Ionic equation between calcium carbonate and an acid
1. Ionic equation between calcium carbonate and an acid
Jawaban:
CaCO3 + HCl - Calcium Carbonate + Hydrochloric Acid.
Jawaban:
CaCO₃ (s) + 2HCl (aq) ---> CaCl₂ (aq) + H₂O (l) + CO₂ (g)
Discussion
The chemical formula for calcium carbonate is CaCO₃ which is formed from Ca²⁺ ions and CO₃²⁻ ions. Meanwhile, hydrochloric acid solution has the chemical formula HCl.
Correction questions
The correct reaction product is a solution of chloride, water and carbon dioxide gas, according to the following equation:
CaCO₃ (s) + HCl ---> CaCl₂ + H₂O + CO₂ (not yet equal)
Balance the Cl atoms
CaCO₃ (s) + 2HCl (aq) ---> CaCl₂ (aq) + H₂O (l) + CO₂ (g) (already equivalent)
While the reaction that produces sodium sulfate and water is:
2NaOH (aq) + H₂SO₄ (aq) ---> Na₂SO₄ (aq) + 2H₂O (l)
2. A compound contains one atom of calcium, two atoms of hydrogen and two atoms of oxygen. What is the correct chemical formula of the compound?
Jawaban:
Ca(OH)2
maaf kalau salah
3. Sugar and chalk are compounds. What element(s) are common in both of thesecompounds?(A) Carbon only(B) Carbon and calcium(C) Calcium and hydrogen(D) Carbon and oxygen
Jawaban:
a carbon only paham... q
4. a) Name the compound formed when oxygen reacts with magnesium. b) Using these words, write the reactant(s) and product(s) from the reaction.
JAWABAN
a. MgO (Magnesium Oxide)
b. Reactant : Oxygen (O2) and Magnesium (Mg)
Product : Magnsium Oxide (MgO)
PENGERJAAN / PENJELASANGambar rumus reaksinya dulu biar gampang menyetarakan reaksinya (bisi produknya lebi dari satu)
a. magnesium + oxygen -> ?
Mg + O2 -> MgO
2Mg + O2 -> 2MgO (disetarakan)
b. Reaktan itu itu senyawa yang bereaksi, dan product itu hasil dari reaksi jadi reactant = O2 , Mg dan product = Mg
Like, ok? i typed quite long5. Beryllium forms a compound with chlorine that hasthe empirical formula becl2. how would you determinewhether it is an ionic compound?
Answer :
it's ionic compound
Explain:
because group 1A to 3A is metal element (except hydrogen and boron)
apart from group 1A to 3A, is non-metal element (4A, 5A, 6A, 7A, 8A)
beryllium is in 2A group so it's metal element
Chlorine is in 7A group so it's non-metal element
metal + non metal = ionic
6. di bawah ini yang merupakan contoh unsur non logam adalah ? aluminium, aurum dan argentum oxygen, hydrogen dan sulphur calcium, cuprum dan ferrum natrium, plumbum dan stannum
Jawaban:
oxygen,hydrogen
Penjelasan:
karena bukan unsur logam
7. 3. When the metal magnesium burns in oxygen gas, a compound is formed.(a) What is the name of the compound?
Jawaban:
materi stoikiometri
Penjelasan:
2Mg (s) + O2 (g) --> 2MgO (s)
MgO = Magnesium Oksida
8. The explosive known as RDX contains 16.22% carbon, 2.72% hydrogen, 37.84% nitrogen, and 43.22% oxygen by mass. Determine the empirical formula of the compound.
[C] : 16,22% (w/w)
[H] : 2,72% (w/w)
[N] : 37,84% (w/w)
[O] : 43,22% (w/w)
the emperical formula of the compound : .. ?
Answered
Step 1
Deterime mass of each elements in RDX
% (w/w) means X grams solute in 100 grams solvent.
[C] : 16,22% means 16,22 g of C in 100 g
[H] : 2,72% means 2,72 g of H in 100 g
[N] : 37,84% means 37,84 g of N in 100 g
[O] : 43,22% means 43,22 g of O in 100 g
Step 2
Determine moles of each elements
moles : mass / Ar
moles of C : 16,22 g / 12 g/moles
C : 1,352 moles
moles of H : 2,72 g / 1 g/moles
H : 2,72 moles
moles of N : 37,84 g / 14 g/moles
N : 2,703 moles
moles of O : 43,22 g / 16 g/moles
O : 2,701 moles
Step 3
Compare moles of each elements so we are going to find out the empirical formula of the compound.
m : moles
m. of C : m. of H : m. of N : m. O
1,352 : 2,720 : 2,703 : 2,701
——————————————— (1,352)
1 : 2,01 : 2,00 : 2,00
CH2N2O2
(CH2N2O2)n
So, the empirical formula of the compound is (CH2N2O2)n
Wish it helped
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@XeMore
9. What is compound words and write the compound words of Leadership!
Jawaban:
Compound words are a combination of two basic words (morphemes) that ultimately have a new meaning. This tense will easily be found in Indonesian language in addition to compound sentences.
