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I am Lyosha [343]
3 years ago
5

What must be true of a disproportionate substance?

Chemistry
2 answers:
Taya2010 [7]3 years ago
8 0
D. It gains and loses electrons
Rudik [331]3 years ago
4 0

Answer:

Answer is D.it gains and loses electrons.

Explanation:

I hope it's helpful!

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kvasek [131]

Answer:

B. Biosphere.

Explanation:

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Help me now When you look up into the night sky, you will usually see the moon. If you were to look at it each
Mama L [17]

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Your pee

Explanation:

When you have to pee you pee

6 0
3 years ago
How much heat energy is required to melt 75g of ice at 0°C?
Mnenie [13.5K]

The enthalpy change for melting ice is called the entlaphy of fusion. Its value is 6.02 kj/mol. This means for every mole of ice we melt we must apply 6.02 kj of heat. We can calculate the heat needed with the following equation:

Q = N x ΔH

where:

Q  = heat

N  = moles  

ΔH  = enthalpy

In this problem we would like to calculate the heat needed to melt 35 grams of ice at 0 °C. This problem can be broken into three steps:


1. Calculate moles of water

2. multiply by the enthalpy of fusion

3. Convert kJ to J.


Step 1 : Calculate moles of water

[ 75g ] x (\frac{1 mol}{18.02g} ) =

Step 2 : Multiply by enthalpy of fusion

Q = N × ΔH  = <em> [ Step 1 Answer ]</em> ×  6.02 =

Step 3 : Convert kJ to J

[ Step 2 Answer ] x (\frac{1000j}{1kJ} ) =

Finally rounding to 2 sig figs (since 34°C has two sig figs) we get


Q Would Equal ____

4 0
3 years ago
When molecules slow down, they expand.<br><br> A <br> True<br><br> B <br> False
Jobisdone [24]

False. <--- This is wrong I was thinking of atoms


Molecules do expand when they slowdown...


3 0
3 years ago
Read 2 more answers
Which graph above shows an object’s acceleration? 1pt
Solnce55 [7]

Answer:

A. because the graph is moving uo

4 0
3 years ago
Read 2 more answers
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