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How many grams of oxygen can be prepared by the decomposition of 12 g of mercury (II) oxide? ( Atomic mass: Hg = 200 g/mol, oxygen= 16 g/mol.)
Anonymous Quiz
24%
0. 18 g
41%
12. 26 g
15%
0. 434 g
20%
0. 88 g
Forwarded from Exam Hub - High School
แ‰ตแˆแˆ…แˆญแ‰ต แˆšแŠ’แˆตแ‰ดแˆญ แค " แ‹จแ‹šแˆ… แŠ แˆ˜แ‰ต แ‹จ12แŠ› แŠญแแˆ แˆ€แŒˆแˆญ แŠ แ‰€แ แˆแ‰ฐแŠ“ แˆ˜แ‰ถ แ‰ แˆ˜แ‰ถ แ‰ แ‰ แ‹ญแА แˆ˜แˆจแ‰ฅ แ‹ญแˆฐแŒฃแˆ " แŠ แˆˆแข

แ‹จ2018 แ‹จ12แŠ› แŠญแแˆ แˆ›แŒ แŠ“แ‰€แ‰‚แ‹ซ แˆ€แŒˆแˆญ แŠ แ‰€แ แˆแ‰ฐแŠ“ แˆ˜แ‰ถ แ‰ แˆ˜แ‰ถ แ‰ แ‰ แ‹ญแА แˆ˜แˆจแ‰ฅ แˆˆแˆ˜แˆตแŒ แ‰ต แ‹จแˆšแ‹ซแˆตแ‰ฝแˆ แ‰…แ‹ตแˆ˜ แ‹แŒแŒ…แ‰ต แŠฅแ‹จแ‰ฐแ‹ฐแˆจแŒˆ แˆ˜แˆ†แŠ‘แŠ• แˆšแŠ’แˆตแ‰ดแˆฉ แŒˆแˆแŒฟแˆแข

แ‹จแ‰ตแˆแˆ…แˆญแ‰ต แˆšแŠ’แˆตแ‰ตแˆฉ แ•แˆฎแŒแˆฐแˆญ แ‰ฅแˆญแˆƒแŠ‘ แАแŒ‹ " แ‰ แ‹šแˆ… แ‹“แˆ˜แ‰ต แ‹จแˆšแˆฐแŒ แ‹ แ‹จ12แŠ› แŠญแแˆ แˆ›แŒ แŠ“แ‰€แ‰‚แ‹ซ แˆแ‰ฐแŠ“ แˆ˜แ‰ถ แ‰ แˆ˜แ‰ถ แ‰ แ‰ แ‹ญแА แˆ˜แˆจแ‰ฅ แ‹ญแˆฐแŒฃแˆ " แˆฒแˆ‰ แ‰ฐแŠ“แŒแˆจแ‹‹แˆแข

แ‹ญแˆ…แŠ• แ‹ซแˆ‰แ‰ต แ‰ แŠ แŒ แ‰ƒแˆ‹แ‹ญ แ‰ตแˆแˆ…แˆญแ‰ต แˆแˆ›แ‰ต แ‹˜แˆญแ แ‹จแŒแˆ›แˆฝ แ‹“แˆ˜แ‰ต แŠ แˆแƒแ€แˆ แˆ˜แ‹ตแˆจแŠญ แˆ‹แ‹ญ แ‰ฐแŒˆแŠแ‰ฐแ‹ แАแ‹แข

แ‰ฃแˆˆแ‰แ‰ต แˆแˆˆแ‰ต แ‹“แˆ˜แ‰ณแ‰ต แˆแ‰ฐแŠ“แ‹ แ‰ แ‹ˆแˆจแ‰€แ‰ตแŠ“ แ‰ แ‰ แ‹ญแА แˆ˜แˆจแ‰ฅ แˆฒแˆฐแŒฅ แŠฅแŠ•แ‹ฐแАแ‰ แˆญ แŠ แŠ•แˆตแ‰ฐแ‹ แ‰ แ‹šแˆ… แ‹“แˆ˜แ‰ต แ‹จแˆšแˆฐแŒ แ‹แŠ• แˆ›แŒ แŠ“แ‰€แ‰‚แ‹ซ แˆแ‰ฐแŠ“ แˆ™แˆ‰ แ‰ แˆ™แˆ‰ แ‰ แ‰ แ‹ญแА แˆ˜แˆจแ‰ฅ แˆˆแˆ˜แˆตแŒ แ‰ต แ‹จแˆšแ‹ซแˆตแ‰ฝแˆ แ‰…แ‹ตแˆ˜ แ‹แŒแŒ…แ‰ต แŠฅแ‹จแ‰ฐแ‹ฐแˆจแŒˆ แŠฅแŠ•แ‹ฐแˆ†แА แŒ แ‰แˆ˜แ‹‹แˆแข

