which of these compounds is not an electrolyte? a. sulphuric acid b. copper(II) chloride c. ammonium chloride d. carbon tetrachloride e. potassium hydroxide
1. which of these compounds is not an electrolyte? a. sulphuric acid b. copper(II) chloride c. ammonium chloride d. carbon tetrachloride e. potassium hydroxide
d karena carbon tetrachloride tidak dapat membentuk ionD. Karbon tetraklorida
Senyawa tersebut memiliki ikatan kovalen, bukan ion
2. When the frequency of a wave is increased, what happens to :A.) the wavelength if the speed is constant?B.) The speed of the wave if the Wavelength is constant? Mohon bantuannya, hari ini duenya
Penjelasan:
A. Wavelength = speed/frequency, so if frequency increased wavelength will decereased
B. Speed = wavelength. Frequency, so if frequency increased speed will increased
3. The coefficient of x² in the expansion of (4 + ax)(1 + x/2)⁶ is 3. Find the value of the constant a.
[tex]a = - 4[/tex]
STEP :[tex]( {x + y})^{6} = {x}^{6} + 6 {x}^{5} y + 15 {x}^{4} {y}^{2} + 20 {x}^{3} {y}^{3} + 15 {x}^{2} {y}^{4} + 6 x {y}^{5} + {y}^{6} [/tex]
[tex](4 + ax)( {1 + \frac{x}{2} })^{6} = [/tex]
[tex](4 + ax) ({1}^{6} + 6( {1})^{5}( \frac{x}{2}) + 15( {1})^{4} ( {\frac{x}{2}})^{2} + 20( {1})^{3} ( {\frac{x}{2}})^{3} + 15( {1})^{2} ( {\frac{x}{2}})^{4} +6( {1}) ( {\frac{x}{2}})^{5} + ( {\frac{x}{2}}^{6} ) )[/tex]
[tex] = (4 + ax)(1 + 3x + \frac{15 {x}^{2} }{4} + \frac{ 20{x}^{3} }{8} + \frac{ 15{x}^{4} }{16} + \frac{ 6{x}^{5} }{32} + \frac{ {x}^{6} }{64} )[/tex]
unit that contains x² is :
[tex] = 4( \frac{15 {x}^{2} }{4} ) + ax(3x)[/tex]
[tex]= 15 {x}^{2} + 3a {x}^{2} [/tex]
[tex] = (15 + 3a) {x}^{2} [/tex]
The coefficient of x² is 3, so :
[tex]15 + 3a = 3[/tex]
[tex]3a = 3 - 15[/tex]
[tex]3a = - 12[/tex]
[tex]a = - 4[/tex]
4. Find the value of the constant k for which the line y = 2x + 1 is a tangent to the curve y = x^3 + kx + 3
x³ + kx + 3 = 2x + 1
x³ + (k-2)x + 2 = 0
gunakan deskriminan
karena menyinggung maka D=0
[tex]D= q^{2} + \frac{4p^{3} }{27} \\ 0=2^{2} + \frac{4(k-2)^{3} }{27} \\ -4=\frac{4(k-2)^{3} }{27} \\ -27=(k-2)^{3} \\ \sqrt[3]{-27}=k-2 \\ -3=k-2 \\ k=-1 [/tex]
5. If sulphuric acid and sodium hydroxide solution are mixed, what is the result? Write your answer in the form of word equation
NaOH+H2SO4=>Na2SO4+H2O
setarakan
2NaOH+H2SO4=>Na2SO4+2H2O
6. the engine of airplane is able to move the airplane with a forces 10000 newtons. when the airplane is moving with constant of speed 300m/s , the power delivered by the engine is...
POWER
P = F.V
P = 10000. 300
P = 3.000.000 watt
P = 3 MWatt
The power delivered by the engine is 3 MWatt.
7. The Vander Wali's equation is given as:(P+a/v^² ) (V-b)=RTwhere P is pressure, V is volume, T is temperatureand R is gas constant What are the units of constant
Jawaban:
R = gas constant
R = 8.314 .......
The unit is J * K^-1 * mol ^-1
8. Compound x is made from two elements. one element has the second highest value of first ionisation energy in its group and the other element has the third highest value of first ionisation energy in its group. which compounds could be compound x
Jawaban:
Senyawa X terbentuk dari dua unsur. Unsur pertama memiliki energi ionisasi pertama tertinggi kedua dari golongannya dan unsur kedua memiliki memiliki energi ionisasi pertama tertinggi ketiga dari golongannya. Senyawa apa yang merupakan senyawa X itu?
