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Nataly_w [17]
2 years ago
8

you want to prepare a solution with a concentration of 200.0 μm from a stock solution with a concentration of 500.0 mm . at your

disposal you have 5-ml and 10-ml transfer pipettes and volumetric flasks of sizes 100 , 250 , 500 , and 1000 ml . which of the following serial dilutions will give you the 200.0 μm solution?
SAT
1 answer:
vazorg [7]2 years ago
8 0

Answer:

yea, so you do stuff

Explanation:

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Item 8 A store sells an outfit that consists of a shirt, a tie, and a pair of pants. The store purchases the shirt for $18, the
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What you would first do is take each price and subtract it to get for the Shirt $14.04, The Tie would be $9.36, & the pants would be $27.30. Now add that all up to get $60.63 which would be the Selling Price!

Hope this helped :)
8 0
2 years ago
There are 39 students in Ms. Salazar's chemistry class. If Ms. Salazar divides the class into 9 lab groups of 4 or 5 students ea
I am Lyosha [343]

Answer:

3 groups of 5

Explanation:

if x is the number of groups of four, and y is the number of groups of five, then 4x +5y =39 (four students per group of four times the # of groups of four,   and 5 students per group times the # of groups of five, which should equal the total amount of students, 39). also, x+y=9. (number of each type of group = 9 groups total).

then, use these two equations and solve for y, by "canceling out" x. there are many ways to do this, but i'm going to use subtraction.

4x-5y=39

x+y=9

you want to change the equation

x+y=9

into

4x+4y=36

by multiplying the whole equation by four. because in order to cancel out the x, you need it to equal zero. in the first equation, its 4x.

so its now

4x-5y =39  MINUS

4x+4y=36

___________

y=3

you can check your work because the remaining 6 groups of four (24 total students) plus the 3 groups of five (15 total students) adds up to equal 36

6 0
2 years ago
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Katen [24]
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6 0
2 years ago
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choose the best spanish word to complete the sentence. nélida __________ con ramiro ayer. jugaste jugó jugué jugamos
zvonat [6]

Answer:

Explanation:

Jugó is the answer because the verb has to be in simple past.

Yo jugué, tu jugaste,

ella Jugó, él Jugó, nosotros jugamos, ustedes jugaron, ellos jugaron.

6 0
2 years ago
Read 2 more answers
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