A 13.0% solution of K2CO3 by mass has a density of 1.09 g/cm3. Calculate the molality of the solution.

Signs and symptoms of mental illness can vary, depending on the disorder, circumstances and other factors. Mental illness symptoms can affect emotions, thoughts and behaviors.

Examples of signs and symptoms include:

Feeling sad or down

Confused thinking or reduced ability to concentrate

Excessive fears or worries, or extreme feelings of guilt

Extreme mood changes of highs and lows

Withdrawal from friends and activities

Significant tiredness, low energy or problems sleeping

Detachment from reality (delusions), paranoia or hallucinations

Inability to cope with daily problems or stress

Trouble understanding and relating to situations and to people

Problems with alcohol or drug use

Major changes in eating habits

b is the correct