A cube of copper has a mass of 600kg. copper has a density of 9.3g/cm³. Calculate the length of each side of the cube to the nearest mm.
1. A cube of copper has a mass of 600kg. copper has a density of 9.3g/cm³. Calculate the length of each side of the cube to the nearest mm.
This is how you solve it
volume = 600.000 / 9,3 (we make 600 kg to 600.000 g because the density use gram to)
Volume = 64.516 cm³ (approximately)
Lenght = 254 cm
Lenght = 254,0 mm
2. - good,better,best is specimen of ... verb - can,could,may,might,will,shall, these are kinds of several specimen of - superlative degree of bad worse is
Jawaban:
Good - better - best - is specimen of IRREGULAR verb.
Alasan :
Karena dari bentuk pertama sampai ketiga nya berbeda maka "Good, better and best" masuk ke dalam kategori Irregular verb (kata kerja tidak beraturan)Can - Could - May - Might - Will - Shall - These are kinds of several specimen of AUXILIARY VERBS.
Alasan :
Karena kata-kata tersebut diletakkan di depan kata kerja utama yang digunakan untuk membentuk suatu tenses, maka kata-kata tersebut masuk kedalam kategori Auxiliary verbs (kata kerja bantu)Superlative degree of Bad Worse is WORST
Alasan :
Bentuk perbandingan dari kata sifat "Bad" masuk ke dalam kategori irregular (tidak beraturan). Maka bentuk superlative dari "Bad" adalah "worst = Paling jelek".================================
Mapel : Bahasa Inggris
Materi : Vocabulary Exercises
Kelas : 8
Kode Soal : 8.5
Kode Kategorisasi : 8.5.4
3. A solution of copper (II) sulphate is Electrlyzed
fgbhgvb
hhfgvb
hgffhbnfcgvc
hhjnnjjElektrolisis CuSO₄ Elektroda Pt
Reaksi di Anoda 2H₂O ==> 4H⁺ + 4e + O₂
Reaksi di Katoda Cu²⁺ + 2e ==> Cu
semoga dapat membantu yah kak
untuk pertanyaan atau apapun kakak bisa mengepostkan di kolom komentar
4. How much heat is needed to raise the temperature of a block of copper (weighing 0.5 kg) from 0°C to 100°C? (the specific heat capacity of copper, c = 400 J / kg°C)
Q = m.c.∆t
Q = 0,5 kg . 400 J/kg°C . (100-0)°C
Q = 200 J . 100
Q = 20.000 J
5. 5. (a) A copper ball has a mass of 1 kg. Calculate the radius of the ball, given that the density of copper is 8900 kg m^-3tolong ya kak makasih..
Jawaban:
3 x 10^-2 m
Penjelasan:
Massa = 1 kg
Massa Jenis = 8900 kg/m³
Massa Jenis = Massa / Volume
8900 kg/m³ = 1 kg/Volume
Volume = 1/8900 m³
V = 4/3 πr³
1/8900 = 4/3 x π x r³
r³ = 3/4π x 8900
r = 0,03 m = 3 x 10^-2 m
6. A cylindrical paint can has a diameter 14 cm and a height of 10 cm. Find the capacity of the can in mililitres
diameter = 14 cm
height = 10 cm
the capacity
= 1/4 × phi × diameter^2 × height
= 1/4 × 22/7 × 14 cm × 14 cm × 10 cm
= 1540 cm^3
= 1540 mililitres
so the capacity of the paint can in mililitres is 1540 mililitres
7. Calculate the mass of copper deposited at the cathode when a current of 0.125A flows through an aqueous copper (II) sulphate of concentration 0.80 mol dm-3 for 30 minutes
0,074gram
Penjelasan:
knows :
A = 0,125A
copper (II) sulphate = CuSO4
M = 0,8mol/dm³
t = 30minutes = 30minutes × 60s/minutes = 1800s
Deterimine of mass copper
Answer
CuSO4 => Cu²+ + SO4²-
e = Ar Cu/2
W(weight) = e×A×t/96500
W = 63,5/2 × 0,125 × 1800 / 96500
W = 0,074 gram
8. 50 cm³ of 1.0 mol dm-³ of hydrochloric acid reacts with excess copper(II) oxide to produce copper (II) chloride. Write the chemical equation for the reaction and calculate the mass of copper(II) chloride formed.
The chemical equation for the reaction is:
[tex] 2HCl \ + \ CuO \ \rightarrow \ CuCl_2 \ + \ H_2O [/tex]
Mass of copper(II) chloride formed is 3,3625 g
»EXPLANATION«Hydrochloric Acid reacts with excess copper(II) oxide to form copper(II) chloride and water in abalanced reaction:
[tex] 2HCl \ + \ CuO \ \rightarrow \ CuCl_2 \ + \ H_2O [/tex]
