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Helen [10]
2 years ago
13

Grace wanted to find out the best conditions for growing lettuce plants.

Chemistry
1 answer:
Mariana [72]2 years ago
8 0

Explanation:

the investigation lasts for 7 days !

hope this helps you.

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How many grams of H2O are in 34.2 grams of NAOH<br> Need ASAP
Brrunno [24]

Answer:

15.438g H2O

Explanation:

First you need to find the reaction equation:

2H2O+2Na=2NaOH + H2

Hydrogen is a diatomic molecule so it will have a subscript of 2 on the right hand side. From there we can balance the reaction.    

Then we can use stoichiometry:

34.2g NaOH * (1 mol NaOH/39.908g NaOH) * (2 mol H2O/2 mol NaOH) * (18.015g H2O/1 mol H20) = 15.438g H2O

It is important that when you use stoichiometry that all your units cancel out until you only have the unit you want.

3 0
2 years ago
How much calcium hypochlorite (65% strength) is needed to make 200 L of 2% hypochlorite solution? (Assume that a 1% solution is
g100num [7]

To solve this we use the equation,

 

M1V1 = M2V2

 

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

 

65 x V1 = 2 x 200 L

V1 = 6.15 L

5 0
3 years ago
When an object that is moving slows down, which action must be occurring?
IceJOKER [234]
C unbalanced force is occuring
5 0
3 years ago
Read 2 more answers
Help with this question for chemistry!!
wel
Emperic formula is SO subscript 2. Molecular formula would be SO subscript 2 multiply 1 so it's the same answer.
7 0
3 years ago
In which of these samples do atoms have the greatest kinetic energy
shepuryov [24]

Answer is: atoms have the greatest kinetic energy in liquid iron (2,000°C).

The average kinetic energy of molecules depends on the temperature. 

At high temperature(2,000°C), molecules of iron have greater kinetic energy than molecules of iron at low temperature (1,600°C, 65°C and 25°C)..

Read more on Brainly.com - brainly.com/question/8237916#readmore

7 0
3 years ago
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