If chemical reaction is endothermic, the temperature would …
1. If chemical reaction is endothermic, the temperature would …
Jawaban:cold
Penjelasan:
2. ammonia sulfate is the product from the reaction between ammonia and sulfuric acid.write down the chemical formula of substances involed in the reaction
[STOICHIOMETRY | X SHS]
Ammonium sulfate : (NH₄)₂SO₄
Ammonia : NH₃
Sulfuric acid : H₂SO₄
Reaction :
2NH₃ + H₂SO₄ --> (NH₄)₂SO₄ (balanced)
3. Caution keep hands away the chemical reaction is in progress 1. The text means that getting too close to material is... a. Able to cause injury b. Harmful to the reaction c. Dangerous to the chemical d. Harmless to the progress
c. dangerous to the chemical
4. task 1 now, read the task carefully what do you think about the place described below?
Jawaban:
My opinion about the place described in the text above is that place is such an amazing one. I would like to visit it and experience the jungle by myself. It would be a great experience watching the nature and everything that lives in it.Penjelasan:
maaf kalau salah5. (a) Place the metals calcium, potassium and zinc in order of chemical reactivity towards water, from the most reactive to the least reactive. (b) Write the chemical equation for the reaction between the most reactive metal in (a) and water.
Hope this will help....hmm.... Chem sec 4 right ?
6. chemical reaction that happen in burning?
Reaksi pemutusan ikatan kimia
7. tolong bantuannya yaa :)) In a closed 1 dm^3 container, 5 mol of hydrogen react with.4 mol of iodide. At chemical equilibrium, there are 4 mol of hydrogen iodide present in the reactant. a. sketch a graph of reaction rate against time to show chemical equilibrium b. sketch a graph of concentration of the reactant and product showing when chemical equilibrium is established
ini soal kimia kok kayak ginek ini si saol bahasa Inggris
8. what is a mother like as described by the sender?
Jawaban:
Hah I don't understand the old questionjya
9. 2. A reaction between 70.0 g of copper(II) oxide and 50 mL of 2.0 M nitric acid produces copper(II) nitrate, Cu(NO3)2 and water. (a) Write the balanced chemical equation for the above reaction. (b) Determine the limiting reactant. (c) Calculate the mass of excess reactant after the reaction. (66.02 g) (d) Determine the percentage yield if the actual mass of copper(II) nitrate obtained from the reaction is 8.5 g (90.62%)
Jawaban:
a. The balanced chemical equation for the reaction above
CuO + 2[tex]HNO_{3}[/tex] → [tex]Cu(NO_{3})_{2}[/tex] + [tex]H_{2}O[/tex]
b. he limiting reactant: nitric acid ([tex]HNO_{3}[/tex])
c. the mass of excess reactant after the reaction = 67,97 g
d. the percentage yield if the actual mass of copper(II) nitrate obtained from the reaction is 8.5 g = 50,47%
Penjelasan:
Persamaan reaksi dari reaksi tersebut adalah:
CuO + 2[tex]HNO_{3}[/tex] → [tex]Cu(NO_{3})_{2}[/tex] + [tex]H_{2}O[/tex]
mol CuO = [tex]\frac{massa}{Mr}[/tex]
= [tex]\frac{70}{79,5}[/tex]
= 0,88 mol
mol [tex]HNO_{3}[/tex] = V x M
= 50 mL x 2 M
= 100 mmol = 0,1 mol
Pereaksi pembatas dapat ditentukan dengan membagi mol reaktan dengan keofisienya. Reaktan yang hasil baginya lebih kecil merupakan pereaksi pembatas.
[tex]\frac{mol CuO}{koef CuO}[/tex] = [tex]\frac{0,88}{1}[/tex] = 0,88
[tex]\frac{mol HNO_{3} }{koef HNO_{3} }[/tex] = [tex]\frac{0,1}{2}[/tex] = 0,05
Hasil bagi yang lebih kecil adalah [tex]HNO_{3}[/tex] jadi pereaksi pembatasnya adalah [tex]HNO_{3}[/tex]. Sehingga:
mol CuO yang bereaksi = [tex]\frac{koef CuO}{Koef HNO_{3} }[/tex] x mol [tex]HNO_{3}[/tex]
= [tex]\frac{1}{2}[/tex] x 0,05
= 0,025 mol
mol [tex]Cu(NO_{3})_{2}[/tex] hasil reaksi = [tex]\frac{koef Cu(NO_{3})_{2} }{Koef HNO_{3} }[/tex] x mol [tex]HNO_{3}[/tex]
= [tex]\frac{1}{2}[/tex] x 0,05
= 0,025 mol
mol [tex]H_{2}O[/tex] hasil reaksi = [tex]\frac{koef H_{2}O }{Koef HNO_{3} }[/tex] x mol [tex]HNO_{3}[/tex]
= [tex]\frac{1}{2}[/tex] x 0,05
= 0,025 mol
CuO + 2[tex]HNO_{3}[/tex] → [tex]Cu(NO_{3})_{2}[/tex] + [tex]H_{2}O[/tex]
Awal : 0,88 mol 0,05 mol
Reaksi : 0,025 mol 0,05 mol 0,025 mol 0,025 mol
--------------------------------------------------------------------------------------------
Akhir : 0,855 mol - 0,025 mol 0,025 mol
Reaktan yang bersisa diakhir reaksi adalah CuO sebanyak 0,855 mol. Massa CuO = mol x Mr
= 0,855 x 79,5
= 67,97 g
[tex]Cu(NO_{3})_{2}[/tex] yang dihasilkan adalah 0,025 mol.