แˆˆแ‹šแˆ…แˆ แ‹จแ‰ฐแˆˆแ‹ซแ‹ฉ แŒแ‰ฅแ‹“แ‰ถแ‰ฝ แˆˆแŠญแˆแˆŽแ‰ฝ แ‹ตแŒ‹แ แŠฅแ‹จแ‰ฐแ‹ฐแˆจแŒˆ แˆ˜แˆ†แŠ‘แŠ• แŒ แ‰…แˆฐแ‹ แ‰ แˆแ‰ฐแŠ“ แŒฃแ‰ขแ‹ซแ‹Žแ‰ฝ แ‰ แ‰‚ แ‹จแŠขแŠ•แ‰ฐแˆญแŠ”แ‰ต แŠ แ‰…แˆญแ‰ฆแ‰ต แŠฅแŠ•แ‹ฒแŠ–แˆญ แŠจแŠขแ‰ตแ‹ฎ แ‰ดแˆŒแŠฎแˆ แŒ‹แˆญ แ‰ แˆ˜แАแŒ‹แŒˆแˆญ แ‹ญแˆฐแˆซแˆ แ‰ฅแˆˆแ‹‹แˆแข

แŠญแˆแˆŽแ‰ฝ แ‰ แ‹šแˆ… แˆ‚แ‹ฐแ‰ต แ‹จแˆšแ‹ซแŒ‹แŒฅแˆ™ แ‰ฝแŒแˆฎแ‰ฝ แŠฅแŠ•แ‹ณแ‹ญแŠ–แˆฉ แ‰ แ‰‚ แŠฎแˆแ’แ‹ฉแ‰ฐแˆญ แฃ แŠ”แ‰ตแ‹ŽแˆญแŠญแŠ“ แŠ แˆ›แˆซแŒญ แ‹จแˆ€แ‹ญแˆ แŠ แ‰…แˆญแ‰ฆแ‰ต แŠฅแŠ•แ‹ฒแŠ–แˆญ แˆแ‹ฉ แ‰ตแŠฉแˆจแ‰ต แˆฐแŒฅแ‰ฐแ‹ แˆ˜แ‹˜แŒ‹แŒ€แ‰ต แŠฅแŠ•แ‹ณแˆˆแ‰ฃแ‰ธแ‹ แŠ แˆณแˆตแ‰ แ‹‹แˆแข แˆˆแ‰ฐแˆ›แˆชแ‹Žแ‰ฝแˆ แ‰ แ‰‚ แˆฅแˆแŒ แŠ“ แˆ˜แˆตแŒ แ‰ต แŠฅแŠ•แ‹ฐแˆšแŒˆแ‰ฃ แŠ แˆตแŒˆแŠ•แ‹แ‰ แ‹‹แˆแข

แŠจแ‹šแˆ แŒ‹แˆญ แ‰ แ‰ฐแ‹ซแ‹ซแ‹˜ แ‹จแŠญแˆแˆแŠ“ แŠจแ‰ฐแˆ› แˆ˜แˆตแ‰ฐแ‹ณแ‹ตแˆฎแ‰ฝ แ‹ญแˆ…แŠ•แŠ• แŠ แ‹แ‰€แ‹ แŠ แˆตแˆแˆ‹แŒŠแ‹แŠ• แ‹ตแŒ‹แ แŠฅแŠ•แ‹ฒแ‹ซแ‹ฐแˆญแŒ‰ แŒ แ‹ญแ‰€แ‹‹แˆแข

