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3 years ago

NEED HELP ASAP! I will post the observation now in different question

Chemistry

1 answer:

ASHA 777 [7]3 years ago

8 0

Answer:

A. NO2 gas released, $NO_{3}^{-}$ ion is present.

The residue is (ZnO) Zn oxide, $Zn^{2+}$ ion is present.

The white salt is Zn(NO3)2.

B. CO2 gas released, $CO_{3}^{2-}$ ion present.

The residue ia (CuO ) Cu(||) oxide, $Cu^{2+}$ ion present .

The green salt is CuCO3.

C. CO2 gas released, $CO_{3}^{2-}$ ion present.

The residue Pb(||) oxide, $Pb^{2+}$ ion is present.

The white salt is PbCO3.

D. CO2 gas released, $CO_{3}^{2-}$ ion present.

The residue is (ZnO) Zn oxide, $Zn^{2+}$ ion is present.

The white salt is ZnCO3.

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noble gases, such as argon and neon, are known for being extremely non-reactive. neon and argon are non-reactive because they

nadezda [96]

They have a complete electronic configuration .their P shell is p6 therefore cannot gain or loose electron.

4 0

3 years ago

The mass of an average blueberry is 0.75 g and the of am automoblie is 2.0 x 10 to the 3 Kg. Find the number of automobiles whos

Paul [167]

Answer : The number of automobiles needed are, $2.26\times 10^{17}$

Explanation :

First we have to calculate the mass of blueberries.

As, 1.0 mole of blueberries contains $6.022\times 10^{23}$ blueberries

So, 0.75 grams of blueberries contains $0.75g\times 6.022\times 10^{23}=4.52\times 10^{23}g$ blueberries

Mass of blueberries = $4.52\times 10^{23}g$

Now we have to calculate the number of automobiles needed.

Number of automobiles needed = $\frac{4.52\times 10^{23}g}{2.0\times 10^{3}kg}$

Number of automobiles needed = $\frac{4.52\times 10^{23}g}{2.0\times 10^{3}\times 10^{3}g}$

Number of automobiles needed = $2.26\times 10^{17}$

Thus, the number of automobiles needed are, $2.26\times 10^{17}$

8 0

3 years ago

What is sodium chloride

DedPeter [7]

Answer:

Sodium chloride, commonly known as salt, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions.

Explanation:

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5 0

3 years ago

Which of the following describes an element? Choose all that apply.

Kisachek [45]

Answer:

A) Gold is an example.

D) There is only one type of substance present.

F) Composed of one type of atom with its own unique properties.

Explanation:

Hello! These are the correct answers! (I took the K12 quiz)

Have a blessed day! :)

5 0

3 years ago

It’s science, the subject is light and color

vladimir1956 [14]

Answer:

22)convex

23)sun (sunlight reflect of the off the surface of the moon

24)because of the way the atmosphere interacts with sunlight

25) transparent : glass,contact lenses,water,air

translucent: wax paper, oil paper, thin sheets

opaque : plastic, wood, leather

26)when light react with opaque: none of it passes though

when it reacts with transparent : it passes through

when it react with translucent : only some of it passes through, the light does not pass directly through the material

Explanation:

24 blue light is scattered in all directions by the tiny molecules of air in earth's atmosphere

8 0

4 years ago

NEED HELP ASAP! I will post the observation now in different question​

NEED HELP ASAP! I will post the observation now in different question