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2 years ago

GRADE 5 SCIENCE MYA-2020-2021

Chemistry

1 answer:

Elenna [48]2 years ago

5 0

Answer:

Test it with a blue light that is 45 cm away.

Explanation:

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The materials or compounds that are changed into a new compounds in a chemical reaction are know as

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Answer:

Reactants

Explanation:

They become known as reactants

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2 years ago

What is the molecular formula of Ferric Oxide with criss-cross method

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Answer: Fe2O3

Explanation: By applying crisscross method, the formula will be Fe2O3.

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1 year ago

The maximum CO2, concentration for natural CO2, cycles from over 800,000 years?

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Answer:

Is this a true or false thing?

Explanation:

In that case would be true

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2 years ago

The specific heat capacity of thallium is 0.128 J/gC. A sample of thallium weighing 32.9 g is heated from 49C to its melting poi

jeka94

Answer:

Thallium absorbed 1069.645 J heat to reach to its melting point.

Explanation:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Given data:

Mass of thallium = 32.9 g

specific heat capacity of thallium = 0.128 j/g. °C

Initial temperature = 49 °C

Final temperature = 303 °C

Solution:

Change in temperature = T₂- T₁

ΔT = 303 °C - 49 °C = 254 °C

Formula:

Q = m.c. ΔT

Q = 32.9 g ×0.128 j/g. °C × 254 °C

Q = 1069.645 J

Thallium absorbed 1069.645 J heat to reach to its melting point.

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2 years ago

The molecule below contains both an aldehyde and a ketone functional group. select only the carbonyl carbon atom of the aldehyde

4vir4ik [10]

Carbonyl compounds are those compounds in which carbon aton is doubly bonded to oxygen atom.
The hybridization of carbon and oxygen in carbonyl compounds is Sp². Folowing are examples of carbonyl compounds,

1. Ketones
2. Aldehydes
3. Carboxylic Acids
4. Acyl Halides
5. Amides
6. Esters
7. Anhydrides e.t.c
Result:
In given the structure the carbonyl groups are highlighted RED, as shown below.

7 0

3 years ago