alvaradovanessa14
10.12.2020 •
Mathematics
5 Clara states that r2 +5r + 3r is an equivalent expression to 9r.
Why Is Clara's statement Incorrect?
Choose all that apply.
A The expression r +5r+ 3r simplifles tor? + 8, which is not equivalent to 9r.
B When you substitute i forr In both expressions, r’ +5r4-3r has a value of
10 and 9r has a value or 9. These values are not equal.
C The expression ra +57 + 3r simplifles to 10r, which is not equivalent to 9r.
D When you substitute 2 for r In both expressions, rạ 50+ Br has a value or
20 and 9r has a value of 18. These values are not equal.
E When you substitute 4 for r in both expressions, r5r+ Br has a value or
48 and 9r has a value of 36. These values are not equal.
F The expression r +56 + 3r simplifies to rir + 8), which is not equivalent
to 9r.
Solved
Show answers
More tips
- A Animals and plants Why do cats go crazy over catnip?...
- W Work and Career Everything You Need to Know About MBA Programs...
- S Sport How to Do Push-ups Correctly?...
- S Style and Beauty How to Grow Hair Faster: Real Methods and Advice...
- F Family and Home How to Remove Fading from Clothes: Tips and Tricks...
- F Food and Cooking How to Make Polendwitsa at Home?...
- F Family and Home Parents or Environment: Who Has the Most Influence on a Child s Upbringing?...
- P Philosophy Unbelievable stories of encounters with otherworldly forces...
- L Leisure and Entertainment How to Choose the Perfect Gift for Men on February 23rd?...
- H Health and Medicine How to Treat Whooping Cough in Children?...
Answers on questions: Mathematics
- M Mathematics Solve the system of equations using the substitution method. Show all your steps. y = 15 + x 2x + 5y = 26...
- M Mathematics Keisha has 27 cars available to rent. Let c be the number of cars she would have left after renting r of them. Write an equation relating c to R. Then use this equation...
- M Mathematics Help me find 8.25% of 399...
- M Mathematics HELP PLS THIS IS DUE SOON AND I ONLY HAVE 2 MORE CHANCES TO GET IT RIGHT Find the following measures in circle O....
- M Mathematics Question 2 points) Simpliny 70 % 1 1...
- M Mathematics What s the product of (1/3x^2y)*(1/6xy^3)...
- M Mathematics Which expression is equivalent to (16 x Superscript 8 Baseline y Superscript negative 12 Baseline) Superscript one-half?....
- M Mathematics Simplify. Remove all perfect squares from inside the square root....
- M Mathematics If [g] = 18, which values for g are true?...
- M Mathematics Calvin states that the absolute values of opposite numbers have the same value. Enrique disagrees with Calvin and says the absolute values of opposite numbers are still...
Ответ:
Step-by-step explanation:
C
l
2
+
2
K
B
r
→
2
K
C
l
+
B
r
2
Given:
300
g
of
C
l
2
300
g
of
K
B
r
(a) Mass of
C
l
2
= 300g
Molecular mass of
C
l
2
= 2(35.45) = 70.906 g
/
m
o
l
No.of moles of
C
l
2
=
m
a
s
s
/
m
o
l
a
r
m
a
s
s
=
300
/
70.906
=
4.23
moles
Mass of
K
B
r
=
300
g
Molar mass of
K
B
r
=
39
+
79.9
=
118.9
g
/
m
o
l
No.of moles of
K
B
r
=
300
/
118.9
=
2.52
moles
Now,
Consider the equation:
C
l
2
+
2
K
B
r
→
2
K
C
l
+
B
r
2
1
mole of
C
l
2
= 2 moles of
K
C
l
4.23
moles of
C
l
2
= 2x4.23=
8.46
moles
2
moles of
K
B
r
= 2 moles of
K
C
l
2.52
moles of
K
B
r
=
2.52
moles
Now convert moles to mass,
Mass of
K
C
l
produced by
C
l
2
=
8.46
×
70.906
=
599.8
g
Mass of
K
C
l
produced by potassium bromide =
2.52
×
74.5
=
187.74
g