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3 years ago

What is an easy way to measure the volume of an irregular shaped object?

Chemistry

1 answer:

pickupchik [31]3 years ago

4 0

Answer: Water displacement

Explanation:

When you put an irregularly shaped object in a graduated cylinder, the water level rises. Subtract the original number of ml from the number of ml it was displaced, and you get its volume.

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In the Tough Man Competition, very strong men are challenged to push or pull extremely large and heavy objects to test their str

Sergeeva-Olga [200]

Sorry i don’t know the answer i just wanted to inform you that, that persons link is fake.

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3 years ago

Using the standard enthalpies of formation, what is the standard enthalpy of reaction?

tester [92]

In this case, the reference forms of the constituent elements are O 2(g) and graphite for carbon. Using the values in the above table of standard enthalpies of formation, calculate the ΔHreactiono for the formation of NO2(g). The relevantstandard enthalpy of formation values from Table 1 are: O2(g): 0 kJ/mol.

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3 years ago

The total pressure of gas collected over water is 740.0 mmHg and the temperature is 24.0°C What is the pressure of

andrew11 [14]

The pressure of the hydrogen gas formed is given by its partial pressure at

the given temperature.

The pressure of the hydrogen gas formed is approximately 717.38 mmHg.

Reasons:

The pressure of the hydrogen gas formed is given by the difference

between the vapor pressure of the gas collected and the vapor pressure of

water.

The vapor pressure of water at 24.0 °C is given by the Clausius-Clapeyron

Equation as follows;

$ln \left(\dfrac{P_2}{P_1} \right) = \dfrac{\Delta H_{vap}}{R} \cdot \left(\dfrac{1}{T_1} - \dfrac{1}{T_2} \right)$

Where;

P₁ = The partial pressure at temperature, T₁

P₂ = The pressure at temperature, T₂

We get;

$ln \left(\dfrac{P_2}{23.8 \ mmHg} \right) = \dfrac{44,000 \ J/mol}{8.3145 \ J/(mol \cdot K)} \cdot \left(\dfrac{1}{298 \ K} - \dfrac{1}{297.15 \ K} \right)$

The pressure of water at 24.0 °C, P₂ ≈ 22.62 mmHg

The vapor pressure of water at 24.0°C is 22.62 mmHg

Therefore;

The pressure of the hydrogen gas formed ≈ 740.0 mmHg - 22.62 mmHg = 717.38 mmHg

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3 years ago

Pleas anyone

Varvara68 [4.7K]

Answer:

1. HCl + Fe

2. HNO3 + NaOH

Explanation:

3 0

2 years ago

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The half-life of a radioisotope is The half-life of a radioisotope is the time it takes for the radioisotope to become an isotop

uranmaximum [27]

Answer: the time it takes for one-half of the sample to decay.

Explanation:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

Radioactive decay process is a type of process in which a less stable nuclei decomposes to a stable nuclei by releasing some radiations or particles like alpha, beta particles or gamma-radiations. The radioactive decay follows first order kinetics.

Half life is represented by $t_{\frac{1}{2}$

$t_{\frac{1}{2}=\frac{0.693}{\lambda}$

$\lambda$ = rate constant

Thus the half-life of a radioisotope is the time it takes for one-half of the sample to decay.

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3 years ago

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