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Questions in chemistry

📝 Answered - When light energy excites electrons in photosystem II, where do the electrons that replace them come from?

📝 Answered - Two groups of students were tested to compare their speed working on math problems. Each group was given the same problems: one group with calculators and the other group without calculators. What is the: - **Independent variable** - **Dependent variable** - **Constant variable**

📝 Answered - How are covalent bonds formed? Covalent bonds are present in the air you breathe and the water you drink.

📝 Answered - Which element on the periodic table keeps your hair soft and shiny and makes your favourite singers voice come through loud and clear

📝 Answered - 1. What is a hard and symmetrical shape that forms from a solution called? 2. What is the substance that dissolves another substance called?

📝 Answered - Explain why an atom is neutral.

📝 Answered - Choose one property of water that makes it unique. Describe the property and explain the chemical or physical basis behind it.

📝 Answered - How many pairs of electrons does the carbon atom share with each hydrogen atom in the chemical compound methane, which has the formula CH\(_4\)?

📝 Answered - Calculate the amount of heat required to raise the temperature of a 22-g sample of water from 7 degrees Celsius to 18 degrees Celsius.

📝 Answered - Why might fatty acids, amino acids, and nucleic acids increase the hydrogen ion ([tex]H^+[/tex]) concentration of a solution? Explain.