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Mathematics

2 answers:

Zielflug [23.3K]3 years ago

8 0

2moles of NaCl produced by 2 moles of NaClO_3
Let required moles be x .

$\\ \bull\sf\longmapsto 2:2=3:x$

$\\ \bull\sf\longmapsto \dfrac{2}{2}=\dfrac{3}{x}$

$\\ \bull\sf\longmapsto \dfrac{3}{x}=1$

$\\ \bull\sf\longmapsto x=3mol$

kifflom [539]3 years ago

5 0

Answer:

• From the equation

${ \rm{2 \: moles \: of \: chlorate = 2 \: moles \: of \: chloride}} \\ { \rm{3 \: moles \: of \: chlorate = ( \frac{3}{2} \times 2)}} \\ \\ = { \boxed{ \rm{3 \: moles}}}$

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What is x-intercept of y=-3x+5

Yuri [45]

Answer:

To find x intercept, u graph it

the x intercept is 1.67

Step-by-step explanation:

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3 years ago

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skelet666 [1.2K]

A. Let x = cheese and
y = chocolate
2x + y = 25
x + y = 20

B. Subtract the second equation from the first.
2x + y = 25
-(x + y = 20)
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x = 5

Plug 5 back in to the second equation and solve for y.
x + y = 20
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Used elimination method because coefficients on the y values were both 1 so it was easy to subtract the equations and eliminate the y variable.

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3 years ago

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Veronika [31]

Answer:

(4, -2) (see attached)

Step-by-step explanation:

Vector addition on a graph is accomplished by placing the tail of one vector on the nose of the one it is being added to. The negative of a vector is in the direction opposite to the original.

<h3>vector components</h3>

The components of the vectors are ...

u = (1, -2)

v = (-6, -6)

Then the components of the vector sum are ...

2u -1/3v = 2(1, -2) -1/3(-6, -6) = (2 +6/3, -4 +6/3)

2u -1/3v = (4, -2)

<h3>graphically</h3>

The sum is shown graphically in the attachment. Vector u is added to itself by putting a copy at the end of the original. Then the nose of the second vector is at 2u.

One-third of vector v is subtracted by adding a vector to 2u that is 1/3 the length of v, and in the opposite direction. The nose of this added vector is the resultant: 2u-1/3v.

The resultant is in red in the attachment.