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3 years ago

What do you measure in an experiment to determine reaction rate?

Chemistry

2 answers:

Dovator [93]3 years ago

6 0

D. Time
Just took the test

Cerrena [4.2K]3 years ago

5 0

I believe it’s time Aka D.

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Ivanshal [37]

Answer:

$HCl conc=2.2M$

Explanation:

From the question we are told that:

Mass of zinc $Mass_{z_n}=2.5g$

Initial conc of HCl $HConc_1=6.0M$

Initial volume of HCl $Hvol_1=20.0mL$

Molar mass of zinc $M_{Z_n}=65.38g/mol$

Generally the equation for reaction is mathematically given by

$2HCL+Zn\implies ZnCl_2 +H_2$

Generally the equation for moles of zinc $m_{z_n}$ is mathematically given by

$m_{z_n}=\frac{Mass_{Z_n}}{M_{Z_n}}$

$m_{z_n}=\frac{2.5g}{M_{65.38}}$

$m_{z_n}=0.038molZn$

Generally the equation for moles of $m_{HCl}$ is mathematically given by

$m_{HCl}=HConc_1*Hvol_1$

$m_{HCl}=6.0M*20.0mL$

$m_{HCl}=6.0M*20.0*10^{-3}L$

$m_{HCl}=0.12\ mol\ HCl$

Generally the reacted moles of HCl $HCl_[reacted]$ is mathematically given by

Since

Zn:HCl =1:2

Therefore

$HCl_[reacted]=0.038*\frac{2}{1}$

$HCl_[reacted]=0.076mol \ HCl$

Generally the moles of HCl after Zn oxidization X is mathematically given by

$x=0.12-0.076$

$x=0.044 mol HCl$

Generally the conc of hydrochloride acid X is mathematically given by

$X=\frac{0.044}{0.020}$

$X=2.2 M Hcl$

Therefore Conc of HCl

$HCl conc=2.2M$

5 0

3 years ago

Can you guys please help me I will mark brainliest to whoever answers this right.

Sphinxa [80]

Wants: a stove top- you don’t need it to make food but it’s more convenient.
Wants: automobile- you don’t need a car but it’s easy to go places and faster. You could use a bike instead however it’s not as convenient to some of us.

Needs: sun- we need the sun to stay warm and live and to keep earth living.
Needs:our heat- we need the heat our body provides to live and function

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3 years ago

Why is the atomic weight of carbon reported as 12.011 in the table of elements and the periodic table in the front inside cover

Oduvanchick [21]

The atomic weight reported in the periodic table of elements for Carbon is the average weight of all the known isotopes of Carbon occurring naturally. There are 3: Carbon-12, Carbon-13 and Carbon-14. The numbers represent the mass numbers, or the sum of neutrons and protons in the nucleus. Each of the individual masses are multiplied with their individual percentage abundances. Then, when you add them up, it will yield the average atomic weight equal to 12.011 amu or grams/mole C.

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4 years ago

In the double replacement reaction between na2so4 (aq) and bacl2 (aq), will a precipitate form?

bagirrra123 [75]

A precipitate will form since BaSO₄ is insoluble in water.

8 0

4 years ago

Find the Protons, Electrons and Neutrons for atom with a mass of 3 an an atomic number of 1. I think the atom is Hydrogen, but I

Klio2033 [76]

Answer:

protons=1

electrons=1

neutrons=0

Explanation:

protons and electrons are equal in their natural state when it goes under any reaction the protons of that element remain the same but the number of the element changes.

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3 years ago