mark (√) if the given relation is afunction and (x) if not.

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Answer:

825 g

Step-by-step explanation:

Here's my work:

500g Cl2 l   1mol Cl2  l  2 mol NaCl   l  58.5 g NaCl

                l   71 g Cl2    l  1 mol Cl2      l    1 mol NaCl  

= 823.94  - the rounding can be a little off

The first thing you have to do is convert the 500 g of Cl2 into moles.  So you get the mass of Cl which is 35.5, but Cl is diatomic by itself so you multiply 35.5 x 2 and get 71.   now on the third column you are comparing the mol ratios of the equation.  The equation is 2Na + Cl2 ---> 2NaCl, so you see that there is no coefficient in front of Cl2 so that means there is 1 mol, and then you see that in the product there is a  coefficient of 2 in front of NaCl so that means there is 2 moles.  Then finally you have to convert the moles backs into grams where you just add the masses of Na and Cl .  You multiply across the top  and then divide that number by the bottom row.

Answer:

Where is the table?

Step-by-step explanation:

Answer:

H > 2.5

Step-by-step explanation:

Greater = >

Lessthan = <

Equal = =

Answer:

4

Step-by-step explanation:

Subtract 6 to both sides so you can get -12. Next divide -3 from x and -12. Finally your answer should be positive 4. Mark me brainily please if it is correct

Answer:

11.8

Step-by-step explanation:

18% of 10 so more the decimal only one time because you only have one 0 and you get 1.8. ok then 1.8 to 10 =11.8

The book cost $11.8  when the book store increases its prices by 18%.

A percentage is a value per hundredth. Percentages can be converted into decimals and fractions by dividing the percentage value by a hundred.

Given, A book cost $10 at one book store which is 100% of its price.

Now, The book store increases its prices by 18%.

Therefore, The new price of the book is (100 + 18) = 118% of $10 which is,

= (118/100)×10.

= 1.18×10.

= $11.8

learn more about percentages here :

https://brainly.com/question/24159063

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Answer:

4

Step-by-step explanation:

x + 2y = 2 + 2(1)

          = 2 + 2

          = 4

Answer:

8x + 4

Step-by-step explanation:

Simplified

group like terms: (+5x + 1X + 2x) = 8x (-4 + 8) = 4 add the positive sign so you can get an equation: +4, so your simplified expression would be 8x + 4

Answer:

7

Step-by-step explanation:

7b/b = 7...(b does not matter)

Answer:

Step-by-step explanation:

There are two sides on a coin, heads and tails. So, the probability  of flipping heads is going to be 1/2, as there is one chance out of the two options that you will flip a head. As for spinning blue, there are 3 options that are blue out of the four color options given. So, the probability of spinning blue would be 3/4. Hope this helped :) Take this with a grain of salt, though. It's been a while since I reviewed probabilities.

The required probability of landing on heads and spinning blue is 3/4.

Probability is defined as the possibility of an event being equal to the ratio of the number of favorable outcomes and the total number of outcomes.

There are two sides to a coin, heads, and tails.

So, the probability of flipping heads is going to be half, as there is one option out of the two options that you will flip a head.

As for spinning blue, there are three choices that are blue out of the four color options given.

So, the required probability = favorable outcomes / total outcomes

So, the required probability = 3/4

Hence, the probability of spinning blue would be 3/4.

Learn more about probability here:

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Answer:

a

Step-by-step explanation:

Answer and Step-by-step explanation:

Alot of these can be solved with the table up above the problems.

According to the table, every time a value has an exponent of 0, it would equal to 1. Since all A B and C values follow the 0 exponent, their value is 1.

According to the table, when we have a negative exponent, the number gets turned into a fraction of [tex]\frac{1}{x^x}[/tex]

Since our value is 9^-2, do as followed :

[tex]\frac{1}{9^2}[/tex]

Solve what is 9^2 :

[tex][\frac{1}{81} ][/tex]

[tex]\frac{1}{x^{-5} }[/tex]

This question is different, since we have to go backwards, we have to switch the negative exponent to a positive exponent and rid the fraction.

[tex]x^5[/tex]

[tex]5a^3b^{-2}[/tex]

Since we have one negative exponent, follow the fraction rule but instead of having one as the numerator, have 5a^3.

[tex]\frac{5a^3}{b^{2}}[/tex]

[tex]-3^4 = -3*-3*-3*-3=-81[/tex]

Since -3 is in parenthesis, we can rid the negative along with the parenthesis :

[tex](-3)^4=3^4=3*3*3=81[/tex]

Follow the negative exponent rule :

[tex](-3)^{-4}=\frac{1}{(-3)^4} =\frac{1}{3^4} =\frac{1}{3*3*3*3}= \frac{1}{81}[/tex]

Follow the negative exponent rule yet again :

[tex]-3^{-4}=-\frac{1}{3^4} =-\frac{1}{3*3*3*3} =-\frac{1}{81}[/tex]

Answer:

he

Step-by-step explanation:

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Answer:

Draw a line segment, say 5 cm long.

Below it draw a line segment 10 cm long, or whatever is twice the length!

Hope that helps!

Step-by-step explanation:

Answer:

y=1 x=15

Step-by-step explanation:

Answer:

x=15, y=1

Step-by-step explanation:

Answer:

y=3x-15

Step-by-step explanation:

y-y1=m(x-x1)

y-9=3(x-8)

y=3x-24+9

y=3x-15

Answer:

C. Biased, because she only asked students on honor roll.

Step-by-step explanation:

Since Mrs. Gilbert's goal was to find how many students that spent >4 hours and not how many students that earned Honor Roll that spent >4 hours, the data is biased. Choose C.

Answer:

Step-by-step explanation:

Answer:x = 14

My Step-by-step explanation:

Turn the problem around by switching around the division:

238/x=17 means 238/17=x so x = 14.