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3 years ago

Help me solve. this is science. Which one is it

Chemistry

1 answer:

Vladimir [108]3 years ago

7 0

Answer:

d is the correct answer i think

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When the equation HCl + MnO2 → MnCl2 + H2O + Cl2 is balanced, what is the coefficient for HCl? Question 6 options: 2 3 1 4

igomit [66]

<span>HCl + MnO2 → MnCl2 + H2O + Cl2
To balance this reaction, we have to have an exact number of electrons of each element on both sides. So it will turn into:

4HCl + MnO2 </span>→ MnCl2 + 2H2O + Cl2

From that, we could see that the coefficient for the HCL is 4.

5 0

4 years ago

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Below is a diagram of an atom. What is the atomic number of this atom?

Oksana_A [137]

Answer:

Explanation:

there are 14 electrons in the shells

8 0

3 years ago

What volume of CH4(g), measured at 25oC and 745 Torr, must be burned in excess oxygen to release 1.00 x 106 kJ of heat to the su

anastassius [24]

Answer:

$V=27992L=28.00m^3$

Explanation:

Hello,

In this case, the combustion of methane is shown below:

$CH_4+2O_2\rightarrow CO_2+2H_2O$

And has a heat of combustion of −890.8 kJ/mol, for which the burnt moles are:

$n_{CH_4}=\frac{-1.00x10^6kJ}{-890.8kJ/mol}= 1122.6molCH_4$

Whereas is consider the total released heat to the surroundings (negative as it is exiting heat) and the aforementioned heat of combustion. Then, by using the ideal gas equation, we are able to compute the volume at 25 °C (298K) and 745 torr (0.98 atm) that must be measured:

$PV=nRT\\\\V=\frac{nRT}{P}=\frac{1122.6mol*0.082\frac{atm*L}{mol*K}*298K}{0.98atm}\\\\V=27992L=28.00m^3$

Best regards.

8 0

4 years ago

Which state of matter has no definite size or shape

Sholpan [36]

The only answer you can be given is a gas. It's size is entirely dependent on the container it is in. No matter what the container, a liquid has a definite side. A solid is definitely not the answer.

Answer: A Gas.

6 0

3 years ago

1. A 1.0-gram sample of powdered Zn reacts faster with HCl than a single 1.0-gram piece of Zn because

dalvyx [7]

3)
It has more surface area to react with

3 0

3 years ago

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