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larisa86 [58]
2 years ago
8

The average temperature of healthy person is 98.6°F. What is it in Celsius scale?

Chemistry
1 answer:
meriva2 years ago
3 0

Answer:

37 Degrees Celsius

Explanation:

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Which element has 32 protons in its nucleus
77julia77 [94]
That is the element Germanium  Atomic weight = 72.64
4 0
3 years ago
Read 2 more answers
How many grams are 2.50 * 10^23 molecules of CaO?
jolli1 [7]

134.56 grams are 2.50 * 10^23 molecules of CaO.

Explanation:

According to Avagadro hypothesis, 1 mole of a substance contain 6.023 x 10^23 molecules or particles.

Data given:

Number of molecules of CaO =

FORMULA USED IN CALCULATION:

number of molecules = 6.02 x 10^23 x number of moles of CaO

At first number of moles is calculated:

\frac{6.02 x 10^23}{2.50 X 10^23}

= 2.4 moles of CaO is present

to calculate the mass of CaO in grams formula used is

mass = atomic mass x number of moles

atomic mass of CaO = 56.07 grams/mole

mass = 2.4 x 56.07

          = 134.56 grams of calcium oxide is present is 2.50 * 10^23 molecules of CaO.

5 0
3 years ago
If 498 mol of octane combusts, what volume of carbon dioxide is produced at 23.0 °c and 0.995 atm?
MAXImum [283]
Octane on combustion yields CO₂ and H₂O;

                         2C₈H₁₈<span>  +  2 5O</span>₂    →    16 CO₂<span>  +  18 H</span>₂<span>O
</span>
According to equation,

                      2 moles Octane produces  =  16 moles of CO₂ 
So,
              498 moles Octane will produce  =  X moles of CO₂

Solving for X,
                                     X  =  (498 mol × 16 mol) ÷ 2 mol

                                     X  =  3984 moles of CO₂

Now,
Calculating for Volume,
As,
                                    P V  =  n R T
Solving for V,
                                        V  =  n R T / P       ------- (1)

Pressure  =  P  =  0.995 atm 
<span>Volume  =  V  =  ? </span>
<span>Moles  =  n  =  3984 </span>
<span>Gas Constant  =  R  =  0.0821 L.atm.K</span>⁻¹.<span>mol</span>⁻¹<span> </span>
<span>Temperature  =  T  =  23 + 273 = 296 K
</span>
Putting values in eq. 1

                V  =  (3984 mol × 0.0821 L.atm.mol⁻¹.K⁻¹ × 296 K) ÷ 0.995 atm

                                      Volume  =  973040.95 L
5 0
3 years ago
 how are subscripts determine the formula of ionic and covalent compounds ?
RideAnS [48]

Answer:

To determine the correct subscripts in a chemical formula, you have to solve how many atoms you need to balance the charge.

For example if I had the compound Calcium Fluoride I would look at the periodic table and see that Calcium's ionic formula is

Ca2+

. How do I know this? Well all elements want to have 8 valance electrons so they can be stable(happy). Seeing that Calcium has 2 valance electrons it is going to give away 2 electrons because that is easier than gaining 6 to be happy. Since Calcium has given away 2 electrons it has two more protons than electrons. We know that Protons have a Positive charge, Electrons have Negative charge, and the number of electrons is equal to the atomic number of an element in its pure non-ionic state. (Meaning it doesn't have a positive or negative charge; it is balanced.)

So if calcium gave away two electrons, it will have two more protons than an electron giving it a (2+) charge. The same process can be applied to Fluoride. Since fluoride is one to the left of the noble gases(group 18 or 8A) on the periodic table we know that it has 7 valance electrons because it is in group 7A or 17.

Knowing that we have 7 electrons the fluoride atom will gain an extra electron. Since the fluoride atom gained an extra electron it will have one more negative charge than a positive making it a ^(−)ion.

So you know that Calcium has a 2+ charge and that fluoride has a 1- charge, you then need these ions to balance out. So you need two fluorine atoms with a 1- ions to balance out the 2+ ion of calcium. Your final answer would be

CaF2

because you need two fluorine atoms to balance out the 2+ charge of the calcium.

Final Tip: Determine the charges then inverse the charges, remove the positive and negative superscipts, and write the charge numbers as a sub script. Ie. Calcium Fluoride

Ca2+ and F−

inversing and removing the charge signs would give you

4 0
3 years ago
What is sodium bicarbonate an example of? a buffer an acid a liquid a base
ludmilkaskok [199]

Answer:

base

Explanation:

carbonic acid - H2CO3 - is a weak acid. Therefore, HCO3 itself is its conjugate base. The Na(sodium) ion is neutral.

This means that NaHCO3 is a base. (a weak one)

3 0
3 years ago
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