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vekshin1
4 years ago
8

A raindrops has a mass of 0.50g. how many moles of water does a raindrop contain

Mathematics
1 answer:
alina1380 [7]4 years ago
7 0
So, here you have to look at the periodic table and see what the molar mass of each molecule composing the water compound H_2 O
its two hydrogen atom plus an oxygen molecule, making it about 18g per mol.

That said, looking at the mass, we have to ask ourselves, if a mol of water contains 18g of mass, how many moles do we have in 0.5g of water? 
We just do a cross multiplication:
\frac{(0.5)}{18} =0.027 mol
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Determine the domain and range of (g ○ f)(x) if f of x is equal to 9 over the quantity x squared minus 9 end quantity and g(x) =
Bezzdna [24]

The domain is all real numbers except -6 and 0. Hence, domain D: {x ∈ ℝ| x ≠ –6, 0}

Hence the range is all real numbers except -3 and 3. Hence, range R: (–∞, –3) ∪ (3, ∞)

Given the following functions:

f(x)=\frac{9}{x^2-9}\\g(x)=x+3

First we need to get the composite function f(g(x))

f(g(x)) = f(x+3)\\f(x+3)=\frac{9}{(x+3)^2-9} \\f(x+3)=\frac{9}{x^2+6x+9-9} \\f(x+3)=\frac{9}{x^2+6x} \\

Get the domain

The domain the values of x for which the function exists. The function cannot exists at when x = -6 and x = 0

  • Hence the domain is all real numbers except -6 and 0. Hence, domain D: {x ∈ ℝ| x ≠ –6, 0}

The range is the value of y for which the function exists. The function cannot exists at when x = -6 and x = 0

  • Hence the range is all real numbers except -3 and 3. Hence, range R: (–∞, –3) ∪ (3, ∞)

Learn more here: brainly.com/question/20838649

6 0
3 years ago
Read 2 more answers
Nia has $19.50 to ride the subway around New York. It will cost her $0.75 every time she rides. Identify the dependent variable
ra1l [238]

Answer:

The correct answer is B. The number of rides and the total cost are both dependent variables, as both depend on the amount of money that Nia has.

Step-by-step explanation:

The total cost is dependent because it relies on how many rides Nia takes, and the $19.50 limit.

The number of rides is dependent on the limit of $19.50 because the $19.50 is the limit and the total amount of rides is locked by $19.50

I'm not sure, though.

5 0
3 years ago
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Pls help soon:)!! I'll give brainliest 
Roman55 [17]
Decay every two years over a period of t years:
Fourth option: f(t)=(0.75)^(t/2)

decay 2 times a year over a period of t years:
Second option: f(t)=(0.9306)^(2t)
Sixth option: f(t)=(0.8660)^(2t)

decay once per year over a period of t years:
First option: f(t)=(0.9306)^t
Third option: f(t)=(0.8660)^t
7 0
3 years ago
Find the slope of the line. y = 5/3x + 4
ioda

Answer:

slope= 5/3

Step-by-step explanation:

y=mx+b

slope=m

your welcome

7 0
3 years ago
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What is m in 1/3m = -4
ahrayia [7]

Answer:

m=-12

Step-by-step explanation:

Let's solve your equation step-by-step.

1  / 3 m= −4

Step 1: Multiply both sides by 3.

3*( 1  / 3 m) = (3) * (−4)

m=−12

3 0
3 years ago
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