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3 years ago

The larger the energy difference between reactants and products (ΔE), the slower the rate of reaction. true or false

Chemistry

1 answer:

Nikitich [7]3 years ago

8 0

Answer: true

Explanation:

In chemical reactions, an energy barrier exists between reactants and products. The magnitude of this energy barrier determines the rate of reaction. A lesser energy barrier implies that reactants are converted to products faster since the energy required is not too much. On the other hand, a large energy difference between reactants and products will lead to a slow reaction with very poor yield of products if any.

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Which of the following is an example of a compound?<br><br> CaCl2<br><br> Na<br><br> Nd<br><br> Cu

madam [21]

CaCl2

All of the other choices are elements

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3 years ago

A vessel of volume 100ml contains 10% of oxygen and 90% of an unknown gas. The gases diffuses in 86 second through a small hole

swat32

The molecular weight of unknown gas : 23.46 g/mol

<h3>Further explanation</h3>

Given

A vessel contains 10% of oxygen and 90% of an unknown gas.

diffuses rate of mixed gas = 86 s

diffuses rate of O₂ = 75 s

Required

the molecular weight of unknown gas (M)

Solution

The molecular weight of mixed gas :(M O₂=32 g/mol)

$\tt 0.1\times 32+0.9\times M=3.2+0.9M$

Graham's Law :

$\tt \dfrac{r_{O_2}}{r_{mixed~gas}}=\sqrt{\dfrac{M_{mixed}}{M_{O_2}} }\\\\\dfrac{75}{86}=\sqrt{\dfrac{3.2+0.9M}{32} }\\\\0.76=\dfrac{3.2+0.9M}{32}\\\\24.32=3.2+0.9M\\\\21.12=0.9M\rightarrow M=23.46~g/mol$

7 0

3 years ago

7th grade science help me plsssss

tigry1 [53]

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(example) Humans, squids, mushrooms, and vascular plants

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All people with AIDS

3. Community: (description) A community is a social unit with commonality such as norms, religion, values, customs, or identity. Communities may share a sense of place situated in a given geographical area or in virtual space through communication platforms.

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(example) An example of the biosphere is where live occurs on, above and below the surface of Earth.

mark me brainliestttt :)))

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3 years ago

An atom of chlorine has several valence electrons in its

RUDIKE [14]

7 valence electrons in an atom

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3 years ago

Which of the following best defines Avogadro's number? (5 points)

Likurg_2 [28]

Answer:

Avogadro's number is 6.022* 10^23

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3 years ago

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