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3 years ago

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Your window thermometer shows that the temperature outdoors is 87.3°f. how should you report this temperature to your friend in

israel (i.e., on the celsius scale) and to your si-enthusiastic physicist neighbor (i.e., on the kelvin scale)?

1 answer:

Lorico [155]3 years ago

5 0

30.72 Cel
303.872 Kelvin

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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

3 years ago

Where would you find the asthenosphere?

Harman [31]

Answer:

b. upper mantle

Explanation:

low velocity zone of the upper mantle

3 0

3 years ago

Read 2 more answers

A scientist is studying a previously unknown chemical reaction. She concludes that it is exothermic. What must the scientist hav

SVEN [57.7K]

I think the correct answer from the choices listed above is the first option. She concluded that the reaction is an exothermic one because t<span>he reaction released heat. Exothermic is when heat goes out of the system. The opposite is referred to as an endothermic reaction.</span>

6 0

3 years ago

Read 2 more answers

Jennie observes her brother playing pool and has a theory that the potential energy in the pool stick is transformed into kineti

Shkiper50 [21]

A lot of theories exist in the world today regarding energy. The statement that explains how she can prove her theory is below:

He could measure the potential energy when the pool stick is pulled back before moving to strike the pool ball, and she could measure the kinetic energy of the ball in motion after the pool stick strikes it. There should be an equal amount of kinetic energy and potential energy to prove there was a transformation of potential energy to kinetic energy.

Potential energy is known to be of position relative, and kinetic energy is motion relative.

The relationship that exist between the two is their ability to transform into one another. That is potential energy transforms into kinetic energy, and kinetic energy converts into potential energy, and vice versa

If an outside force acts upon an object with potential energy, that force is said to change the potential energy into kinetic energy.

The full question is below

Jennie observes her brother playing pool and has a theory that the potential energy in the pool stick is transformed into kinetic energy when he hits the ball.

Which explains how she can prove her theory?

A

She could measure the potential energy in the motionless ball on the pool table, and she could measure the potential energy of the pool stick as it moves to strike the ball. These total of these two measurements will be equal to the kinetic energy in the pool ball as it moves, and this proves there was a transformation of energy.

B

She could measure the potential energy when the pool stick is pulled back to strike the pool ball, and then she could measure the kinetic energy in the pool stick as it moves to strike the ball. The potential energy in the pool stick and the kinetic energy in the pool stick should be equal, proving there was a transformation of energy.

C

She could measure the potential energy when the pool stick is pulled back before moving to strike the pool ball, and she could measure the kinetic energy of the ball in motion after the pool stick strikes it. There should be an equal amount of kinetic energy and potential energy to prove there was a transformation of potential energy to kinetic energy.

D

She could measure the potential energy of the pool ball when it was sitting on the table, and she could measure the kinetic energy of the ball in motion after the pool stick strikes it. There should be an equal amount of potential energy in the motionless ball and kinetic energy in the ball after the stick strikes it to prove there was a transformation of potential energy to kinetic energy.:

Learn more from

brainly.com/question/25841380

8 0

3 years ago

Balancing Chemical Equations Worksheet

Goshia [24]

The balanced chemical equation of the reactions given is as follows:

2LiHCO3 -----> Li2CO3 + H2O + CO2
2 N2 + 5 O2 -----> 2 N2O5
MgBr2 + KOH -----> KBr + Mg(OH)2
Mn + 2 CuCl -----> 2 Cu + MnCl2
8 Zn + S8 -----> 8 ZnS
2 NaOH + H2SO4 -----> 2 H2O + Na2SO4
2 K + 2 H2O -----> 2 KOH + H2
C5H12 + 8 O2 -----> 6H2O + 5 CO2
2 KOH + H2CO3 -----> 2 H2O + K2CO3
C4H802 + 6 O2 -----> 4 H20 + 4 CO2
16 Al + 3 S8 ---> 8 Al2S3

<h3>How to balance chemical equations</h3>

Balancing of chemical equations is the process of adding numerical coefficients in front of moles of reactants and products to ensure that the moles of atoms of elements of the reactants is equal to the moles of atoms of products formed.

The balanced chemical equation of the reactions given is as follows:

2LiHCO3 -----> Li2CO3 + H2O + CO2
2 N2 + 5 O2 -----> 2 N2O5
MgBr2 + KOH -----> KBr + Mg(OH)2
Mn + 2 CuCl -----> 2 Cu + MnCl2
8 Zn + S8 -----> 8 ZnS
2 NaOH + H2SO4 -----> 2 H2O + Na2SO4
2 K + 2 H2O -----> 2 KOH + H2
C5H12 + 8 O2 -----> 6H2O + 5 CO2
2 KOH + H2CO3 -----> 2 H2O + K2CO3
C4H802 + 6 O2 -----> 4 H20 + 4 CO2
16 Al + 3 S8 ---> 8 Al2S3

Learn more about balancing of chemical equations at: brainly.com/question/15428811

5 0

3 years ago