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2 years ago

What element has an atomic number of 53

Chemistry

2 answers:

Novay_Z [31]2 years ago

6 0

Iodine (I) Plz mark brainliest. HOPE THIS HELPS!

Rasek [7]2 years ago

4 0

Iodine ,which has the chemical symbol of I and atomic mass is 126.90.

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T/F. When a molecule contains three bonds and a single lone pair attached to the central atom, the molecular geometry is trigona

lesantik [10]

Answer:

False

Explanation:

In chemistry, trigonal planar is a molecular geometry model with one atom at the center and three atoms at the corners of an equilateral triangle, called peripheral atoms, all in one plane. In an ideal trigonal planar species, all three ligands are identical and all bond angles are 120°.

Meaning there shouldn't be any lone pair.

Look up "Structure of a trigonal planar molecule" for a visual

So it is false.

7 0

2 years ago

Which lists two inorganic substances?

Minchanka [31]

Answer: Sugar and fat

Explanation:

6 0

2 years ago

Read 2 more answers

Annie learns that the compound sulfuric acid is called the universal chemical. The acid is used in everything from gasoline to p

pochemuha

Answer:

D. H2SO4

Explanation:

The chemical formula of a compound is an expression that stares out the elements (in form of symbols)present in a compound and the number of the atoms.

In the image;

There is one sulphur (S) atom, 4 oxygen(O) atoms and 2 hydrogen (H) atoms

The chemical formula is;

H2SO4.

The correct option is option D.

4 0

2 years ago

1. In the investigation of an unknown alcohol, there was a positive Jones test and a negative Lucas test. What deductions may be

pogonyaev

Answer:

1. When observing a positive test for the jones reagent and negative for the Lucas test, it indicates that it is in the presence of a primary alcohol.

Jones reagent behaves like a strong oxidant, where it transforms the primary alcohols into carboxylic acids and the secondary alcohols into ketones. Tertiary alcohols do not react.

With the Lucas test, tertiary alcohols react immediately producing turbidity, while secondary alcohols do so in five minutes. Primary alcohols do not react significantly with Lucas reagent at room temperature.

2. No reaction (See the attached drawing)

3. (see the attached drawing)

7 0

3 years ago

A compound is 80.0% carbon and 20.0% hydrogen by mass. assume you have a 100.-g sample of this compound. the molar mass of the c

ch4aika [34]

Basis of the calculation: 100g

For Carbon:
Mass of carbon = (100 g)(0.80) = 80 g
Number of moles of carbon = (80 g)(1 mole / 12g) = 20/3

For Hydrogen:
Mass of hydrogen = (100 g)(0.20) = 20 g
Number of moles of hydrogen = (20 g)(1 mole / 1 g) = 20

Translating the answer to the formula of the substance,
C20/3H20

Dividing the answer,
CH3

The molar mass of the empirical formula is:
12 + 3 = 15 g/mol

Since, the molar mass given for the molecular formula is 30.069 g/mol, the molecular equation is,
C2H6

ANSWER: C2H6

4 0

3 years ago