Which compound has the correct formula?

Sebatian manakah yang mempunyai formula yang betul?

Diagram above shows the percentage by mass of elements in the allicin, which is a compound that causes

the smell in garlic. What is the empirical formula of allicin?

[Relative atomic mass : H = 1, C = 12, 0 = 16, S = 32]

Rajah di atas menunjukkan peratusan mengikut jisim bagi unsur dalam alisin iaitu sebatian yang menyebabkan bau

pada bawang putih. Apakah formula empirik bagi alisin?

[Jisim atom relatif: H = 1, C = 12, O = 16. S = 32]

Diagram above shows the composition ofa coral reef. What is the empirical formula of the compound in the coral reef?

[Relative atomic mass : X = 40; Y=12; Z =16]

Rajah di atas menunjukkan komposisi suatu terumbu karang. Apakah formula empirik bagi sebatian dalam terumbu karang?[Jisim atom relatit X=40; Y =12; Z =16]

Diagram above shows the apparatus set-up to determine the empirical formula of magnesium oxide. Which step is correct to ensure the magnesium ribbon burnt completely?

Rajah di atas menunjukkan susunan radas untuk menentukan formula empirik magnesium oksida. Langkah manakah yang betul untuk memastikan pita magnesium itu terbakar dengan lengkap?

Diagram above shows the set up of the apparatus to determine the empirical formula of a metal oxide. Which of the following metal oxide is suitable to be used in diagram above?

Rajah di atas menunjukkan susunan radas untuk menentukan formula empiric suatu oksida logam. Antara oksida logam berikut, yang manakah sesuai digunakan dalam rajah di atas?

Diagram above shows the apparatus set-up to determine the empirical formula of copper(II) oxide. The dry hydrogen gas must be flowed through the apparatus for several minutes before heating the copper(II).

oxide. What is the reason for this action to be taken?

Rajah di atas menunjukkan susunan radas bagi menentukan formula empirik bagi kuprum(II) oksida. Gas hidrogen kering mesti dialirkan melalui radas untuk beberapa minit sebelum pemanasan kuprum(II) oksida.

Apakah sebab tindakan ini diambil?

Which compound has the empirical formula of CH₂0?

Sebatian manakah yang mempunyai formula empirik CH₂0?

5 g of element X reacted with 8 g of element Y to form a compound with the formula XY₂.

What is the relative atomic mass of element X? [Relative atomic mass of Y=80]

5 g unsur X bertindak balas dengan 8 g unsur Y untuk membentuk sebatian yang mempunyai formula XY₂.

Berapakah jisim atom relatif unsur X? [Jisim atom relatif Y=80]

A compound of magnesium nitrite contains 72 % of magnesium and 28 % of nitrogen.

What is the empirical formula of magnesium nitrite? [Relative atomic mass: N = 14; Mg= 24]

Suatu sebatian magnesium nitrit mengandungi 72% magnesium dan 28% nitrogen.

Apakah formula empirik bagi magnesium nitrit? [Jisim atom relatif. N = 14; Mg= 24]

Stainless steel used to make surgical scalpels contains 71.5% iron, 18.0 % chromium, 8.0 % nickel, and 2.5 % other elements. If the mass of surgical scalpels is 60.0 g, what is the mass of iron in it?

Keluli nirkarat yang digunakan untuk membuat pisau pembedahan mengandungi 71.5% ferum, 18.0 % kromium,

8. 0 % nikel, and 2. 5 % unsur unsur lain. Jika jisim suatu pisau pembedahan ialah 60. 0 g, berapakah jisim ferum

di dalamnya?

0.40 g X metal reacts with fluorine to produce 0. 78 g of X fluoride. What is the empirical formula of the X fluoride? [Relative atomic mass: F = 19; X = 40]

0.40 g logam X bertindak balas dengan f/uorin untuk menghasilkan 0. 78 g X fluorida.Apakah formula empirik bagi X fluorida itu?[Jisim atom reletit: F = 19; X = 40]

The formula for a sulphate ion is SO₄²⁻ and for a nitrate is NO₃⁻. If the formula of the sulphate salts of M is MS0₄, what is the formula of the nitrate salt of M?

Formula bagi ion sulfat adalah SO₄²⁻ dan ion nitrat adalah NO₃⁻. Jlka formula garam sulfat bagi M ialah MS0₄,

apakah formula garam nitrat bagi M?

The reaction between aluminium and iron(III) oxide produce iron and substances X. What is the chemical formula of X?

Tindak balas di antara aluminium dengan ferum(III) oksida menghasilkan ferum dan bahan X.Apakah formula kimia bagi X?

What is the percentage of composition by mass of carbon atoms per molecule in octane, C₈H₁₈?

Apakah peratus komposisi mengikut jisim bagi atom karbon per molekul dalam oktana,C₈H₁₈?

[Relative atomic mass /Jisim atom relatif: H = 1, C = 12]

What is the percentage composition by mass of water in hydrated iron(II) sulphate, FeS0₄.7H₂0?

[Relative atomic mass: H = 1,0= 16, S = 32, Fe = 56]

Berapakah peratus komposisi jisim bagi air dalam ferum(II) sulfat terhidrat, FeS0₄. 7H₂0?

[Jisim atom relatif: H = 1,0= 16, S = 32, Fe= 56]

Ammonium sulphate is used as a fertilizer. What is the percentage by mass of nitrogen in ammonium

sulphate? [Relative atomic mass: H =1; N =14; 0 = 16; S = 32]

Ammonium sulfat digunakan sebagai baja. Berapakah peratusan nitrogen mengikut jisim dalam ammonium

sulfat. [Jisim atom relatif: H = 1; N = 14; 0 = 16; S = 32]