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Y_Kistochka [10]
3 years ago
12

Please answer these im begging you!!!!!

Chemistry
1 answer:
I am Lyosha [343]3 years ago
8 0
5) through space
2) refraction
3) bent straw in water
4) aluminum
1) i think it’s A
good luck! :)
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What does the interquartile range represent?
Marizza181 [45]

Answer: C) middle 50 percent of the data

The interquartile range (IQR) spans from the first quartile Q1 to the third quartile Q3.

25% of the data is below Q1 and 75% of the data is below Q3. The gap between the two endpoints consists of 75-25 = 50 percent of the data, or half of the data.

3 0
3 years ago
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Hydrogen peroxide can decompose to water and oxygen by the following reaction
mestny [16]
To begin calculating, there is one thing you need to remember :1 mole of H2O2=34.0148 g
Then we have 5.00g of H2O2=5/34.0148=0.146995
As you know decomposition of 2moles now has prodused <span>196kj
So, </span><span>q is made due </span>0.146995 moles of H2O2=(-196/2)*0.146995=-14.40551Kj
I'm sure it will help.
6 0
3 years ago
NEED ASAP WILL MARK BRAINLIEST ON TIMER
vladimir1956 [14]

Answer:

The answer is 2.660 mol/l

Explanation:

Given: n= 0.0665, v= 25.00ml

Required: C

C (molarity)= n (of solute)/ v (of solvent) [ standard unit: mol/l]

First convert volume of solvent in its standard unit, i.e. litres(L)

v= 25.00ml/1000= 0.02500L

C = 0.0665 mol / 0.02500 L= 2.660 mL (In proper significant digits i.e. 4 sigdigs)

Therefore, The molarity of the sulfuric acid is 2.660 mol/L :)

3 0
3 years ago
True or false ( because water has a high _____ objects will float on it )
eimsori [14]
Objects float on water because it has surface tension.
3 0
4 years ago
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As the period number increases on the periodic table (moving from the top of the table to the bottom), A. the atomic number incr
natka813 [3]

C) the number of the pricipal energy level containing the outer electrons increases

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3 years ago
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