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3 years ago

What is the independent variable for a dry ice experiment

Chemistry

2 answers:

Leviafan [203]3 years ago

7 0

The independent variable is the amount of dry ice

oee [108]3 years ago

5 0

The variable is that the dry ice will bee like smoke

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34kurt

Answer:

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Explanation:

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3 years ago

Select the correct answer. Which is a chemical change? A. water boiling B. wood burning C. glass breaking D. ice melting E. mold

asambeis [7]

B. wood burning is a chemical change.

4 0

3 years ago

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What is the specific heat of the solid phase? (Please see picture attached)

ValentinkaMS [17]

Answer:

B.0.2 J/g°C

Explanation:

From the attached picture;

Heat attained in the solid phase is 200 Joules
Change in temperature is 50°C ( from 0°C to 50°C)
Mass of the solid is 20 g

We are required to determine the specific heat capacity of the substance;

We need to know that Quantity of heat is given by the product of mass,specific heat capacity and change in temperature.
That is; Q = mcΔT

Rearranging the formula;

c = Q ÷ mΔT

Therefore;

Specific heat = 200 J ÷ (20 g × 50°c)

= 0.2 J/g°C

Thus, the specific heat of the solid is 0.2 J/g°C

4 0

3 years ago

Which part of an atom has most of its mass? electrons neutrons nucleus protons NextReset

sergey [27]

C) Nucleus...... Hope it helps, Have a nice day :)

3 0

3 years ago

A solution is made

Anna11 [10]

Answer:

99.3%

Explanation:

The percent by mass of the solute can be expressed as:

% mass = $\frac{MassSolute}{MassSolute+MassSolvent}$ * 100%

And for this problem:

Mass of Solute = Mass of sodium lithium chloride = 29 g

Mass of Solvent = Mass of Water

So to calculate the percent by mass first we need to calculate the mass of water, to do so we use its density (1 g/L):

202 mL is equal to (202/1000) 0.202 L.

Density water = mass water / volume

1 g/L = mass water / 0.202 L

Mass water = 0.202 g

Now we have all the data required to calculate the % mass:

% mass = $\frac{29g}{29g+0.202g}$ * 100 % = 99.3%

3 0

3 years ago

Read 2 more answers