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Damm [24]
3 years ago
5

What is a group in the periodic table of elements?

Chemistry
2 answers:
chubhunter [2.5K]3 years ago
3 0

Answer:

B. The elements that have similar densities and atomic sizes

Explanation:

xeze [42]3 years ago
3 0

Answer:

carbon

Explanation:

just took the quiz

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A person wishes the heat pot of freshwater from 20°C to 100°C in order to boil water for pasta they calculate that their pot hol
larisa86 [58]

Q=mcΔt

669440 = 2.10³ x 4.184 x (100-20)

669440 = 669440 √ (correct)

7 0
2 years ago
Aqueous potassium chloride will react with which one of the following to form a precipitation reaction?
Svetllana [295]

Answer:

lead (II) chlorate

Explanation:

precipitate means not soluble in water

potassium chlorate is not very soluble in water, it precipitates and may be collected by filtration

lead(II) chloride can be made as a white precipitate by adding a solution containing chloride ions to lead(II) nitrate solution

thoughtcocom chemguidecouk

5 0
2 years ago
A sample of the mineral hematite Iron (III) oxide has a mass of 12.4g. How many moles of the mineral are present?
8090 [49]

Thus problem is providing us with the mass of iron (III) oxide as 12.4 g so the moles are required and found to be 0.0776 mol after the calculations:

<h3>Mole-mass relationships:</h3>

In chemistry, we use mole-mass relationships in order to calculate grams from moles and vice versa. In this case, since we are given the mass of iron (III) oxide as 12.4 g one can calculate the moles by firstly quantifying its molar mass:

Fe_2O_3\rightarrow 2*55.85 g/mol+3*16.00 g/mol=159.7g/mol

Then, we prepare a conversion factor in order to cancel out the grams and thus, get moles:

12.4gFe_2O_3*\frac{1molFe_2O_3}{159.7gFe_2O_3} \\\\=0.0776molFe_2O_3

Learn more about mole-mass relationships: brainly.com/question/18311376

8 0
2 years ago
( copper is Cu) How many Copper atoms in 3CuSO 4<br><br> Need help ASAP !!!!!
nydimaria [60]
There are the 3 copper atoms in 3CuSO4. I hope this helps!!
5 0
3 years ago
How many grams are in 4.63 x 1024<br><br> molecules of CCl4?
MrRa [10]

Answer:

m=1,182.8g

Explanation:

Hello!

In this case, since the relationship between molecules and mass is first analyzed via the Avogadro's number to compute the moles in the given molecules:

mol=4.63x10^{24}molec*\frac{1mol}{6.022x10^{23}molec}=7.69mol

We now use the molar mass of carbon tetrachloride (153.81 g/mol) to obtain the required grams:

m=7.69mol*\frac{153.81g}{1mol} \\\\m=1,182.8g

Best regards!

6 0
3 years ago
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