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3 years ago

In a furnace zinc is a gas but lead is a liquid. Suggest why?

1 answer:

6 0

I believe it is because, Lead has a higher boiling point than zinc. by the time Lead melts and becomes a liquid, the temperature is way higher than the boiling point of Zinc therefore, Zinc becomes a gas.

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Which of these can be mined from earth and used as an energy source?

Nastasia [14]

coal

Which of these can be mined from earth and used as an energy source?

A.Get rid of the waste and extra fluid

B.Ureters

C.Coal

D.Bladder

ans is coal

4 0

2 years ago

Please help me with this!!?

Natali5045456 [20]

Answer:

The last answer is right they get half of the mothers genes and half of the fathers genes.

3 0

3 years ago

How to calculate work done with change in volume and pressure.

natali 33 [55]

$W = \displaystyle \int dW = \displaystyle \int^{V_2}_{V_1} p ~dV = p(V_2 - V_1) = p \Delta V$

3 0

2 years ago

Name the following covalent compound:

mote1985 [20]

Answer:

Pentasulfur nonanitride.

Explanation:

In order to name a compound properly, we need to identify the type of a compound we have. The given compound consists of two non-metals, sulfur and nitrogen. This implies that we have a covalent compound in contrast to an ionic compound which consists of a metal and a non-metal.

To name a molecular/covalent compound, we should use prefixes stating the number of atoms we have. In this case, we have 5 sulfur atoms. The prefix for 5 is 'penta'. That said, we have 'pentasulfur' as our beginning of the name.

We also have 9 nitrogen atoms. The second atom in the molecular formula would have an ending of '-ide', so we expect to have 'nitride'. Adding a prefix for 9, we'd have 'nonanitride'.

Putting everything together, the name is pentasulfur nonanitride.

Some common prefixes:

mono – one (we don't state mono for the first atom, e. g., we would name CO as carbon monoxide instead of monocarbon monoxide);

di – two;

tri – three;

tetra – four;

penta – five;

hexa – six;

hepta – seven;

octa – eight;

nona – nine;

deca – ten.

Notice that 'decanitride' would be correct in case you had 10 nitrogen atoms, similarly, tetra and hexa stand for 4 and 6 instead of 5 given sulfur atoms.

6 0

3 years ago

How to do dimensional analysis chemistry with moles?

almond37 [142]

Moles are a unit of measure used to convert between different quantities like grams, molarity or volume.

Dimensional analysis is doing math with units. They multiply, divide and cancel out just like numbers. This is why like for area of a rectangle: 2m × 3m = 6m² is in units of distance squared and volume is in units of distance cubed.

Example Chemistry question.
Now, say you have 10 grams of NaCl salt that is added to 1 L water and you want to know the concentration. You would look at the periodic table and find the atomic mass of both Sodium (Na = 23 g/mol) and Chloride (Cl = 35.5 g/mol).

Once you have the atomic mass of both elements add them together to get the atomic mass of the compound NaCl = 23 g/mol + 35.5 g/mol = 58.5 g/mol

set up the multiplication so that grams cancels out during multiplication. Like so ....
$10 g * \frac{1mol}{58.5g} = 0.17 mole..NaCl$

Grams cancel leaving moles NaCl. The concentration of the solution, molarity = moles/liter
Divide 0.17 moles NaCl by 1 Liters = 0.17 Molarity NaCl

Hope this helps, let me know if you have any questions.

3 0

3 years ago