Chemistry screen shot below plzzzzzzz help i've been stuck forever

For each item: classify organic or inorganic.

Sloan [31]

Answer 1) : NaCl - Sodium chloride is an inorganic salt.

Explanation : There is no carbon present in this molecule so, it can be referred as inorganic substance. Sodium Chloride contain Sodium and Chloride ions, the absence of carbon atom in the molecule makes this substance inorganic.

Answer 2) Phenol $C_{6}H_{6}O$ - Phenol is an organic moiety.

Explanation : The presence of carbon bonded with hydrogen and oxygen makes the phenol compound as organic substance. Carbon here is present in large amount and imparts the organic character in phenol.

Answer 3) $C_{2}H_{6}$ - Ethane is an organic compound.

Explanation : Ethane is an organic compound which contains carbon in its molecule and is covalently bonded with hydrogens present in the molecule. The presence of carbon makes the molecule as organic substance.

Answer 4) $Ca_{3}(PO_{4})_{2}$ - Inorganic compound.

Explanation : Calcium phosphate is an inorganic compound which does not contains carbon atom in its molecule. The absence of carbon atom makes the compound inorganic. This calcium phosphate molecule only contains the molecules of calcium and phosphate in it.

Answer 5) Formaldehyde $CH_{2}O$ - It is an organic compound.]

Explanation : Formaldehyde contains one molecule of carbon and two molecules of hydrogen along with one molecule of oxygen in it. The presence of carbon covalently bonded with hydrogen and oxygen makes it as an organic compound.

Answer 6) $MgCO_{3}$ - Magnesium carbonate is an inorganic compound.

Explanation : Magnesium carbonate is inorganic substance as it does not contains carbon in its molecule. It only contains the molecules of magnesium and carbonate in it, which qualifies it to be called as inorganic compound.

Answer 7) $Vitamin D_{2}$ $(C_{27}H_{40}O)$ - It is organic compound.

Explanation : $Vitamin D_{2}$ $(C_{27}H_{40}O)$ it contains 27 molecules of carbon atoms which are covalently bonded with 40 molecules of hydrogen and a molecule of oxygen in its structure. Therefore, it can be called as organic.

Answer 8) Mercury Sulfate HgS - Inorganic compound.

Explanation : Mercury sulfate does not contains carbon in its molecular structure, which makes it as inorganic compound. It only contains the molecules of mercury and sulfate ions.

Answer 9) Butane $C_{4}H_{10}$ - Organic compound.

Explanation : Butane contains 4 molecules of carbon which is covalently bonded with 10 molecules of hydrogen. The presence of carbon in its molecular structure makes butane as an organic compound.

Answer 10) Sand $SiO_{2}$ - Inorganic compound.

Explanation : Sand which has the molecular formula as $SiO_{2}$ does not contains carbon atom in its molecule. It just contains the molecules of silicon and two molecules of oxygen in it.

Answer 11) Water $H_{2}O$ - It is an inorganic compound.

Explanation : Water molecule does not contains carbon in its molecule therefore, it is an inorganic compound. It contains only two molecules of hydrogen and one molecule of oxygen in it.

6 0

3 years ago

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Question 10

bixtya [17]

The reaction that should be followed is
Na2SO4 + Ca(NO3)2 --> CaSO4 + 2NaNO3
first calculate the limiting reactant
mol Na2SO4 = 0.075 L (1.54×10−2 mol / L) = 1.155x10-3 mol

mol Ca(NO3)2 = 0.075 L (1.22×10−2 mol / L) = 9.15x10-4 mol
so the limiting reactant is the Ca(NO3)2

so all of the Ca2+ will be precipitated, percentage unprecipitated = 0.00 %

5 0

4 years ago

What direction does oxygen go in the plant cells

Katen [24]

The direction oxygen goes is out of the cell. It secretes it.

8 0

3 years ago

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Calculate the empirical formula for each stimulant based on its elemental mass percent composition.

Vanyuwa [196]

A.
elements    C    H    N
percentage composition    74.03    8.70 17.27
Molecular mass 12    1    14

# of mole    6.17    8.70    1.23

÷smallest mole    5.0 7.0 1.0

mole ratio    5    : 7    ; 1

THE EMPERICAL FORMUKLA FOR A. IS C5H7O

NOTE: #of mole = percentage composition ÷ Mr
and the ÷ smallest mole is used to find the ratio...for the above question a. it is 1.23

and b. should be done using the same procedure

3 0

3 years ago

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An atom of an element has 54 protons. Some of the elements atoms have 77 neutrons, while other atoms have 79 neutrons. What are

Alja [10]

Answer:

The atomic numbers of both are 54 while the mass numbers are 131 and 133 respectively.

Explanation:

- The number of protons = Atomic number. So, if the atom has 54 protons and it remained unchanged, then the two types of atoms of this element both have atomic numbers of 54.

- On the other hand, mass number is the sum of protons and neutrons

So, if type 1 has protons = 54 and neutrons = 77: mass number = 54 + 77 = 131

if Type 2 has protons = 54 and neutrons = 79: mass number = 54 + 77 = 133

(Since the possibility of atoms of the same element to have different mass numbers but the same atomic number is called isotopy). The two types of atoms with mass numbers 131 and 133 described are isotopes.

7 0

3 years ago