1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ankoles [38]
3 years ago
9

Elena makes the table below to determine the number of atoms of each element in the chemical formula 3(NH4)2SO4

Chemistry
2 answers:
Vikentia [17]3 years ago
6 0

Answer:

A) She should not have multiplied the sulfur atoms by the subscript 4.

Explanation:

frozen [14]3 years ago
5 0

Answer:

she should not have multiplied the sulfur atoms by the subscript 4

Explanation:

You might be interested in
The __lithosphere__ combines the two crusts, oceanic and continental, with the coolest part of the __________________. The asthe
zmey [24]

Answer:

The lithosphere And the upper mantle combines the two crusts, oceanic and continental, with the coolest part of the Crust?. The asthenosphere allows the tectonic plates to slide on the putty substance of the mantle and the mesosphere is the Smallest? part of the mantle. The outer core is hot enough to turn the metal into a Liquid The inner core is the hottest but the extreme pressure makes it a Solid.

8 0
3 years ago
Read 2 more answers
Suppose you are working with a NaOH stock solution but you need a solution with a lower concentration for your experiment. Calcu
Monica [59]

Answer: The volume of the 1.224 M NaOH solution needed is 26.16 mL

Explanation:

In order to prepare the dilute NaOH solution, solvent is added to a given amount of the NaOH stock solution up to a final volume of 250.0 mL.

Since only solvent is added, the amount of the solute, NaOH, in the dilute solution is the same as in the volume taken from the stock solution.

Molarity (<em>M)</em> is calculated from the following equation:

<em>M</em> = <em>n</em> ÷ <em>V</em>

where <em>n</em> is the number of moles of the solute in the solution, and <em>V</em> is the volume of the solution.

Accordingly, the number of moles of the solute is given by

<em>n</em> = <em>M</em> x <em>V</em>

Now, let's designate the stock NaOH solution and the dilute solution as (1) and (2), respectively . The number of moles of NaOH in each of these solutions is:

<em>n </em>(1) = <em>M </em>(1) x <em>V </em>(1)

<em>n </em>(2) = <em>M </em>(2) x <em>V </em>(2)

As the amount of NaOH in the dilute solution is the same as in the volume taken from the stock solution,

<em>n</em> (1) = <em>n</em> (2)

and

<em>M</em> (1) x <em>V</em> (1)<em> </em>= <em>M</em> (2) x <em>V</em> (2)

For the stock solution, <em>M</em> (1) = 1.244 M, and <em>V</em> (1) is the volume needed. For the dilute solution, <em>M</em> (2) = 0,1281 M, and <em>V</em> (2) = 250.0 mL.

The volume of the stock solution needed, <em>V</em> (1), is calculated as follows:

<em>V</em> (1) = <em>M</em> (2) x <em>V</em> (2) ÷ <em>M</em> (1)

<em>V</em> (1) = 0.1281 M x 250.0 mL ÷ 1.224 M

<em>V </em>(1) = 26.16 mL

The volume of the 1.224 M NaOH solution needed is 26.16 mL.

7 0
3 years ago
Briefly describe the movement of water through the water cycle
kotegsom [21]

1) Evaporization is phase change process in which the water changes from a liquid to a gas (water vapor). Solar radiation is the source of energy for evaporation.

2) Condensation is phase change process in which the water changes from a gas to a liquid, the vapor becomes a cloud.

3) Precipitation is falling of the condensed water vapor as rain, snow, fog drip.

The water cycle (hydrological cycle) is the continuous movement of water all around the Earth.


8 0
3 years ago
Read 2 more answers
When magnesium metal is heated in air it begins to release large amounts of heat and light. What kind of a reaction is this an e
Salsk061 [2.6K]
It is called exothermic reaction because it releases heat and light and it is called combustion reaction because it is reacting and is being oxidised by O2 to MgO. It can also be called as oxidation reaction since Mg is oxidised to MgO.
5 0
3 years ago
Read 2 more answers
3. Use the chart to answer the following question. Amanda found a stone
REY [17]

Answer:

Quartz

Explanation:

6 0
3 years ago
Other questions:
  • "Science" and "technology are words that often are mixed up, even though they have
    14·1 answer
  • A professional technician maintains and operates specialized scientific equipment true or false
    10·1 answer
  • Which of the following statements is true?
    8·2 answers
  • What is an atom? I'll give brainliest.
    5·1 answer
  • What are common chemicals used for lemons include fertilizer pesticide fungicide and herbicide chemicals that are typically util
    13·1 answer
  • (90 PTS) PLS HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!What type of environment do sedimentary rocks form in? Wher
    12·2 answers
  • A 10.0 g sample of a hydrate was heated until all the water was driven off. The mass of the anhydrous product remaining was 8.00
    7·1 answer
  • PORFA AYUDAA !!!
    6·1 answer
  • Solvent: Will give brainliest
    10·2 answers
  • The wave like behavior of moving particles cannot be observed due to the.........of the particles wavelengths?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!