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tatuchka [14]
3 years ago
14

Which excerpt from "Bone Detective" best shows that Diane France is recognized as an expert in her line of work?

Chemistry
2 answers:
vitfil [10]3 years ago
4 0

Answer:

It is the first one

Explanation:

I already took the quiz so first me I also got a 100% in it and I passed college

yan [13]3 years ago
3 0

Answer:

a

Explanation:

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The seeds of a dandelion are wispy and very light. A single dandelion produces many seeds. How does the structure of the seeds r
solmaris [256]

Answer:

the answer will be number...D

8 0
3 years ago
1. A sample of aluminum absorbs 50.1 J of heat, upon which the temperature of the sample increases from 20.0°C to 35.5°C. If the
Maurinko [17]

Answer:

Mass of aluminium in sample = 3.591 g ≅ 3.6 grams

Explanation:

Given that,  A sample of aluminum absorbs 50.1 J of heat, upon which the temperature of the sample increases from 20.0°C to 35.5°C.

the specific heat of aluminum is 0.900 J/g- °C

The relation between heat absorbed and change in temperature is given by,   Q = msΔT.

where Q = heat absorbed

            m = mass of the substance

            s = specific heat of substance

          ΔT  = change in temperature

Now, in our case, Q = 50.1 J ; s = 0.900 J/g- °C; ΔT= 35.5-20 = 15.5°C

⇒ m =  \frac{Q}{s(T_{2} -T_{1}) }

⇒ m = \frac{50.1}{0.900(15.5)} = 3.591 g ≅ 3.6 g

⇒ m ≅ 3.6 g

5 0
3 years ago
Calculate the ph of the solution 0.2M Mg(OH)2
Kipish [7]

Mg(OH)2 is base

Oh = 0.2 x 2 = .4

Poh = - Log (.4)

= .3979

Ph + Poh = 14

Ph = 14 - .3979

= 13.60

6 0
3 years ago
Read 2 more answers
What is the empirical formula of the compound whose molecular formula is P4O10
Pepsi [2]
The empirical formula is the lowest reduced ration of the atoms present. In this case, it is P2O5
7 0
3 years ago
Read 2 more answers
A potassium hydroxide (KOH) solution has a molar concentration of 0.065 M, calculate the [H3O+], [OH-] and pH of the solution.
Tanya [424]

Answer:

1) [OH⁻] = 0.065 M

2) [H₃O⁺] = 1.54 x 10⁻¹³ M.

3)  pH = 12.81.

Explanation:

HCl is completely dissociated yo its ions in solution:

<em>KOH + H₂O  → H₃O⁺ + K⁺ + OH⁻, </em>

<em></em>

1) [OH⁻] = 0.065 M.

<em>2) [H₃O⁺]: </em>

∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.

∴ [H₃O⁺] = 10⁻¹⁴/[OH⁻] = 10⁻¹⁴/(0.065 M) = 1.54 x 10⁻¹³ M.

<em>3) pH: </em>

For strong acids like HCl:

pH = - log[H₃O⁺] = - log[1.54 x 10⁻¹³ M] = 12.81.

4 0
3 years ago
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