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3 years ago

Write a report on waves

Chemistry

1 answer:

Bad White [126]3 years ago

6 0

Answer:

The epic emotional journey of a suburban African American family as they navigate love, forgiveness and coming together in the wake of a tragic loss.

Explanation:

hope thsi helps if so please brainliest

Merry Christmas

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At 25°C, gas in a rigid cylinder with a movable piston has a volume of 145 mL and a pressure of 125 kPa. Then the gas is compres

natta225 [31]

Answer:

(4) 230 kPa

Explanation:

The temperature is constant, so the only variables are pressure and volume.

We can use Boyle’s Law.

$p_{1}V_{1} = p_{2}V_{2}$

Divide both sides of the equation by $V_{2}$ .

$p_{2} = p_{1} \times \frac{V_{1}}{ V_{2}}$

$p_{1} = \text{145 kPa}; V_{1} = \text{125 cm}^{3}}$

$p_{2} = ?; V_{2} = \text{80. cm}^{3}$

$p_{2} = \text{145 kPa} \times \frac{\text{125 cm}^{3}}{\text{80. cm}^{3}} = \textbf{230 kPa}$

7 0

3 years ago

What is the Lewis structure for NaCl

Ipatiy [6.2K]

Answer:

Na has 2 valence electrons where Cl has six.

The lewis structure would be Na and Cl side by side, but make 8 dots around the Cl atom. Two on the top, bottom and each side of the Chlorine atom.

7 0

3 years ago

Exactly 313.5 J will raise the temperature of 10.0 g of a metal from 25.0 C to 60.0 C. What is the specific heat of the metal?

torisob [31]

From the equation $Q = m\cdot c_e\cdot \Delta T$ we can clear specific heat:

$c_e = \frac{Q}{m\cdot \Delta T}\ \to\ c_e = \frac{313.5\ J}{10\ g\cdot (60 - 25)^\circ C} = \bf 0.896\frac{J}{g\cdot ^\circ C}$

4 0

3 years ago

Vinegar is a chemical used in cooking, cleaning and other common experiences. A 0.1 M solution of vinegar in water has a [H+] of

Ymorist [56]

Answer: a) pH of a 0.1 M vinegar solution is 2.9

b) It is an acid as pH is less than 7

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH equal to 7.

As vinegar is a weak acid, its dissociation is represented as;

$CH_3COOH\rightleftharpoons H^+CH-3COO^-$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= 0.1 M

$[H^+]=c\times \alpha$

$[H^+]=0.1\times \alpha$

$1.3\times 10^{-3}=0.1\times \alpha$

$\alpha=0.013$

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

$pH=-log[1.3\times 10^{-3}]=2.9$

Thus pH of a 0.1 M vinegar solution is 2.9

As pH is less than 7, it is an acid.

7 0

4 years ago

In general, sound travels faster through

mariarad [96]

To answer the question "What is amplitude?", first look at the context of the question. A poem is also given before the questions which discusses about sound waves. Therefore, considering the context above, amplitude is the height of the wave.

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3 years ago