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zimovet [89]
4 years ago
5

Please help me with this question

Chemistry
1 answer:
nikdorinn [45]4 years ago
8 0

Answer:

a) 974.3 dag

Explanation:

1 kg=100 dag

9.743kg= 9.743*100= 974.3 dag

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How many joules in a calorie
Tanya [424]

Answer:

4184

Explanation:

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4 years ago
1. By means of orbital diagrams, write down the
Dvinal [7]

Answer:

a) 1s22s22p63s1

b) 3s² 3p¹

c) 1s22s22p63s23p3

d) 3s² 3p⁵

e) 3s2

f) 1s22s22p63s23p2

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h) 3s² 3p⁶

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3 years ago
Whether a material is magnetic or not depends on what
Inessa05 [86]
It depends on what the material is.

3 0
3 years ago
What is the total number of atoms in 3.0 molecules of propanone, CH3COCH3? (Avogadro’s constant = 6 x 1023 mol-1)
BigorU [14]

Answer:

1.81 x 10²⁴atoms

Explanation:

Given parameters:

Number of molecules  = 3 moles

Unknown:

Number of atoms = ?

Solution:

To solve this problem, we are going to use the mole concept.

   1 mole of any substance contains 6.02 x 10²³ atoms

 So

   3 mole of propanone will contain 3 x  6.02 x 10²³ atoms  = 1.81 x 10²⁴atoms

4 0
3 years ago
A sample of o2 gas (2.0 mmol) effused through a pinhole in 5.0 s. it will take __________ s for the same amount of co2 to effuse
s344n2d4d5 [400]
Answer is: 5,9.
Effusion is leakage of gas through a small hole. Gases with a lower molecular mass effuse more speedy than gases with a higher molecular mass. R<span>elative rates of effusion is related to the molecular mass.
</span>M(O₂) = 32g/mol.
M(CO₂) = 44g/mol.
t₁ = 5s.
t₂ = ?
t₂/t₁ = √(M(CO₂)/M(O₂)).
t₂ = 1,17·5s = 5,9s.

8 0
4 years ago
Read 2 more answers
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