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3 years ago

Take off contact lenses first before using an eye wash station . True or False

Chemistry

2 answers:

katen-ka-za [31]3 years ago

4 0

A true because whatever you’re washing out, will get stuck behind your lenses

ryzh [129]3 years ago

3 0

Answer:

TRUE

Explanation:

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How do I do letter D? Someone help me please

Minchanka [31]

So for D you have to find energy right
from c you get wavelength Lambda
so on D use this
E = Hc / lambda
c is given 1.5 x 10 ^20
h = 6.624 x 10^-34
and then you get answer for energy

8 0

3 years ago

Determine the enthalpy change when 23.5 g of carbon is reacted with oxygen according to the reaction C(s) + O2(g) CO2(g) delta H

xeze [42]

We are provided with the amount of energy released when one mole of carbon reacts. We mus first convert the given mass of carbon to moles and then compute the energy released for the given amount.

Moles = mass / atomic mass
Moles = 23.5 / 12
Moles = 1.96 moles

One mole releases 394 kJ/mol
1.96 moles will release:
394*1.96
= 772.24

The enthalpy change of the reaction will be -772.24 kJ

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3 years ago

Which of the following are balanced equations? Check all that apply.

EleoNora [17]

Answer: the answer is b

Explanation:

because why not

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3 years ago

which parts of animals are rarely preserved unburied because scavengers eat them and bacteria decompose them? hard shells soft s

katovenus [111]

Soft skulls. hope this helps

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3 years ago

Read 2 more answers

When the vapor pressure of water is 0.106 mmHg, determine the reaction quotient for that above equilibrium.

TEA [102]

Answer:

Answer is explained in the explanation section below.

Explanation:

Note: This question is not complete and lacks necessary data to solve. However, I have found a similar question and I will be using its data to solve this question for the sake of understanding and concept.

Solution:

Equilibrium Reaction:

CaO(s) + H2O(g) -->Ca(OH)2(s)

We need to find the reaction quotient for this question:

Q = $\frac{1}{P_{H20} }$

Here, only the pressure of the gaseous reactant will be used and here H20 is the only reactant which is gaseous.

And we are given that, vapor pressure of water is = 0.106 mmHg

So,

Now, we need to convert it into atm

so, 1atm = 760 mmHg

0.106 mmHg = 0.106/760 atm

0.106 mmHg = 1.394 x $10^{-4}$ atm

Plugging in the values in the equation, we get:

Q = $\frac{1}{P_{H20} }$

Q = $\frac{1}{1.394 . 10^{-4} }$

Q = 7173.60 $atm^{-1}$

8 0

3 years ago