Chemical formulae, equations, calculations
1. This question has 4 part(s).
1.1. This question is about reactions of iron.
Iron can form iron(III) oxide with a chemical formula of Fe2O3.
How many atoms are shown in the formula Fe2O3?
1.2. Calculate the relative formula mass iron(II) hydroxide, Fe(OH)2
(Ar: Fe = 56, O = 16, H = 1)
1.3. Calculate the percentage by mass of iron in iron(II) hydroxide, Fe(OH)2.
1.4. Recent discoveries in the fields of Geology and Seismology have established the potential existence of a previously undiscovered iron oxide compound, FeO2.
This iron oxide requires very high pressures and temperatures to form.
In theory, FeO2 could be formed by the reaction of iron and oxygen, under suitable conditions, as follows.
Fe + O2 → FeO2
How does this reaction demonstrate the law of conservation of mass?
Draw a ring around the correct answers to complete the sentences.
There is/are |
| atom(s) of iron on both sides of the equation |
There is/are |
| atom(s) of oxygen on both sides of the equation |
The total number of atoms |
|
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
No related questions found
