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muminat
3 years ago
10

As part of an investigation, students combined substances in a beaker to observe chemical reactions. They performed two procedur

es. They measured the mass of each substance before and after each reaction. The table shows their observations. Assuming the students did not make any careless errors, what likely explains these changes in mass?
Question 3 options:

Procedure 1: All the reactants were liquids that evaporated. Procedure 2: A gas was formed as one product, and it escaped into the air.

Procedure 1: One of the reactants was converted to thermal energy. Procedure 2: All the products were liquids.

Procedure 1: The reactants were liquids with different densities. Procedure 2: The reactants were combined into only one product.

Procedure 1: One of the products was a gas that escaped into the air. Procedure 2: A gas from the air reacted with one of the other reactants.
Chemistry
2 answers:
lara31 [8.8K]3 years ago
6 0
The 2 one i think so if not the last one
Alekssandra [29.7K]3 years ago
5 0

Answer:

D

Explanation:

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________ climate is summerless with the average temperature of the warmest month below 10°c.
amid [387]

Answer:

Polar

Explanation:

A polar climate is a place where the climate usually has a temperature below freezing, icy, and covered in snow. These areas do not get direct heat and sunlight from the sun. Polar climates are located at the North Pole of the Arctic, and at the South Pole on the continent of Antarctica.

8 0
1 year ago
What is the energy in joules of one photon of<br> microwaveradiation with a wavelength 0.122m?
pentagon [3]

<u>Answer:</u> The energy of photon is 162.93\times 10^{-26}J

<u>Explanation:</u>

The relation between energy and wavelength of light is given by Planck's equation, which is:

E=\frac{hc}{\lambda}

where,

E = energy of the light  = ?

h = Planck's constant  = 6.626\times 10^{-34}Js

c = speed of light = 3\times 10^8m/s

\lambda = wavelength of photon = 0.122 m

Putting values in above equation, we get:

E=\frac{(6.626\times 10^{-34}Js)\times (3\times 10^8m/s)}{0.122m}\\\\E=162.93\times 10^{-26}J

Hence, the energy of photon is 162.93\times 10^{-26}J

3 0
3 years ago
For the reaction between solid tetraphosphorus trisulfide and oxygen gas to form solid tetraphosphorus decoxide and sulfur dioxi
Rainbow [258]

1 mole of  reacts with 8 moles of  to form 1 mole of  and 3 moles of

<h3>What is a tetraphosphorus decoxide?</h3>

Tetraphosphorus decoxide, () is a non-metal oxide that gives acidic property when dissolved in water.

The name phosphorus decoxide can be interpreted as 4 phosphorus (P) atoms (‘Tetra’), bonds with 10 oxygen (O) atoms (‘Dec’) in a molecule. besides that, it is also known as phosphorus pentoxide.

It can be prepared by heating pure phosphorus with oxygen in blast furnace.

+  →

It is used as a dehydrating agent due to its week van der Waals dispersion forces. Thus, owing to give exothermic reaction when dissolved in watermore precisely, it is a white crystalline anhydrous (without water molecule) solid.

In granular form it can be also used as desiccant as well.

Learn more about phosphorus from the given link:

brainly.com/question/25352398

#SPJ4

3 0
1 year ago
How many moles of magnesium are needed to react with 3.0 mol of O2?
labwork [276]

Answer:

2 moles

Explanation:

6 0
2 years ago
When only one color of light reflects from a piece of paper, what happens to the other colors of light? Remember that light is e
marta [7]

Answer:

The other colors of the electromagnetic spectrum are absorbed by the substance and not reflected. If you were to look at it in infared or unltraviolet it would reflect different colors than those of the visible spectrum.

Explanation:

6 0
3 years ago
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