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3 years ago

KNO

Chemistry

1 answer:

Artyom0805 [142]3 years ago

5 0

Answer:

that so hard man its okay

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Without the process of transpiration, what might happen to a plant?

vladimir1956 [14]

Transpiration is a process in which the stomata opens, allowing water to leaf of a plant to trap as well as release water. The leaf turning orange which would mean it does not have access to water, but how could that be true without transpiration? Therefore I think the answer is d. The plant couldn't release any water, allowing it to burst over the course of time.

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4 years ago

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How cold does it have to be for boiling water to freeze instantly

scZoUnD [109]

Answer:

Below 0° degrees Celcius

Explanation:

For deposition (gas to solid) to happen, the temperature has to be below 0° Celsius. If so, deposition occurs, and ice crystals form.

3 0

2 years ago

At 1000°C, cyclobutane (C4H8) decomposes in a first-order reaction, with the very high rate constant of 68 1/s, to two molecules

Kazeer [188]

Answer:

$t=0.0114 s$

Explanation:

For first order reaction we are going to use the following formula:

$t=\frac{2.73}{k} \log\frac{x}{x-a}$

where:

k is the constant

x is the initial concentration

a is the final concentration

x-a is the amount left

IN our Case:

k=68 (1/s), x=1.84. Calculating x-a:

% of cyclobutane left after time t=100-52=48%

Final Concentration=1.84*48%=0.8832

x-a=Initial concentration - Final Concentration

x-a=1.84-0.8832

x-a=0.9568

Now:

$t=\frac{2.73}{68} \log\frac{1.84}{0.9568}$

$t=0.0114 s$

In order,for cyclobutane to decompose to 52%, time taken is 0.0114 sec.

8 0

3 years ago

What kinds of things could a magnet make another object or magnet do without touching it?

Sidana [21]

Answer:

Magnets can be used to make other magnets and things made of iron move without being touched. Something that has been electrically charged can make other things move without touching them.

Explanation:

(can someone help me with my question?)

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3 years ago

23.6 g of calcium chloride (110.98) is dissolved in water in a calorimeter. T rose from 25.0°C to 38.7°C. Heat capacity of solut

Soloha48 [4]

Answer:

Enthalpy Change when 1 mole CaCl₂ dissolves

= - 81.13 kj/mole

Explanation:

Given information

Mass of CaCl₂ = 23.6 g

Temperature changes from 25.0°C to 38.7°C

Heat capacity of solution & calorimeter (C) = 1258 J/°C

We know Q = C x ΔT

⇒ Heat released = 1258 x (38.7 - 25)

= 1.7234 x 10⁴ J

= 17.2 Kilo-joule

Thus 23.6 g is equivalent to 1.7234 x 10⁴ J or 17.2 Kilo-joule of heat energy

Molar mass of calcium chloride (110.98)

$Mole =\frac{Mass}{Molecular mass} = \frac{23.6}{110.98} =0.212 mole$

Enthalpy Change when 1 mole CaCl₂ dissolves

= $\frac{-17.2}{0.212} kj/mol = -81.13 kj/mole$

5 0

3 years ago