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nadezda [96]
3 years ago
7

What part of the atom contains the protons and neutrons?

Chemistry
2 answers:
SIZIF [17.4K]3 years ago
7 0
The Nucleus of an atom contains protons and neutrons
IgorLugansk [536]3 years ago
3 0
Answer: the nucleus
hope this helps :)
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Name 2 separate technique in separating iodine crystal and iron filings​
KonstantinChe [14]

One is through sublimation, where the mixture is heated and iodine gets converted into gaseous form, leaving behind the iron fillings.

The other is to get a magnet near the mixture and all the iron fillings get attracted to it while iodine will be left over

5 0
3 years ago
If a gas sample has a pressure of 30.7 kPa at 0.00*C, by how much does the temperature have to decrease to lower the pressure to
Scrat [10]

Answer:

                      252.68 K  or   -20.46 °C

Explanation:

                    According to Gay-Lussac's Law, "Pressure and Temperature at given volume are directly proportional to each other".

Mathematically,

                                              P₁ / T₁  =  P₂ / T₂   ---- (1)

Data Given:

                  P₁  =  30.7 kPa

                  T₁  =  0.00 °C  =  273.15 K

                  P₂  =  28.4 kPa

                  T₂  =  <u>???</u>

Solving equation for T₂,

                  T₂  =  P₂ T₁ / P₁

Putting values,

                  T₂  =  28.4 kPa × 273.15 K / 30.7 kPa

                  T₂  =  252.68 K  or   -20.46 °C

8 0
3 years ago
How is the molar mass of a molecule determined? What are its units?
Molodets [167]

Answer:

Explanation:

molar mass=valency of the element*atomic number

its unit is amu

4 0
2 years ago
Select the options that are properties of electromagnetic waves:
kaheart [24]

Answer:

They propagate in materialistic media and non-materialistic media ( space ) .

They propagate in the space at constant velocity , which is 3 × 108 m/s .

They consist of vibrating electric and magnetic fields at certain frequency in phase with each other , perpendicular to each other and perpendicular to the direction of the wave propagation ...

Explanation:

welcome!

4 0
3 years ago
Plz help!!! Will give brainsiest!!!!
Olenka [21]
H2SO4+2KOH->K2SO4+2H2O
3 0
3 years ago
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