moles of Hydrochloric Acid = 50 cm³ × 1 cm³/1000 dm³ × 1.0 mol/dm³
moles of Hydrochloric Acid = 0,05 mol
mass of [tex] CuCl_2 [/tex] formed = ½ × 0,05 mol × 134,5 g/mol
mass of [tex] CuCl_2 [/tex] formed = 3,3625 g
#GeniuzS05
#SAYIDI
9. If 12.4 g copper(II) carbonate reacts completely with excess H2SO4, calculate the mass of copper(II) sulphate formed.
Jawaban:
Copper (II) Carbonate = CuCO3
m = 12,4 gram
Mr = 123,5
mol = m/Mr = 12,4/123,5 = 0,1 mol
bereaksi smua maka CuCO3 habis
CuCO3 + H2SO4 -> CuSO4 + H2CO3
m 0,1
b 0,1
s 0
b CuSO4 = 1/1 x 0,1 = 0,1 mol
b CuSO4 = s CuSO4 = 0,1 mol
mass = mol x Mr = 0,1 x 159,5 = 15,95 gram
10. Copper is a kind of metal that is ………………………… conducting electricity
Jawaban:
copper is a kind of metal that is calledconducting electricity
५ᵎʚՙsemoga membantu ᵕ̈
-rribka
11. I have a glass. The shape of it is .... a. circle b. triangle c. round d. cylindrical
D. Cylindrical
Semoga bermanfaat, jadikan jawaban terbaik ya. ☺
d. cylindrical
maaf kalau salah
12. 0 c) 75 Fahrenheit = d) 60° Reamur renheit 3. A 50cm long copper rod has an initial temperature of 30°C. The coefficient of expansion of copper is 1.8 105FC. The length of copper at 50°C is ... cm. Plissa tolongg yang tauu jawab yaa
75 Fahrenheit = 24,1°C
60° Reamur = 56,7°C
A 50cm long copper rod has an initial temperature of 30°C. The coefficient of expansion of copper is 1.8*10^-5 FC. The length of copper at 50°C is 50 + (50 x 1.8 x 10^-5 x 50) = 50 + 0,9 = 50,9 cm.
13. 25 gram of alloy composed of copper(Cu) and zinc (Zn) is reacted with HCl, and 4,48 L of hydrogen is obtained at STP. What is the mass presentage of copper in the alloy? catatan : copper tidak beraksi dengan HCl. mohon tuliskan caranya
Zn + 2 HCl => ZnCl2 + H2
V H2 STP = 4,48 liter
V STP = 22,4 liter/mol
mol H2 = 4,48 liter / 22,4 liter/mol = 0,2 mol
mol Zn = mol H2 (koefisien sama) = 0,2 mol
massa Zn = 0,2 mol x 65 gr/mol = 13 gram
massa Cu = 25 - 13 = 12 gram
% Cu = 12 gr/25gr x 100% = 48%
14. A cylindrical solid block of a metal is to be melted to form cubes of edge 20 mm. Suppose the radius and length of the cylindrical block are 100 mm and 490 mm, respectively. Find the number of cubes to be formed. (And the working prosess please)
Jawaban:
641 cubesthe working and the answer are shown in the pic.
15. how many grams of pure copper must be added to 20 grams of an alloy containing 40% copper to produce an alloy containing 60% copper?
20 gr alloy mengandung 40% copper.
Itu berarti jumlah copper = 8 gr
Karena 40/100 x 20 = 8
Untuk membuat alloy nya mengandung 60% copper, itu berarti copper nya harus ditambah 20%, kan? :)
20/100 x 20 = 4 gr
20 % nya kita tambahin dengan 40% yang tadi
8 gr + 4 gr = 12 gr
YEEY, KETEMU
Eh, soalnya gampang ternyata ya?
Semoga jawabannya betul, wkwk.
16. What is NOT an example of a conductor ? * aluminium copper silver pure water
Jawaban:
pure water
bcuz it's non logam
Jangan lupa bintang 5 dan jadikan jawaban terbaik ya >.<
17. One of the element used to produce wire is copper. The chemical code for copper is...
Copper = tembaga = Cu(Cuprum)
18. what is the height of a cylindrical tin with radius 14cm and capacity 4804,8 cm³?
[tex]v = \pi \times r \times r \times h \\ 4804,8 = \frac{22}{7} \times 14 \times 14 \times h \\ 4804,8 =616\times h\\ \frac{4804,8}{616} = h \\ h = 7,8 \: cm[/tex]
19. TOLONG BANTU!! BUTUH JAWABAN SEKARANG!!Mikroskop stereo khusus digunakan untuk pengamatan a. Specimen mikroskopis.b. Specimen besar.c. Jenis specimen.d. Struktur mineral.
Jawaban:
b. Specimen besar.
Penjelasan:
Mikroskop stereo adalah mikroskop yang digunakan untuk observasi dengan perbesaran rendah dari sampel yang berukuran relatif besarsecara tiga dimensi. Mikroskop ini juga disebut mikroskop binokuler. Cahaya yang digunakan biasanya cahaya yang berasal dari pantulan sampel.
#Semogabermanfaatya#
#salamdariUwU
20. If the coofficien linier expansion of copper is 0.00007 dc calculate the amount of space Carea) expansion of copperpake , given , ask ama solving oke
Penjelasan dengan langkah-langkah:
given:
[tex] \alpha = 7 \times {10}^{ - 5} \\ [/tex]
asked:
[tex]dx = ...[/tex]
solving:
[tex]dx = 2\alpha \times dt \times x \\ = 14 \times {10}^{ - 5 } \times dt \times x[/tex]
where dx is the amount of expansion, dt is the difference in temperatures, 2alpha is the area coefficient, and x is the starting length
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