3 years ago

Which term describes the composition of matter shown in Figure E?

Chemistry

1 answer:

elena-14-01-66 [18.8K]3 years ago

5 0

Answer:

Figure E is a compound

Explanation:

Compounds are constructed of 2 different elements

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Heating by direct contact between particles is called ____________

nataly862011 [7]

Answer:

conduction

Explanation:

Conduction is the transfer of heat between substances that are in direct contact with each other. ... Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more. These molecules then bump into nearby particles and transfer some of their energy to them.

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2 years ago

How much heat is needed to raise the temperature of water with mass of 27.0 g at 20.0°C to 45.0°C?

ohaa [14]

Answer:

2835 J

Explanation:

Take the specific heat capacity of water as 4.2 J/ g°C.

Energy (heat) = mass x specific heat capacity x change in temperature

(E= mcΔT)

E = 27 x 4.2 x (45-20)

E = 2835 J

7 0

3 years ago

If you have 10,000 grams of a substance that decays with a half-life of 14 days, then how much will you have after 56 days?

Crank

Answer: 625 grams

Explanation:

14 goes into 56, 4 times.

10,000÷2=5,000 - first half life

5,000÷2=2,500 - second half life

2,500÷2=1,250 - 3rd half life

1,250÷2= 625 - 4th half life

Note: don't type "grams" after 625, just type "625".

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2 years ago

The International Union of Chemistry (IUC) developed a specific set of rules for chemists to follow. What were these rules calle

vampirchik [111]

im just seeing something

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3 years ago

Read 2 more answers

How does H3PO ionize in water ?

Nonamiya [84]

Answer:

H3PO4 + H2O ↔ $H^{+}$ + $H2PO4^{-}$

Explanation:

HNO3 → NO2 + H2O + O2

H2SO4 → SO3 + H2O + O2

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3 years ago