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Law Incorporation [45]
2 years ago
10

Who is generally credited with developing the process of using heat?

Chemistry
1 answer:
galina1969 [7]2 years ago
6 0

Answer:

Robert Boyle

Explanation:

I think it's that

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Answer:

Explanation:

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4 0
2 years ago
Read 2 more answers
When most large food molecules are heated, they:
shutvik [7]

C. bond with each other

3 0
3 years ago
I need someone to answer this ASAP please!
yan [13]

Answer:

239.15. OR round down 239

Explanation:

3 0
3 years ago
Read the examples below and determine if it describes speed, velocity or acceleration.
Zarrin [17]

Answer:

hmmmmmmmmmmmmmmmmmmm

Explanation:

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8 0
2 years ago
A standard lanthanum solution is prepared by dissolving 0.1968 grams of lanthanum oxide (La2O3) in excess nitric acid and diluti
sweet-ann [11.9K]

Answer:

1.208x10⁻³M and 392.5ppm La(NO3)3

Explanation:

The reaction that occurs is:

La2O3 + 6HNO3 → 2La(NO3)3 + 3H2O

Molarity is defined as the moles of solute (In this case, LaO3) per liter of solution. And ppm, are mg of solute per liter of solution.

To solve this question we must find the moles of La(NO3)3 produced and its mass in milligrams to find molarity and ppm:

<em>Moles La2O3 -Molar mass: 325.81g/mol-</em>

0.1968g * (1mol / 325.81g) = 6.04x10⁻⁴ moles La2O3

<em>Moles La(NO3)3:</em>

6.04x10⁻⁴ moles La2O3 * (2mol La(NO3)3 / 1mol La2O3) = 1.208x10⁻³ moles La(NO3)3

<em>Molarity:</em>

1.208x10⁻³ moles La(NO3)3 / 1L =

<h3>1.208x10⁻³M</h3>

<em>Mass La(NO3)3 -Molar mass: 324.92g/mol-</em>

1.208x10⁻³ moles La(NO3)3 * (324.92g / mol) = 0.392.5g La(NO3)3

In mg:

392.5mg La(NO3)3 / 1L =

392.5ppm La(NO3)3

7 0
3 years ago
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