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3 years ago

In a physical change the make up of matter is changed. O True O False

Chemistry

1 answer:

n200080 [17]3 years ago

6 0

Answer:

yes it is true

Explanation:

evaporation occurs when burning liquid water changes into gas.

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As I sipped my diet coke, I stared at the ice cubes in my drink. My mind wandered.

Sauron [17]

Answer:

24.3

Explanation:

I used a calculator and did 3x3x3=27 27x0.90=24.3

7 0

3 years ago

(“What is the effect of temperature on the solubility of a solid in a liquid?”)

mario62 [17]

The solubility increases

6 0

3 years ago

Read 2 more answers

Calculate the molality of each of the following solutions: (a) 36.2 g of sucrose (C12H22O11) in 323 g of water, m (b) 8.63 moles

Dmitriy789 [7]

Answer:

(a) m = 0.327 m.

(b) m = 4.57 m.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve this problem by firstly considering the fact that the molality is computed by dividing the moles of solute by the kilograms of solvent, in this case water; in such a way, we proceed as follows:

(a) We firstly calculate the moles of 36.2 grams of sucrose as its molar mass is 342.3 g/mol:

$\frac{36.2g}{342.3g/mol} =0.106mol$

Next, the kilograms of water in this case are 0.323 kg so that the molality will be:

$m=\frac{0.106mol}{0.323kg}\\\\m=0.327m$

(b) In this case, we directly realize that the kilograms of water are now 1.889 kg so that the molality will be:

$m=\frac{8.63mol}{1.889kg}=4.57m$

Clearly, the both of them in molal, m, units.

Regards!

6 0

2 years ago

How many molecules of glucose are in 1.15 mol of glucose, C6H1206?

Akimi4 [234]

Answer: There are $6.926\times 10^{23}$ molecules of glucose.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the molecules, we use the equation:

$\text{Number of moles}=\frac{\text{Given molecules}}{\text {Avogadro's number}}$

$1.15=\frac{x}{6.023\times 10^{23}}$

$x=1.15\times 6.023\times 10^{23}=6.926\times 10^{23}$

Thus there are $6.926\times 10^{23}$ molecules of glucose.

8 0

2 years ago

Which element has a higher ionization energy than silicon? Magnesium, Germanium, Sodium, or Phosphorus

Fiesta28 [93]

Answer:

Phosphorus

Explanation:

Phosphorus will have higher ionization energy than silicon from the given choices.

Ionization energy is the energy required to remove the most loosely held electron in an atom.

Based on the periodic trends:

Across the period, ionization energy increases from left to right
Down a group, ionization energy decreases.

Since phosphorus is the element in the right most part after silicon, it has higher ionization energy

7 0

2 years ago