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miss Akunina [59]
3 years ago
11

If 1.35 g of aluminum occupies 0.500 cm^3. what is the density of aluminum

Chemistry
1 answer:
qaws [65]3 years ago
6 0

Answer:

2.7

Explanation:

Density= mass/volume

= 1.35/0.500

= 2.7

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The freezing point of a substance is -20°C. Its boiling point is 120°C.
Tasya [4]

Answer:

a. liquid

b. solid

c. gas, (should be at it's boiling point)

Explanation: If the normal melting point of a substance is below room temperature, the substance is a liquid at room temperature. Benzene melts at 6°C and boils at 80°C; it is a liquid at room temperature. If both the normal melting point and the normal boiling point are above room temperature, the substance is a solid.

if you need an explanation to each lmk

8 0
3 years ago
Which characteristic is a behavior adaptation in birds?
Gwar [14]

of course migration

Explanation:

if you need help again i'll be there.

7 0
3 years ago
Read 2 more answers
Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.0 × 10 2 mL of solution
vesna_86 [32]

Answer:

pH = 12.65

Explanation:

From the given information:

number of moles =mass in gram / molar mass

number of moles of KOH = mass of KOH / molar mass of KOH

number of moles of KOH =  0.251 g / 56.1 g/mol = 0.004474 mol

For solution :

number of moles = Concentration × volume

concetration = number of moles/ volume

concetration = 0.004474 mol / 0.100 L

concetration  = 0.04474 M

We know that 1 moles KOH result into 1 mole OH⁻ ions

Therefore,  Molarity  of OH⁻ = 0.04474 M

Now,

pOH = -log[OH⁻]

pOH = -log (0.04474) M

pOH = 1.35

Similarly,

pH + pOH = 14

pH = 14 - pOH

pH = 14 - 1.35

pH = 12.65

6 0
3 years ago
How many moles of K2SO4 are in 15.0 grams of K2SO4
uysha [10]
Molar mass K₂SO₄ = 174.259 g/mol

n =  \frac{m}{M}

n =  \frac{15.0 g}{174.259g/mol}

n = 0.0860 moles

hope this helps!
5 0
3 years ago
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What is the density of a gas at 242.5K and 0.7311atm. The molar mass of this gas is 70.90g/mol
Pie

Answer:

0.384g/l

Explanation: the density version of the ideal gas law is pm=drt

in which p= pressure, m=molar mass,d=, density, r= to a constant which is 0.08206, and t=temperature so just input the values

PM=DRT. so to find d the formula would be D=RT\PM

D=<u>0.08206*242.5</u>

        0.7311*70.90

D=0.384g/l

4 0
3 years ago
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