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Greeley [361]
3 years ago
9

What is one characteristic of a sample of matter that indicates it is a pure substance?

Chemistry
2 answers:
victus00 [196]3 years ago
8 0

Answer:d

Explanation:

Alexeev081 [22]3 years ago
6 0

Answer:

D

Explanation:

If the composition of a sample is fixed, the sample is a pure substance. According to the law of definite proportions (constant composition), components of a pure substance must be in definite ratios regardless of the source.

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What is the empirical formula for a compound that is 94.1% oxygen and 5.90 % hydrogen?
RSB [31]

Answer:

The empirical formula would be N₂Os * Page 2 Calculate the empirical formulaof a compound that is 94.1% oxygen, 5.9% hydrogen.

6 0
3 years ago
Use the periodic table to identify each of the following bonds as polar or nonpolar.
Molodets [167]

Answer:

Polar  

Step-by-step explanation:

Electronegativity increases from <em>left to right</em> in the Periodic Table.

Cl is further right than C (both tinted pink) in the portion of the Periodic Table below.

Cl is <em>more electronegative</em> than C, so the Cl has a partial negative charge and the C has a partial positive charge.

The C-Cl bond is polar.

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3 years ago
A 1.20 gram sample of a hydrated salt is heated to a constant mass of .80 gram. what is the percent of mass of water contained i
Papessa [141]
The mass of the water is 1.20 - 0.80 = 0.40 grams.

The % of water is (0.40 / 1.20 ) * 100 = 33 1/3% 
7 0
3 years ago
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What is the definition of a common ion as it applies to Le Chatelier’s principle?
navik [9.2K]
The definition of a common ion as it applies to Le Chatelier's principle is an ion that is present in an equilibrium system and a compound added to the system. This is the case since in Le Chatelier's principle, it is based on an equilibrium system and where the reaction shifts to the left or to the right; towards the products or the reactants side.  
6 0
3 years ago
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A galvanic cell at a temperature of is powered by the following redox reaction: 2Cr3 + 3Ca Suppose the cell is prepared with in
stira [4]

Answer:

2.13 V

Explanation:

The balanced equation of the reaction his;

2Cr^3+(aq) + 3Ca(s) -----> 2Cr(s) + 3Ca^2+(aq)

Since this is a galvanic cell then E°cell must be positive. It implies that calcium will be the anode and chromium will be the cathode since calcium is ahead of chromium in the electrochemical series.

E°anode= -2.87 V

E°cathode= -0.74 V

E°cell= E°cathode -E°anode

E°cell= -0.74 -(-2.87)

E°cell = 2.13 V

8 0
2 years ago
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