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3 years ago

Help please, I will give brainliest!! ^^

Chemistry

1 answer:

AVprozaik [17]3 years ago

3 0

Answer:

b molartiary will decrease

Explanation

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Zn + AgCI - ZnCl2 + - Ag HELPPP?

garik1379 [7]

Answer:

Explanation: Zn (s) + 2 AgCl (s) ⇒ ZnCl2 (s) + 2 Ag(s)

Less noble Zinc reduces more noble Silver

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3 years ago

Urgent help needed please!Write the electron configuration for vanadium. (Use superscript and proper formatting for full credit.

alexandr402 [8]

Answer:

Ar 3d3 4s2 is the electron configuration for Vanadium.

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3 years ago

KNO3(s) --> K+(aq) + NO3-(aq)This reaction was carried out in a Styrofoam insulated calorimeter and the following data were r

nataly862011 [7]

Answer:

Equation correctly showing the heat of solution

$KNO_3(s)+35.2 kJ \rightarrow K^+(aq) + NO_{3}^-(aq)$

Explanation:

Mass of aqueous solution = m = 100 g

Specific heat of solution = c = 4.18 J/gºC

Change in temperature = $\Delta T=T_f-T_i$

ΔT = 21.6ºC - 30.0ºC = -8.4ºC

Heat lost by the solution = Q

$Q = mc\Delta T$

$Q=100 g\times 4.18 J/g^oC\times (-8.4^oC)$

Q = -3,511.2 J ≈ -3.51 kJ

Heat absorbed by potassium nitrate when solution in formed; Q'

Q' = -Q = 3.51 kJ

Moles of potassium nitrate , n= $\frac{10.1 g}{101 g/mol}=0.1 mol$

$KNO_3(s)\rightarrow K^+(aq) + NO_{3}^-(aq)$

The heat of solution =

$\frac{Q'}{n}=\frac{3.5112 kJ}{0.1 mol}=35.1 kJ/mol$

So, the equation correctly showing the heat of solution

$KNO_3(s)+35.2 kJ \rightarrow K^+(aq) + NO_{3}^-(aq)$

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4 years ago

Systematic error is defined as:_______.

Andru [333]

Answer:

The correct answer is option d.

Explanation:

It is defined as repeatable and consistent error associated with a faulty equipment. It a fixed amount of deviation of a measurement from the actual measurement.

These error usually caused by incorrectly calibrated instruments or by an incorrect use of the instruments.

For example: observational error , interference of environment etc.

5 0

4 years ago

Which organic compound listed below does not have a carbonyl group ?

Free_Kalibri [48]

I believe the answer is F

3 0

3 years ago