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4 years ago

what gas was given off when hydrogen peroxide is broken down? recall that the formula for hydrogen peroxide is h2o2?

Chemistry

1 answer:

Anna35 [415]4 years ago

5 0

When hydrogen peroxide is broken down the gas released or given off is Oxygen.

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The food for dicot embryos is stored in the____ while food for monocot embryos is stored in the___ .

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The food for divot embryos is stored in the “endosperm” while food for monocot embryos is stored in the “cotyledons”.

This is the right answer

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3 years ago

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8. Fill in the blanks underneath the wave spectrum to indicate the relative positions of each type of

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Ultraviolet as ultraviolet light waves are around 420 nm like stated in the photo

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3 years ago

A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L . If the temperature changes to 70 ∘C ,

bixtya [17]

Answer:

1528.3L

Explanation:

To solve this problem we should know this formula:

V₁ / T₁ = V₂ / T₂

We must convert the values of T° to Absolute T° (T° in K)

21°C + 273 = 294K

70°C + 273 = 343K

Now we can replace the data

1310L / 294K = V₂ / 343K

V₂ = (1310L / 294K) . 343K → 1528.3L

If the pressure keeps on constant, volume is modified directly proportional to absolute temperature. As T° has increased, the volume increased too

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4 years ago

The final volume of buffer solution must be 100.00 mL and the final concentration of the weak acid must be 0.100 M. Based on thi

Grace [21]

Answer:

0.387 g

Explanation:

pH of the buffer = 1

V = Volume of solution = 100 mL

[HA] = Molarity of HA = 0.1 M

$K_a$ = Acid dissociation constant = $1.2\times 10^{-2}$

(assuming base as $Na_2SO_410H_2O$ )

Molar mass of base = 322.2 g/mol

pKa is given by

$pK_a=-\log K_a\\\Rightarrow pKa=-\log(1.2\times 10^{-2})\\\Rightarrow pK_a=1.92$

From the Henderson-Hasselbalch equation we get

$pH=pK_a+\log\dfrac{[A^-]}{[HA]}\\\Rightarrow pH-pK_a=\log\dfrac{[A^-]}{[HA]}\\\Rightarrow 10^{pH-pK_a}=\dfrac{[A^-]}{[HA]}\\\Rightarrow [A^-]=10^{pH-pK_a}[HA]\\\Rightarrow [A^-]=10^{1-1.92}\times0.1\\\Rightarrow [A^-]=0.01202\ \text{M}$

Moles of base

$0.01202\times100\times\dfrac{1}{10^3}=0.001202\ \text{moles}$

Mass of base is given by

$0.001202\times 322.2=0.387\ \text{g}$

The required mass of the base is 0.387 g.

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3 years ago

Which of the following indicates a reaction with a positive ΔG? A. endergonic, spontaneous B. endergonic, not spontaneous C. exe

shtirl [24]

Answer: B. endergonic, not spontaneous

Explanation:

Endergonic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and $\Delta H$ for the reaction comes out to be positive.