Answer:
234 g
Explanation:
We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.
M_r: 22.99 58.44
2Na + Cl₂ ⟶ 2NaCl
Mass/g: 92.0
1. Calculate the <em>moles of Na
</em>
Moles Na = 92.0 × 1/22.99
Moles Na = 4.002 mol Na
===============
2. Calculate the <em>moles of NaCl
</em>
The molar ratio is 2 mol NaCl:2 mol Na.
Moles of NaCl = 4.002 × 2/2
Moles of NaCl = 4.002 mol NaCl
===============
3. Calculate the <em>mass of NaCl
</em>
Mass of NaCl = 4.002 × 58.44
Mass of NaCl = 234 g
You have to find how many moles of H2 has formed.
C+ H2O -> CO + H2
mole of carbon reacted = mass / molar mass = 34g/ 12g per mol = 2.83 mol
for every 1 mole of carbon will form 1 mole of H2
mole of hydrogen produced = 1* 2.83 = 2.83 mol
mass of hydrogen = mole * molar mass = 2.83 mol * (1*2) = 5.66g
Opposite pairs form ionic bonds, due to this the answer is D - Li and Br; They have unlike charges.
Answer:
b) beta decay
Explanation:
Beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminium is used to block the beta radiation
⁴₆C → ¹⁴₇N + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.
Answer:
molecules are the groups of atom bonding together , representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction