Calculate the unknown in each of the following diagrams
1. Calculate the unknown in each of the following diagrams
Jawaban:
[tex]d = \sqrt{165} [/tex]
[tex]e = \sqrt{201} [/tex]
Penjelasan dengan langkah-langkah:
Step1:
d=√19²-14²
d=√361-196
d=√165
Step 2:
√(√165)²+6²=e
√165+36=e
√201=e
2. 1. How many grams of NaCl required to prepare each of the following solutions:
Penjelasan:
Sorry sir, where is the question and the answer choices?
3. write the dialog for each of the following situations
Jawaban:
what situation?
Penjelasan:
situasinya apa?
4. Calculate the empirical formulae of the following compound.Please give solution
Stoichiometry
Ar Fe = 56
Ar O = 16
Mass of Fe = 11.2 grams
Mass of O = 16.0 - 11.2 = 4.8 grams
Ratio beween mass and Ar
Fe : O = [11.2/56] : [4.8/16]
Fe : O = 0.2 : 0.3
Fe : O = 2 : 3
Empirical formulae is Fe₂O₃
5. how many grams of NaC1 required to prepare each of the following solutions2500 ppm (w/v) NaC1 250 mL solutions
Penjelasan:
Formula : m NaCl (in Molar) = n ppm × mL
= 2500 ppm = masses of Salt / mL
= masses of Salt (µg) = 2500 ppm × mL
= massea of salt (µg) = 2500 ppm × 250 mL
= masses of salt (µg) = 625 µg or in mg = 625 µg × 10^-4 = 0,0625 grams
6. find the value of each of the following 0.8% of 4.5m
Jawab:
we can use the formula:
percentage/100 x value = result
So, for this case:
0.8/100 x 4,500,000 = 36,000
Therefore, 0.8% of 4.5 million is equal to 36,000.
7. find the value of the unknown in each of the following figures
b). Besarnya sudut segitiga sama kaki 180°
maka,
<a + <b + <c = 180°
68° + 64° + 2b° = 180°
132° + 2b° = 180°
2b = 180° - 132°
2b = 48°
b = 24°
d). <ABC = 180°
maka,
<a + <b + <c = 180°
3d° + 4d° + d° = 180°
8d° = 180°
d = 180° / 8°
d = 22,5°
f).<ABC = 180°
maka,
<a + <b + <c = 180°
f° + f° + f° = 180°
3f° = 180°
f = 180°/3°
f = 60°
8. find the hcf of each of the following 15,60 dan 75
Jawaban:
The prime factorisation of 60 and 75 are :60 = 2 × 2 × 3 × 575 = 3 × 5 × 5So, HCF = 3 × 5 = 15LCM = 2×2×3×5×5 = 300Now, we will calculate HCF by Euclid's Division algorithm.75 = 60 × 1 + 1560 = 15 × 4 + 0Since the last divisor is 15, hence HCF75,60 = 15LCM75,60 = 60 × 75HCF75,60 = 60 × 7515 = 300
9. haloo mohon bantuannya ya yang bisa jawab nanti saya follow for each of the following figures, find the value of the unknown
Jawaban:
(a) 106°
(b) 30°
(c) 11,25°
(d) 11°
Semoga membantu
10. For each following figures,find the total area of shaded regions
Area of shaded egions
= 1/2 area of circle - ( area of triangle + rectangle)
Dari gambar diketahui jari jari = 13,6 cm karena garisnya sampai titik pusat dan diameter = 27,2.
Maka
[tex]a = 3.14 \times 13.6 {}^{2} - ( \frac{1}{2} \times 27.2 \times 13.6\: + 16 \times 11) \\ a = 580.744 - (184.96 + 176) \\ a = 580.744 - 360.96 \\ a = 219.784 \: cm {}^{2} [/tex]
11. prepare suitable dialogue for each of the following picture s
Jawaban:
gambar no 3 kurang jelas
2. Gather with family
Jawaban:
2.A dad says goodbye to his family to work.
3.
Penjelasan:
A kid waves at a old man
12. Calculate the difference (selisih) between the volume of the following!
penyelesaian :
= p × l × t - p × l × t
= 3 × 3 × 6 - 2 × 3 × 2
= 54 - 12
= 42 cm³
Jawaban dan langkah langkah penyelesaian ada di dalam lampiran ya semoga membantu.
