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Andrews [41]
4 years ago
10

. Which of the following statements best describes the relationship between elements and compounds?

Chemistry
1 answer:
vampirchik [111]4 years ago
8 0
I think the answer is A
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What is the Ionic Equation and Net Ionic Equation for BaCl2 + Al2(SO4)=> 3Ba(SO4) + 2AlCl3?
Nikitich [7]
I think you want to ask the complete ionic equation and net ionic equation. For complete ionic equation: 3Ba2+ + 6Cl- + 2Al3+ + 3SO42- -->3BaSO4 + 2Al3+ + 6Cl-. For net ionic equation: 3Ba2+ + 3SO42- -->3BaSO4.
8 0
3 years ago
What amount of SeC16 is needed to produce 4.45 mol of chlorine gas in the
AlladinOne [14]

Answer:

1.48 moles of SeCl6 are needed

Explanation:

Based on the reaction:

SeCl6 + O2 → SeO2 + 3Cl2

<em>1 mole of SeCl6 reacts producing 3 moles of Cl2.</em>

To solve this question we need to use the conversion factor:

1mol SeCl6 = 3mol Cl2

As we want to produce 4.45 moles of Cl2, we need:

4.45 mol Cl2 * (1mol SeCl6 / 3mol Cl2) =

<h3>1.48 moles of SeCl6 are needed</h3>
6 0
3 years ago
In France, grapes are 1.75 Euros per kilogram. What is the cost of grapes in dollars per pound if the exchange rate is 1.36 doll
Jet001 [13]

You want to convert Euros / kg to Dollars / pound

 

So you'll have to multiply the price (Euros / kg) by the exchange rate (Dollars / Euro) to get a number that has units of Dollars / kg.

 

Euros     Dollars       Dollars

-------  x ---------   =  --------

 kg         Euro             kg

 

Then you have to multiply the number of kg in a pound (which has units of kg / pound) to get a number in units of Dollars / pound.  This number is 2.2.

 

Dollars       kg              Dollars

--------  x --------   =      --------

  kg        pound           pound

 

So the answer would be 1.75 * 1.36 / 2.2 = 1.08 dollars / pound.

3 0
3 years ago
How many moles of Chromium are in 1.410 * 10 ^ 23 atoms of Chromium?
leva [86]

Answer:

<h3>The answer is 0.23 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{1.410 \times  {10}^{23} }{6.02 \times  {10}^{23} }  \\  = 0.234219...

We have the final answer as

<h3>0.23 moles</h3>

Hope this helps you

4 0
3 years ago
Al (NO3)3 + H2S –»<br><br>please help me​
Stella [2.4K]

Answer:

this reaction is a double displacement reaction in which, Aluminium nitrate reacts with hydrogen sulphide to form nitric acid and Aluminium sulphide.

here is the balanced chemical equation for the above reaction :

2 Al (NO3)3 + 3 H2S -> 6 HNO3 + Al2S3

4 0
3 years ago
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