David Kindness is a Certified Public Accountant (CPA) and an expert in the fields of financial accounting, corporate and individual tax planning and preparation, and investing and retirement planning.

Here you can find CCEA past papers for GCSE Chemistry (Single Science). Use the links below to download question papers and mark schemes (which contain the answers). If you’re unsure whether you need ...

convert the numbers from standard form into decimal form or ordinary numbers complete the calculation convert the answer back into standard form Calculate \((4 \times 10^9) \times (7 \times 10^{-3})\) ...

Surface chemistry is the study of chemical reactions at surfaces and interfaces. Appreciating how molecules and atoms interact with surfaces and with each other while on surfaces is key to ...

Marine chemistry is the study of the chemical composition and chemical processes of the world’s oceans. Some of the key processes studied are the cycling of: inorganic and organic carbon; nutrients, ...

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Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Charlene Rhinehart is a CPA , CFE, chair of an Illinois CPA Society committee, and has a ...