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3 years ago

7

Calcium chloride has a melting point of 772°C, and water has a boiling point of 100°C. Which statement is true for calcium chlor

ide and water?

1 answer:

nekit [7.7K]3 years ago

4 0

The difference is due to the fact that calcium chloride has stronger intermolecular forces than water.

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atroni [7]

Answer:

(1) atomic numbers

Explanation:

The observed regularities in the properties of the elements on the periodic table are periodic functions of their atomic numbers.

Atomic number is the number of protons in an atom.
The periodic law states that "the properties of elements are a periodic function of their atomic number".
Elements on the periodic table are arranged based on the atomic numbers they contain.
The number of positively charged particles in an atom is the atomic number.

6 0

2 years ago

If I want to lower the volume (loudness) I can do which of the following. Select all that apply.

nirvana33 [79]

Sound travels in waves and the height of the wave is the loudness of the sound.

To decrease sound, you need to make the waves not so high, so you can

- decrease the amplitude

- decrease the height of the crest (lower the top of the wave down)

- increase the height of the trough (bring the bottom of the wave up)

It's all about getting the wave to be closer to the center, to not be so high and low, but to be flatter.

(picture taken from sound . eduation website)

6 0

2 years ago

A person tries to heat up her bath water by adding 5.0 l of water at 80c to 60 l of water at 30c. what is the final temperature

Sophie [7]

We can calculate the final temperature from this formula :

when Tf = (V1* T1) +(V2* T2) / (V1+ V2)

when V1 is the first volume of water = 5 L

and V2 is the second volume of water = 60 L

and T1 is the first temperature of water in Kelvin = 80 °C +273 = 353 K

and T2 is the second temperature of water in Kelvin = 30°C + 273= 303 K

and Tf is the final temperature of water in Kelvin

so, by substitution:

Tf = (5 L * 353 K ) + ( 60 L * 303 K) / ( 5 L + 60 L)

= 1765 + 18180 / 65 L

= 306 K
= 306 -273 = 33° C

8 0

2 years ago

A 25 Ω resistor has a voltage drop of 12 V across it. Calculate the current flowing through the resistor

Yanka [14]

Answer:

0.48

Explanation:

$i = \frac{v}{r}$

because we are looking for I which is current we say

I = 12÷25 which is 0.48.

4 0

2 years ago

Znco3 has a molar mass of 125.40 g/mol. which of the conversion factors shown below correctly expresses this relationship as wel

Airida [17]

Answer : $ZnCO_{3}$ will be 1 mole of $ZnCO_{3}$ / 125. 40 g of $ZnCO_{3}$

Explanation : The molar mass and the formula units are the same thing in any compound so when given a molar mass of compound then one mole of that compound is divided by its molar mass. Where one mole will be equal to avogadro's number which is 6.022 X $10^{23}$ .

4 0

3 years ago

Read 2 more answers