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Elena-2011 [213]
3 years ago
6

8)How many grams are in 0.02 moles of beryllium iodide, BeI2?

Chemistry
1 answer:
n200080 [17]3 years ago
4 0

Answer:

0.03:---$7--$-$7$--$-$-$$-$+-$$7-$$-$7-$8$+$-$

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Which structure below contains all of the others?<br> DNA<br> gene<br> chromosome<br> nucleus
kodGreya [7K]

Answer:

nucleus

Explanation:

The nucleus holds all the other things, keeping them safe and confined.

4 0
3 years ago
Read 2 more answers
Calculate the amount of energy when water at 72 degrees c freezes completely at 0 degrees c
gtnhenbr [62]

<u>Answer:</u>

<em>The amount of energy needed when water at 72 degrees c freezes completely at 0 degrees c is 6.37\times10^4 Joules</em>

<em></em>

<u>Explanation:</u>

Q = m \times c \times \Delta T

where

\Delta T = Final T - Initial T

$Q_{1}=100 g \times 4.184 \frac{J}{g^{\circ} \mathrm{C}} \times\left(72^{\circ} \mathrm{C}-0^{\circ} \mathrm{C}\right)$

Q_1 =30125J

Q is the heat energy in Joules  

c is the specific heat capacity (for water 1.0  cal/(g℃))  or 4.184  J/(g℃)

m is the mass of water

mass of water is assumed as 100 g (since not mentioned)

Q_2  is the heat energy required for the phase change

Q_2 =mass × heat of fusion

\\$Q_{2}=100 g \times 336 \frac{J}{g}$\\\\$Q_{2}=33600 J$

Total heat = Q_1 + Q_2

Total Heat = 30123J + 33600J

= 63725 J

= 6.37\times10^4 Joules is the answer

3 0
3 years ago
Consider a bathtub holding a system of water (where the boundaries of the tub are the boundaries of the system) under the follow
Luba_88 [7]

Answer:

a)  the system is closed

b) the system is open

Explanation:

a) the system can be characterised as closed system. If we define the boundaries of this system as an envelope that contains the bathtub, then there will not be any mass transfer to the environment through the boundary → then the system is closed ( the mass of the system remains constant)

b) on the other hand , taking the same system as in the first case, if the hot water is continually added to the tub , then there is water flow through the boundary (from the environment to the system) → then the system is open ( the mass of the system can be altered)

4 0
3 years ago
Devise a way to separate a mixture of sand, salt, and iron filings. Write the procedure using a step-by-step method and explain
aev [14]
1. Iron fillings are magnetic, so use a magnet to pull the iron fillings out of the mix.
2. Then you can put the salt and sand mixture into water, since salt is soluble, and the salt will dissolve, leaving you with sand.
3 0
3 years ago
Iron(111)Carbonate +cesium &gt; cesium carbonate +iron balced
ipn [44]

Balanced chemical equation for the given reaction is Fe₂(CO₃)₃ + 6Cs → 3Cs₂CO₃ + 2Fe.

<h3>What is balanced equation?</h3>

Balanced chemical equations are those equations in which all entities are present in equal amount on reactant side as well as on product side.

Given balanced chemical reaction is:
Fe₂(CO₃)₃ + 6Cs → 3Cs₂CO₃ + 2Fe

Above given equation is a balanced chemical equation where all atoms of reactant as well as of products are present in same amount.

Hence, required balanced equation is Fe₂(CO₃)₃ + 6Cs → 3Cs₂CO₃ + 2Fe.

To know more about balanced chemical reaction, visit the below link:
brainly.com/question/26694427

#SPJ1

3 0
2 years ago
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