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Mkey [24]
3 years ago
15

3. How do you observe stuff?

Chemistry
2 answers:
mote1985 [20]3 years ago
8 0

Answer:

by looking at the and researching for super long

Explanation:

amid [387]3 years ago
8 0
By reaching or looking
You might be interested in
Chemical reactions
Troyanec [42]
D) produce new substances

Since chemical reactions don't only take place in living orgasim only. Also atoms can't be made or destroyed. And it occurs inside and outside living orgasim
Hope this helps u!!!
And good luck!!!
5 0
2 years ago
1.How many moles of each element are in 0.0250 mol of K 2 Cr O 4?
garik1379 [7]

Answer:

1. In 0.0250 moles of potassium chromate there are 0.05 moles of potassium , 0.025 moles of chromium and 0.1 moles of oxygen are present.

2. In 4.50 moles of ammonium carbonate there are 9 moles of ammonium ions and 4.5 moles of carbonate ions are present.

Explanation:

1.

Moles of potassium chromate = 0.0250 mol

Formula of potassium chromate = K_2CrO_4

1 mole of potassium chromate has 2 moles of potassium , 1 mole of chromium and 4 moles of oxygen.

Then in 0.0250 moles of potassium chromate:

Moles of potassium will be:

2\times 0.0250 mol= 0.05 mol

Moles of chromium will be:

1\times 0.0250 mol= 0.025 mol

Moles of oxygen will be:

4\times 0.0250 mol= 0.1 mol

2.

Moles of ammonium carbonate = 4.50 mol

Formula of ammonium carbonate =(NH_4)_2CO_3

1 mole of ammonium carbonate has 2 moles of ammonium ion and 1  mole of carbonate ion.

Then in 4.50 moles of ammonium carbonate:

Moles of ammonium ion will be:

2\times 4.50 mol= 9mol

Moles of carbonate ions will be:

1\times 4.50 mol= 4.5 mol

8 0
2 years ago
Which focuses on the composition of matter
riadik2000 [5.3K]
There is no info for anyone to answer this
3 0
3 years ago
A particle has a mass of 2 × 10-30 kg and an uncertainty in its velocity of 102 m/s. What is the minimum possible uncertainty in
notka56 [123]

m = mass of the particle = 2 x 10⁻³⁰ kg

Δv = uncertainty in velocity of the particle = 10² m/s

Δx = uncertainty in position of the particle = ?

h = plank's constant = 6.63 x 10⁻³⁴ J-s

uncertainty principle is given as

m Δx Δv ≥ h/(4π)

inserting the values

(2 x 10⁻³⁰) Δx (10²) ≥ (6.63 x 10⁻³⁴)/(4(3.14))

Δx ≥ 2.64 x 10⁻⁷ m

so minimum possible uncertainty is 2.64 x 10⁻⁷ m

3 0
3 years ago
How much heat is absorbed by 0.060 kg of copper when it is heated from 20.0°C to 80.0°C if the specific heat of copper is 385J/k
Elina [12.6K]

Answer:

its 1386J

Explanation:

7 0
3 years ago
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