4 years ago

Say no for polythene bags and say yes for paper bags. Comment on this slogan

Chemistry

1 answer:

Anarel [89]4 years ago

7 0

Answer:

Yes

Explanation:

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How much heat energy is required to raise the temperature of 0.367 kg of copper from 23.0 C to 60.0 C ? The specific heat of cop

mojhsa [17]

Note: We must keep the units we use consistent. The Cp is given in cal/gC so we will use cal for energy, grams for mass and C for temperature.
1)
Heat supplied can be calculated using:
Q = mCpΔT; where m is the mass, Cp is the specific heat capacity and ΔT is the temperature change.
Q = 367 x 0.092 x (60 - 23)
Q = 125 Cal

2)
Using the same equation:
125 = 60 x 0.092 x (T - 23)
T = 45.6 C

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3 years ago

A change in the force of gravity on an object will affect its what

Gnoma [55]

A change in the force of gravity on an object will affect its weight.

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3 years ago

A pool owner adds a compound containing chlorine to the pool to disinfect it. However, too much of the compound is added. As a r

MrMuchimi

Answer: He could add a base to the pool to neutralize the acid.

Explanation:

Chlorine is used to disinfect the pools as it produces hypochlorous acid in water. This hypochlorous acid is unstable and gives hydrochloric acid and nascent oxygen which is used to disinfect.

$Cl_2+H_2O\rightarrow HOCl$

$HOCl\rightarrow HCl+O$

The excess acid is neutralized by adding base which produces salt and water and thus decrease the acidity.

$Acid+Base\rightarrow Salt+water$

Adding more acid would increase the acidity further.

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3 years ago

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Which of the following is true about limiting and excess reagents?<br><br> Links are reported

Dafna1 [17]

Answer:

the first one

Explanation:

I take this subject

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3 years ago

To prepare 300.0 ml of 0.2 m nacl how many grams of nacl should be weighed out?

Leokris [45]

One mole of NaCl weighs 58.44 grams
Therefore 1L of one mole of NaCl contains 58.44 grams
1L of 0.2m NaCl contains 58.44x0.2 = 11.69grams
300mL of 0.2m NaCl contains 11.69x0.3 = 3.51 grams

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3 years ago