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trasher [3.6K]
3 years ago
10

When is the principle of conservation of mass true? A. Only for reactions that take place in open systems. B. Only for reactions

that take place in closed systems. C. For reactions that involve solids, but not gases. D. For reactions in both open and closed systems.
Chemistry
1 answer:
timurjin [86]3 years ago
8 0

When is the principle of conservation of mass true?

B. Only for reactions that take place in closed systems.

Hope this answers your question!

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Which state of matter has the following physical properties:
Nadya [2.5K]
The state of matter is Liquid
Explanation:

The density of water is roughly 1 gram per milliliter but, this changes with temperature or if there are substances dissolved in it. Ice is less dense than liquid water which is why your ice cubes float in your glass. As you might expect, water density is an important water measurement.
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Which combination can be used to make a buffer with a pH of 4.2? The Ka of benzoic acid, C6H5COOH, is 6.5×10^–5 and the Ka of hy
ankoles [38]

50.0 mL of 0.500 M HCN and 25.0 mL of 0.500 M sodium hydroxide combination can be used to make a buffer with a pH of 4.2. The KK

an of benzoic acid, C6H5COOH, is 6.5×10-5 and the an of hydrocyanic acid, HCN, is 4.9×10-10.

Benzoic acid

A white (or colourless) solid with the chemical formula C6H5CO2H, benzoic acid is pronounced: "bnzo.k." The simplest aromatic carboxylic acid is this one. The term comes from gum benzoin, which was the substance's exclusive source for a very long period. Many plants naturally contain benzoic acid, which is used as an intermediary in the formation of numerous secondary metabolites[9]. Benzoic acid salts are employed as food preservatives. An essential starting point for the industrial synthesis of many other chemical compounds is benzoic acid. The term "benzoates" refers to the salts and esters of benzoic acid.

To learn more about benzoic acid refer here:

brainly.com/question/24052816

#SPJ 4

8 0
1 year ago
A force between charged objects
Darya [45]

Answer:

Coulomb's law, mathematical description of the electric force between charged objects. Formulated by the 18th-century French physicist Charles-Augustin de Coulomb, it is analogous to Isaac Newton's law of gravity.

Explanation:

Soo yeah I think this can help you

3 0
3 years ago
Name the following ionic compounds: (a) Na2SO4, (b)Cu(NO3)2 (c) Fe2(CO3)3
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Answer and Explanation:

(a) Na_2So_4 : its chemical name is sodium sulfate in which sodium is present as Na_2^+ and sulfate is present as So_4^{2-}

(b) Cu(NO_3)_2 : Its chemical name is copper nitrate which is a inorganic compound which is mostly crystalline in nature

(c)Fe_2(Co_3)_2 : Its chemical name is iron carbonate or ferric carbonate

5 0
4 years ago
Which of the following statements is FALSE?
Jobisdone [24]

Answer:

Option C is false statement. The half life of a second order reaction is not dependent on concentration.

Explanation:

Half life of a reaction is defined as the amount of time which is required for a reactant concentration reduced by half comparison to its initial concentration.

Half life of a second order reaction is depend on the initial concentration of a reaction, in contrast to 1st order reaction.

7 0
3 years ago
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