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4 years ago

Please answer

Chemistry

1 answer:

rewona [7]4 years ago

4 0

Answer: C. She should decrease the frequency of the wave

Explanation: this makes the waves shorter causing it to become louder the the human ear!

<h3>hope it helps</h3>

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Container A holds 717 mL of an ideal gas at 2.80 atm. Container B holds 174 mL of a different ideal gas at 4.30 atm. Container A

horsena [70]

Answer:

3.09 atm

Explanation:

Given that:

Volume of container A = 717 mL

Pressure of container A = 2.80 atm

Volume of container B = 174 mL

Pressure of container B = 4.30 atm

Now, if the valve are being removed and the gases are allowed to mix together; then

The total final pressure can be calculated by using the formula:

$P_f = \dfrac{P_AVA+P_BV_B}{V_A+V_B}$

$P_f = \dfrac{2.80*717+4.30*174}{717+174}$

$P_f = \dfrac{2007.6+748.2}{891}$

$P_f = \dfrac{2755.8}{891}$

$\mathbf{P_f =3.09 \ atm}$

4 0

3 years ago

Describe at least 10 things you did this week to be part of the solution. Describe the areas you see you need to improve in.

RSB [31]

So what did you do this week?

7 0

3 years ago

Why is grass green? Also why is the sky blue???

lara31 [8.8K]

Like many plants, most species of grass produce a bright pigment called chlorophyll. Chlorophyll absorbs blue light (high energy, short wavelengths) and red light (low energy, longer wavelengths) well, but mostly reflects green light, which accounts for your lawn's color.

sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colors because the blue light has been scattered out and away from the line of sight.

Hope this Helped!

5 0

3 years ago

Read 2 more answers

Consider the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq). Which ions are spectator ions? pls

Marta_Voda [28]

Potassium and Nitrate ions are spectator ions in the reaction:

$Pb(NO_3)_2(aq) + 2KI(aq)$ → $PbI_2(s) + 2KNO_3(aq).$

<h3>What are spectator ions?</h3>

Ions that are not involved in the actual chemical reaction are called spectator ions.

A precipitation reaction occurs when two ionic compounds react to produce a precipitate and an insoluble substance which stays in the solution as a spectator ion.

Hence, Potassium and Nitrate ions are spectator ions in the reaction:

$Pb(NO_3)_2(aq) + 2KI(aq)$ → $PbI_2(s) + 2KNO_3(aq).$

Learn more about the spectator ions here:

brainly.com/question/14050476

#SPJ1

6 0

2 years ago

If a compound has two atoms of aluminum (AI) and three atoms of oxygen (O) what would its chemical formula look like?

liberstina [14]

Answer:

Al₂O₃

Explanation:

that's the molecular formula for aluminum oxide/alumina.

3 0

3 years ago