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3 years ago

HELLP: WHAT IS THE 10 ORGANIZATIONS OF MATTER??? WILL GIVE BRAINLEST

Chemistry

1 answer:

NARA [144]3 years ago

3 0

molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

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If 4.00 g of NaCl react with 10.00 g of AgNO3, what is the excess reactant?

Mekhanik [1.2K]

The reaction formula of this is NaCl + AgNO3 = NaNO3 + AgCl. The mole number of NaCl is 4/58.5=0.068 mol. The mole number of AgNO3 is 10/170=0.059 mol. So the NaCl is excess.

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3 years ago

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A scientist fills a large, tightly sealed balloon with 75,000 mL of helium at STP.

pav-90 [236]

Considering the definition of STP conditions, 3.35 moles of helium are contained within the balloon.

<h3>Definition of STP condition</h3>

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

<h3>Amount of moles of helium within the balloon</h3>

In this case, you know that scientist fills a large, tightly sealed balloon with 75,000 mL of helium at STP.

So, you can apply the following rule of three: if by definition of STP conditions 22.4 liters are occupied by 1 mole of helium, 75 L (75 L= 75000 mL, being 1 L= 1000 L) are occupied by how many moles of helium?

$amount of moles of helium=\frac{75 Lx1 mole}{22.4 L}$

<u><em>amount of moles of helium= 3.35 moles</em></u>

Finally, 3.35 moles of helium are contained within the balloon.

Learn more about STP conditions:

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2 years ago

Lie on a bed?<br> What type of force are you exerting when you

Alexxx [7]

Static force is being exerted

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2 years ago

4. A sample of gas has a pressure of 700 mmHg and 30.0°C. Ar what temperature would the pressure be 600 mmHg if the volume remai

shtirl [24]

Answer:

T₂ = 259.84 K

T₂ = -13.31 °C

Explanation:

Given data:

Initial pressure = 700 mmHg

Initial temperature = 30.0°C (30+273.15 K = 303.15 K)

Final temperature = ?

Final pressure = 600 mmHg

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

700 mmHg /303.15 K = 600 mmHg / T₂

T₂ = 600 mmHg × 303.15 K / 700 mmHg

T₂ =181890 mmHg.K /700 mmHg

T₂ = 259.84 K

Temperature in celsius

259.84 K - 273.15 = -13.31 °C

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3 years ago

A 4-inch, f/5 telescope has a 1-inch eyepiece focal. Its magnifying power is:

Gre4nikov [31]

Its magnifying power is: 4X 5X 9X 20X. A 4-inch, f/5 telescope has a 1-inch eyepiece focal. Its magnifying power is 9x. This answer has been confirmed as correct and helpful.

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