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3 years ago

What is the difference between an exothermic and endothermic reaction

Chemistry

2 answers:

inysia [295]3 years ago

7 0

A ABSORBS HEAT.....................

RideAnS [48]3 years ago

5 0

Hello there!

Endothermic reactions absorb heat, so the first option is your answer.

Hope this helps :)

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30 mL of 0.6 M HCl solution is neutralized with 90 mL NaOH solution. What is the concentration of the base? Show all work Please

skad [1K]

From

na=1

nb=1

Va=30mls

Vb=90mls

Ma=0.6M

Mb=?

from

Mb=Ma×Va×nb

 Vb×na

Mb=0.6×30×1

 90×1

mb=18

 90

Mb=0.2M

NaOH=40

From

conc=molarity×mr

conc=0.2×40

conc=8g/mol

3 0

2 years ago

Which conclusion is supported by the information in the graph?

Molodets [167]

Answer:

A. The cost of producing a kilowatt of power with fuel cell will be less than $30 in 2015

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2 years ago

What characterizes a Homo genesis mixture

Salsk061 [2.6K]

Answer:

The correct answer would be the third choice.

Homo-genesis mixtures are the same in composure, and will be hard to break apart other then with chemical means.

Hope this helps!

6 0

3 years ago

Which of the following is a radioisotope used to date rock formations older than 50,000 years old?

Natasha2012 [34]

I'm not so sure but I would say Answer Choice B

3 0

2 years ago

Read 2 more answers

Write word equations for the reactions of a) magnesium with chlorine b) potassium with oxygen c) sodium with bromine d) carbon w

IRINA_888 [86]

A) Magnesium + Chlorine -> Magnesium chloride ( Mg + Cl2 -> MgCl2)

b) Potassium + Oxygen -> Potassium oxide
( 2K + O2 -> K2O )

c) Sodium + Bromine -> Sodium bromide
( 2Na + Br2 -> 2NaBr)

d) Carbon + Oxygen -> Carbon dioxide
( C + O2 -> CO2 ) This reaction occurs when heated.

4 0

2 years ago