Tomando el cociente entre la masa de la muestra y la masa de un átomo, veremos que hay 1.7*10^21 átomos de uranio en la muestra.
¿Como podemos determinar el número de átomos?Para determinar el número de átomos en la muestra, simplemente debemos dividir la masa de la muestra (0.7 gramos) por la masa de un átomo de uranio (4*10^(-25) kg)
Donde la complicación viene por que tenemos distintas unidades.
Para resolver esto, podemos escribir la masa de la muestra en kilogramos.
Sabemos que: 1g = 1*10^-3 kg
Entonces podemos reescribir la masa de la muestra como:
0.7g = (0.7)*(10^-3 kg) = 7*10^-4 kg
Ahora si podemos tomar el cociente, el número de átomos esta dado por:
[tex]N = \frac{7*10^{-4}kg}{4*10^{-25}kg} = 1.7*10^{21}[/tex]
Así podemos concluir que hay 1.7*10^21 átomos de uranio en la muestra.
Sí quieres aprender más sobre átomos, puedes leer:
https://brainly.com/question/16929981
What is the value of x in the equation below
6(x-8)=72
Answer:
x = 20
Step-by-step explanation:
6(x-8)=72
6x-48=72
6x-48+48=72+48
6x=120
6x/6=120/6
x = 20
hope it's helpful ❤❤❤❤❤❤
THANK YOU.
#
Answer: x=20
Step-by-step explanation:
Distribute the 6 to the values in the parentheses
6x - 48 = 72
Add 48 to each side
6x = 120
Divide each side by 6
x = 20
what is the measure of the missing angle?
Answer:
137 degrees
Step-by-step explanation:
By using the fact that a triangle contains 180 degrees and angles made by the same lines are congruent we can find out that the top angle in the first triangle is 45 degrees. We can then figure out that the missing angle in that same triangle is 75 degrees by adding 45 and 60 and subtracting that from 180. Then we add that 75 degrees to 68 degrees to get 143 degrees which we can use to discover that the corner of the triangle that connects to the other triangle is 37 degrees. From there we know that triangles contain 180 degrees, so the remaining value is 43 and with this we can discover that the value of the asked for angle is 137 degrees.
PLEASE ONLY ANSWER WITH A PROPER ANSWER FOR EACH ONE...NOT JUST FOR POINTS-Thank you so muchhhh
Answer:
[tex]x > \frac{1}{2}[/tex]
Step-by-step explanation:
For the first one, in any triangle, we have the sum of two sides is greater than the third side. Hence, we have 3 inequalities: [tex]4x+3>2x+1, 5x+1>x+3, 3x+4>3x[/tex], which give us [tex]x>-1, x>\frac{1}{2},4>0[/tex]. We conclude that [tex]x>\frac{1}{2}[/tex].
For the second question, we have [tex]AB<BP+AP=2x[/tex], and similarly we can show that [tex]AC, BC<2x[/tex]. Hence, [tex]AB+BC+AC<6x[/tex].
The third question is not very clear.
Solve 8x – 5 = 23 + 4x.
Answer: X equals 7
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
First you want to simplify the equation
8x + (-5) = 23 + 4x
-5 + 8x = 23 + 4x
Then solve for x, but before we do that we !!!must!!! move all terms that have x to the left. Everything else would go to the right.
So we add -4x to both sides ..
-5+ 8x + (-4x) = 23 + 4x + (-4x)
-5 + 4x = 23 + 4x + (-4x)
-5 + 4x = 23 +0
-5 + 4x = 23
Then add 5 to both sides of the equation:
-5 + 5 + 4x = 23 + 5
0 + 4x = 23 + 5
4x = 23 + 5
4x = 28
Then divide each side by 4:
x = 7
And there you have it. The answer is 7. Hope this helps! :)
Two straight lines have equations y = p x + 4 y = p x + 4 and p y = q x − 7 p y = q x − 7 , where p p and q q are constants. The two lines meet at the point ( 3 , 1 ) ( 3 , 1 ) . What is the value of q q ?
