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gtnhenbr [62]
4 years ago
6

A bird could be both a consumer and a producer

Chemistry
1 answer:
Ilia_Sergeevich [38]4 years ago
4 0
False, only Consumers.
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A 6.59-gram sample of a compound is dissolved in 250. grams of benzene. The freezing point of this solution is 1.02°C below that
iren2701 [21]

Answer:

30.12 g/m is the molar mass of the compound

Explanation:

Freezing point depression to solve this. The formula for the colligative property is:

ΔT = Kf . m

ΔT = T° freezing pure solvent - T° freezing solution

Kf = Cryoscopic constant

m = molality (mol/kg)

T° freezing pure benzene: 5.5°C

(5.5°C - 1.02°C) = 5.12 °C/m . m

4.48°C = 5.12 °C/m . m

4.48°C / 5.12 °C/m = m → 0.875 mol/kg

Mol = mass / molar mas

Molality = mol /kg

Let's find out the molar mass, with this equation:

(6.59 g / Molar mass)  / 0.250 kg = 0.875 mol/kg

6.59 g / molar mass = 0.875 mol/kg . 0.250 kg

6.59 g / molar mass = 0.21875 mol

6.59 g / 0.21875 mol = molar mass → 30.12 g/m

4 0
4 years ago
What is the third element in group nine?
Stels [109]
The third element in group nine is: I<span>ridium</span>
3 0
3 years ago
A student makes a cross-section clay model to represent the internal structure of a volcano that leads to the formation of two r
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CAnswer:

Explanation:

6 0
3 years ago
select the equations that are correctly balanced. h2o 2o2? h2o2 fe2o3 3h2? 2fe 3h2o al 3br2? albr3 caco3? cao co2 can you clarif
natta225 [31]
<span>The choices are as follows:
h2o + 2o2 = h2o2
 fe2o3 + 3h2 = 2fe + 3h2o
al + 3br2 = albr3
caco3 = </span><span>cao + co2

The correct answers would be the second and the last option. The equations that are correctly balanced are:

</span> fe2o3 + 3h2 = 2fe + 3h2o 
caco3 = cao + co2

To balance, it should be that the number of atoms of each element in the reactant and the product side is equal.
8 0
3 years ago
A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black substance that makes up the tar
bearhunter [10]

Answer: B

Explaination:  The liquid solution changed color means is turned into a different substance with different properties. It is chemical change .

5 0
3 years ago
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