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makkiz [27]
3 years ago
10

How are two atoms of the same element alike?

Chemistry
1 answer:
AnnyKZ [126]3 years ago
5 0

Answer:

Explanation:

The nucleus of an atom contains neutrons and protons bonded tightly together. The same chemical element can have a different number of neutrons and still be the same element.

You might be interested in
Which net ionic equation would match this description of a chemical reaction: When a
krok68 [10]

Answer:

3Mg^{2+}(aq.)+2PO_{4}^{3-}(aq.)\rightarrow Mg_{3}(PO_{4})_{2}(s)

Explanation:

Mg(NO_{3})_{2}, Na_{3}PO_{4} are strong electrolytes. Hence they are fully ionized in aqueous solution.

Mg_{3}(PO_{4})_{2} is a sparingly soluble salt. Hence it remains undissociated in aqueous solution.

So, total ionic equation:

3Mg^{2+}(aq.)+6NO_{3}^{-}(aq.)+6Na^{+}(aq.)+2PO_{4}^{3-}(aq.)\rightarrow Mg_{3}(PO_{4})_{2}(s)+6Na^{+}(aq.)+6NO_{3}^{-}(aq.)

Net ionic equation is written by omitting spectator ions from total ionic equation.

Here, Na^{+} and NO_{3}^{-} ions are spectator ions as they remain present on both side of total ionic equation.

So, net ionic equation:

3Mg^{2+}(aq.)+2PO_{4}^{3-}(aq.)\rightarrow Mg_{3}(PO_{4})_{2}(s)

So, option (d) is correct.

6 0
3 years ago
What is the most significant chemical difference between triacylglycerols and glycerophospholipids that leads to their different
satela [25.4K]

Answer:

Triacylglycerols (triglycerides) are non-polar or hydrophobic molecules

Glycerophospholipids (phosphoglycerides) are polar or hydrophilic

Explanation:

Triacylglycerides (TGs) are esters synthesized by the esterification of three molecules of glycerol and fatty acid, and this is essentially by the replacement of the three hydroxyl groups on glycerol with three fatty acids. This removes the hydrophilic property from the glycerol molecule hence TGs are only soluble in non-polar solvents like alcohol and benzene, and TGs are therefore the storage forms of fats in adipose tissues.

Glycerophospholipids are formed by the addition of two hydrophobic fatty acid groups and one phosphoric acid (phosphate group) to glycerol (alcohol) leaving a hydrophilic head (phosphate end) and a hydrophobic tail (fatty acid ends). This amphipathic property of this molecule makes it a suitable molecule for membrane structures, especially of cells (lipid bi-layer), with an arrangement where the hydrophilic side interacts with the aqueous environment, while the hydrophobic side makes contact with the non-aqueous environment.

5 0
3 years ago
A. 207 kJ<br> B. 4730 kJ<br> C. 9460 kJ<br> D. 414 kJ
MrMuchimi

Answer:

Q = 9460 Kj

Explanation:

Given data:

Mass of copper = 2kg

Latent heat of vaporization = 4730 Kj/Kg

Energy required to vaporize 2kg copper = ?

Solution:

Equation

Q= mLvap

It is given that heat required to vaporize the one kilogram copper is 4730 Kj thus, for 2 kg

by putting values,

Q= 2kg ×  4730 Kj/Kg

Q = 9460 Kj

6 0
3 years ago
1. How many grams are in a dekagram?
Gennadij [26K]

Answer:

1 gram=0.1 decagram.

Formula:

Divide the mass value by 10

4 0
3 years ago
you are given an unknown liquid and asked to determine its identity. You can measure only one physical property. you decide to h
Yuki888 [10]

Answer:

b. boiling point

Explanation:

8 0
3 years ago
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