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Rasek [7]
2 years ago
6

KNO

Chemistry
1 answer:
Artyom0805 [142]2 years ago
5 0

Answer:

that so hard man its okay

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A prokaryotic organism is isolated from a hydrothermal vent, where it has been observed to be thriving. Based on your knowledge
liubo4ka [24]

Answer:

i have the same question

Explanation:

6 0
3 years ago
What law allows calories to be determined by heat (energy) transfer from one substance to another, but it is never destroyed?
Mila [183]

Answer:

matter i think

Explanation:

matter i am pretty sure

6 0
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Help plzzzzz it's due today ----- Would Shining light on the reaction increase or decrease the reaction rate
tangare [24]

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increase

Explanation:

Reactions that are initiated by light are called photochemical reactions. The brighter the light, the faster the reaction.

7 0
3 years ago
Read 2 more answers
0.70 g of hydrogen chloride (HCl) is dissolved in water to make 5.0 L of solution. What is the pH of the resulting hydrochloric
Zepler [3.9K]

Answer:

( About ) 2.42 pH

Explanation:

First convert grams to mole of the hydrochloric acid,

HCl ( moles ) = 0.7g * ( 1 mole / 36.5g ),

0.7 / 36.5 = ( About ) 0.0192 moles

Now take the moles as a fraction over the given liters, to determine " M, " the apparent pH

M = 0.0192 mole / 5.0 L,

M = 0.00384M

_________________________________________________

Because HCl is a strong acid and will completely ionized, take a look at the steps below,

[ H+ ] = 0.00384M pH = -log[H+] = - log[0.00384],

- log[0.00384] = - ( - 2.41566... )

Solution = ( About ) 2.42 pH

5 0
3 years ago
Limestone CaCo3 decomposes into lime according to the equation below
Anna35 [415]

Answer:

Mass = 19.0 g

Explanation:

Given data:

Mass of limestone react = ?

Mass of lime produced = 11.2 g

Solution:

Balanced chemical equation:

CaCO₃     →      CaO + CO₂

Number of moles of lime:

Number of moles = mass / molar mass

Molar mass of lime 56.1 g/mol

Number of moles = 11.2 g/ 56.1 g/mol

Number of moles = 0.19 mol

Now we will compare the moles of CaO and CaCO₃

                     CaO        :           CaCO₃

                       1             :             1

                     0.19          :          0.19

Mass of limestone react:

Mass = number of moles × molar mass

Mass = 0.19 mol × 100.1 g/mol

Mass = 19.0 g

5 0
3 years ago
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