Why does the weight of the dry ice go down while it’s sitting on the scale

1 answer:

6 0

Dry ice is colder, heavier, less messy than regular ice. If I understood your question correctly, the mass of it would decrease bc it is being dispersed into the air as carbon dioxide.

Explanation:

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The ph of coffee is 5.6. The ph of grapefruit juice is 2.6. This means that the proton concentration in coffee is

Brrunno [24]

pH scale is used to measure the acidity or alkalinity on a scale of 0-14 where 0-6.9 is the acidic region , 7.1-14 is the basic region and 7 is for the neutral substance. We can calculate the concentration of proton from pH.

$pH=-log[H^+]$

where $[H^+]$ is the concentration of proton

As per the question ,the pH of coffee is 5.6 and we need to find the concentration of proton so putting the values in the above equation, we get

$5.6=-log[H^+]$

$-5.6=log[H^+]$

$antilog(-5.6)= [H^+]$

$[H^+]= 2.511\times10^-^6 M$

6 0

3 years ago

During an experiment a thermometer was placed in a beaker containing hydrogen peroxide. The following observations were recorded

wlad13 [49]

The states of matter change to produce the same or the new substance. When yeast is added to hydrogen peroxide bubble of carbon dioxide is formed which indicates chemical change.

<h3>What is a chemical change?</h3>

A chemical change is the formation of a new substance by the chemical alterations in the reactants. The yeast releases products of cellular respiration that react with hydrogen peroxide.

The reaction is exothermic as it releases heat and increases the temperature when measured by the thermometer. The Fizzing and bubbling occur when carbon dioxide reacts with H₂O₂ to produce a new substance.

Therefore, addition of yeast to hydrogen peroxide is a chemical change.

Learn more about chemical change here:

brainly.com/question/27935965

#SPJ1

6 0

2 years ago

5) When heated in a flame, the element Indium emits electromagnetic radiation with a distinctive indigo blue

grandymaker [24]

Answer:

$\lambda=451nm$

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve this problem by using the following equation, defined in terms of energy, Planck's constant, wavelength and speed of light:

$E=\frac{hC}{\lambda }$