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3 years ago

If I add 35 mL of water to 225 mL of a 0.45 M NaOH solution, what will the molarity of the diluted solution be?

Mathematics

2 answers:

photoshop1234 [79]3 years ago

4 0

I don't know, do you know?

nata0808 [166]3 years ago

3 0

Answer:

I don't know the answer what is the answer

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Find the circumference of the circle. Rounded to the nearest tenth the circle is 40 in

Galina-37 [17]

Complete your queation

4 0

3 years ago

Someone please help explain this

AlekseyPX

I beed helo too please like thi scoment so u can come back

3 0

3 years ago

Find the radius of the circle containing 60° arc of a circle whose length is 14 m.

Sauron [17]

Given:

It is given that

$\begin{gathered} \theta\text{ = 60}^0 \\ Arc\text{ length = 14}\pi \end{gathered}$

Required:

The radius of the circle

Explanation:

The length of an arc is given by the formula,

$\begin{gathered} Arc\text{ length = }\frac{\theta}{360}\text{ }\times\text{ 2}\pi r \\ \end{gathered}$

Substituting the values in the formula,

$\begin{gathered} 14\pi\text{ = }\frac{60}{360}\text{ }\times\text{ 2}\times\pi\times r \\ r\text{ = }\frac{14\times360}{60\times2} \\ r\text{ = }\frac{5040}{120} \\ r\text{ = 42} \end{gathered}$

Answer:

Thus the radius of the circle is 42 m.

5 0

2 years ago

A shopper purchased 8 t shirts and 5 pairs of pants for 220. The next day he purchased 5 t shirts and 1 pair of pants. How much

myrzilka [38]

Answer:the price for one shirt is $20

the price for one pair of pants is $12

Step-by-step explanation:

The question is incomplete. The complete question is

A shopper purchased 8 t shirts and 5 pairs of pants for $220. The next day he purchased 5 t shirts and 1 pair of pants for $112. How much does a t shirt and each pair of pants cost.

The solution is

Let x represent the price for one t shirt.

Let y represent the price for one pair of pants.

A shopper purchased 8 t shirts and 5 pairs of pants for $220. This means that

8x + 5y = 220 - - - - - - - - - -1

The next day he purchased 5 t shirts and 1 pair of pants for $112. This means that

5x + y = 112 - - - - - - - - - - - 2

Multiplying equation 1 by 5 and equation 2 by 8, it becomes

40x + 25y = 1100

40x + 8y = 896

Subtracting, it becomes

17y = 204

y = 204/ 17 = 12

Substituting y = 12 into equation 2, it becomes

5x + 12 = 112

5x = 112 - 12 = 100

x = 100/5 = 20

7 0

4 years ago

Solving equation r^2+5r=-4

shusha [124]

$r^2+5r=-4\\\\r^2+5r+4=0\\\\r^2+r+4r+4=0\\\\r(r+1)+4(r+1)=0\\\\(r+4)(r+1)=0\\\\r=-4 \vee r=-1$

3 0

4 years ago