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2 years ago

Most elements occur in nature as a single isotope. TRUE FALSE

Chemistry

2 answers:

cestrela7 [59]2 years ago

8 0

Answer:

false

Explanation:

because elements never exist in nature as single isotopes they are always combined

lubasha [3.4K]2 years ago

4 0

Answer:

FALSE

Explanation:

in the cases of three elements (tellurium, indium, and rhenium) the most abundant isotope found in nature is actually one (or two) extremely long-lived radioisotope(s) of the element, despite these elements having one or more stable isotopes.

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How much energy is lost to condense 300. grams of steam at 100.C?

True [87]

Energy lost to condense = 803.4 kJ

<h3>Further explanation</h3>

Condensation of steam through 2 stages:

1. phase change(steam to water)

2. cool down(100 to 0 C)

1. phase change(condensation)

Lv==latent heat of vaporization for water=2260 J/g

$\tt Q=300\times 2260=678000~J$

2. cool down

c=specific heat for water=4.18 J/g C

$\tt Q=300\times 4.18\times (100-0)=125400$

Total heat =

$\tt 678000+125400=803400~J$

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2 years ago

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$\boxed{\pmb{\color{gold}{\sf{2SO_{2}(g) + O_{2}(g)\dashrightarrow 2SO_{3}(g)}}}}$

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7 0

2 years ago

Read 2 more answers

When two your substances are combined so that each of the pure substances retains its own properties the result is a(n)?A. mixtu

goblinko [34]

Mixture is the answer

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2 years ago

Which of the following molecules have the weakest attraction to each other?<br> F2<br> Cl2<br> Br2

bija089 [108]

Answer:

Explanation:

F2 have the weakest attraction to each other because of higher electronegativity when they are brought close to each other they repel each other

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2 years ago

A scientist is combining two gray elements. He thinks he will get a gray compounds. Use what you learned in this lesson to expla

adelina 88 [10]

Answer:

Explanation:

Depending on the elements that are being combined, a chemical reaction could occur and cause a change of color to take place if the elements reacts to the other one.

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2 years ago