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o-na [289]
3 years ago
8

Question 6 of 25

Chemistry
2 answers:
seraphim [82]3 years ago
6 0

Answer:

thermal

Explanation:

a p e x

Marianna [84]3 years ago
3 0
The answer will be thermal.
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What volume is needed to make a 2.45 M solution of KCl using 0.50 mol of KCl
Ivan

Answer:

Explanation:

91.4

grams

Explanation:

C

=

m

o

l

v

o

l

u

m

e

2.45

M

=

m

o

l

0.5

L

2.45

M

⋅

0.5

L

=

m

o

l

m

o

l

=

1.225

Convert no. of moles to grams using the atomic mass of K + Cl

1.225

m

o

l

⋅

(

39.1

+

35.5

)

g

m

o

l

1.225

m

o

l

⋅

74.6

g

m

o

l

=

1.225

⋅

74.6

g

=

91.4

g

4 0
2 years ago
1. Imagine you have a sealed 20.0 L balloon filled with helium gas at 750 mmHg in the
SVETLANKA909090 [29]

Answer:

17.6510 L

Explanation:

First we should get the number of moles of helium here by Boyle's law

PV=nRT

P=750/760= 0.9868 atm

T=25+273=298 kelvin

R= 0.08206

V= 20L

so

n=PV/RT

n=0.9868×20/0.08206×298

n=0.80707 mol

Then use the same law

V=0.80707×0.08206×263/0.9869=

17.6510L

SO THE VOLUME WILL BE 17.6510 L

6 0
2 years ago
How does climate determine the organisms that live in a biome
victus00 [196]
Climate determines a biome’s characteristics by being the deciding factor in what can live and grow there.
5 0
3 years ago
The ice blocks demonstrated <br><br> A. conduction <br> B. convection <br> C. radiation
choli [55]

B, the ice blocks demonstrated convection :)

7 0
2 years ago
Read 2 more answers
Hardness is directly related to:
stich3 [128]

Option B: Strength of chemical bonds

Hardness defines the strength, it can not be compared with surface roughness as a smooth surface can be harder or difficult to break than a rough surface. The mass and weight of a substance matters while comparing density of substance or how heavy it is but it is not directly proportional to the hardness of the substance. Thus, equal masses of two substance can not be considered equally hard. Hardness depends on the inter-molecular interaction or forces within a substance, if the inter-molecular interactions are strong or the strength of chemical bonds is strong then the substance is more hard.

Therefore, hardness is directly proportional to strength of the chemical bonds.

4 0
3 years ago
Read 2 more answers
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