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Setler79 [48]
2 years ago
12

Where do properties of matter come from?

Chemistry
1 answer:
Korolek [52]2 years ago
8 0

Answer:

Extensive or inextinsive and either physical or chemical

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How many grams of barium sulfate can be produced from the reaction of 2.54 grams sodium sulfate and 2.54 g barium chloride? Na2S
Rama09 [41]

Answer: 2.796 grams

Explanation:

Na_2SO_4+BaCl_2\rightarrow 2NaCl+BaSO_4

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

\text{Number of moles of sodium sulphate}=\frac{2.54g}{142g/mol}=0.018moles

\text{Number of moles of barium chloride}=\frac{2.54g}{208g/mol}=0.012moles

According to stoichiometry:

1 mole of BaCl_2 reacts with 1 mole of Na_2SO_4

0.012 moles of BaCl_2 will react with=\frac{1}{1}\times 0.012=0.012moles of Na_2SO_4

Thus BaCl_2 is the limiting reagent as it limits the formation of product. Na_2SO_4  is the excess reagent as (0.018-0.012)=0.006 moles are left unused.

1 mole of BaCl_2 produces 1 mole of BaSO_4

0.012 moles of BaCl_2 will produce=\frac{1}{1}\times 0.012=0.012moles of BaSO_4

Mass of BaSO_4=moles\times {\text {Molar mass}}=0.012\times 233=2.796g

Thus 2.796 grams of BaSO_4  are produced.

6 0
4 years ago
Which of the following best describes the valence electrons in a polar
Ghella [55]

Answer:

C. The electrons are closer to the atom with the higher

electronegativity.

Explanation:

In a covalent bond, the electrons are shared equally when the atoms involved have the same electronegativity. However, when there are differences of electronegativity between those atoms, the electrons preferred are closer to the atom with the higher electronegativity.

5 0
4 years ago
Help pleaseeeeee. dbdb​
maks197457 [2]

Answer:

no way

Explanation:

more free points

3 0
3 years ago
Where does oxidation and reduction take place in the reaction of Br2 + 2I- → 2Br + I2
Shkiper50 [21]
Okay, let's look at the oxidation number of each substance.
-Br2 has an oxidation number of 0 because it is in a stable form.
- I- has a -1 charge and thus has an oxidation number of -1.
- 2Br- has a -1 charge also
- I2 has an oxidation number of 0 as well.

Bromine goes from 0 to -1 and Iodine goes from -1 to 0.
Therefore, Bromine is having an electron added whilst Iodine is having an electron removed.

Oxidation is Loss of electrons so Iodine is being oxidised, Reduction is Gain of electrons so Bromine is being reduced. 
5 0
4 years ago
Explain how friction and mass affect the motion of an object.
agasfer [191]

Answer: Ithink that the mass is the one that affects the friction.

Explanation:

8 0
3 years ago
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