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koban [17]
2 years ago
9

plz, help me Lisa’s doctor tells her that she needs to eat more foods that contain calcium to maintain her bone health. What cou

ld happen if Lisa doesn’t follow her doctor’s orders?
Chemistry
1 answer:
andriy [413]2 years ago
6 0

Answer:

Deficiency of calcium which means that her body will take calcium from her bones which results in weakening of bones. (osteoporosis)

Explanation:

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What is the mass of a 2.5 mole sample of MgO2
MrRa [10]
Mass = no. of moles x molecular weight
m = n x Mr
m = 2.5 mol x (24 + [16 x 2])
m = 140g
6 0
2 years ago
An unknown substance has a melting point of -77°C. Is this substance likely to be an ionic compound?
pentagon [3]

Answer:

No. it,s not possible.

Explanation:

Because you know that ionic compound is having large inter-molecular forces. -77C* is for a compound having v.very small inter-molecular forces.you must know that M.B is directly varing with inter-molecular forces.

8 0
2 years ago
A neutral atom of Cobalt (Co) has an atomic number of 27 and an atomic mass of 59. Therefore, Co has _________________________
stepladder [879]

Answer:

A neutral atom of Cobalt (Co) has an atomic number of 27 and an atomic mass of 59. Therefore, Co has 27 electrons, 27 protons and 32 neutrons.

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

The atomic number Co is 27 it means it has 27 protons and 27 electrons.

The mass number is sum of protons and neutrons, thus number of neutrons are

59 - 27 = 32 neutrons

3 0
3 years ago
The image shows two different species. the image is a dog and a lizered
Serga [27]

Answer:

the tail

Explanation:

3 0
3 years ago
An atom's nucleus contains three protons and three neutrons. What is the overall charge of the nucleus?
lana66690 [7]

Answer:

d

Explanation:

3 0
3 years ago
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