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3 years ago

Which statement best describes a bacterial cell?

Chemistry

2 answers:

Nata [24]3 years ago

7 0

B) it is a complete organism

KatRina [158]3 years ago

3 0

B.) it is a complete organism

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The following reaction is done at

bagirrra123 [75]

Answer: 280dm3

Explanation:Please see attachment for explanation

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3 years ago

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The half-life of Erbium-165 is 10.4 hours. After 24 hours a sample has been reduced to a mass of 2 mg. What was the initial mass

Pachacha [2.7K]

Answer:

$[A_0]=10\ mg$

$[A_t]=0.08245\ mg$

Explanation:

Given that:

Half life = 10.4 hours

$t_{1/2}=\frac{\ln2}{k}$

Where, k is rate constant

So,

$k=\frac{\ln2}{t_{1/2}}$

$k=\frac{\ln2}{10.4}\ hour^{-1}$

The rate constant, k = 0.06664 hour⁻¹

Time = 24 hours

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t = 2 mg

$[A_0]$ is the initial concentration = ?

So,

$2\ mg=[A_0]\times e^{-0.06664\times 24}$

$[A_0]=10\ mg$

Now, time = 3 days = 3*24 hours = 72 hours ( 1 day = 24 hours)

$[A_0]=10\ mg$

Thus,

$[A_t]=10\times e^{-0.06664\times 72}\ mg=0.08245\ mg$

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4 years ago

Which situation describes the best example of rotational motion?

Reika [66]

Answer:

yeah

Explanation:

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3 years ago

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The metal found in liquid state at ordinary temperature is

Black_prince [1.1K]

The metal found in liquid state at ordinary temperature is Mercury

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3 years ago

Which compounds have the empirical formula CH2O?

lara [203]

Answer:

The answer to your question is all the formulas in bold has the same empirical formula

Explanation:

Data

Empirical formula CH₂O

Process

To solve this problem factor the subscripts of each formula and compare the result with the empirical formula given.

a) C₂H₄O₂ factor 2 2(CH₂O)

b) C₃H₆O₃ factor 3 3(CH₂O)

c) CH₂O₂ this formula can not be simplified

d) C₅H₁₀O₅ factor 5 5(CH₂O)

e) C₆H₁₂O₆ factor 6 6(CH₂O)

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3 years ago

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