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lys-0071 [83]
3 years ago
9

Aluminum can react with oxygen gas to produce aluminum oxide (Al¿OÀ). What type of reaction is this?

Chemistry
1 answer:
nadya68 [22]3 years ago
3 0
B.. it is a combination reaction... A + B--> AB
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What is the correct formula for dihydrogen monoxide?
MArishka [77]
It's the other name of Water and it's formula would be H2O
7 0
3 years ago
The density of ammonia gas under certain conditions is 0.625 g/l. calculate its density in g/cm3.
MatroZZZ [7]
From the conversion of units:
1 cm^3 is equivalent to 1 mL
1 L is equivalent to 1000 mL
therefore,
to convert from liter to cm^3, we simply multiply by 1000.
Note that the multiplication will be done in the denominator.

Based on this:
density = (0.625 g/l) x (1g/1000 cm^3) = <span> 0.000625 g/cm^3 
            = 6.25 x 10^-4 g/cm^3</span>
6 0
3 years ago
How is the mass number of an isotope expressed in the name of an atom?
Ksenya-84 [330]
The mass number of an isotope can be expressed <span>by simply writing the name of the element or symbol followed by a hyphen and the mass number.

Example:
Carbon-13, Carbon-14 
Oxygen-17
Uranium-235

</span>
6 0
3 years ago
Give the number of covalent bonds that a carbon atom can form.
polet [3.4K]

Answer:

four covalent bonds

Explanation:

A carbon atom would form 4 covalent bonds.

For a covalent bond to be formed, an atom would share its valence electrons with another. In this process, each atom would require unpaired electrons for this bond to be formed. The number of available unpaired electrons would represent the number of electrons needed to complete the outer energy level of the atom.

In a carbon atom, we have no lone pair of electrons and 4 unpaired electrons. When these 4 electrons are shared with those of other atoms, they produce a complete octet which perfectly mimics the noble gases.

3 0
3 years ago
Calculate the fractional saturation for hemoglobin when the partial pressure of oxygen is 58 mm Hg. Assume hemoglobin is 50% sat
svetlana [45]

Answer:

0.8988

Explanation:

To calculate the fractional saturation of hemoglobin , the formula used is

YO_2=\frac{(pO_2)^n}{(p50)^n+(pO_2)^n}

now putting the values

YO_2= \frac{58^3}{28^3+58^3}

= \frac{195112}{21952+195112}

=0.8988

Therefore, fractional saturation of hemoglobin= 0.8988

where

YO_2= fractional saturation of hemoglobin

pO_2= partial pressure of oxygen

p50= is the pO_2 at which hemoglobin is 50% saturated

4 0
3 years ago
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