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levacccp [35]
2 years ago
11

The element in group 4 and period 3

Chemistry
2 answers:
sladkih [1.3K]2 years ago
8 0
The three group 4 elements that occur naturally are titanium, zirconium, and hafnium. The first three members of the group share similar properties; all three are hard refractory metals under standard conditions.
olganol [36]2 years ago
7 0

the answer is

Si

Silicon

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To find the Ce4+ content in a solid sample, 4.3718 g of the solid sample were dissolved and treated with excess iodate to precip
gulaghasi [49]

Answer:

3.43 %

Explanation:

We need  to calculate first the number of moles of CeO2 produced in the combustion. Given its formula we know how many moles of Ce atom are present. From there calculate the mass this number of moles this represent and then one can calculate the percentage.

0.1848 g CeO2 x 1 mol CeO2/172.114g = 0.00107 mol CeO2

0.00107 mol CeO2 x 1 mol Ce/ 1 mol CeO2 = 0.00107 mol Ce

.00107 mol Ce x 140.116 g Ce/ mol  =  0.150 g Ce

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5 0
3 years ago
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kozerog [31]
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=  4510 / 100 =45.10 moles
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by use of mole ratio between CaCO3  to CaO  (1:1) the  moles of CaO  is also= 45.10 moles
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45.10  x56 = 2525.6  g  of  CaO



6 0
3 years ago
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If a flame is yellow is it considered dirty or clean?And to make it blue do you add or take away air?
Step2247 [10]
It is clean and is blue when you take away air hope i helped.
8 0
2 years ago
Element A has a half-life of 10 days. A scientist measures out 200 g of this substance. After 30 days has passed, the scientist
myrzilka [38]
N=N₀*2^(-t/T)

N₀=200 g
T=10 d
t=30 d

N=200*2^(-30/10)=25 g

25 g will remain
4 0
3 years ago
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IRINA_888 [86]

Answer:

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Explanation:

3 0
3 years ago
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