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Nimfa-mama [501]
3 years ago
14

Question 7 of 32

Chemistry
2 answers:
Sever21 [200]3 years ago
3 0

Answer:O D to protect the environment from harmful chemicals

Explanation:

ASHA 777 [7]3 years ago
3 0
D.) to protect the environment from harmful chemicals
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The Groups 1 and 2 on the periodic table contain what atom type?
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Non metals
and metals
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The reaction A → products is first order. If the initial concentration of A is 0.646 M and, after 72.8 seconds have elapsed, the
mario62 [17]

Answer: 0.00867 moldm-3

Explanation:

Since the reaction is 1st order,

Rate of reaction=∆[A]÷t

0.646-0.0146/72.8= 0.00867

Remember that in a first order reaction, the rate of reaction depends on change in the concentration of only one of the reaction species, A in the problem above.

5 0
3 years ago
Copper has a density of 8.96 g/cm3. If a thin sheet of copper measures 5.5 cm by 5.5 cm and has a mass of 12.96 g, what is its t
balandron [24]

Thickness of cooper sheet is 0.048 cm (Approx.)

Given that;

Density of copper = 8.96 g/cm³

Measures of copper sheet = 5.5 cm × 5.5 cm

Mass of of copper sheet = 12.96 gram

Find:

Thickness of cooper sheet

Computation:

Volume = Mass / Density

Volume of cooper = 12.96 / 8.96

Volume of cooper = 1.4464

Volume of cooper = 1.45 cm³ (Approx.)

Volume of cooper sheet = 5.5 cm × 5.5 cm x Thickness

5.5 cm × 5.5 cm x Thickness = 1.45

Thickness of cooper sheet = 0.04793

Thickness of cooper sheet = 0.048 cm (Approx.)

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brainly.com/question/24235924?referrer=searchResults

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Which of these is a base?
sergejj [24]
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A compound is found to contain 33.3%
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Answer: CaSO3

Explanation:Please see attachment for explanation

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3 years ago
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