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3 years ago

13

After observing a moth that is camouflaged against dark colored bark, a scientist asks a question .?

2 answers:

Vlada [557]3 years ago

8 0

The question the scientist may ask is, “Which moth species would have a higher chance of survival in its given surroundings?”

spayn [35]3 years ago

5 0

Two things can apply here he can either broaden his scope based on the existing Data or Come up with a new way to test the question

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identify what type of mixture powdered chalk and powdered table salt is and suggest a technique for separating their components

Iteru [2.4K]

This is a homogenous mixture because you cannot differentiate between the members of the mixture. A technique might be heating them until one melts and evaporates due to different boiling temperatures, or mixing them together with fluids that would dissolve one, yet keep the other one whole.

7 0

3 years ago

Suppose you have a 0.10 M solution of AlBr3. What is the concentration of each ion? A. 0.10 M Al3+ ions and 0.30 M Br- ions B. 0

podryga [215]

<u>Answer:</u> The concentration of $Al^{3+}$ ions is 0.10 M and that of $Br^-$ ions is 0.30 M

<u>Explanation:</u>

We are given:

Concentration of $AlBr_3$ = 0.10 M

The chemical equation for the ionization of aluminium bromide follows:

$AlBr_3\rightarrow Al^{3+}+3Br^-$

1 mole of aluminium bromide produces 1 mole of aluminium ions and 3 moles of bromide ions

So, concentration of aluminium ions = 0.10 M

Concentration of bromide ions = $[(3\times 0.1)]=0.3M$

Hence, the concentration of $Al^{3+}$ ions is 0.10 M and that of $Br^-$ ions is 0.30 M

8 0

3 years ago

What is the percentage of oxygen in air<br> ASAP...

abruzzese [7]

Explanation:

21 % of oxygen is present in air .

hope it is helpful to you

3 0

3 years ago

Recrystallization Step: The procedure asks for using equal amount by mass of the crude product and the recrystallization solvent

zubka84 [21]

Answer : The volume (in mL) of 95% ethanol added would be, 1.39

Explanation :

As we are given that:

Mass of 95 % ethanol = 1.2 g

Density of 95 % ethanol = 0.86 g/mL

Formula used :

$\text{Volume of ethanol}=\frac{\text{Mass of ethanol}}{\text{Density of ethanol}}$

$\text{Volume of ethanol}=\frac{1.2g}{0.86g/mL}$

$\text{Volume of ethanol}=1.39mL$

Therefore, the volume (in mL) of 95% ethanol added would be, 1.39

4 0

3 years ago

How many moles are in 2.1 x 10^{24} molecules SiO4

lozanna [386]

Answer: 3.5 moles

Explanation:

Based on Avogadro's law:

1 mole of any substance has 6.02 x 10^23 molecules

So, 1 mole of SiO4 = 6.02 x 10^23 molecules

Zmoles of SiO4 = 2.1 x 10^{24} molecules

To get the value of Z, cross multiply:

(2.1 x 10^{24} molecules x 1mole) = (6.02 x 10^23 molecules x Z moles)

2.1 x 10^{24} molecules = (6.02 x 10^23 x Z)

Z = (2.1 x 10^{24}) ➗ (6.02 x 10^23)

Z = 3.5 moles

Thus, there are 3.5 moles of SiO4.

4 0

3 years ago