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Helen [10]
3 years ago
5

I will give BRAINIEst please!!! help meeee omg

Chemistry
1 answer:
Alexxandr [17]3 years ago
4 0

Answer:

(a)57.48 percent (b) 29.45 percent

Explanation:

copper(II) bromide is 29.45 percent copper and 71.54 percent bromine. so the first element percentage composition is always the percentage composition of the compound.

that goes same with sodium hydroxide. it  is 57.48 percent sodium, 40 percent oxygen, and 2.52 percent hydrogen.

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How many grams of a 26.9% sugar solution contain 49.0 g of sugar?
Ronch [10]

Answer:

182.156g

Explanation:

grams = 49/.269 = 182.156g needed

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What are slime Molds?
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Answer:

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5 0
2 years ago
Read 2 more answers
2. A shopper in a supermarket takes a box of sugar from a shelf that is 1.5 m high because he is
muminat

Explanation:

kinetic energy?? idek hope I helped in anyway possible

7 0
3 years ago
A large cyclotron directs a beam of He++ nuclei onto a target with a beam current of 0.250 mA. (a) How many He++ nuclei per seco
nikitadnepr [17]

Answer:

a. 7.8*10¹⁴ He⁺⁺ nuclei/s

b. 4000s

c. 7.7*10⁸s

Explanation:

I = 0.250mA = 2.5 * 10⁻³A

Q = 1.0C

1 e- contains 1.60 * 10⁻¹⁹C

But He⁺⁺ Carrie's 2 charge = 2 * 1.60*10⁻¹⁹C = 3.20*10⁻¹⁹C

(A).

No. Of charge per second = current passing through / charge

1 He⁺⁺ = 2.50 * 10⁻⁴ / 3.2*10⁻¹⁹C

1 He⁺⁺ = 7.8 * 10¹⁴ He⁺⁺ nuclei

(B).

I = Q / t

From this equation, we can determine the time it takes to transfer 1.0C

I = 1.0 / 2.5*10⁻⁴ = 4000s

(C).

Time it takes for 1 mol of He⁺⁺ to strike the target =?

Using Avogadro's ratio,

1.0 mole of He = (6.02 * 10²³ ions/mol ) * (1 / 7.81*10¹⁴ He ions)

Note : ions cancel out leaving the value of the answer in mols.

1.0 mol of He = 7.7 * 10⁸s

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3 years ago
4. If the speed of an object increases, its kinetic energy
Studentka2010 [4]

Answer:

I think the answer is increases

8 0
2 years ago
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