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blsea [12.9K]
3 years ago
5

I am a fourth period transition metal. And when you look at

Chemistry
1 answer:
Allushta [10]3 years ago
7 0

Answer:

nc

Explanation:

cjshdgcuidenuyeiydn7eydn8y8c

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What is the numerical value of Avogadro's number?
lys-0071 [83]
<span>6.0221409e+23 - Google calculator. 
for more information I would recomend watching this khan academy video for help :)
https://www.khanacademy.org/science/health-and-medicine/lab-values/v/the-mole-and-avogadro-s-number

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8 0
3 years ago
What is the most reactive metal
ohaa [14]


Some people think its francium and some people believe it is either sodium or potassium.

Some people believe that the most reactive element is francium because the larger the atom, the easier it is to get rid of the valence electrons and the easier it is to react with other atoms. so now if you look at the periodic table, francium has the largest radius and so that's why some people think its francium. but in my opinion, Francium AND Cesium.

6 0
3 years ago
A sample of coal has the following analysis (wt %). Moisture 1.1%, Fixed Carbon 74%, Volatile Matter 17.9%, Carbon 63.7%, Hydrog
pogonyaev

Answer:

Coal is a traditionally used source of energy, there are main four types of ranks for coal. Here the rank of a coal means to a natural process called Coalification, which takes place during a plant is buried and changes to a harder, and denser material and become even more rich in carbon contents.

Anthracite is know to have the highest ranked coal, it contains highest percent of fixed carbon and lowest percent of volatile material.

4 0
3 years ago
According to the authors, the most effective means of developing _______________ are instrumental chemistry, microscopy, photoma
blsea [12.9K]

Answer:

Associative Evidence

Explanation:

According to the authors, the most effective means of developing associative evidence are instrumental chemistry, microscopy, photomacrography, other optical methods, and morphology. It is used to provide the link between and evidence and individual involved in a crime.

6 0
3 years ago
Assuming that the bath contains 250.0 g of water and that the calorimeter itself absorbs a negligible amount of heat, calculate
Anvisha [2.4K]

Answer:

-3272     kJ/mol

Explanation:

Given and known facts

Mass of Benzene = 0.187 grams

Mass of water = 250 grams

Standard heat capacity of water = 4.18 J/g∙°C

Change in temperature ΔT = 7.48°C

Heat

=250 * 4.18 * 7.48\\=7816.6 \\=7.82

Heat released by benzine is - 7.82 kJ

Now, we know that

0.187 grams of benzene release = -7.82  kJ heat

So, 1 g benzine releases

\frac{ -7.82 }{0.187}\\= -41.8

kJ/g

0.187 * \frac{1}{78.108}=0.00239 mol C6H6

Heat released

= \frac{-7.82}{ 0.00239}

=-3272     kJ/mol

4 0
3 years ago
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