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Juliette [100K]
3 years ago
10

The liquid and solid state exist because of:

Chemistry
1 answer:
Verdich [7]3 years ago
5 0

Answer: Its B

Explanation:

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Something that can be broken down by living organisms is
Aloiza [94]
The answer is A: biodegradable.
5 0
3 years ago
If an object has an acceleration of 9.8 m/s and a force of 58.8N what is the mass of an object ? What could the object be
Makovka662 [10]

Answer:

The mass of an object  is 0.6122 Kg

Explanation:

Given:

Acceleration  = 9.8 m/s

Force  = 58.8 N

To Find:

Mass of an object = ?

Solution:

We know that according to newtons 2nd law

Force is the product of the mass and acceleration

F= ma

where

F = Force

m = mass

a =  Acceleration

Substituting the values,

58.8 = m X  9.8

m= \frac{58.8}{9.8}

m = 0.6122 kg

7 0
3 years ago
_____ were common ocean scavengers long ago, and they are frequently found in fossilized form.
quester [9]

Answer:

a. trilobites.

Explanation:

6 0
4 years ago
Determine the resulting pH when 12mL if 0.16M HCl are reacted with 32 mL if 0.24M KOH.
TEA [102]

Answer:

pH = 13.1

Explanation:

Hello there!

In this case, according to the given information, we can set up the following equation:

HCl+KOH\rightarrow KCl+H_2O

Thus, since there is 1:1 mole ratio of HCl to KOH, we can find the reacting moles as follows:

n_{HCl}=0.012L*0.16mol/L=0.00192mol\\\\n_{KOH}=0.032L*0.24mol/L=0.00768mol

Thus, since there are less moles of HCl, we calculate the remaining moles of KOH as follows:

n_{KOH}=0.00768mol-0.00192mol=0.00576mol

And the resulting concentration of KOH and OH ions as this is a strong base:

[KOH]=[OH^-]=\frac{0.00576mol}{0.012L+0.032L}=0.131M

And the resulting pH is:

pH=14+log(0.131)\\\\pH=13.1

Regards!

3 0
3 years ago
You are asked to determine the thermometer correction for your assigned melting point apparatus. You obtain a pure sample of ben
jonny [76]

Answer:

Question 1: -7.3ºC

Question 2: 67.50%

Explanation:

Question 1:

For different reasons a thermometer can not give the exact temperature that it is measuring, such as incorrect calibration. So the thermometer will have an error, and for this, we can have a thermometer correction, doing experiments with a substance that we know the temperature. In this question that substance was benzoic acid.

The thermometer correction (Tc) is the temperature that was measured less the real temperature, so:

Tc = 115.1 - 122.4 = -7.3ºC

It means that the temperature given by the thermometer is 7.3ºC less than the real.

Question 2:

Recrystallization is the process of transforming the liquid in its solid form (crystals). So, the sample of 4.00 grams of benzoic acid, there'll be water or other impurities. The total benzoic acid given was 2.70 grams, so its percentage will be:

(mass of acid/ total mass)x100%

(2.70/4.00)x100% = 67.50%

3 0
3 years ago
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