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Citrus2011 [14]
4 years ago
10

I need help with this before 11:15 please.

Chemistry
1 answer:
larisa86 [58]4 years ago
6 0

For 1 it is balanced for both Net Horizontal force and net vertical force.

For 2 Vertical is balanced and horizontal is unbalanced.

For 3 vertical is not horizontal is.

For 5 both are balanced.

for 6 vertical is, horizontal is not.

for 7 vertical is horizontal is not.

for 8 neither are balanced.

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If the wavelength of one wave is 0.25 or ¼ meters, how many waves will be formed in one meter?
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4 waves will be formed.
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A 975 L balloon contains helium. On the ground the temperature is 30 0C and the pressure is 743 torr. What will be the balloon's
Archy [21]

Answer:

V₂ = 1518L

Explanation:

-Using combined gas law:

\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}

<em>Where P is pressure, V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.</em>

<em />

<em>Initial states:</em>

P₁ = 743 torr

V₁ = 975L

T₁ = 30°C + 273.15K = 303.15K

P₂ = 375 mmHg = torr

V₂ = Our incognite

T₂ = -35°C + 273.15K = 238.15K

Replacing:

\frac{743torr*975L}{303.15K} =\frac{375torrV_2}{238.15K}

<h3>V₂ = 1518L</h3>
6 0
3 years ago
Assignment
kifflom [539]

Answer:

What

Explanation:

Can u e

6 0
3 years ago
Sodium hydroxide is available commercially as a 50.0% by weight aqueous solution. The density of the solution is 1.53 g/mL. Calc
bulgar [2K]

Answer:

[NaOH] = 19.1 M

Last option.

Explanation:

Sodium hydroxide is available commercially as a 50.0% by weight aqueous solution.

50% by weight means, that in 100 g of solution we have 50 grams of solute.

Molar mass of solute: 40 g/m

Mass / Molar mass = moles

50 g / 40 g/m = 1.25 moles

These are the moles of solute in 100 grams of solution, so we must use density data, so we can find out our volume.

Solution density = Solution mass / Solution volume

1.53 g/mL = 100 g / Solution volume

Solution volume = 100 g / 1.53 g/mL

Solution volume = 65.3 mL

1.25 moles of solute are in 65.3 mL of solution

Molarity = moles /L

Let's convert 65.3 mL in L

65.3 / 1000 = 0.0653 L

1.25 moles /0.0653 L = 19.1 M

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4 years ago
How many moles of SO3 are in 2.4x10^24 molesculea of SO3
yawa3891 [41]

there are 4.0 moles of SO3

5 0
3 years ago
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