4. Find the solution of x² + 8x +16 0!
1. 4. Find the solution of x² + 8x +16 0!
Jawab:
x² + 8x +16 = 0
(x + 4)^2 = 0
x = - 4
2. What is the solution of 9log2+4log2-18log2=
[tex]
9 \: log \: 2 + 4 \: log \: 2 - 18 \: log \: 2 \\ \\ = (9 + 4 - 18) \: log \: 2 \\ \\ = - 5 \: log \: 2[/tex]
3. What is the solution of 2³×3⁴÷6²
Jawaban:
the solution of your problem
Penyelesaian dari 2³ x 3⁴ : 6² adalah 18.
PembahasanPada bentuk perpangkatan, apabila dalam operasi perkalian dan pembagian terdapat bilangan pokok yang berbeda, maka harus dihitung dahulu masing-masing. Dalam arti, dahulukan perpangkatan, baru selesaikan operasi lainnya.
Dalam hal ini perlu diingat singkatan PaKBaTaK, yaitu pangkat, kali, bagi, tambah, kurang. Artinya perpangkatan didahulukan, diikuti perkalian dan pembagian, selanjutnya penjumlahan dan pengurangan.
Apabila dalam suatu operasi tanpatandakurungmelibatkan perkalian dan pembagian, hitung dari sebelah kiri lalu ke kanan. Begitupun untuk suatu operasi yang melibatkan penjumlahan dan pengurangan.
Lain halnya apabila terdapat tandakurung. Maka operasi di dalam tanda kurung didahulukan.
↓↓↓
Penyelesaian:
2³ x 3⁴ : 6² = 8 x 81 : 36
= 648 : 36
= 18
Jadihasildarioperasiperpangkatantersebut adalah18.
_______________________
Detail JawabanMapel:Matematika
Kelas:X
Materi:Bab 1.1 - Bentuk Akar, Eksponen, Logaritma
KataKunci:Pangkat, Bilangan Pokok, Eksponen
KodeSoal:2
KodeKategorisasi:10.2.1.1
4. A solution of H2SO4 with a molal concentration of 8.010 m has adensity of 1.354g/mL. What is the molar concentration of thissolution?
Answer with explanation:
You are given a solution of sulphuric acid with a molal concentration of 8.010 m and its density is 1.354 g/mL.
And we also know that the molar mass of sulphuric acid which is 98.079 g/mol.
◈ ◈ ◈
With the known datas, we work out the molar concentration in mol/L.
◈ ◈ ◈
The relation between molarity, molality and density is described within the following equation.
[tex]\frac{1}{m} = \frac{d}{M}-\frac{Mr}{1000}[/tex]
Where,
Density (d) = 1.354 g/mL
Molecular mass of solute (Mr) = 98.079 g/mol
Molality (m) = 8.010 m
Molarity (M) = ... mol/L
◈ ◈ ◈
So then,
[tex]\frac{1}{8.010\ m} = \frac{1.354\ g/mL}{M}-\frac{98.079\ g/mol}{1000}[/tex]
[tex]0.1248\ m = \frac{1.354\ g/mL}{M}-0.098079\ g/mol[/tex]
[tex]\frac{1.354\ g/mL}{M} = 0.098079\ g/mol+ 0.1248\ m[/tex]
[tex]\frac{1.354\ g/mL}{M} = 0.222879\ g/mmol[/tex]
[tex]M = \frac{1.354\ g/mL}{0.222879\ g/mmol}[/tex]
[tex]M = 6.075\ mol/L[/tex]
◈ ◈ ◈
Therefore, the molar concentration of said acid solution is 6.075 mol/L.
◈ ◈ ◈
~I hope this helps you~
5. What is the pH of a 3 x 10-7 M solution of HCl ? What concentration of Hydrogen ions is provided by the ionization of water ?
maaf saya tidak mengerti
6. If 149.5 g of potassium chloride is dissolved in water to make 500 ml solution, what is the molarity and in g/dm3 of the solution?
