determine the number of molecules in 25g of methane
1. determine the number of molecules in 25g of methane
Jawaban:
1,5625 mol atau 1.5625 moles
Penjelasan:
rumus : [tex]mol = \frac{gram}{Mr}[/tex]cari Mr atau massa molekul relatif nya dulu.ketahui bahwa methane atau metana itu rumus kimianya [tex]CH_4[/tex] jadi terdiri dari 1 atom C (carbon) dan 4 atom H (hydrogen).
Mr didapat dari penjumlahan Ar (massa atom relatif)
Ar C itu 12, sedangkan Ar H itu 1
Mr = Ar C + 4 × Ar H
Mr = 12 + 4 × 1 = 16
jalankan sesuai rumusmol = 25 g ÷ 16 = 1,5625
jadi, jumlah molekul pada 25 gram metana adalah 1,5625.
xowlx
2. Determine the number of terms -7,-1,5,11,...,89
[tex] \sf\underline { Barisan \: Bilangan } [/tex]
-7, -1, 5, 11, ..., 89
U1 = -7
b = 6
Determine the number of terms => Tentukan banyak suku.
n = ...
[tex] \\ [/tex]
Un = U1 + (n - 1)b
89 = -7 + (n - 1)6
89 = -7 + 6n - 6
6n = 89 + 7 + 6
6n = 102
n = 102 ÷ 6
n = 17
[tex] \\ [/tex]
[tex] \boxed { themarblerace } [/tex]
3. Determine the number of terms -7,-1,5,11,...,89
Jawab:
Number of terms = 17.
Penjelasan dengan langkah-langkah:
a=-7; Un=89
d=-1-(-7) =-1+7=6; d=5-(-1)=5+1=6
d=11-5=6; Jadi d konstan =6.
Yang dicari adalah n :
Un= a1+(n-1). d
89= -7+(n-1) x6
89+7=6x(n-1) --> 96=6xn-6x1
96=6n-6
96+6=6n
6n=102 --> n=17.
4. Determine the value of x that satisfies the value of the square number below 24x+14 = 64x+2.....
Answer:
24x+14 = 64x+2
24x+14 = (26)x+2
24x+14 = 26x+12
4x + 14 = 6x + 12
14 – 12 = 6x – 4x
2x = 2
X = 1
~one more goes to the experts :)
5. #Quiz #100 ##• english version• big point• very easy==========Determine the probability of getting a black card prime number when a card is drawn randomly from a deck of bridge cards
➡️Jawaban :
N(s) = 54
N(a) = (2,3,5,7)×2 = 4 × 2 = 8
[tex] \sf{p(a) = \frac{n(a)}{n(s)}} [/tex]
[tex] \sf{p(a) = \frac{8}{54}} [/tex]
[tex] \boxed{\sf{p(a) = \frac{2}{13}}} [/tex]
A-standard bridge cards consist of 52-cards that comprises 13 ranks in each of suits : clubs, diamonds, hearts, and spades. There are 2 colors of cards, the black-ones are clubs and spades, and the red-ones are diamonds and hearts.
A prime number of the cards are 2 , 3 , 5 , 7 (4 cards). So, the number of a black card prime number is 4 × 2 = 8
Let the event of getting a black card prime number is [tex]~\sf X[/tex]
Hence :
[tex]\sf n(S)=52\to~[/tex]the number of all cards
[tex]\sf n(X)=8\to~[/tex]the number of a black card prime number
[tex]\sf P(X)=\frac{n(X)}{n(S)}=\frac{8}{52}[/tex]
[tex]\sf P(X)=\frac{2}{13}[/tex]
So, the the probability of getting a black card prime number when a card is drawn randomly from a deck of bridge cards is [tex]\huge \sf \frac{2}{13}[/tex]
6. a) Do you think the card is a greeting card? Give your opinion!b) How can we determine the purpose of the sender giving the card?
a. yes it's a greeting card, karena kartu tersebut berisi rasa terima kasih seseorang kepada temannya, yang mana merupakan alah satu konten dari greeting card.
b. dengan membaca keseluruhan teks, dengan melihat tulisan2 tertentu pada teks (seperti contoh di atas 'Thanks a lot', bisa juga 'Congratulation, Happy . . ., Get well soon, dsb'.
7. The ratio of the number of rulers to the number of pens is 4 : 5 If the number of ruler is 16, the number of pens is
Jawaban:
20
Penjelasan dengan langkah-langkah:
maaf kalau salah :(
hope you like it!
8. For Wati's birthday, Mother has prepared 30 balloons. A total of 12 balloons are red and the rest are white. Determine the ratio of the number of red balloons to the number of white balloons.
Jawaban:
Red : White = 2 : 3
Penjelasan dengan langkah-langkah:
DIKETAHUI Total of balloons = 30, andRed balloons = 12.DITANYARatio = ...?CARADETERMINE THE NUMBER OF WHITE BALLOONS[tex] = 30 - 12 \\ = 18[/tex]
MAKE THE RATIO[tex] = R : W \\ = 12 : 18 \\ = 2 : 3[/tex]
Semogamembantu!
