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3 years ago

Which pair of substances would most likely result in the production of a gas when reacting to an acid

Chemistry

2 answers:

Maslowich3 years ago

8 0

Metal.
Zn + 2HCl = ZnCl₂ + H₂(gas)

daser333 [38]3 years ago

6 0

Answer:

metal and carbonate

Explanation:

edge

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Safety is a concern around electronic equipment of all types. What particular safety hazard may exist A. Laser light B. High vol

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All of the above. If you are going to narrow it down, it would be high voltage and radioactivity.

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3 years ago

Homeostasis means maintaining

Zielflug [23.3K]

Answer:

Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points.

Explanation:

So D. Glad to help! :D

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2 years ago

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What is a substance and what are the two types of substances?

masha68 [24]

A pure substance has a constant composition and cannot be separated into simpler substances by physical means. There are two types of pure substances: elements and compounds. Elements: are pure substances made up of only l type of atom. Atoms of the same element are identical in properties.

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3 years ago

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The total number of sodium atoms in 46.0 grams of solution is?

USPshnik [31]

Molar mass Na = 23g/mol
46g = 456/2 = 2mol
1mol = 6.022*10^23 atoms
2mol = 2*6.022*10623
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3 years ago

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You can practice converting between the mass of a solution and mass of solute when the mass percent concentration of a solution

LUCKY_DIMON [66]

<u>Answer:</u> The mass of solution having 768 mg of KCN is 426.66 grams.

<u>Explanation:</u>

We are given:

0.180 mass % of KCN solution.

0.180 %(m/m) KCN solution means that 0.180 grams of KCN is present in 100 gram of solution.

To calculate the mass of solution having 768 mg of KCN or 0.786 g of KCN (Conversion factor: 1 g = 1000 mg)

Using unitary method:

If 0.180 grams of KCN is present in 100 g of solution.

So, 0.768 grams of KCN will be present in = $\frac{100g}{0.180g}\times 0.768=426.66g$ of solution.

Hence, the mass of solution having 768 mg of KCN is 426.66 grams.

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3 years ago