation:

14=pH + pOH

pOH= 14 - 2

pOH= 12

pOH= -log[OH]

[OH]= 10^-12

=1×10^-12

5 0

1 year ago

HELP ME PLEASEEE- 8th grade science

icang [17]

Answer:

It's obviously LIGHT ENERGY for me cuz it's from the flashlight..

Explanation:

Hope it helps you..

Your welcome in advance..

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3 0

2 years ago

Bleach is a 0.750 M solution of sodium hypochlorite. What volume, in litres, would contain 120.3 g of sodium hypochlorite?

Lady bird [3.3K]

Answer:

2.15 L

Explanation:

M(NaOCl) = 23.0 + 16.0 + 35.5 = 74.5 g/mol

120.3 g *1 mol/74.5 g = 1.615 mol NaOCl

0.750 M = 0.750 mol/L

1.615 mol * 1L/0.750 mol = 2.15 L

4 0

3 years ago

Which element has the highest ionization energy A. Calcium B. Bromine C. Astatine

inessss [21]

Answer:

bromine

Explanation:

4 0

3 years ago

Read 2 more answers

Calculate the mass of O2 produced if 3.450 g potassium chlorate is completely decomposed by heating in presence of a catalyst (m

sergiy2304 [10]

The reaction is:

2 KClO3(s) → 3 O2(g) + 2 KCl(s) 

A catalyst simply lowers the activation energy so MnO2 is not part of the overall reaction.

By stoichiometry:

3.45 g KClO3 x 1 mol/ 122.55g KClO3 x 3 mol O2/ 2 mol KClO3 x 31.99g/ 1 mol O2 = 331.096/ 245.1 = 1.35 grams O2 produced

Answer:
1.35 grams O2

3 0

3 years ago