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Lubov Fominskaja [6]
3 years ago
13

What is the percent of N in NH3? (H = 1.008 amu, N = 14.01 amu) [?]%

Mathematics
1 answer:
babymother [125]3 years ago
3 0

Answer:82.24%

Step-by-step explanation:

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How do you get the answer for 10x4= _ x 5
andrezito [222]
10 • 4 = _ • 5

10•4=40

40/5=8
8 0
3 years ago
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Determine whether 81 − 49n4 is a difference of two squares. If so, factor it. If not, explain why.
Mumz [18]

We have

81-49n^4=9^2-(7n^2)^2

so this is indeed a difference of squares. Factorizing would give

81-49n^4=(9-7n^2)(9+7n^2)

making the answer D.

We can further factor the first term here and write

9-7n^2=3^2-(\sqrt 7\,n)^2=(3-\sqrt7\,n)(3+\sqrt7\,n)

but that's clearly out of the scope of this question.

7 0
3 years ago
E - 867 = 108; E = need help
lina2011 [118]
To solve for E you'll add 867 to 108.

E - 867 = 108
E = 108 + 867
E = 975

Hope this helps :)

7 0
3 years ago
if a sequence is defined recursively by f(0)=4 and f(n+1)= -3f(n+1)=-3f(n)+1 for n≥0, then f(3) is equal to? DESPERATELY NEED HE
muminat

f(3) is equal to -101.

<u>Step-by-step explanation</u>:

  • The sequence is followed by f(0)=4
  • The given expression is f(n+1)= -3f(n)+1

Put n=0,

f(0+1)= -3f(0)+1

f(1)= -3(4)+1

f(1)= -12+1 = -11

Put n=1,

f(1+1)= -3f(1)+1

f(2)= -3(-11)+1

f(2)= 33+1 = 34

Put n=2,

f(2+1)= -3f(2)+1

f(3)= -3(34)+1

f(3)= -102+1

f(3)= -101

5 0
3 years ago
I need help I'm so confused
borishaifa [10]
A = L x W = 8 x 17 = 136
answer
C. 136 sq. units
8 0
3 years ago
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