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gogolik [260]
3 years ago
6

Please help

Chemistry
2 answers:
lara [203]3 years ago
7 0

Explanation:

Ideal gas law states that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant.

Mathematically,      PV = nRT

where,   P = pressure

             V = volume

             n = number of moles

             R = gas constant

            T = absolute temperature

A gas behaves ideally at high temperature and low pressure because when pressure is low and temperature is high then there will be more number of collisions between the gas particles. As a result, kinetic energy of molecules will increase hence, molecule's size will become less significant as compared to the empty space between them.

Therefore, conditions for which the ideal gas law will be most accurate are as follows.

  • high temperatures
  • low pressures

kotegsom [21]3 years ago
4 0
High temp and low pressure
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In an electrical circuit, the presence of a resistor limits the current and prevents
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True I believe because when the current circuit is at its limit it will be damaged
6 0
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A chemical reaction involves reactant species A, B, and C. Leaving all other factors identical, doubling the concentration of sp
umka21 [38]

Answer:

Rate = k . [B]² . [C]

Explanation:

The dependence of the reaction rate on the concentration of the reactants is given by the reaction order of each one, as shown in the rate equation.

Rate=k.[A]^{x} .[B]^{y} .[C]^{z}

where,

k is the rate constant

x, y, z are the reaction orders.

  • <em>The rate of reaction is not affected by changing the concentration of species A.</em> This means that the reaction order for A is x = 0 since when its concentration changes, the rate stays the same.
  • <em>Leaving all other factors identical, doubling the concentration of species B increases the rate by a factor of 4.</em> This means that the reaction order for B is y = 2, so when the concentration is doubled, the new rate is 2² = 4 times the initial rate.
  • The rate of the reaction is linearly dependent on the concentration of C. This means that the reaction order for C is z = 1, that is, a linear dependence.

All in all, the rate equation is:

Rate = k . [B]² . [C]

3 0
3 years ago
For the circuit shown below, By using two method to find the value of R . if the supply voltage V= 12 V and the current in the c
Paul [167]

Answer:

R = 12 ohms

Explanation:

It is given that,

Supply voltage is 12 V

Current in the circuit is 1 A

We need to find the resistance of the circuit. Ohm's law gives the relationship between current, voltage and resistance as follows :

V = IR

R=\dfrac{V}{I}\\\\R=\dfrac{12}{1}\\\\R=12\ \Omega

So, the resistance of the circuit R is 12 ohms.

5 0
3 years ago
Find the density of a block with a length of 8.0 cm, a width of
seraphim [82]

Answer:

<h3>Density = 0.5 g/cm³</h3>

Explanation:

Density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

mass = 32g

To find the density we must first find the volume of the block

From the question the block is a cuboid

Volume of cuboid = length × width × height

length = 8 cm

width = 4 cm

height = 2 cm

Volume of block = 8 × 4 × 2 = 64 cm³

Substitute the values into the above formula and solve for the density

That's....

Density =  \frac{32}{64}  \\  =  \frac{1}{2}

We have the final answer as

Density = 0.5 g/cm³

The block will float because it's density is less than the density of water which is

1 g/cm³

Hope this helps you

6 0
3 years ago
Read 2 more answers
Can someone help me?
Oduvanchick [21]

Answer:

<u>an element with a large number of valence electrons and a large atomic radius</u>

Explanation:

Electronegativity means a tedency when an atom attracts bonding electrons in a covalent bond situation.

» If an atom has many valency electrons [ <em>empty</em><em> </em><em>orbitals</em><em> </em><em>i</em><em>n</em><em> </em><em>o</em><em>u</em><em>t</em><em>e</em><em>r</em><em>m</em><em>o</em><em>s</em><em>t</em><em> </em><em>s</em><em>h</em><em>e</em><em>l</em><em>l</em><em> </em>], it has difficulty in attracting electrons hence electronegativity low.

» If an atom is large, its nuclear attraction force of incoming electrons is low hence low electronegativity.

.

7 0
3 years ago
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