9. the difference of two positive number is 3, and the sum of their square is 117. determine the two number
4 - 1 = 3
5 - 2 = 3
6 - 3 = 3
7 - 4 = 3
8 - 5 = 3
9 - 6 = 3
...
Find the sum of the square with the result 117
16 + 1 ≠ 117
25 + 4 ≠ 117
36 + 9 ≠ 117
49 + 16 ≠ 117
64 + 25 ≠ 117
81 + 36 = 117
The two numbers are 9 and 6
10. There are 15 apples, 10 bananas, and 5 pears in a basket. The ratio of the number of bananas to the number of apples is __________ The ratio of the number of apples to the total number of fruit is __________ The ratio of the total number of fruit to the number of pears is __________
Jawaban:
2:3, 1:2, 6:1
Penjelasan dengan langkah-langkah:
Banana : Apple = 10 : 15 = 2 : 3
Apple : total number=15 : (15+10+5) = 15 : 30 = 1 : 2
total number : pears = (15+10+5) : 5 = 30 : 5 = 6 : 1
CMIIW
11. The number of Arman’s marbles is 2/3 of Budi's marbles. If their total marbles is 30, determine the number of marbles for each of them. Tolong ya guys.. thanks
2x + 3x = 30
5x = 30
x = 30/5
x = 6
Arman = 2x = 2.6 = 12
Budi = 3x = 3.6 = 18
12. Question 1. what kinds of the identity card is it? 2. when can we use the card? 3. what member number of him? 4. can we use this identity card in others places? 5. who can use this identity card?
Jawaban:
1. Apa jenis kartu identitas itu?
2. kapan kita bisa menggunakan kartu tersebut?
3. berapa nomor anggota dia?
4. bisakah kita menggunakan kartu identitas ini di tempat lain?
5. siapa yang dapat menggunakan kartu identitas ini?
Penjelasan:
Translate or answer??
This a translate
13. Suppose C = < 7, } a) Determine Cardinal Number of C b) Determine total subset of C c) Determine subset of C with 3 elements d) Determine subset of C with 4 elements
Jawaban:
B. kalau aku salah ya dimaafin
14. determine whether each of the following numbers is a factor of the number in the brackets 5 bracket 60 bracket
Tentukan apakah masing-masing angka berikut adalah faktor dari angka dalam braket 5 braket 60 braket
itu adalah artinya
faktor 5 = 5
faktor 60 = 2,2,3,5
so factors of 5 and 60 are
faktor 5 = 5
faktor 60 = 2,2,3,5
15. Determine LCM and GCF of the following pairs of number 12, 16, and 30
Jawaban:
terlampir
Penjelasan dengan langkah-langkah:
CGF itu FPB
LCM itu KPK
16. determine the number of the following number operations!is it 1 or 4? 4÷2(1+1)
Jawab:
4
Penjelasan dengan langkah-langkah:
=4÷2(1+1)
=2×2
=4
SEMOGA MEMBANTU DAN BERMANFAAT#
Jawaban:
4
Penjelasan dengan langkah-langkah:
4:2(1+1)
Kerjakan dalam kurung dahulu
4:2(2)
dikarenakan : dan x sama kuat jadi dikerjakan dari sebelah kiri
2(2)
2x2 = 4
17. Question1.What kinds of the identity card is it? 2.When can we use the card?3.What member number of him?4. Can we use this identity card in others places ?5.Who can use this identity card?
Jawaban:
1. library card
2. ???
3. 478
4. no, we can't.
5. Johanes Gunarwan
Penjelasan:
nomer dua engga saya jawab soalnya ga ketemu jawabannya. kalau bisa jadiin jawaban terbaik ya, thanks
Jawaban:
1. the kinds of the identity card it is library card
2. when to borrow from the library
3. the number of the card is 478
4. no, we can not
5. the ownership or called Johannes Gunarwan
18. Determine the result of the number calculations below using the rulers of significant number:a. 225 x 0,16b. (0,15)2 -(0,1)c. 2,5 x 0,625d. 25,8 +0,42 +2.026answer:
Jawaban:
225×0,16 =36
(0,15)2 -(0,1) = 0,2
19. 3. Determine the number of subsets of: a. A= {2,3,5,7, 11} b. B = {x|x < 7, xeis natural numbers } c. C = {x|2
Jawaban:
b. b=[xlx>7,xeis natural numbers ]
20. 1. What is the event of the card?2. What is the greeting of the card? 3. What is the message of the card?4. To whom will you give the card?5. What is the communicative purpose of the card?
1. Mother’s day
2. A special day for a very special lady !
3. Thank you for being an amazing mom
4. Mother
5. Thanks to her about a special mother’s day
Jawaban:
1. the event of the card is mother's day
2. the greeting of the card is "happy mother's day"
3. the message of the card is hank you for being an amazing mom
4. to my mom
5. the communicative purpose of the card is to say Happy Mother's Day to my mom
Penjelasan:
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