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Monica [59]
3 years ago
8

so i am doing a science project and i am doing it on mold i put water on the bread and cheese and left one in the dark and one i

n the light FOR A TWO WEEKS it isnt working why not
Chemistry
1 answer:
ivann1987 [24]3 years ago
3 0

Answer:

because the bread and cheese is absorbing the water whereas if you leave it dry in a moist humid place mold will start to appear

Explanation:

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Which explanation of the solar system best fits the observations of the planets and how they orbit the sun?
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<span>The sun and planets formed from a collapsing spinning cloud of gas and dust.</span>
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Determine the empirical formula of a compound that contains 30.45% nitrogen and 69.55% oxygen
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I might not be right but I think the empirical formula is NO2

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3 years ago
a 22.44g sample of iron absorbs 180.8 J of heat, upon which the temperature of the sample increases from 21.1C to 39.0/ what is
NeX [460]

Answer:

The specific heat of iron is 0.45 J/g.°C

Explanation:

The amount of heat absorbed by the metal is given by:

heat = m x Sh x ΔT

From the data, we have:

heat = 180.8 J

mass = m = 22.44 g

ΔT = Final temperature - Initial temperature = 39.0°C - 21.1 °C = 17.9°C

Thus, we calculate the specific heat of iron (Sh) as follows:

Sh = heat/(m x ΔT)  = (180.8 J)/(22.44 g x 17.9°C) = 0.45 J/g.°C

8 0
3 years ago
What should iron oxide be categorized
11111nata11111 [884]

Answer:

What are you doing stepbro?

Explanation:

5 0
3 years ago
Read 2 more answers
PLS HELP Students in a chemistry class added 5 g of Zinc (Zn) to 50 g of hydrochloric acid (HCl). A chemical reaction occurred t
Vitek1552 [10]

Answer: In simplest case mass of reactants is same as mass of products.

Without thinking this question deeper, mass of ZnCl2 would be 49, but..

Explanation: Reaction should be  Zn + 2 HCl ⇒ ZnCl2 + H2

Amount of zinc is  5 g / 65,38 g/mol = 0,076476 mol and amount

of Hydrogen Chloride is 50 g / 36.458 g/mol = 1,371 mol.

Althought HCl is needed 0.152 moles, zinc is an limiting reactant.

So it is possible to produce only 0.076476 mol Hydrogen and its mass

is 0.154 g.  Mass of ZnCl2 would be 0.076476 mol · (65.38 + 2·35.45) =

 10.42 g

4 0
3 years ago
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