Jawaban:
[tex]=\frac{149.5}{74.55}x\frac{1000}{500} \\=4.01 molar[/tex]
Penjelasan:
7. A solution is made by dissolving 25 g of glucose, C₆H₁₂O₆, to make 500 cm³ solution. What is the concentration of the solution in g/dm
Jawaban:
Calculating concentrations
The concentration of a solution can be shown in g/dm3 or mol/dm3. It is often more useful to know the concentration of a reactant in mol/dm3 so that the amount of reactant in a given volume can be calculated.
8. What is the molarity of H2SO4 solution which contains 49.04 g in 1 litre solution.
Materi : Asam - Basa
Answer:
0.500408163236 (0.5 molarity)
Explanation:
to calculate the molarity of sulfuric acid H2SO4.
KNOWN;
m H2SO4 = 49.04 g
v = 1 litre
Mr H2SO4 =
Mr H2SO4
= (2 × Ar h) + (1 × Ar S) + (4 x Ar o)
= (2×1) + (1×32) + (4×16)
= 2+32+6
Mr H2SO4 = 98
(1.The formula for calculating the moles of sulfuric acid
n = m/Mr H2SO4
n = 49.04/98
= 0.50040816326 or 0.5
(2.The formula for calculating the molarity of sulfuric acid
M = n/v
M = 0.50040816336/1
= 0.5
→so the molarity of sulfuric acid H2SO4 is 0.5
hope it helps, thank you
9. what is purpose of problem-solution
In composition, using a problem-solution format is a method for analyzing and writing about a topic by identifying a problem and proposing one or more solutions. A problem-solution essay is a type of argument.
or
to provide a solution to a problem
10. What is the pH of 2×10^-5 M sulphuric acid solution
Jawaban
pH = 4
Pembahasan
Asam kuat
sulphuric acid solution = larutan asam sulfat
larutan asam sulfat = H₂SO₄
H₂SO₄ ---> 2H⁺ + SO₄²⁻
a = 2
[H⁺] = a Ma
[H⁺] = 2 x 2. 10⁻⁵
[H⁺] = 10⁻⁴ M
pH = - log [H⁺]
pH = - log 10⁻⁴
pH = 4
Pelajari lebih lanjut
pH asam kuat dan asam lemah https://brainly.co.id/tugas/732986, https://brainly.co.id/tugas/20903903, https://brainly.co.id/tugas/14852003, https://brainly.co.id/tugas/21082223, https://brainly.co.id/tugas/4965021# pH larutan asam kuat dan basa kuat https://brainly.co.id/tugas/5710167, https://brainly.co.id/tugas/2626244, https://brainly.co.id/tugas/1519985011. school motorcycleparkingonlywhat is the kind of the text above?
Jawaban:
Traffic Safety........
12. what is the solution of pollution problem?pls help me
Jawaban:
reduce the use of motorized vehicles,no smoking,and use public transportation
The solution to polution problems is to reduce the use of vehicles, by using public transportations insteadPlant more tress with the saying “cut one tree. Plant ten trees” Trees take long time to grow, so we should plant more than how much we chop down
13. task 16 1.what is the letterhead of the letter? 2.who is the letter sent to? 3.what expression used in the solution?
Penjelasan:
semoga membantu.
maaf kalo salah
14. If, 18x = 36So, what is the solution of x²?
Jawab:
2
Penjelasan dengan langkah-langkah:
18x = 36
x=36/18
x=2
Answer :
[tex]18x = 36[/tex]
[tex]x = \frac{36}{18} [/tex]
[tex]x = 2[/tex]
So that,
[tex] {x}^{2} = {2}^{2} = 4[/tex]
15. 1. what what is the topic of the dialogue2. what what is the problem that found in the dialogue3. what m i g h t be the solution of the problem..
1. Ria can't open the documents.
2. Ria's can't open the documents and her laptop still working very slowly.
3. For the first problem Bobby give suggestions to press the 'escape' button first and wait for a while. If it doesn't work, you must press the 'control', 'alt', and 'delete' together to close the applications. For the second problem Bobby give suggestion to re-install the software (maybe).
semoga membantu: )
16. what is the solution to the contraversy internet?
