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3 years ago

When matter heats up, dose the molecules close together?

2 answers:

8 0

Yes because when they heat up you sweat, and when they cool down they would probably separated because you are at your normal temperate

Dennis_Churaev [7]3 years ago

6 0

Ok don't look at the bottom answer, that's incorrect. When matter heats up, molecules start to separate. That's why gas has no physical form, unlike solids. Ice, for example, is solid, but when it heats up, the molecules strat to move apart and become a liquid and then a gas. Hope I helped!

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What kind of reaction is the "water-splitting" reaction

GarryVolchara [31]

Answer:

Water splitting is the chemical reaction in which water is broken down into oxygen and hydrogen: 2 H2O → 2 H2 + O. Efficient and economical photochemical water splitting would be a technological breakthrough that could underpin a hydrogen economy.

Explanation: 2 H2O → 2 H2 + O.

4 0

3 years ago

The sample concentration was measured at 50mg/ml. The loading concentration needs to be 10mg/ml. The final volume needs to be 25

Svet_ta [14]

Answer:

a) $V_1=5ul$

b) $v=20ul$

Explanation:

From the question we are told that:

initial Concentration $C_1=50mg/ml$

Final Concentration $C_2=10mg/ml$

Final volume needs $V_2 =25ul$

Generally the equation for Volume is mathematically given by

$C_1V_1=C_2V_2$

$V_1=\frac{C_1V_1}{C_2}$

$V_1=\frac{10*25}{50}$

$V_1=5ul$

Therefore

The volume of buffer needed is

$v=V_2-V_1\\\\v=25-5$

$v=20ul$

3 0

3 years ago

Your family is planning a trip to South America for Winter Break. Describe what type of clothes you

nata0808 [166]

Answer:

okey if I'm going on south America for the winter break i would basically pack baggy clothes ,sweater,jackets,wollen hats,wollen clothes,socks,shoes,scarf,heavy and wollen one thats all ig

6 0

1 year ago

What is oxidation number

MariettaO [177]

Antimony also forms trihalides and pentahalides, such as SbF3 , where its oxidation state is +3, and SbF5 , where its oxidation state is +5

7 0

3 years ago

How many electrons does the isotope helium-5 have

baherus [9]

Answer:

two electrons.

Explanation:

Helium-5, like all other helium isotopes, has two protons and two electrons. Its different from the others in the fact that it has three neutrons. It is one of the unstable isotopes, having a half-life of significantly less than a picosecond (a trillionth of a second). your welcome!!

6 0

3 years ago