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coldgirl [10]
3 years ago
15

For which of the following activities might you want to hire a chemist?

Chemistry
1 answer:
yarga [219]3 years ago
5 0

examining the structure of plant cells

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CaCO3---> CaO+CO2 How many moles of CaO form when 98.60g CaCO3 decompose? 98.60g CaCO3= ______ mol CaO
Sav [38]

Hey I think it is going to be 0986 moles. Cuz we can see that no. of moles of CaCO3 which will decompose is equivalent to the no. of CaO . Now it's just the matter of finding the no. of moles of CaCO3 .

<span>no.of moles=<span><span>mass /</span><span>relative molecular mass</span></span></span>

3 0
3 years ago
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If 3.0 g of NH3 reacts with 5.0 g of HCl, what is the limiting reactant?
ELEN [110]
<h2>Answer:HCl</h2>

Explanation:

\text{number of moles}=\frac{\text{given mass}}{\text{molar mass}}

For NH_{3},

\text{given mass}=3g

\text{molar mass}=14+3=17g

n_{NH_{3}}=\frac{3}{17}=0.176

For HCl,

\text{given mass}=5g

\text{molar mass}=1+35.5=36.5g

n_{HCl}=\frac{5}{36.5}=0.136

The reaction between NH_{3} and HCl is

NH_{3}+HCl→NH_{4}Cl

So,one mole of NH_{3} requires one mole of HCl

0.176 moles of NH_{3} requires 0.176 moles of HCl

But there are only 0.136 moles of HCl available.

HCl will be consumed first.

So,HCl is the limiting reagent.

7 0
3 years ago
A patient needs to take her cholesterol medication every morning and night. Her prescription bottle most likely says
mamaluj [8]

Answer:

1+0+1

Explanation:

7 0
3 years ago
Convert 52.09 km/h into m/s.
Fudgin [204]

Answer:

52.09×5/18

14.44 m/s

I hope it's helps you

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