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Jlenok [28]
3 years ago
15

Define molecular formula?​

Chemistry
1 answer:
Mademuasel [1]3 years ago
6 0

A molecular formula is an expression that states the number and type of atoms present in a molecule of a substance.

Example : H2O (water) There are 2 atoms of Hydrogen and 1 atom of Oxygen in this substance

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The density of human blood is 1.06g/ml the volume is 5.5l what is the mass in kg
kondor19780726 [428]

The mass of the blood is 5.8 kg.

<em>V</em> = 5.5 L = 5500 mL

Mass = 5500 mL × (1.06 g/1 mL) = 5800 g = 5.8 kg

6 0
3 years ago
Which is a physical property of milk?
RideAnS [48]

C, because Boiling doesnt change the substance, making it a Physical property

5 0
4 years ago
HELPPPP !!! oxygen calculation to find neutrons
Tcecarenko [31]

Answer:

Oxygen has 8 neutrons

Explanation:

We know that cause the atomic number says how many protons does the element has, so in this case is eight, and in the mass number, we have the number of protons+neutrons, in this case is 16. Then, as we know that oxygen has eight protons with the atomic number, we would do 16-8 protons= 8 neutrons.

Check: Atomic number is 16= 8 protons + 8 neutrons

6 0
3 years ago
5. A fireplace fire heating a room on a cold day is an example of what type of heat
Inessa [10]

Answer:

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Explanation:

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8 0
3 years ago
a student determined in the laboratory that the percent by mass of water in cus04 5h20 is 38.0% if the accepted value is 40% wha
IrinaVladis [17]
Percent error is [(abs(experimental - actual))/(actual)] * 100
(38.0 - 40.0 ) / 40.0 = 2.0 / 40 =  0.05 
0.05 * 100 = 5
since there are 2 sigfigs, the answer is 5.0 %

I made the 2 positive since the absolute value of 38.0 - 40.0 was taken
There are only 2 sigfigs because of the subtraction of 38.0 - 40.0 gives 2.0, only 2 sigfigs
4 0
4 years ago
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