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umka2103 [35]
3 years ago
7

What mass of naturally occurring uranium is closer to 238 u , 235 u or 234 u?

Chemistry
1 answer:
Liono4ka [1.6K]3 years ago
7 0
Uranium<span> (</span>92U<span>) is a </span>naturally occurring<span> radioactive element that has no stable isotopes but two primordial isotopes (</span>uranium-238<span> and </span>uranium-235<span>) that have long half-life and are </span>found<span> in appreciable quantity in the Earth's crust, along with the decay product </span>uranium-234<span>.</span>
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The Surface of Earth is changing slowly<br> over time.A.False<br> B.true<br> Previous
oksian1 [2.3K]

Answer:

true

Explanation:

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3 years ago
An electron is moving northward in a magnetic field. the magnetic force on the electron is toward the northeast. what is the dir
sweet-ann [11.9K]
The direction of the magnetic field would be going up.
8 0
3 years ago
CS2 (s) + 3 O2 (g) → CO2 (g) + 2 SO2 (g)
Natasha_Volkova [10]

Answer:

2.067 L ≅ 2.07 L.

Explanation:

  • The balanced equation for the mentioned reaction is:

<em>CS₂(g) + 3O₂(g) → CO₂(g) + 2SO₂(g),</em>

It is clear that 1.0 mole of CS₂ react with 3.0 mole of O₂ to produce 1.0 mole of CO₂ and 2.0 moles of SO₂.

  • At STP, 3.6 L of H₂ reacts with (?? L) of oxygen gas:

It is known that at STP: every 1.0 mol of any gas occupies 22.4 L.

<u><em>using cross multiplication:</em></u>

1.0 mol of O₂ represents → 22.4 L.

??? mol of O₂ represents → 3.1 L.

∴ 3.1 L of O₂ represents = (1.0 mol)(3.1 L)/(22.4 L) = 0.1384 mol.

  • To find the no. of moles of SO₂ produced from 3.1 liters (0.1384 mol) of hydrogen:

<u><em>Using cross multiplication:</em></u>

3.0 mol of O₂ produce → 2.0 mol of SO₂, from stichiometry.

0.1384 mol of O₂ produce → ??? mol of SO₂.

∴ The no. of moles of SO₂ = (2.0 mol)(0.1384 mol)/(3.0 mol) = 0.09227 mol.

  • Again, using cross multiplication:

1.0 mol of SO₂ represents → 22.4 L, at STP.

0.09227 mol of SO₂ represents → ??? L.

∴ The no. of liters of SO₂ will be produced = (0.09227 mol)(22.4 L)/(1.0 mol) = 2.067 L ≅ 2.07 L.

8 0
4 years ago
Which type of nuclear decay is the radioactive isotope fe2659 likely to undergo?
jekas [21]

Beta minus decay will be obtain in the radio-active isotope of Fe-26 power 59.

Whenever there are too many protons or even neutrons in a nucleus, one of the protons and neutrons will turn into the other, which is known as beta decay. During beta minus decay, a neutron transforms into a proton, electron, as well as antineutrino.

Fe_{26} ^{59} → Co_{27} ^{59} +\beta_{1}  ^{0}

It can be seen that after the beta minus decay Fe changes into Co.

In beta decay , decrease in atomic number by one unit Fe atom get converted into Co atom.

Neutron-rich nuclei often decay by producing both an electron and an antineutrino.

Therefore, Beta minus decay will be obtain in the radio-active isotope of Fe-26 power 59.

To know more about  radio-active isotope

brainly.com/question/4421649

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3 0
2 years ago
If a particular ore contains 58.5% calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg of phosph
alina1380 [7]
Calcium Phospate formula: Ca3(PO4)2

Atomic weight:
Ca = 40  ; P = 31 ; O = 16

Ca3  = 40 * 3 = 120
P = 31
O4 = 16 * 4 = 64
(PO4)2 = (31 + 64) * 2 = 95 * 2 = 190

Ca3(PO4)2 = 120 + 190 = 310 g/mol

31/310 = 10% P in the calcium phospate

1.00kg * 1000 g/kg = 1000 g of phosphorus.

1000 g / 10% = 10,000 g of calcium phosphate

10,000 g / 58.5% = 17,094 grams of ore.

The minimum mass of the ore should be 17,094 grams or 17.094 kg.
5 0
3 years ago
Read 2 more answers
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