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luda_lava [24]
3 years ago
15

Please help me! Physical change involves a change in composition. True or False

Chemistry
1 answer:
Brums [2.3K]3 years ago
3 0

Answer:

FALSE!!

Explanation:

Physical changes occur when objects or substances undergo a change that does NOT change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combines or break up to form new substances.

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Is iornIInitrate ionic or covalent
kondaur [170]

Answer:

Iron (II) nitrate is ionic compound

Explanation:

Formula:

Fe(NO₃)₂

Iron (II) nitrate is ionic compound.

Its molecular mass is 179.85 g/mol.

NO⁻₃ is anion while Fe⁺² is cation.

Iron loses its two electron which is accepted by nitrate.

Its molecular formula can be written as FeN₂O₆.

Its color is pale green.

Its melting point is 333.65 K.

It is para magnetic compound.

it is mostly present in non hydrated form.

It is also known as ferric nitrate.

It is used to form sodium amide.

Its is also used catalyst.

7 0
3 years ago
Pollen is transferred from the stamen of one flower to the stigma of another. What has occurred?
Digiron [165]
Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species. Self-pollination occurs in flowers where the stamen and carpel mature at the same time, and are positioned so that the pollen can land on the flower's stigma.
3 0
3 years ago
Read 2 more answers
Sugar costs $0.98/kg. 1 metric ton=1000 kg. How many metric tons of sugar can
EastWind [94]

Answer:

0.35714 Metric ton

Explanation:

350 / 0.98 = 357.1 ----------A

to get the answer on metric ton divide (a) by 1000

357.14/1000= 0.357

7 0
3 years ago
A chemical reaction can theoretically produce 1375.5 grams of product , but in actuality 112.9 grams are product . Which is the
zalisa [80]

Answer:

8.20 % → Percent yield reaction

Explanation:

To find the percent yield of reaction we apply this:

(Produced yield / Theoretical yield) . 100 = %

Produced yield = 112.9 g

Theoretical yield = 1375.5 g

We replace → (112.9g / 1375.5 g) . 100

8.20 % → Percent yield reaction

3 0
3 years ago
5. I have a mixture of salt, water,
dolphi86 [110]

Iron is left in the filter and salt solution (salt and water) passes into the cup.

Hope it helps

7 0
3 years ago
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