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katovenus [111]
3 years ago
10

There are many ways that you can tell whether a chemical change has occurred. Which of the following is NOT a sign of chemical c

hange?
-presence of bubbles
-liquid boiling
-change in color
-a release of an odor
Chemistry
2 answers:
Vesnalui [34]3 years ago
7 0

Answer:

liquid bolling

Explanation:

because it just using heat.

Delicious77 [7]3 years ago
6 0
Liquid boiling is not a sign of chemical change!
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Which statement is true about a liquid but not a gas?
vovangra [49]

Answer:

I think its D

Explanation:

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3 0
3 years ago
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39. Period is the force of attraction between objects resulting in objects pulling towards each
storchak [24]

Answer:

True

Explanation:

if there was nothing to avoid of objects pulling towards one another many results may happen

8 0
3 years ago
The heat capacity of an object depends on its ______
sdas [7]

Answer:

mass I hope can help this answer

Explanation:

keep on learning

6 0
3 years ago
1.65g of zinc is used to make 8g of zinc iodide. How much iodine is required for this reaction?
creativ13 [48]

Answer:

6.45 g of iodine, I₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Zn + I₂ —> ZnI₂

Next, we shall determine the mass of Zn and I₂ that reacted from the balanced equation. This can be obtained as follow:

Molar mass of Zn = 65 g/mol

Mass of Zn from the balanced equation = 1 × 65 = 65 g

Molar mass of I₂ = 127 × 2 = 254 g/mol

Mass of I₂ from the balanced equation = 1 × 254 = 254 g

SUMMARY:

From the balanced equation above,

65 g of Zn reacted with 254g of I₂.

Finally, we shall determine the mass of f I₂ needed to react with 1.65 g of Zn. This can be obtained as follow:

From the balanced equation above,

65 g of Zn reacted with 254g of I₂.

Therefore, 1.65 g of Zn will react with = (1.65 × 254)/65 = 6.45 g of I₂.

Thus, 6.45 g of iodine, I₂ is needed for the reaction.

4 0
3 years ago
TRIPLE POINTS!!! I NEED HELP!!! PLEASE EXPLAIN TOO!!! What is the energy of a quantum of light with a frequency of 4.31 x 1014 1
Lelechka [254]

Answer:

The answer is

2.86 \times  {10}^{ - 19}  \: J

Explanation:

The energy of a quantum of light can be found by using the formula

<h3>E = hf</h3>

where

E is the energy

f is the frequency

h is the Planck's constant which is

6.626 × 10-³⁴ Js

From the question

f = 4.31 × 10¹⁴ Hz

We have

E = 4.31 × 10¹⁴ × 6.626 × 10-³⁴

We have the final answer as

2.86 \times  {10}^{ - 19}  \: J

Hope this helps you

3 0
3 years ago
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