Uranium-235 decays to what stable daughter isotope by losing 7 alpha particles?

1 answer:

Elena-2011 [213]3 years ago

4 0

For a radioactive decay, it should be that the mass number and the atomic number of the reactant and the product side are equal in value. Alpha particles are He-2 particles, therefore, the daughter isotope would be platinum-221

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The molecular geometry of the left-most carbon atom in the molecule below is __________.

BlackZzzverrR [31]

The answer is tetrahedral.

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4 years ago

2 H2(g) + O2(g) → 2 H2O(g)

alexgriva [62]

Answer:

77 L of water can be made.

Explanation:

Molar mass of $O_{2}$ = 32 g/mol

So, 55 g of $O_{2}$ = $\frac{55}{32}$ mol of $O_{2}$ = 1.72 mol of $O_{2}$

As hydrogen is present in excess amount therefore $O_{2}$ is the limiting reagent.

According to balanced equation, 1 mol of $O_{2}$ produces 2 mol of $H_{2}O$ .

So, 1.72 mol of $O_{2}$ produce $(2\times 1.72)$ mol of $H_{2}O$ or 3.44 mol of $H_{2}O$ .

Let's assume $H_{2}O$ gas behaves ideally at STP.

Then, $P_{H_{2}O}.V_{H_{2}O}=n_{H_{2}O}.R.T$ , where P, V, n, R and T represents pressure, volume, no. of moles, gas constant and temperature in kelvin scale respectively.