3 years ago

What type of front is depicted here? (60 Points)

Chemistry

2 answers:

Arisa [49]3 years ago

5 0

Answer:

Warm is the correct answer

Explanation:

tresset_1 [31]3 years ago

3 0

Answer:

warm

Explanation:

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Water freezes at____.

Aleks04 [339]

0 C
32 F
Water freezes

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3 years ago

A chemist must prepare 300.0mL of nitric acid solution with a pH of 0.70 at 25°C. He will do this in three steps: Fill a 300.0mL

d1i1m1o1n [39]

Answer: The volume of concentrated solution required is 9.95 mL

Explanation:

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$

We are given:

pH = 0.70

Putting values in above equation, we get:

$0.70=-\log[H^+]$

$[H^+]=10^{-0.70}=0.199M$

1 mole of nitric acid produces 1 mole of hydrogen ions and 1 mole of nitrate ions.

Molarity of nitric acid = 0.199 M

To calculate the volume of the concentrated solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the concentrated nitric acid solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted nitric acid solution

We are given:

$M_1=7.0M\\V_1=?mL\\M_2=0.199M\\V_2=350mL$

Putting values in above equation, we get:

$7.0\times V_1=0.199\times 350.0\\\\V_1=\frac{0.199\times 350}{7.0}=9.95mL$

Hence, the volume of concentrated solution required is 9.95 mL

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The chemical bonding in sodium phosphate, Na3PO4, is classified as:

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Ionic bonding between sodium and phosphate ions.

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All of the following are true of bases except

Oksana_A [137]

All of these are correct except the first option, as Arrhenius bases increase the concentration of hydroxide ions.

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A sound wave has a wavelength of 0.7 miles and a frequency of 500 Hertz what is the speed

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speed equals wavelength times frequency so

.7 x 500 = 350

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