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motikmotik
2 years ago
6

Sjwjdbehdhenwhdbrjxbejsnejfbejdnfbrjrnd

Chemistry
2 answers:
Mrrafil [7]2 years ago
7 0
Wow. Great question.
Keith_Richards [23]2 years ago
6 0

Answegood

Explanation:this answer is two it has letters

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Scientists gather information to understand why and where earthquakes happen. What is the name of the machine that helps them me
creativ13 [48]
There are two scales, one is a Ritcher scale and another one is called a Mercalli scale.
6 0
3 years ago
What is the chemical formula for Sodium bicarbonate
Cloud [144]

Answer: Na2CO3

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5 0
2 years ago
Francium is an extremely rare alkali metal, many of whose physical properties
bazaltina [42]

Answer:

136 neutrons

87 protons

Explanation:

A neutral atom have equal number of protons and neutrons. 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 number of protons or number of electrons are the atomic number of an atom while the number of protons and number of neutrons are the mass number of an atom. Every atom consist of nucleus or a positive center. The protons and neutrons are present with in the nucleus while electrons are present out side the nucleus. All these three subatomic particles construct an atom.

Example:

In Francium the number of proton and neutron can be found by subtracting the atomic number of francium from its atomic mass. The atomic number will be the number of protons and remaining will show the total number of neutrons present in  nucleus.

Atomic number is 87

Atomic mass 223

223- 87 = 136

So number of neutrons are 136 and number of protons are 87.

6 0
3 years ago
Which equation represents an addition reaction?
brilliants [131]

Answer:

Reactions in which a multiple bond between two atoms becomes partly or fully saturated by covalent attachments... A typical addition reaction may be illustrated by the hydrochlorination of propene (an alkene), for which the equation is CH3CH = CH2 + HCl → CH3C+HCH3 + Cl− → CH3CHClCH3.

Explanation:

thank me later

4 0
3 years ago
Consider 4.60 L of a gas at 365 mmHg and 20 C . If the container is compressed to 2.60 L and the temperature is increased to 36
BaLLatris [955]

Explanation:

The given data is as follows.

       V_{1} = 4.60 L,        P_{1} = 365 mm Hg

       V_{2} = 2.60 L,       P_{2} = ?

       T_{1} = (20 + 273) K = 293 K,      T_{2} = (36 + 273) K = 309 K

Since, number of moles of gas are equal so, according to ideal gas equation:

          \frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}

          \frac{365 mm Hg \times 4.60 L}{293 K} = \frac{P_{2} \times 2.60 L}{309 K}

          P_{2} = 681.03 mm Hg

Thus, we can conclude that new pressure P_{2} is 681.03 mm Hg.

6 0
3 years ago
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