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2 years ago

Sa se calculeze presiunea exercitata de 2 moli de h2 într un vas cu vol de 10l la temperatura de 27gc

Chemistry

1 answer:

Shtirlitz [24]2 years ago

8 0

Answer:

How do you find pressure given moles volume and temperature?

Therefore, to convert the moles of gas to pressure, the scientist must know the volume and temperature of the gas, in addition to the number of moles of gas. The pressure is then given by P = nRT / V.

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Biacetyl, the flavoring that makes margarine taste "just like butter," is extremely stable at room temperature, but at 200°C it

Sholpan [36]

Answer:

3.91 minutes

Explanation:

Given that:

Biacetyl breakdown with a half life of 9.0 min after undergoing first-order reaction;

As we known that the half-life for first order is:

$t__{1/2}}= \frac{0.693}{k}$

where;

k = constant

The formula can be re-written as:

$k = \frac{0.693}{t__{1/2}}$

$k = \frac{0.693}{9.0 min}$

$k = 0.077 min^{-1}$

Let the initial amount of butter flavor in the food be $(N_0)$ = 100%

Also, the amount of butter flavor retained at 200°C $(N_t)$ = 74%

The rate constant $k = 0.077 min^{-1}$

To determine how long can the food be heated at this temperature and retain 74% of its buttery flavor; we use the formula:

$\frac{N_t}{N_0}= -kt$

$t = - (\frac{1}{k}*In\frac{N_t}{N_0} )$

Substituting our values; we have:

$t = - (\frac{1}{0.077}*In\frac{74}{100} )$

t = 3.91 minutes

∵ The time needed for the food to be heated at this temperature and retain 74% of its buttery flavor is 3.91 minutes

4 0

2 years ago

How many more atomic orbitals does a d sublevel hold than a p sublevel? 2 4 6 8

irakobra [83]

It can hold 4 minutes more electrons.

8 0

2 years ago

PLS HELP NOW WILL GIVE BRAINLIEST

zvonat [6]

Answer:

Liquids, because they flow, can occupy whatever shape their container has, so they do not have a fixed shape. Because the particles in liquids are very close together (barely further apart than in solids) liquids do not easily compress, so their volume is fixed. hope that helps love!

7 0

2 years ago

A solid is 5 cm tall, 3 am wide, and 2 cm thick. It has a mass of 135 g. What is the solid's density?

gizmo_the_mogwai [7]

Answer:

density of solid = 4.5 g/cm³

Explanation:

density = mass ÷ volume

• We know the mass of the object (135 g). We need to calculate the volume:

Volume = length × width × thickness

= 5 cm × 3 cm × 2 cm

= 30 cm³

• Now we can calculate the solid's density:

density = 135 g ÷ 30 cm³

= 4.5 g/cm³

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1 year ago

What is one example of a scientific model? (this is science I don't know why can't find it on "pick a subject" so yeah)

Len [333]

Answer:

Explanation:

I’ll try helping

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2 years ago

Read 2 more answers