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nydimaria [60]
3 years ago
10

Science can best be described as

Chemistry
1 answer:
Savatey [412]3 years ago
8 0
A way of building knowledge about the world around us through observation and experimentation.
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Whats does x stand for?
Furkat [3]

x is the chemical symbol of the element and it must correspond to the atomic number

4 0
2 years ago
Ptrpared a solution of sodium chloride (NaCl) by measuring out 49.Umol of sodium chloride into 150. ML. Volumetric flask and fil
ArbitrLikvidat [17]

Answer:

The answer to your question is below

Explanation:

Data

Substance = NaCl

moles of NaCl = 49

volume = 150 ml

Process

Molarity is a unit of concentration that makes a relation of the moles of a substance and the volume.

Molarity = moles / volume (L)

1.- Convert 150 ml to L

                  1000 ml ------------------ 1 L

                     150 ml -----------------  x

                      x = (150 x 1) / 1000

                      x = 0.15 L

2.- Substitution

Molarity = 49 / 0.15

Molarity = 326. 7

I have a doubt if the number of moles is 49 moles or 49μmoles            

4 0
3 years ago
A certain first order reaction has a half-life of 54. 3 s. How long will it take (in s) for the reactant concentration to decrea
Maksim231197 [3]

Answer:

82.4 s

Explanation:

Find the NUMBEr of half lives...then multiply by 54.3

2.27 = 6.5 (1/2)^n

log (2.27/6.5) / log (1/2) = n = 1.52 half lives

1.52 * 54.3 = 82.4 s

8 0
1 year ago
Hey! Can someone please help me out?
sertanlavr [38]

Answer:

the answer is b

Explanation:

convection is caused by density differences whereby warm air with less density rise above a heater and sink near a cold wind.

7 0
3 years ago
How have water & wind shaped Earth's Surface?
sleet_krkn [62]

Answer:

pangea

Explanation:

7 0
3 years ago
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