Answer:
q = [tex]\frac{8}{3}[/tex]
Step-by-step explanation:
The point of intersection (3, 1 ) is the solution to both equations
Using
y = qx - 7 and substituting x = 3, y = 1
1 = 3q - 7 ( add 7 to both sides )
8 = 3q ( divide both sides by 3 )
[tex]\frac{8}{3}[/tex] = q
(problem is in picture)
Answer: A
Step-by-step explanation: since X>y and y>z
write an equation that represent the line
Answer:
(1,-4) and (3,-5)
-4+5/1-3
1/-2 , so the slope is -1/2
Y intercept is -3.5
ANSWER IS y=-1/2x-3.5
THANKSS :)
If x=3m-4 and y=6-m, which of the following expresses y in terms of x
Answer:
What you want to do is solve for m in whichever equation it's easier to so in, then substitute that in to the other equation. For instance:
X=3m-4
Y=6-m
Solve the 2nd equation to get m=6-y
Plug that into the first equation to get x=3(6-y)-4
X=18-3y-4
X-14=-3y
14-x=3y
Y=(14-x)/3
I need help plz help me on this i will give u brainless on this question
Answer:
Equations: y=x+3 and y=-1/2x
solution: (-2,1)
Step-by-step explanation:
what is the sqaure root of 184
Step-by-step explanation:
13.56 is the square root of 184
The circle below is centered at (-3, 2) and has a radius of 3. What is its
equation?
A. (x-3)2 +(- 2)2 = 9
B. (x+3)2 + (y-2)2 = 3
C. (x+3)2 + (y-2)2 = 9
D. (x-3)2 + (y-2)2 = 3
Answer:
C
Step-by-step explanation:
The equation is (x-a)^2 + (y-b)^2 = r^2
(x+3)^2+(y-2)^2 = 9
Find the value of x acellus
Help
Answer: x = 3
because ΔABC has BD is the bisector of ∠ABC
=> AD/AB = DC/BC
⇔ x/6 = 4/8
⇔ x/6 = 1/2
⇔ x = 6.1/2
⇔ x = 3
Step-by-step explanation:
Answer: x=3
Step-by-step explanation:
A prescription for Singulair costs $14 for a month's supply. How much will this prescription cost for a year?
PLS HELP HW DUE IN 2MIN!!!!
If DF and GI are parallel lines and mGHE = 47°, what is mIHE?
Answer:
mIHE should be 133°
Step-by-step explanation:
A line is 180°, so, if you take 47° off you're left with 133.
Giving you an answer of 133°.
Simplify this expression (xy^4)^6
Answer:
x^6*y^24
Step-by-step explanation:
This will become:
[tex]x^6*(y^4)^6[/tex]
Next, multiply the exponents for y:
x^6 * y^24
So the answer is x^6*y^24
help, this is incorrect! (can you help with working out?)
Answer:
262 × 39 ÷ 100 = 10218 ÷ 100 = 102.18
Step-by-step explanation:
This is the correct answer your's is wrong.
Multiply and simplify.
x2⋅x⋅x5
Enter your answer in the box. Use the carat symbol ^ (shift 6) to represent exponents ( for example, x2= x^2). Do not include spaces.
plz help and explain
Answer:
x11
Step-by-step explanation:
All I did was add the like terms.
Answer:
[tex]x^{8}[/tex] is the correct answer
Step-by-step explanation:
[tex]x^{2} *x*x^{5}[/tex]
[tex]x^{2} xx^{5\\[/tex]
[tex]x^{2+1+5}[/tex]
[tex]=x^{8}[/tex]
I hope this helps
:)
I need help please!!!
