Calculating Mass of Substances
1. This question has 5 part(s).
1.1. This question is about elements in Group 2.
A teacher burns magnesium in oxygen, O2.
Complete the word equation for the reaction.
magnesium + oxygen ⟶ ___________________
1.2. Balance the equation for the reaction between magnesium and oxygen.
___Mg + O2 → ___MgO
1.3. The teacher reacts calcium with water.
Ca + 2H2O → Ca(OH)2 + H2
How many moles of reactant and product are there in this reaction?
Moles of reactant = __________
Moles of product = __________
1.4. According to the symbol equation, how many calcium atoms are present at the start of this reaction?
Tick (✓) one box.
6.02 x 10–23 | |
6.23 x 10–23 | |
6.02 x 1023 |
1.5. According to the symbol equation, how many hydrogen atoms are present in the hydrogen gas produced during this reaction?
Tick (✓) one box.
6.02 x 10–23 | |
6.02 x 1023 | |
1.20 x 1024 | |
1.20 x 10–24 |
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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