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Ira Lisetskai [31]
3 years ago
12

Cecilia and tegan are learning about things that dissolve in water. They put sugar into a cup of water and saw that the sugar be

gan to dissolve. What could they do to make the sugar dissolve faster? 1. Use a spoon to stir it 2. Add bigger pieces of sugar into the cup 3. Freeze the water 4. Add less water
Chemistry
1 answer:
damaskus [11]3 years ago
8 0

Answer:

1. stir with a spoon

Explanation:

if you stir the water with a spoon, it quickens the process at which the sugar dissolves. The spoon you could say also speeds it all up. Think of it this way, a meteor entering earths atmosphere, will it get smaller faster going 50 mph, or 100mph? the regular is 50, but when you got the spoon, it increases (more gravity force on the meteor= that 100mph).

hope this helps.

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What is metallic conductivity ?
melamori03 [73]

Explanation:

metallic conduction:the movement of electrons through a metal, with no changes in the metal and no movement of the metal atoms.

I hope this help uuhh............

6 0
2 years ago
A block of iron has a mass of 826 g. What is the volume of the block of iron whose density at 25°C is 7.9
LuckyWell [14K]

Answer:

105

Explanation:

Density = mass/volume

therefore volume = mass/density

826/7.9=105 (To three significant figure)

8 0
3 years ago
<
victus00 [196]

Answer:

This isotope has 59 electrons giving it a charge of -2.

Explanation:

To find this we have to understand isotope relates to the mass of the nucleus. This isotope has 59 electrons to counter the protons and give it a negative charge.

6 0
3 years ago
1. Explain what is in a buffer. Discuss the function of a buffer. How will pH change when small amounts of acids or bases are ad
Nastasia [14]

Answer:

(1) See below, (2) About 8.4 pH, (3) About 3.981 * 10⁻⁶ mol dm⁻³

Explanation:

1. A buffer is a solution that resist pH when adding a basic or acidic compound. It's purpose is to neutralize added acids and bases.

2. Remember that the formula for pH is -log [H+]. We have a 0.1 M solution of baking soda in water with [H+] of about 4.0 × 10⁻⁹. Therefore we can calculate the pH as follows...

pH = -log (4.0 × 10⁻⁹)

pH = -(-8.39794...) = (About) 8.4 pH of 0.1 M of baking soda

3. This question has a similar set up...

pH = -log [H+]

[H+] = inverse of log^- pH

[H+] = 10^-5.4 = (About) 3.981 * 10⁻⁶

4 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Chuge%5Cbold%5Cred%7B%7BHELP%7D%7D" id="TexFormula1" title="\huge\bold\red{{HELP}}" alt="\hu
Ludmilka [50]

Answer:

<u>Question</u><u> </u><u>1</u><u> </u><u>:</u>

• A compound is ionic if it is made up of a metal or a cation (+) and a non metal or anion (-)

<u>Question</u><u> </u><u>2</u><u> </u><u>:</u>

• While naming ionic compounds, follow the formula → "metal" + "non-metal ending with <em>ide</em><em> </em>"

• i.e; Sodium Chloride:

{ \rm{Na {}^{ + } _{(aq)}  + Cl {}^{ - } _{(aq)} \:  \dashrightarrow \: NaCl _{(aq)}} \:  \:  \:  \:  \:  \:  \:  \:  } \\ { \rm{sodium  + chloride  \: \dashrightarrow \: sodium \: chloride}}

<u>Question</u><u> </u><u>3</u><u> </u><u>:</u>

• The answer above that question is perfect.

<u>Question</u><u> </u><u>4</u><u> </u><u>:</u>

1 atom → Mono. But it is highly recommended to ignore it

2 atoms → DI

3 atoms → TRI

4 atoms → TETRA

5 atoms → PENTA ( such as pentaoxide )

7 atoms → HEPTA ( such as heptaoxide )

<u>Question</u><u> </u><u>5</u><u> </u><u>and</u><u> </u><u>6</u><u>:</u>

Are perfectly answered.

5 0
3 years ago
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