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3 years ago

A/1 * B/C =D

Chemistry

1 answer:

Korvikt [17]3 years ago

7 0

Exchange rate is 1.5 guilders for every 2.4 florins

The conversion factor will be

1.5 guilders / 2.4 florins = 2.4 florins / 1.5 guilders = 1

so if we wish to convert 4 guilders to florins we will use following conversion factor

2.4 florins / 1.5 guilders = B / C

D = 4guilders X 2.4 florins / 1.5 guilders = 6.4 florins

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Answer:

See explanation

Explanation:

If heat is given out in a reaction, then that reaction is exothermic. If heat is absorbed in a reaction, then that reaction is endothermic.

Hence, if heat is given out, the reaction is exothermic. The heat given out does work on the surrounding thus the laws of conservation of energy are obeyed.

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3 years ago

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Determine the empirical and molecular formula for a compound containing 26.1

kobusy [5.1K]

determing that the compoumd formed is in 100%

therefore, 26.1 +4.3+69.6 = 100%

hence no need of adding O molecule

finding the numbr of moles of each element

no. of moles of C= given mass÷molar mass

=26.1÷12

=2.1 mol

no. of moles of H = given mass÷molar mass

=4.3÷1

=4.3 mol

no of moles of O =given mass÷molar mass

=69.6÷16

=4.3

the simplest whole nber of the element in the unknown compoumd is 1:2:2 of C:H:O

HENCE, the empirical formula is CH2O2

empirical formula mass of CH2O2 IS

=(12)+(2×1)+(16×2)

12+2+32

46 G/MOL

N= molar mass of the compoumd ÷ emporical mass of the compoumd

N= 138÷46

N=3

molecular formula =N×empirical formula

=3 ×CH2O2

C3H6O6 is the molecular formula

(tartonic acid)

hope it helped u!

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3 years ago

Chadwick's experimental work on the atom led to a better understanding of isotopes.

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Chadwick discovered the existence of neutrons which accounts for isotopy.

Isotopes exists because atoms of the same element may differ in the number of neutrons present in each one. This phenomenon is called isotopy.

Chadwick discovered the existence of isotopes by bombarding Beryllium with alpha particles obtained from Polonium decay.

The discovery of the existence of neutrons led us to the a better understanding of isotopes since isotopes differ only in the number of neutrons present.

Learn more: brainly.com/question/13214440

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2 years ago

In a titration experiment, 31. 4 ml of 1. 120 m hcooh is neutralized by 16. 3 ml of ba(oh)2. what is the concentration of the ba

Volgvan

In a titration experiment, 31. 4 ml of 1. 120 M HCOOH is neutralized by 16. 3 ml of $Ba(OH)_{2}$ . So, the concentration of the $Ba(OH)_{2}$ solution is 23.16 M