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2 years ago

15

Suppose two chemicals are reacted together. It takes 1000 kJ of energy to break the bonds of the reactants and 850 kJ of energy

are released by the formation of the products. What is the change in energy for the reaction?
A) 0kJ
B)150kJ
C)-150kJ
D)850kM

2 answers:

vekshin12 years ago

8 0

The answer will be ( B )

dlinn [17]2 years ago

3 0

B i think is is 150kj

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The table shows the steps for solving the given inequality for x.

Eduardwww [97]

We are given : -3(4-6x) < x+5.

Solution: -3 is in front of Parenthesis.

We need to multiply -3 by (4-6x).

So, we need to applying distributive property.

On distributing, we get

-12+18x < x+5 (By distributive property)

The reverse operation of addition is subtraction. So we need to subtract x from both sides, we get

-12+18x-x < x-x+5 (By subtraction property of equality).

-12+17x < 5

Now, we need to get rid -12 from left side.

So, we need to apply addition property of equality, we need to add 12 on both sides, we get

-12+12+18x < x+5+12 (By addition property of equality)

17x < 17

We need to get rid 17 from left side. So we need to apply division property of equality.

On dividing both sides by 17, we get

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3 years ago

This graph shows the solution to which inequality?

Ksenya-84 [330]

Answer:

The graph shows the solution of the inequality y > $\frac{4}{3}$ x - 2 ⇒ D

Step-by-step explanation:

In the inequality,

If the sign of inequality is ≤ or ≥, then the line that represents it must be a solid line

If the sign of inequality is < or >, then the line that represents it must be a dashed line

If the sign of inequality is > or ≥, then the shaded area must be over the line

If the sign of inequality is < or ≤, then the shaded area must be under the line

From the given graph

∵ The slope of the line = $\frac{2--6}{3--3}$ = $\frac{2+6}{3+3}$ = $\frac{8}{6}$ = $\frac{4}{3}$

∵ The y-intercept is (0, -2)

∵ The line is dashed and the shaded area is over the line

→ By using the 2nd and 3rd notes above, the line is dashed and

the sign of inequality is >

∴ The inequality is y > $\frac{4}{3}$ x - 2

∴ The graph shows the solution of the inequality y > $\frac{4}{3}$ x - 2

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2 years ago

If I have three sides one of them is 44 degrees 28 degrees and 24 degrees what type of triangle am I

Inessa05 [86]

By angle, you're a scalene triangle, and by angle, youre an acute triangle

5 0

3 years ago

Hi:) I need help with part 9(ii) ? Thanks :)!

Goshia [24]

Answer:

see explanation

Step-by-step explanation:

Given

2BD = 7BT , then

2(d - b ) = 7(t - b) ← distribute both sides

2d - 2b = 7t - 7b ( add 7b to both sides )

2d + 5b = 7t, thus

2 $\left[\begin{array}{ccc}10.5\\10\\\end{array}\right]$ + 5 $\left[\begin{array}{ccc}0\\3\\\end{array}\right]$ = 7t

$\left[\begin{array}{ccc}21\\20\\\end{array}\right]$ + $\left[\begin{array}{ccc}0\\15\\\end{array}\right]$ = 7t

$\left[\begin{array}{ccc}21\\35\\\end{array}\right]$ = 7t , thus

t = $\frac{1}{7}$ $\left[\begin{array}{ccc}21\\35\\\end{array}\right]$ = $\left[\begin{array}{ccc}3\\5\\\end{array}\right]$

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8 0

2 years ago

Read 2 more answers

PLZ HELP ME <br> I appreciate any help, especially if you can show me how you got the answer

Arte-miy333 [17]

Answer:

C

Step-by-step explanation:

Since this is an indererminate form, use L'Hopital

d(sint)/dt = cos(t)

d[ln(2e^t) - 1] = (2e^t)/[2e^t - 1]

As t --> 0,

cos(0) = 1

(2e^t)/[2e^t - 1] = 2

1/2 is the limit

5 0

3 years ago