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Andrei [34K]
2 years ago
8

Nitric acid with a concentration of 1mol/dm has a pH

Chemistry
1 answer:
goldenfox [79]2 years ago
6 0
Water is neutral with ph 7. when we add water to acidic solution, it will be less acidic. so the pH of acid increases
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A sample of copper absorbs 4.31E+1 kJ of heat, resulting in a temperature rise of 6.71E+1 °C. Determine the mass (in kg) of the
olga2289 [7]

Answer: 1.67 kg

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed=4.31\times 10^1kJ = 43100J   (1kJ=1000J)

m= mass of substance = ?

c = specific heat capacity = 0.385J/g^0C

Change in temperature ,\Delta T=T_f-T_i=6.71\times 10^1^0C=67.1^0C

Putting in the values, we get:

43100J=m\times 0.385J/g^0C\times 67.1^0C

m=1670g=1.67kg   (1kg=1000g)

Thus the mass (in kg) of the copper sample is 1.67

3 0
3 years ago
Which of the following CANNOT be determined by looking at the spectra of a star? *
Rzqust [24]

Answer:

A:temperature

Explanation:

The temperature cannot be determined by looking at the spectra of the star due to lack of the equipment for its measurement. <em>On the other-hand, the remaining statements like the distance from earth, movement towards or away from earth can be determined.</em>

8 0
3 years ago
Predict the precipitate that forms when aqueous solutions of silver nitrate an potassium chloride react to form products in a do
Ket [755]
<span>you'll get silver chloride and potassium nitrate. Both of which are soluble, though so you get no precipitate

I thought all chlorides are soluble? </span>
5 0
3 years ago
The reaction below shows how silver chloride can be synthesized.
Vesna [10]
AgNO_{3} _{(aq)}  +  NaCl_{(aq)}  ----\ \textgreater \   NaNO_{3} _{(aq)}   +  AgCl _{(aq)}
mole ration of AgCl _{(aq)}  :  AgNO_{3} _{(aq)} =  1 : 1

∴ if moles of  AgNO_{3} _{(aq)} =  15.0 mol
then   "      "     AgCl _{(aq)}  =  15.0 mol

∴  the Option  2 is the answer.

5 0
3 years ago
Read 2 more answers
2. Define and describe a mixture using examples.
netineya [11]

A mixture is a substance made by combining two or more different materials in such a way that no chemical reaction occurs.

A mixture can usually be separated back into its original components. Some examples of mixtures are a tossed salad, salt water and a mixed bag of M&M's candy.

5 0
3 years ago
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