10. What ia compound words and write the compound words of Leadership!
Jawaban & Penjelasan:
Compound words or compositeum is a combination of basic morphemes which are all status as words that have special phonological, grammatical, and semantic patterns according to the rules of the language in question.
11. Water is a chemical compound ... consists of hydrogen and oxygen A.when What C.which D.whose E.where
Jawaban:
c.which
Penjelasan:
karena bahasa Inggris nya yang which
jawaban C :D
soalnya kalau where, when, whose, bakalan aneh dan gk cocok sama soalnya :D
maaf ya kalau kurang jelas penjelasannya hehe
12. What affect the colours of the aurora?A. Gas.B. Electrons and gas.C. Nitrogen and oxygen.D. Oxygen and electrons.E. Electrons, nitrogen, and oxygen.
Jawaban:
E. Electrons, nitrogen, and oxygen
or elektron, nitrogen dan oksigen
Penjelasan:
The reaction between solar wind particles and the Earth's atmosphere, produces a variety of colors in the aurora. At altitudes above 300 km, solar wind particles will collide with hydrogen atoms to form a reddish aurora color. Increasingly, at an altitude of 140 km, solar wind particles react with oxygen atoms that form blue or purple auroras. Meanwhile, at an altitude of 100 km protons and electrons contact with oxygen and nitrogen atoms so that the aurora is visualized in green and pink
or
Reaksi antara partikel angin matahari dengan atmosfer bumi, menghasilkan berbagai macam warna pada aurora. Pada ketinggian di atas 300 km, partikel angin matahari akan bertumbukan dengan atom-atom hidrogen sehingga terbentuk warna aurora kemerah-merahan. Semakin turun, yakni pada ketinggian 140 km, partikel angin matahari bereaksi dengan atom oksigen yang membentuk cahaya aurora berwarna biru atau ungu. Sementara itu, pada ketinggian 100 km proton dan elektron bersinggungan dengan atom oksigen dan nitrogen sehingga aurora tervisualisasikan dengan warna hijau dan merah muda.
13. A Coumpound of nitrogen and oxygen has the formula NO. in this compound there are 1.143 b of oxygen for each 1.00g of nitrogen.A difreng compound of nitrogen and oxygen has the formula NO2. How many grams of oxygen would be combined with each 1.00g of nitrogen in NO2? a. 2.286g O b. 1.000g O c. 0.5715g O d. 4.572g O e. 2.000g O Mohon bantu dengan Caranya ;)
N2+2O2→2NO2
perbandingan mol N2 dan O2 adalah 1:2
1gram N2= 1:28 mol= 0.0357142857 mol,,,
jadi mol O2 = 0.0714285714 mol
jadi massa O2= 0.0714285714 x 32 = 2.2857142848gram
A
14. Air is mixture of different gases. The example of gas are . . . A. Carbohydrate and oxygenB. Carbon dioxide and oxygenC. Oxygen and waterD. Oxygen and light
Jawaban:
b. carbon dioxide and oxygen
15. What are the two products that are formed during the light reaction stage of photosynthesis in higher plants? A. ATP and oxygen B. NADPH and oxygen C. ATP and NADPH D. Oxygen and water E. Sugar and oxygen
C. NADPH and ATP. It's from the light reaction
16. What is compound words and write the compound words of Leadership.
Penjelasan:
Compound words are a combination of two basic words (morphemes) that ultimately have a new meaning. This tense will easily be found in Indonesian language in addition to compound sentences.
17. Combustion analysis of 1.200 g of an unknown compound containing carbon, hydrogen, and oxygen produced 2.086 g of CO2 and 1.134 g of H2O. What is the empirical formula of the compound?
Rumus Empirisnya adalah CH2O.
18. Antara berikut, yang manakah sebatian ion? Which of the following is an ionic compound? A). NaCl B) NH C ) HCI D). CO2
Jawaban:
NaCl karena terdiri dari logam dan non logam
19. exwrcises compound noun, compound adjective,and collocation
Jawaban:
latihan kata benda majemuk, kata sifat majemuk, dan kolokasi
20. A compound of nitrogen and oxygen has the formula NO. In this compund there are 8/7 g of oxygen for each 1 g of nitrogen. A different compound has the formula N2O. How many grams of oxygen would combined with each 1 g of nitrogen in N20? a. 4/7 g b. 1 g c. 8/7 g d. 2/7 g e. 16/7 g
Matter : Stoichiometry
Sub matter : Dalton's Law
Weigh of O = 8/7 gram of N
Ratio mass of NO:
N ÷ O = 7 ÷ 8
Compound N2O:
2×N ÷ O = 7 ÷ 8
2 ÷ O = 7 ÷ 8
O = 16/7
Answer is E.
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