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3 years ago

What do the first jagged lines on the drum of a seismograph represent?

Chemistry

1 answer:

olga nikolaevna [1]3 years ago

3 0

Answer:

When you look at a seismogram, there will be wiggly lines all across it. These are all the seismic waves that the seismograph has recorded. Most of these waves were so small that nobody felt them.

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During a titration the following data were collected. A 50.0 mL portion of an HCl solution was titrated with 0.500 M NaOH; 200.

Travka [436]

<u>Answer:</u> The mass of HCl present in 500 mL of acid solution is 36.5 grams

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is HCl

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is NaOH.

We are given:

$n_1=1\\M_1=?M\\V_1=50.00mL\\n_2=1\\M_2=0.500M\\V_2=200.mL$

Putting values in above equation, we get:

$1\times M_1\times 50.00=1\times 0.500\times 200\\\\M_1=\frac{1\times 0.500\times 200}{1\times 50.00}=2M$

To calculate the mass of solute, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

Molar mass of HCl = 36.5 g/mol

Molarity of solution = 2 M

Volume of solution = 500 mL

Putting values in above equation, we get:

$2mol/L=\frac{\text{Mass of solute}\times 1000}{36.5g/mol\times 500}\\\\\text{Mass of solute}=\frac{2\times 36.5\times 500}{1000}=36.5g$

Hence, the mass of HCl present in 500 mL of acid solution is 36.5 grams

4 0

2 years ago

What kind of molecule is depicted here?

mina [271]

Explanation:

Methane molecule is depicted here

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3 years ago

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There are three ways to give an object a static charge. They are friction, conduction and induction. Two pieces of cellophane ta

kotykmax [81]

Answer:

b) The two pieces of tape will repel as both have obtained a static charge.

this is the right answer.

Explanation:

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3 years ago

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What mass measured in grams of iron would be produced if 4.0 moles of aluminum reacts with an excess of Fe₃O₄? 8Al + 3Fe₃O₄ → 4A

Alecsey [184]

C. 504g that’s the answer

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3 years ago

How can electrons in an atom move from one energy level to another?

Dimas [21]

When atoms absorb energy electrons move into higher energy level.These electrons lose energy by emitting light when they return to lower energy levels.

Sources: Google it !

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3 years ago