Solve the system by substitution.
y=-4x
y=x-5
Step by step pls I’ll make u brainly
Answer:
a = 6
Step-by-step explanation:
120 = 3 + 3(7a - 3) (by PEDMAS, expand parentheses first by distributive property)
120 = 3 + 7a(3) - 3(3)
120 = 3 + 21a - 9
120 = 21a - 6 (add 6 to both sides and rearrange)
21a = 120 + 6
21a = 126 (divide both sides by 21)
a = 126/21
a = 6
Step-by-step explanation:
120-(3+3*(7*a-3))=0
Step by step solution :
STEP
1
:
Equation at the end of step 1
120 - (3 + 3 • (7a - 3)) = 0
STEP
2
:
STEP
3
:
Pulling out like terms :
3.1 Pull out like factors :
126 - 21a = -21 • (a - 6)
Equation at the end of step
3
:
-21 • (a - 6) = 0
STEP
4
:
Equations which are never true:
4.1 Solve : -21 = 0
This equation has no solution.
A a non-zero constant never equals zero.
Solving a Single Variable Equation:
4.2 Solve : a-6 = 0
Add 6 to both sides of the equation :
a = 6
One solution was found :
a = 6
Find the product. Enter the product in simplest form.
Answer:
5
Step-by-step explanation:
You multiply/divide all the fractions with each other.
An elementary school
busses hold 48 students
rides a bus to and from
How many busses do they
ANSWER
How do you know your answer is com
Answer:
48 x 2 if its to and from use caculator and do " 48 x 2"
Step-by-step explanation:
sorry if im wrong
IF YOU $80 AND THEN GET $20 MORE,WHAT IS THE PERCENTAGE
Answer:
100% for 100 dollars
Step-by-step explanation:
i think so im not sure
Which point is the same distance from the y -axis but on the opposite side of the y -axis as point C ?
Answer:
H ( -4, -3 )
Step-by-step explanation:
i dont know just big brain
no need to thank me.
Answer:
H ( -4, -3 )
Step-by-step explanation:
solve the equation 3(x+1)+2x=1/2(10x-14)
Plz show the steps
Answer:
x=-2
Step-by-step explanation
1) Remove () and Rewrite
13x+13+2x=1/2x2(5x-7)2) Collect Like Terms
15x+13=5x-73) Move Terms
15x-5x=-7-134) Divide Both Sides
10x=-20ANSWER IS x=-2
Answer:
0=−20
Step-by-step explanation:
Distribute
Combine like terms
Combine multiplied terms into a single fraction
Multiply by 1
Subtract from both sides of the equation
determine whether the order pair (3,1) is a solution to the system of equations
Answer:
Yes, it is
Step-by-step explanation:
Ok sorry wish I can help promise
look at my favorite player
Answer:
who was that is TD's wrld
Answer:
yep umm ... he is very Good player... Good choice
A Flags amusement park is just opened
up. A year pass costs $150,
but if you buy a pass this month, you can
receive a $75 discount. What is the
percent discount you can save ?
Round your answer to the nearest
hundredth.
Answer:
50%
Step-by-step explanation:
All it asks," what percent of 150 is 75"
then, (75/150)*100=50
help meee will give brainly! Find the domain of the function f(x)=5x−9 .
DONT SAY I DONT KNOW
Answer and Step-by-step explanation:
[tex]\frac{5}{x-9}[/tex]
The domain is all real numbers except 9 (positive)
This is because we can't have 0 in the denominator, and when x equals 9, then the denominator is 0. Anything divided by 0 is undefined, which is why 9 (in this equation) is not included.
#teamtrees #WAP (Water And Plant)
What are all the figures that are parallelograms? PLEASE HELP
How to solve 6-9(-5s-9)=10s-9+3s
Answer:
Step-by-step explanation:
6-9(-5s-9)=10s-9+3s
6+45s+81=13s-9
32s=-96
s=-3
Answer:
1+1=11
Step-by-step explanation:
that the answer hahahahhaha