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3 years ago

EMERGENCY HELP DUE IN 10 MIN!! I WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST JUST PLS HELP!!

Chemistry

2 answers:

Airida [17]3 years ago

6 0

If the object has a lower density than the fluid it is in, it will float.

So for the wood one, water has a density of 1g/cm so the wood would float.

For the second one the vegetable oil has the lowest density since it’s at the top

Butoxors [25]3 years ago

3 0

Answer:

1 float

2 vegetable oil

Explanation:

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What is the volume of 60 g of ether if the density of ether is 70 g/mL

NNADVOKAT [17]

V = 60.0 g/ 0.70 g/mL = 85.7 mL Hope this helps! ;D

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3 years ago

The molar solubility of C a ( O H ) 2 C a ( O H ) 2 was experimentally determined to be 0.019 M. Based on this value, what is th

Anuta_ua [19.1K]

Answer:

Ksp = 2.74 x 10⁻⁵

Explanation:

The solubility equilibrium for Ca(OH)₂ is the following:

Ca(OH)₂(s) ⇄ Ca²⁺(aq) + 2 OH⁻(aq)

I 0 0

C + s + 2s

E s 2s

According to the ICE table, the expression for the solubility product constant (Kps) is:

Ksp = [Ca²⁺] x ([OH⁻])² = s x (2s)² = 4s³

Then, we calculate Ksp from the solubility value (s):

s = 0.019 M

⇒ Ksp = 4s³ = 4 x (0.019)³ = 2.74 x 10⁻⁵

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2 years ago

Atoms and the chemical bonds that connect them cannot be observed with your eyes, so it is necessary to use a

Lera25 [3.4K]

Answer: d. both (b) and (c)

Explanation:

Atoms are too small to be seen on microscopes, so we model them based on theories.

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1 year ago

Read 2 more answers

You remove the pot of boiling hot water and set it on a cooler part of the stove. which mechanism is responsible for cooling the

kolbaska11 [484]

<span>All of the mechanisms work together to cool the pot of boiling water. </span>Hope this helps!

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3 years ago

Silver was precipitated and collected by filtration. The experiment yielded .077g of silver after dying. The predicted yield was

PSYCHO15rus [73]

Answer:

Precentage error = 7.23%

Explanation:

The precentage error formula is the useful method for determining precision of your experimental result

It can be calculated using :

$percent\ error = |\frac{experimental\ value-predicted\ value} {predicted\ value}|\times 100$

$percent\ error = |\frac{0.077\ -0.083} {0.083}|\times 100$

So we get percentage error = 7.23%

Precision means how close the experimental value to the true value or theoretical value

If percentage error is large it means experimental results are deviated and there is need to check mistakes,imprecision in the experiment

If the percentage error is zero it means the experiment is perfectly done without inaccuracy

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2 years ago