Jangan lupa apabila membantu jadikan jawaban tercerdas ya terimakasih ^_^
13. For each of the following figures, find the area of the blue region(s).
c. 45 cm²
d. 150,96 cm²
Penjelasan dengan langkah-langkah:
c. L = L.trapesium - L.segitiga
= 1/2 x (9+17) x 12 - 1/2 x 17 x 6
= 1/2 x 16 x 12 - 51
= 96 - 51
= 45 cm²
d. L = L.jajaran genjang - L.lingkaran
= 12 x 22 - 3,14 x 6 x 6
= 264 - 113,04
= 150,96 cm²
14. Writer dialog for each of the following situation
Jawaban:
mana situation nya....
15. calculate the pH of 0.02 mol dm of H2SO4
jawaban dan cara terlampir difoto
16. calculate the pH of 0,2 M NH4CL solution (kb for NH3 =8 x 10^-5
pH larutan garam tersebut adalah 5,3. NH₄Cl adalah garam yang terhidrolisis sebagian dan bersifat asam. pH larutan garam tersebut ditentukan dengan rumus hidrolisis garam asam.
PembahasanPada soal di atas diketahui beberapa data yaitu
M NH₄Cl = 0,2 M = 2 x 10⁻¹
Kb = 8 x 10⁻⁵
Adapun yang ditanyakan pada soal tersebut adalah pH dari garam yang terhidrolisis tersebut.
Langkah awal yang harus kalian lakukan untuk menentukan pH dari larutan garam tersebut adalah menentukan sifat dari garam termasuk garam asam atau garam basa. Sifat garam dapat ditentuukan dari hasil hidrolisisya. Berikut penentuan sifat garamnya:
NH₄Cl → NH₄⁺ + Cl⁻
NH₄⁺ berasal dari basa lemah (dapat terhidrolisis)
Cl⁻ berasal dari asam kuat (tidak dapat terhidrolisis)
Reaksi hidrolisisnya adalah
NH₄⁺ + H₂O ⇄ NH₄OH + H⁺
Pada reaksi tersebut dihasilkan ion H⁺ sehingga dapat disimpulkan bahwa garam tersebut bersifat asam. Garam tersebut memiliki valensi 1 yang dapat dilihat dari jumlah komponen sisa dari basa lemah (NH₄⁺). Selanjutnya pH garam dapat ditentukan dengan rumus:
[H⁺] = √((Kw/Kb) x M x val)
= √((10⁻¹⁴/ 8 x 10⁻⁵) x 2 x 10⁻¹ x 1)
= √(10⁻¹⁰ x 0,25)
= √(25 x 10⁻¹²)
= 5 x 10⁻⁶
pH = – log [H⁺]
= – log 5 x 10⁻⁶
= 6 – log 5
= 6 – 0,7
= 5,3
Jadi dapat disimpulkan bahwa pH larutan garam tersebut adalah 5,3.
Pelajari lebih lanjut1. jenis dan reaksi hidrolisis: https://brainly.co.id/tugas/96248
2. kemungkinan garam dapat terhidrolisis: https://brainly.co.id/tugas/2004715
3. pengertian hidrolis garam: https://brainly.co.id/tugas/5124974
Detil jawabanKelas: XI
Mapel: Kimia
Bab: Hidrolisis Garam
Kode: 11.7.7
Kata kunci: pH larutan, hidrolisis garam
17. find the value of each of the following:20% of 75
Jawaban:
=75-25%
= -19,25
.
.
.
Semoga Membantu
18. the following(d) -5 + 0-2Bahate the following:(b) 10 + (-3)(d) - 2020Calculate the value of each of the following(b) 0 - 120 - 14(d) 5+ (-8)(e) o--19)(1) -12 +7
Jawaban:
d. -5+0 -2= -7
10+(-3)= 7
19. For each of the following figure, find the value of c
Penjelasan dengan langkah-langkah:
16 c = 180°
c = 180°/16
c = 11,25°
16c° = 180°
c° = 180° ÷ 16
= 11,25°
20. for each of the following sentences, indetify and write the adjective!bantuin pls...
beautifulbigGermanexpensive (a lot of expensive)blackfunnyyounglonginterestingsilly
There you have it.
jawaban:
1.Beautiful
2. Big
2. Big3. German
2. Big3. German4. Expensive
2. Big3. German4. Expensive5. Black
2. Big3. German4. Expensive5. Black6. Funny
2. Big3. German4. Expensive5. Black6. Funny7. Young
2. Big3. German4. Expensive5. Black6. Funny7. Young8. Long
2. Big3. German4. Expensive5. Black6. Funny7. Young8. Long9. Interesting
2. Big3. German4. Expensive5. Black6. Funny7. Young8. Long9. Interesting10. Silly
Penjelasan:
jadikan jawaban tercerdas ya kak
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Reviewed by Romano
on
Mei 18, 2023
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