Massa [tex]Cu(NO_{3})_{2}[/tex] = mol x Mr
= 0,025 x 171,5
= 4,29 g
%[tex]Cu(NO_{3})_{2}[/tex] = [tex]\frac{4,29}{8,5}[/tex] x 100%
= 50,47%
Materi tentang pereaksi pembatas dapat disimak pada link:
https://brainly.co.id/tugas/40947892
#BelajarBersamaBrainly
10. Write a sentence by using words: formed, chemical reaction, earthquake, explosion, and expand!
Jawaban:
Fog is formed when warm moist air moves over a cold surface.
The arrow in a chemical equation represents the process of the chemical reaction.
The Government has already identified areas that are vulnerable to earthquake based on seismic activity.
Self-sealing crashworthy fuel tanks have explosion suppression and non-return valves.
He continued to expand the estate, and built Abbotsford House in a series of extensions.
Penjelasan:
Maaf kalo kurang memuaskan
11. 2. The equilibrium constant Kp for the reaction2SO3 +2SO2(g) + O2(g)is 1.8 x 10-5 at 350°C. What is Kc for this reaction?
Jawaban:
Jawaban terlampir di foto ya!
#GeniuzS05
#SAYIDI
12. 3) 0.1 mol of lithium reacts with excess oxygen gas. (a) Write a balanced chemical equation for the reaction. (b) Calculate the mass of the product formed.
Jawaban:
Penjelasan:
(a) A balanced chemical equation for the reaction is:
2Li + O2 -> 2Li2O
(b) To calculate the mass of the product formed, we can use the molecular weight of lithium oxide (Li2O). The molecular weight of Li2O is 30.8 g/mol. Therefore, the mass of 0.1 mol Li2O is 3.08 grams.
13. Find the equilibrium concentration of CO in the reactionco (g) + Clz (g)COCI2 (g)Kc=1.2 × 10^3 at 395°C
Jawaban:
semoga membantu,
Penjelasan:
awalnya,
samakan reaksinyalalu setelah koefisien disamakan, maka misalkan jika koefisien 1 disimbolkan x maka yang lain akan menyesuaikanlalu masukkan rumus nya14. F. TEXT STRUCTURE Task.1 Answer the questions below about the text 1.who is being described in the text? 2.what points are used by the writer to describe the person? a. b. c. 3.what is the writer's opinion about the person being described?
Jawaban:
F. STRUKTUR TEKS
Taks 1
Jawab pertanyaan di bawah tentang teks ini
1.siapa yang digambarkan dalam teks?
2.poin apa yang digunakan oleh penulis untuk menggambarkan orang itu?
3.apa pendapat penulis tentang orang yang dijelaskan?
15. Fill in the blanks by choosing available words in box below!1.is the center of solar system2. The nearest planet from the sun is3. The furthest planet from the sun is4. The biggest planet is the solar system is5. The smallest planet in the solar system isTOLONG DONG KAk
Jawaban:1. Mars is the center of solar
system
2. The nearest planet from the sun is Mercury
3. The furthest planet from the sun is Neptune
4. The biggest planet in the solar system is Jupiter
5. The smallest planet in the solar system is Mercury
6. Moon is the closest planet of the earth
7. Star is a sky object that has it's own light
8. Planet Earth orbits around the sun for 364 days.Penjelasan: Semoga Membantu
16. Who is described by the writer
Jawaban:
siapa yang dideskripsikan oleh penulis
Penjelasan:
sopo
17. caution keep hands away chemical reaction is in pogress . what does the sign mean ?
Hati-Hati, Hindari Tanganmu Ketika Reaksi Kimia Sedang Berlangsung.
18. 1. Which one creates jellyfish's light? A. White blood B. Nervous systemC. Chemical reaction D. Salt water
Jawaban:
D. Salt water
Penjelasan:
Semoga membantu
19. Write a balanced chemical equation describing the reaction of zinc and hydrochloric acid !
Answer :Reaction Metal Metal =Zn(s) Hydrochloric acid solution =HCl(aq) Zinc Chloride =ZnCl2(aq) Hydrogen Gas =H2 (g) Zn(s)+HCl (aq) -->ZnCl2(aq)+H2 (g) EquateZn(s) +2HCl(aq)-->ZnCL2 (aq) +H2 (g)
20. The season described by the picture is ........
Jawaban:
Auntumn
Penjelasan:
maaf kalau salah
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