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Rashid [163]
2 years ago
11

HELP PLEASEE LKSJAKN I BEG U

Chemistry
1 answer:
ryzh [129]2 years ago
6 0

Answer:

1.2

Explanation:

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Adding luminol to water creates a physical or chemical change ​
faust18 [17]
Answer: chemical

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7 0
3 years ago
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A chemist measures the amount of hydrogen gas produced during an experiment. She finds that 264. g of hydrogen gas is produced.
Lesechka [4]

Answer:

The answer is 130.953 g of hydrogen gas.

Explanation:

Hydrogen gas is formed by two atoms of hydrogen (H), so its molecular formula is H₂. We can calculate is molecular weight as the product of the molar mass of H (1.008 g/mol):

Molecular weight H₂= molar mass of H x 2= 1.008 g/mol x 2= 2.01568 g

Finally, we obtain the number of mol of H₂ there is in the produced gas mass (264 g) by using the molecular weight as follows:

mass= 264 g x 1 mol H₂/2.01568 g= 130.9731703 g

The final mass rounded to 3 significant digits is 130.973 g

4 0
2 years ago
Do centromeres divide at anaphase i or ii
ddd [48]
Anaphase 1 is when centromeres divide
7 0
3 years ago
I do not know the answer. Please help
BaLLatris [955]

I am sorry I don't know, points are points though

4 0
2 years ago
If charge on only one object is tripled, determine the new force between them:
Allisa [31]

Answer:

+3·F

Explanation:

The number of objects in the given system = 2 objects

The charge on each object are; q₁ = -Q, q₂ = -Q

The force acting between the objects = +F

The distance between the objects = 2·d

The formula for the force acting between two charged particles is given as follows;

F=K \times \dfrac{q_{1} \times q_{2}}{r^{2}}

Therefore, we get;

F=K \times \dfrac{-Q \times -Q}{(2\cdot d)^{2}} = K \times \dfrac{Q^2}{4 \cdot d^2}

By tripling the charge, q₁, on the first object, we get;

q₂ = 3 × (-Q)

F_2=K \times \dfrac{-3 \cdot Q \times -Q}{(2\cdot d)^{2}} = K \times \dfrac{3 \cdot Q^2}{4 \cdot d^2} = 3 \times +F = +3\cdot F

Therefore, the new force between them, F₂ = +3·F

5 0
3 years ago
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