Ne merupakan unsur pertama dengan eV 21.5646
F merupakan unsur kedua dengan eV 17.42282
Senyawa FNe- Neon fluoride(?)
9. The rate constant for a first-order reaction is 3.64. 10 - 2 seconds -1 at 298 k.. what is the rate constant for the reaction at 350 k if the activation energy of the reaction is 50.2 kj/mol. given: the quantity r = 8.314 j/k.mol.
Jawaban terlampir di foto ya!
#GeniuzS05
#SAYIDI
10. Which compound produces the greatest number of ions when 1 mole is dissolved in water? A aluminium sulfate B ammonium carbonate C ammonium nitrate D calcium nitrate
Jawaban:
D
Penjelasan:
calcium nitrate is pure electrolyte
Jawaban:
B. ammonium carbonate
Penjelasan:
itu canyank,,,,,,,, maap kalau salah,,,,,,,
11. How many atoms of aluminum hydroxide may be formed from 65 grams of sodium hydroxide?
Jawaban:
tidak tau tidak tau tidak tau
12. If x − 2 is a factor ofx2−bx+b, where b is a constant, what is the value of b ?
2-bx+b
(1-x)b+2=0
(1-x)b= -2
b = -2/(1-x)
if x-2=0 ; x=2 --->>>b = -2/(1-2)= 2
13. 20.0 cm³ of hydrochloric acid is needed to neutralize completely 25.0 cm³ of 0.1 mol dm-3 sodium hydroxide solution in the conical flask. Calculate the molarity of the hydrochloric acid.
The molarity of the hydrochloric acid is 0,125 M
»EXPLANATION«In this case, you can use 2 ways to solve it: first, stoichiometrically, by first making a balanced reaction and then using moles to calculate molarity (mol/L); and second, which is simpler. Use the formula below:
Va × Ma × a = Vb × Mb × b
where Va is the volume of the acid, Ma is the molarity of the acid, and a is the valence of the acid; the same goes for bases.
Hydrochloric acid (HCl) and sodium hydroxide (NaOH) each have one valence. So, the calculation:
Va × Ma × a = Vb × Mb × b
20.0 cm³ × Ma × 1 = 25.0 cm³ × 0,1 M
20 cm³ × Ma × 1 = 2,5 mmol
Ma = 0,125 M
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#SAYIDI
14. Help ya 1. A 250 cm3 of solution contains 132 mg of ammonium sulphate, (NH4) 2SO4 If dissociation constant of ammonia is 2.0 x 10¯5 what is the pH of the solution? The molecular mass of (NH4) 2SO4 id 132 /mol) 2 . one litre of sodium acetate solution has a pH of 9.0 Ka for CH3COOH is 10¯5 how many grams of sodium acetate present in solution? The molecular mass of CH3COONa is 82
1) mole of (NH4)2SO4 = 132/132 = 1 mmole
[(NH4)2SO4] = M = 1/250 = 4.10⁻³ M
[H+] = √(Kb. M. valency) = √(2.10⁻⁵×4.10⁻³×2) = 4.10⁻⁴ M
pH = - log 4.10⁻⁴ = 4 - log 4 = 4 - 2 log 2 = 3,4
2) pH=9 —> pOH=5 —> [OH-] = 10⁻⁵ M
[OH-] = √(Ka. M. valency)
10⁻⁵ = √(10⁻⁵×M×1)
10⁻¹⁰ = 10⁻⁵. M
M = 10⁻⁵ M
mole of CH3COONa = V. M = 1×10⁻⁵ mole
Mass of CH3COONa = 10⁻⁵ × 82 = 0,00082 grams
15. the amount of water on Earth remains constant, but is continually moving around the earth.
Jawaban:
because the Earth has an atmosphere, so there are clouds that we see every day and water
16. What is the present value of a constant perpetuity of 25 per year where the required rate of return is 5%
Jawaban:
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ㅕ범솜ㄹㅁㅎ쥬ㅛ
Penjelasan:
ㅓ녀쥿점셔더요범6매뷰볖모뮤
17. 21. What is the result of the burning of the coal and oil? A. Ammonium D. Sulfur dioxide B. Nitric acid E. Airborne ammonia C. Sulphuric acid
Jawaban:
21. What is the result of the burning of the coal and oil? A. Ammonium D. Sulfur dioxide B. Nitric acid E. Airborne ammonia C. Sulphuric acid
Penjelasan:
Jawaban dicetak tebal D. Sulfur Dioxide merupakan hasil yang didapatkan dari proses pembakaran batubara dan bahan bakar kendaraan yang tentunya juga menciptakan polusi udara dan pemanasan global (Global Warming).
