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Ainat [17]
4 years ago
13

What's compound streak mean in science

Chemistry
1 answer:
Marysya12 [62]4 years ago
5 0
Streak is the color a solid substance leaves behind when it is used to scratch a white porcelain tile. This is often different than the apparent color of the substance upon first visual examination, and it is a more accurate way to identify a substance (usually rocks and minerals) because while external color often varies from sample to sample, streak color is consistent.
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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
Draw a diagram (develop a model) that shows what happens when warm water mixes with cold water in the ocean. Use your model to e
Leokris [45]

Ocean currents determine the various directions of wind movement.

<h3>What is ocean current?</h3>

Ocean currents are caused by differences in density as well as the temperature of the moving winds across the ocean. In the ocean, warm water is found at the top while cooler water occurs far below.

Warm ocean currents originate near the equator and move towards the poles. The ocean currents control the direction of winds in an area.

Learn more about ocean currents: brainly.com/question/20823678

7 0
2 years ago
At 25 ∘ C , the equilibrium partial pressures for the reaction 3 A ( g ) + 4 B ( g ) − ⇀ ↽ − 2 C ( g ) + 3 D ( g ) were found to
VMariaS [17]

<u>Answer:</u> The standard Gibbs free energy of the given reaction is 6.84 kJ

<u>Explanation:</u>

For the given chemical equation:

3A(g)+4B(g)\rightleftharpoons 2C(g)+3D(g)

The expression of K_p for above equation follows:

K_p=\frac{(p_C)^2\times (p_D)^3}{(p_A)^3\times (p_B)^4}

We are given:

(p_A)_{eq}=5.70atm\\(p_B)_{eq}=4.00atm\\(p_C)_{eq}=4.22atm\\(p_D)_{eq}=5.52atm

Putting values in above expression, we get:

K_p=\frac{(4.22)^2\times (5.52)^3}{(5.70)^3\times (4.00)^4}\\\\K_p=0.0632

To calculate the equilibrium constant (at 25°C) for given value of Gibbs free energy, we use the relation:

\Delta G^o=-RT\ln K_{eq}

where,

\Delta G^o = standard Gibbs free energy = ?

R = Gas constant = 8.314 J/K mol

T = temperature = 25^oC=[273+25]K=298K

K_{eq} = equilibrium constant at 25°C = 0.0632

Putting values in above equation, we get:

\Delta G^o=-(8.314J/Kmol)\times 298K\times \ln (0.0632)\\\\\Delta G^o=6841.7J=6.84kJ

Hence, the standard Gibbs free energy of the given reaction is 6.84 kJ

6 0
4 years ago
Draw the model on the picture below and read the question carefully
seraphim [82]
Me tooo ask ur dad that’s wat I did
3 0
3 years ago
Why are free radicals unstable<br> atoms and how can they harm our bodies?
horsena [70]

Answer:

Explanation:

Free radicals unstable atoms because it can cause damage cells, as well as causing illness and aging, which means that it can cause harm into our bodies because it damages the DNA and the lipids which is also known as fatty acids

8 0
3 years ago
Read 2 more answers
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