The solution is....
From yourself ! and become a Possitive users. i think that problem is how user use the internet
17. 1) The solution of x/2 is...2) The solution of 5x = 2x + 3 is...3) The solution of 4x - 5 = 6x - 1 is...4) The smallest member of the solution set of 3x - 7 ≥ 8 is...5) 4x ≤ 5x + 6 equivalent is...
Jawaban:
2.) 5x = 2x + 3
5x-2x = 3
3x = 3
x= 3
jadi solusi x adalah 3
-----------------------------
3.)
4x-5 = 6x - 1
4x - 6x = 5 - 1
-2x = 4
x = 4: -2
x = -2
---------------------------
4.)
3x - 7 ≥ 8
3x ≥ 8 + 7
3x ≥ 15
x ≥ 15:3
x ≥ 3
Anggota himpunan x adalah {1,2,3}. Jadi anggota terkecil adalah 1 (ITU BILA DIKETAHUI BILANGAN X ADALAH BILANGAN ASLI, KALAU BILANGAN YANG LAIN BISA BERBEDA.)
5.)Mencari persamaan atau kesetaraan dari 4x ≤ 5x + 6
4x ≤ 5x + 6
4x - 5x ≤ 6
-x ≤ 6
Jadi persamaannya juga bisa x ≤ -6
Penjelasan:
1). Mohon maaf saya belum bisa jawab karna saya masih bingung sama soalnya. (Mungkin ada yang kurang?)
2.) Jadi itu suruh mencari solusi alias kita mencari nilai x yaitu dengan mengelompokan bilangan dengan pasangannya terlebih dahulu. (Seperti bilangan ber-Variabel dengan ber-Variabel, dan sebaliknya)
3.)Jadi itu suruh mencari solusi alias kita mencari nilai x yaitu dengan mengelompokan bilangan dengan pasangannya terlebih dahulu. (Seperti bilangan ber-Variabel dengan ber-Variabel, dan sebaliknya)
4.) Jadi kita mencari anggota bilangan yang terkecil dari himpunan x yaitu 1. Ingat ya itu klo diketahui himpunan x adalah bilangan x
5.) Jadi itu tuh suruh mencari kesetaraan atau persamaan. yaitu kita ketahui hasilnya -x ≤ 6. Nah itu bisa disamakan dengan x ≤ 6
Sekian terimakasih, mohon maaf ya klo ada yang keliru.
Semoga membantu! =D.
18. Water is added to 25.0 ml of a 0.866 m kno3 solution until the volume of the solution is exactly 500 ml. what is the concentration of the fi nal solution?
Jawaban:
Penjelasan:
[tex]M_{KNO_{3}}= 0,866 \ M = \frac{n}{V_{i}} \\\\V_{f}= 500 \ mL\\\\\delta V=25 \ mL\\\\V_{i}=V_{f}-\delta V\\\\V_{i}=500 \ mL-25 \ mL = 475 \ mL\\\\M_{f \ KNO_{3}}=M_{KNO_{3}}\times \frac{V_{i}}{V_{f}} =\\\\M_{f \ KNO_{3}}=0,866 \ M \times \frac{475 \ mL}{500 \ mL} =\\\\M_{f \ KNO_{3}}=0,866 \ M \times \frac{475 \ mL}{500 \ mL} = 0,8227 \ M[/tex]
19. what is the colour of the women only buses?terjemahannya dan jawabannya
Jawaban:
apa warna bus khusus wanita?
Penjelasan:
warna bus wanita contoh: pink
jawaban terbaik?
jawaban : pink
translate : apa warna bus khusus wanita?
20. What is the molarity of a solution containing 4 moles of KCl in 2.5 L of solution?
Penjelasan:
dik : n KCl = 4 mol
v = 2,5 L
dit : M = ?
jb :
M = n / v
= 4 mol / 2,5 L
= 1,6 mol/L
semoga membantu :)
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