4.16 g unsur W bertindak balas dengan 1.92 g oksigen untuk membentuk oksida

logam W. Formula empirik bagi oksida logam ini ialah W₂O₃. Berapakah jisim atom

relatif W? [Jisim atom relatif : O = 16]

4.16 g of element W reacts with 1.92 g of oxygen to form metal oxide W. The

empirical formula for this metal oxide is W₂O_3. What is the relative atomic mass of

W? [Relative atomic mass : O = 16]

 Rajah menunjukkan formula struktur bagi kafein. Berapakah jisim bagi 0.25 mol kafein?

Diagram shows structural formula of caffeine. What is the mass of 0.25 mol caffein?

[Jisim atom relatif / Relative atomic mass: H = 1; C = 12; O = 16; N = 14]

Rajah menunjukkan langkah-langkah penimbangan dalam penentuan formula empirik oksida bagi logam P.

Tentukan formula empirik oksida bagi logam P. [Jisim atom relatif : O = 16, P = 207]

Diagram shows the weighing steps taken in the determination of empirical formula of the oxide of metal P.

Determine the empirical formula of metal P oxide. [Relative atomic mass : O = 16, P = 207]

Unsur Q dan unsur R mempunyai nombor proton 12 dan 9 masing-masing. Apakah jisim formula relatif bagi sebatian yang terbentuk antara Q dan R? [Jisim atom relatif: Q = 24, R = 19]

Element Q and R have proton numbers of 12 and 9 respectively. What is the relative formula mass of a compound formed between Q and R? [Relative atomic mass: Q = 24, R = 19]

Apabila 11.5 g etanol terbakar dengan lengkap di dalam oksigen berlebihan, gas karbon dioksida dan air dihasilkan. Hitung isipadu gas terbebas pada suhu bilik. [Jisim atom relatif : H=1, C=12, O=16;

Isipadu molar gas pada suhu bilik : 24 dm³ mol^-1]

When 11.5 g of ethanol burns completely in excess oxygen, carbon dioxide gas and water are produced. Calculate the volume of gas released at room temperature.

[ Relative atomic mass : H=1, C=12, O=16; Molar volume of gas at room temperature : 24 dm³ mol^-1]

Rajah menunjukkan peratusan unsur yang terkandung dalam sebatian X. Apakah formula empirik bagi sebatian X?

[Jisim atom relatif: P = 1, R = 16, Q = 31]

Diagram shows the percentage of elements contained. What is the empirical formula of compound X?

[Relative atomic mass: P = 1, R = 16, Q = 31]

Formula empirik bagi sebatian X ialah CH₂O. Apakah formula molekul sebatian X? [Jisim atom relatif: C= 12, H= 1, O = 16; Jisim molar sebatian X = 150 g mol^-1]

The empirical formula of compound X is CH₂O. What is the molecular formula of compound X?

[Relative atomic mass: C= 12, H= 1, O= 16; Molar mass of compound X= 150 g

mol^-1]

Rajah menunjukkan sebahagian daripada Jadual Berkala Unsur. Apakah formula bagi sebatian yang terbentuk antara X dan Y?

Diagram shows a part of the Periodic Table of Elements. What is the formula of the compound formed between X and Y?

Rajah menunjukkan formula ion bagi unsur X dan Y

Antara yang berikut, formula kimia yang manakah menunjukkan sebatian yang terbentuk daripada unsur-unsur tersebut?

Diagram shows the formula ion for element X dan Y

Which of the following chemical formula shows the compound formed from the elements?

Formula kimia yang manakah betul

Which chemical formulae are correct

Antara yang berikut, yang manakah pasangan sebatian dan formula kimianya yang betul?

Which of the following is the correct pair of compounds and its chemical formula?

Persamaan kimia berikut menunjukkan penguraian zink nitrat.

The following chemical equation shows the decomposition of zinc nitrate.

2Zn(NO₃)₂ → 2ZnO + 4NO₂ + O₂

Berapakah jumlah isi padu gas yang terhasil jika 1.89 g garam zink nitrat terurai dengan lengkap. [Jisim atom relatif: Zn = 65, N = 14, O = 16; satu mol sebarang gas menempati 24 dm³ pada keadaan bilik]

What is the total volume of gas produced when 1.89 g zinc nitrate salt decomposes completely? [Relative atomic mass: Zn = 65, N = 14, O = 16; one mole of any gas occupies 24 dm³ at room condition]

Antara yang berikut, pernyataan manakah yang betul bagi 1 mol bahan?

Which of the following statements is correct about 1 mol of substance?

Rajah menunjukkan susunan radas untuk menentukan formula empirik bagi magnesium oksida.

Antara yang berikut, langkah manakah yang betul untuk memastikan pita magnesium itu terbakar dengan lengkap?

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

Antara persamaan kimia berikut, yang manakah diseimbangkan dengan betul?

Which of the following chemical equations is balanced correctly?

Kira bilangan mol ion karbonat yang terdapat dalam 17.4 g ferum (II) karbonat. [Jisim atom relatif: C= 12, O= 16, Fe= 56]

Calculate the number of mole for carbonate ion in 17.4 g of iron(II) carbonate? [Relative atomic mass of C = 12, O = 16, Fe = 56]

Rajah menunjukkan susunan radas untuk menentukan formula empirik bagi oksida kuprum.

Ali mendapati formula empirik yang dihitungnya kurang tepat dengan menggunakan kaedah di atas. Apakah puncanya yang mungkin?

Diagram shows the apparatus sot up to determine the empirical formula of oxide of copper.

Ali found the calculated empirical formula was not accurate by using above method. What is the possible reason?

2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂

Persamaan kimia diatas menunjukkan penguraian plumbum (II) nitrat

Berapakah jisim plumbum (II) nitrat yang diperlukan untuk menghasilkan 3.6 dm³ gas oksigen pada keadaan bilik?

[JAR : N=14, O=16, Pb=207; isipadu molar gas = 24 dm³ mol^-1 pada keadaan bilik]

The chemical equation shows the decomposition of lead(II) nitrate. What mass of lead (II) nitrate is required to produce 3.6 dm³ of oxygen gas at room conditions?

[Relative atomic mass: N = 14, O = 16, Pb = 207; molar volume of gas = 24 dm³ mol⁻¹ at room conditions]

Jadual menunjukkan empat biji belon yang mengandungi empat jenis gas yang berbeza.

Belon yang manakah mempunyai bilangan atom yang paling banyak?

Table shows four balloons containing four different types of gases. Which balloon has the most number of atoms?