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guajiro [1.7K]
3 years ago
10

An atom is always an element . but an element is not always an atom. but an element can also be a compound . an example is which

is an element and an atom while is an element and a molecule. a molecule is always made up of non-metals which are found to the right of the stairs on the ptoe. a molecule is always than one . but may be made up of or more the same elements or two or more elements. a molecule such as or are examples of molecules . molecules are always covalent bonds which are made up of . a compound is always than elements and must be made up of two types of elements. an example of a compound that is made of of non-metals is which can also be called a because it has more than one type of . an example of a compound that contains a metal is which is called a compound. formula units are always ionic bonds which means that they contain a . the difference between an atom and a molecule is the of elements in the formula. the difference between an element and a compound/formula is the of elements in the formula.
Chemistry
1 answer:
ivanzaharov [21]3 years ago
6 0
Non-metals is which can also be called a because it has more than one type of . an example of a compound
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Which data are shown on topographic maps?
eimsori [14]

Answer:

Topographic maps generally shows Natural features such as Rivers and Lakes.

sometimes they also show some features made by humans like brodges, elevations etc.

4 0
2 years ago
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The reaction 2 NO(g) ⇌ N2(g) + O2(g) has a Kc value of 2400 at 2000 K. If 0.850 M each of N2 and O2 are initially present in a 3
Nadusha1986 [10]

Answer:

[N2] = [O2] = 0.841M

And [NO] = 0.00172M

Explanation:

The equilibrium constant of this reaction, Kc, is:

Kc = 2400 = [N2] [O2] / [NO]²

<em>Where [] are the equilibrium concentration of each specie.</em>

<em />

The initial concentration of [N2] = [O2] = 0.850M. The equilibrium will shift to the left in order to produce NO. The equilibrium concentrations are:

[N2] = [O2] = 0.850M - X

And [NO] = 2X

Replacing:

2400 = [0.850-X]²  / [2X]²

9600X² = 0.7225 - 1.7 X + X²

0 = 0.7225 - 1.7 X - 9599X²

Solving for X:

X = -0.0088M. False solution, there is no negative concentrations.

X = 0.00859M. Right solution.

Replacing:

[N2] = [O2] = 0.850M - 0.00859M

And [NO] = 2*0.00859M

[N2] = [O2] = 0.841M

And [NO] = 0.00172M

3 0
3 years ago
25 L of a gas is collected at 115 kPa. If the pressure increases to 300 kPa, what is the new volume?
Lina20 [59]

Answer:

V2 = 9.58 Litres.

Explanation:

Given the following data;

Initial volume = 25 L

Initial pressure = 115 kPa

Final pressure = 300 kPa

To find the new volume V2, we would use Boyles' law.

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

PV = K

P_{1}V_{1} = P_{2}V_{2}

Substituting into the equation, we have;

115 * 25 = 300*V_{2}

2875 = 300*V_{2}

V_{2} = \frac {2875}{300}

V_{2} = 9.58

V2 = 9.58 L

Therefore, the new volume is 9.58 litres.

5 0
3 years ago
In a 1.2mM aqueous solution of butanoic acid C3H7CO2H, what is the percentage of butanoic acid that is dissociated? You can find
Alik [6]

Answer:

11% is the percentage of butanoic acid that is dissociated.

Explanation:

HBu\rightleftharpoons H^++Bu^-

Initially

c        0         0

At equilibrium

(c-cα)   cα     cα

Concentration of acid = c = [HBu] = 1.2 mM = 0.0012 M

Dissociation constant of butanoic acid = K_a=1.51\times 10^{-5}

Degree of dissociation =\alpha

Dissociation constant of an acid is given by:

K_a=\frac{[Bu^-][H^+]}{[HBu]}

1.51\times 10^{-5}=\frac{(c\alpha )^2\times x}{(c -c\alpha )}

1.51\times 10^{-5}=\frac{c(\alpha )^2\times x}{(1-\alpha )}

1.51\times 10^{-5}=\frac{0.0012 M\time (\alpha )^2}{(1-\alpha )}

\alpha = 0.1060\approx 0.11 =11\%

11% is the percentage of butanoic acid that is dissociated.

4 0
3 years ago
What physical property of matter determines the earth ?
nikdorinn [45]

Answer:

Density is a physical property that is determined by dividing the mass of a given amount of a substance by its volume.

Explanation:

4 0
3 years ago
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