แ‰ แ‰ตแˆแˆ…แˆญแ‰ต แˆšแŠ’แˆตแ‰ดแˆญ แ‹จแ‹ฒแŒ…แ‰ณแˆ แ‰ตแˆแˆ…แˆญแ‰ตแŠ“ แŠ แ‹ญแˆฒแ‰ฒ แˆฅแˆซ แŠ แˆตแˆแƒแˆš แ‹˜แˆ‹แˆˆแˆ แŠ แˆฐแ‹ (แ‹ถ/แˆญ) แค แ‰ฐแˆ›แˆชแ‹Žแ‰ฝ แ‹จแˆšแˆˆแˆ›แˆ˜แ‹ฑแ‰ฃแ‰ธแ‹ แˆžแ‹ดแˆ แˆแ‰ฐแŠ“แ‹Žแ‰ฝ แ‰ แ‰ แ‰‚ แˆแŠ”แ‰ณ แ‹จแ‰ฐแŒ‹แŒ แˆ˜แˆ†แŠ‘แŠ• แŒˆแˆแŒธแ‹‹แˆแข

" แ‰ฐแˆ›แˆชแ‹Žแ‰ฝ แŠ แˆตแ‰€แ‹ตแˆ˜แ‹ แŠฅแŠ•แ‹ฒแˆˆแˆ›แˆ˜แ‹ฑแŠ“ แˆฅแˆแŒ แŠ“ แŠฅแŠ•แ‹ฒแ‹ซแŒˆแŠ™ แˆ›แ‹ตแˆจแŒ แ‹ญแŒˆแ‰ฃแˆ " แ‰ฅแˆˆแ‹‹แˆแข

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โค5๐Ÿ”ฅ1
All of the following are the preconditions that needed for a chemical reaction to occur except___________.
Anonymous Quiz
14%
Collisions between reactants
22%
Proper orientation
15%
Activation energy
49%
Temperature
Sodium and calcium react with water to form hydrogen gas and metal hydroxide. Yet calcium reacts at a moderate, whereas sodium reacts so rapidly. Why do these differences occur? This is due to the difference in:
Anonymous Quiz
13%
Temperature
19%
Surface area of the reactants
58%
Nature of the reactants
10%
Concentration of reactants
โค8
A device that transfers electrical energy from one circuit to another, usually with a change of voltage is known as __________.
Anonymous Quiz
31%
Alternating current (a.c.)
15%
Electrical bell
51%
Transformer
2%
Magnetic relays
Lenz's law is the consequence of conservation of:
Anonymous Quiz
25%
Charge
36%
Momentum
9%
Mass
30%
Energy
โค1
๐Ÿ‘1
I_______________ to that hotel so many times although I always get disappointed with their service.
Anonymous Quiz
17%
like being
12%
was
53%
have been
18%
had been
They had to get together at six in the morning and when we got up at 5:45 a.m, we thought we wouldn't make it. However, we ___________ to get there before they left.
Anonymous Quiz
44%
were able
23%
are able
24%
could be able
9%
must be able
Let me go and check if the car is ready. It _________ when I came this morning.
Anonymous Quiz
19%
intended to be fixed
24%
might be fixed
22%
will have to be fixed
35%
was being fixed
๐Ÿค”1
Two triangles are similar. The sides of one are three times as long as the sides of the other. What is the ratio of the areas of the smaller to the larger?
Anonymous Quiz
37%
1:3
16%
1:6
39%
1:9
9%
1:27
โค3๐Ÿค”1
How many lines of symmetry does a circle have?
Anonymous Quiz
10%
1
14%
2
69%
Infinite number
8%
Can not be known
๐Ÿ‘6๐Ÿค”3
How many lines of symmetry does a regular hexagon have?
Anonymous Quiz
5%
5
82%
6
5%
8
8%
3
๐Ÿ”ฅ5โค2
What is the perimeter of regular hexagon whose radius is 6cm ?
Anonymous Quiz
56%
36 cm
13%
6 cm
19%
36โˆš3 cm
12%
6โˆš3 cm
๐Ÿ‘8โค1
Grade 9 teacher guide Old books.