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4 years ago

What city is the capital of nebraska

Chemistry

2 answers:

Aleks04 [339]4 years ago

5 0

Answer:

Lincoln

Explanation:

ITS CORRECT

xeze [42]4 years ago

5 0

Answer:

The city capital is Lincoln :)

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Please help on both I apologize for the horrible quality

NemiM [27]

Answer:

Explanation:

H₂SO₄:

Element (symbol) No of atoms in No of compounds Total atoms

1 molecule coefficient

H 2 1 2

S 1 1

O 4 4

2H₃PO₄:

Element (symbol) No of atoms in No of compounds Total atoms

1 molecule coefficient

H 3 2 6

P 1 2

O 4 8

There are two mole of H₃PO₄. One mole contain 3 hydrogen atom, 1 phosphorus atom and 4 oxygen atoms. Thus in two mole of compound 6 hydrogen atoms, 2 phosphorus atom and 8 oxygen atoms are present.

4 0

3 years ago

2.04 thermal and chemical change

bazaltina [42]

Explanation:

thermal changes are those in which heat exchange is involved like endothermic and exothermic

while in chemical changes collision between the reactant occurs which result into product

8 0

2 years ago

What’s the electron configuration of an N-3 ion

Alla [95]

Answer:

1s2 2s2 2p6

Explanation:

The nitride ion(N^3-) is formed when nitrogen gains three electrons. Nitrogen possesses seven electrons in its orbitals and ordinarily has the electronic configuration; 1s2 2s2 2p3. However,being in group 15, nitrogen can accept three electrons to form the nitride ion and complete its octet of electrons. When this happens, three electrons are added to the nitrogen atom and the electronic configuration is now the same as that of Neon, its closest noble gas which is 1s2 2s2 2p6. Hence the answer given above.

Elements can accept or donate electrons in order to complete their octet structure in accordance to the octet rule which states that atoms and ions must possess eight electrons in their outermost shell in order to attain chemical stability. The reason for ion formation and chemical reaction is in order for species to attain the octet structure.

8 0

3 years ago

Be sure to answer all parts. A person drinks four glasses of cold water (3.2 degree C) every day. The volume of each glass is 2.

Lelechka [254]

Explanation:

(a). The given data is as follows.

Volume of one glass of water = $2.2 \times 10^{2}$ ml = 220 ml

Volume of 4 glass of water = $220 \times 4$ = 880 ml

We known that density of water is 1 g/ml. Therefore, calculate the mass of water as follows.

Mass of water = $880 ml \times 1 g/ml$

= 880 gm

= 0.88 Kg (as 1 kg = 1000 g)

The relation between heat energy, mass and temperature change is as follows.

Q = $mC \Delta T$

$\Delta T = (37 - 3.2)^{o}C = 33.8^{o}C$

Putting the given values into the above formula as follows.

Q = $mC \Delta T$

= $0.88 \times 4.186 J/g^{o}C \times 33.8^{o}C$

= 124.5 kJ

Hence, the body have to supply 124.5 kJ to raise the temperature of the water to 37 degree C.

(b). As we know that the heat of fusion of ice is 333 J/g.

So, energy required for $8.4 \times 10^{2}$ g or 840 g is as follows.

$333 \times 840$ = 279.72 kJ

Heat capacity of water= 4.184 $J/g^{o}C$

Now, heat energy will be as follows.

Q = $4.184 \times 840 g \times 37^{o}C$

= 130.03 kJ

Therefore, total heat required = (279.72 + 130.03) kJ

= 409.75 kJ

Hence, for the given situation your body should lose 409.75 kJ of heat.

6 0

4 years ago

How can forgery be used in crime

Tems11 [23]

Some bad people will tend to forge dollar bills and make fake bills, giving them to cashiers and asking for it to be split into a different amount of bills so they are given real cash and wont be caught or they will buy things, return them and be given back real money and get away with it. This is obviously a crime because it's fake.

3 0

3 years ago

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