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Tema [17]
3 years ago
15

I will mark brainliest if all answered or if you don’t want to answer them all please just answer 9-15

Chemistry
1 answer:
stira [4]3 years ago
4 0

Answer:

9. b

10.d

11.f

12.g

13.e

14.a

16.a

17.d

18.c

19.a

Explanation:

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7 0
2 years ago
How many atoms are in 1.204x10^22 moles of arsenic?
ra1l [238]

Answer:

<h2>0.02 moles </h2>

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

We have

n =  \frac{1.204 \times  {10}^{22} }{6.02 \times  {10}^{23} }    \\  = 0.02

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<h3>0.02 moles</h3>

Hope this helps you

7 0
3 years ago
Where does the year go in a bar graph
Pani-rosa [81]
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7 0
3 years ago
2. If you are given the mass of a reactant in grams and want to calculate the mass of
Darina [25.2K]

Answer:

1. Convert given mass of reactant to moles.

2. Convert moles of reactant to moles of product using the coefficients in the balanced equation.

3. Convert moles of product back to grams of product

Explanation:

In order to find out the mass of a given product in grams you would have to convert the grams into moles by multiplying 1 mole over the given mass of the reactant. Then, you would convert the moles of the reactant into moles of the product using mole ratio. And lastly, you would multiply by the mass of the product to calculate the mass back to grams.

Hope this helps!!<3

6 0
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In order to ice to melt it must absorb heat This makes it an blank process.
sveta [45]

Answer: A. Endothermic

Explanation:

In an endothermic reaction, heat is sucked in from the surrounding area by the reactants so that they may use it to react and form new products. This will therefore reduce the temperature in the said surrounding by the amount that the reaction needed.

This is what ice does when it melts. It sucks in the heat surrounding the area and then melts but leaves the area colder. For instance, putting ice in water ensures that the ice melts but because it sucked in the heat from the water to do so, the water gets colder as a result.

7 0
3 years ago
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