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3 years ago

Can someone one help me I need to write it it’s due tomorrow

Chemistry

2 answers:

Stels [109]3 years ago

4 0

Movement, Respiration, Sensitivity, Growth, <span>Reproduction, Excretion and Nutrition </span>

RUDIKE [14]3 years ago

3 0

You can determine it by its movement and alive things also need food
For example , plants are alive we can see that because of their movement, they are growing, and they need water and sunlight to make their food , plants are in one place in the ground but we can still see the movement because they are growing taller

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A fossil is found to have a 14 C 14C level of 70.0 70.0 % compared to living organisms. How old is the fossil?

natulia [17]

Answer:

The age of the fossil be $2.1987\times 10^{4} years$ .

Explanation:

Formula used :

$N=N_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}$

where,

$N_o$ = initial mass of isotope C-14 = x

N = mass of the parent isotope left after the time, (t) = 70.0% of x=0.07x

$t_{\frac{1}{2}}$ = half life of the isotope C-14 = 5730 years

$\lambda$ = rate constant

Let the age of the fossil be t.

Now put all the given values in this formula, we get t :

$0.07x=x\times e^{-(\frac{0.693}{5730 years})\times t}$

$t=2.1987\times 10^{4} years$

The age of the fossil be $2.1987\times 10^{4} years$ .

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3 years ago

How is ethanol made from sugar soloution. What is the process called?

Mice21 [21]

Answer:Ethanol can be made by a process called fermentation. During fermentation, sugar (glucose) from plant material is converted into ethanol and carbon dioxide. ... 90 per cent of the world's ethanol is made using fermentation.

Explanation:

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3 years ago

What is the atomic number of magnesium?

nika2105 [10]

Magnesium's atomic number is 12

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3 years ago

Convert 220 grams of CO2 into Moles.

LenaWriter [7]

Answer:

. 44.0 g/mol.

Explanation:

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3 years ago

Read 2 more answers

What volume of 15.7 M H2SO4 is required to prepare 12.0 L of 0.156 M sulfuric acid?

kirza4 [7]

The volume of 15.7 M H2SO4 is required to prepare 12.0 L of 0.156 M sulfuric acid is 0.12 L

<h3>Data obtained from the question</h3>

From the question given above, the following data were obtained:

Molarity of stock solution (M₁) = 15.7 M
Volume of diluted solution (V₂) = 12 L
Molarity of diluted solution (M₂) = 0.156 M
Volume of stock solution needed (V₁) = ?

<h3>How to determine the volume of the stock solution needed</h3>

The volume of the stock solution needed can be obtained by using the dilution formula as shown below:

M₁V₁ = M₂V₂

15.7 × V₁ = 0.156 × 12

15.7 × V₁ = 1.872

Divide both side by 15.7

V₁ = 1.872 / 15.7

V₁ = 0.12 L

Thus, the volume of the stock solution needed to prepare the solution is 0.12 L

Learn more about dilution:

brainly.com/question/15022582

#SPJ1

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1 year ago