Semoga membantu ya.
18. What is the force constant of a spring which is stretcheda) 2 mm by a force of 4N,b) 4cm by a mass of 200g?.
Jawaban:
Untuk menghitung konstanta gaya suatu pegas, kita perlu menggunakan rumus:
k = F / x
Di mana:
k = konstanta gaya (dalam newton/meter)
F = gaya yang diberikan pada pegas (dalam newton)
x = perpanjangan pegas (dalam meter)
a) Dalam hal ini, gaya F = 4 N, dan perpanjangan pegas x = 2 mm = 2 x 10^-3 m. Jadi, konstanta gaya k = F / x = (4 N) / (2 x 10^-3 m) = 2000 N/m.
b) Dalam hal ini, massa m = 200 g = 0.2 kg. Selain itu, kita juga tahu bahwa gaya gravitasi pada bumi adalah F = m x g, di mana g adalah percepatan gravitasi (9.8 m/s^2). Jadi, gaya F = 0.2 kg x 9.8 m/s^2 = 1.96 N. Perpanjangan pegas x = 4 cm = 4 x 10^-2 m. Jadi, konstanta gaya k = F / x = (1.96 N) / (4 x 10^-2 m) = 49 N/m.
Penjelasan:
19. What is the advantage of having a constant body temperature?
Jawaban:
The advantages of having constant body temperature in mammals is: v They can remain active, seek food, and defend themselves in a wide range of outdoor temperatures
Sorry if wrong. Hope it helps
20. find the volume of sodium hydroxide 0.1 M to neutralize 20 ml of sulfate acid 0.2M
Jawab :
Volume natrium hidroksida (NaOH) 0,1 M yang dibutuhkan untuk menetralkan 20 mL asam sulfat (H₂SO₄) 0,2 M adalah 40 mL.
Penyelesaian Soal :
Diketahui : [NaOH] = 0,1 M
[H₂SO₄] = 0,2 M
V H₂SO₄ = 20 mL
Ditanya : V NaOH ?
Jawab :
V₁ × M₁ = V₂ × M₂
20 mL × 0,2 M = V₂ × 0,1 M
V₂ = (20 mL × 0,2 M) / 0,1 M
V₂ = 4/ 0,1 mL
V₂ = 40 mL
∴ Kesimpulan banyaknya volume NaOH adalah 40 mL.
Pembahasan :
Pengertian Molaritas (M)
Konsentrasi merupakan jumlah zat terlarut yang ada terhadap jumlah pelarut tertentu atau terhadap jumlah larutan tertentu. (diasumsikan zat terlarut berwujud cair atau padat, sedangkan pelarutnya berwujud cair) Konsentrasi dapat diungkapkan dengan beragam cara, salah satunya yang paling sering dipakai, dan memang akan kita gunakan sekarang ini adalah Molaritas (M), atau konsentrasi molar. Molaritas adalah jumlah mol terlarut setiap liter larutan. Atau bias diungkapkan dengan rumus:
M = n/V
Keterangan : M = konsentrasi zat
n = mol zat terlarut
V = volume larutan (L)
Pengenceran
Proses pengenceran adalah proses yang dilakukan dengan mencampurkan pelarut yang lebih ukurannya dari suatu zat yang dilarutkannya. engenceran pada prinsipnya hanya menambahkan pelarut saja, sehingga jumlah mol zat terlarut sebelum pengenceran sama dengan jumlah mol zat terlarut sesudah pengenceran. Dengan kata lain jumlah mmol zat terlarut sebelum pengenceran sama dengan jumlah mmol zat terlarut sesudah penegenceran atau jumlah massa zat terlarut sebelum pengenceran sama dengan jumlah massa zat terlarut sesudah pengenceran.
Rumus :
V₁ × M₁ = V₂ × M₂
Keterangan :
M₁ = Molaritas larutan sebelum pelarutan/pengenceran
V₁ = Volume larutan sebelum pelarutan/pengenceran
M₂ = Molaritas larutan sesudah pelarutan/pengenceran
V₂ = Volume Molaritas larutan sesudah pelarutan/pengenceran
Pelajari lebih lanjut :
materi tentang pH asam Basa https://brainly.co.id/tugas/21157455
materi tentang pH asam Basa https://brainly.co.id/tugas/21176838
materi tentang pH asam Basa https://brainly.co.id/tugas/21126249
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Detail jawaban :
Kelas : 11
Mapel : Kimia
Bab : 5
Kode : 11.7.5
Kata Kunci : asam, basa, pH
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