How many moles of oxygen atoms are in 1 mole of carbon dioxide, CO₂?
- A1
- B3
- C2
- D0,5
How many moles of oxygen atoms are in 1 mole of carbon dioxide, CO₂?
Which method separates two liquids with different boiling points, such as alcohol and water?
عند مستوى سطح البحر، عند أي درجة حرارة يغلي الماء النقي؟
A radioactive isotope has a half-life of 5 days. A sample starts with 80 g. How much is left after 10 days?
أي تغيير يجعل قطعة طباشير تتفاعل مع حمض أسرع؟
In a closed container, 10 g of substance A reacts completely with 5 g of substance B. What is the total mass of the products?
A solution has a hydroxide ion concentration of 1 × 10⁻³ mol/L. What is its pH at 25 °C?
In the fission reaction ²³⁵U + ¹n → ¹⁴¹Ba + ⁹²Kr + ? ¹n, how many neutrons are released?
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