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alexgriva [62]
3 years ago
8

Which statement is true of a chemical change? (Plato)

Chemistry
2 answers:
MrRa [10]3 years ago
6 0

Answer: i think A

Explanation: if i got it right could you mark me as brainliest

OleMash [197]3 years ago
5 0

Answer:

A

Explanation:

The answer A is the best answer because it contains the most general characteristic of a chemical change.

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A(g) + b(g) => ab(g), the rate is 0.239 mol/l.s when the initial concentrations of both a and b are 2.00 mol/l. if the reacti
Vesna [10]

Answer:

Rate ≅ 1.01 M/s (3 sig. figs.)

Explanation:

Given A(g) + B(g) => AB(g)

Rate = k[A(g)][B(g)]²

at Rate (1) = 0.239M/s = k[2.00M][2.00M]² => k = (0.239M/s) / (2.00M)(2.00M)²

k = 0.29875 M⁻²·s⁻¹

Rate (2) =  k[A(g)][B(g)]² = (0.29875M⁻²·s⁻¹)(4.81M)(2.65M)² = 1.009124472 M/s (calc. ans.) ≅ 1.01 M/s (3 sig. figs.)

4 0
3 years ago
A solution that contains a small amount of salt and a large amount of water is said to be a?
artcher [175]
The answer is dilute. A dilute salt solution contains a small amount of salt with high water concentration while a concentrated salt solution has a large amount of salt with a lower water concentration. Salt is inorganic hence it is not monounsaturated, which is a term related to organic compounds. The salt is unable to dissolve anymore in a saturated salt solution, leaving the undissolved salt at the bottom and this is not the case here since we only have a small amount of salt. 
6 0
3 years ago
The periodic table has undergone some changes since it was first introduced. List three ways the modern periodic table differs f
Hoochie [10]
One of the differences I can think of is that hydrogen is no longer listed as a group I element.

According to the mendeleev tables that I looked up, hydrogen is catorgrized as a group I element, along with Lithium, sodium, Potassium etc. However, nowadays, hydrogen does not belong to any groups in the periodic table. This is because there are arguments about whether hydrogen belongs to group I. Group I elements are all alkali metals, while hydrogen is not. However, some people says that hydrogen only have one outer shell electron so it should be in group I. Some people even say hydrogen should belong to group VII because it only needs one more electron in order to achieve the duplet of electrons.

Therefore as you may notice, hydrogen in modern periodic tables are put in the center of the periodic table on the top.
6 0
3 years ago
what is the name of the collection of elements on the right side of the periodic table with electrons sequentially filling orbit
lbvjy [14]
Do u mean column 18? then it is Noble gases
5 0
3 years ago
What 4 elements did people originally think made up everything?
ioda

Earth, Air, Water, and Fire

4 0
3 years ago
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