Answer:
(a). strontium iodide.
(b). SrI2.
Explanation:
This question wants to test our knowledge on qualitative part of chemistry practical.
The first part is flame test which is a physical test. The flame test that was done on the com gave red flame.
Deduction: This confirms the presence of Strontium and Calcium.
The next thing is the chemical tests.
(1). Unknown + ammonium carbonate: gives white precipitate (ppt.).
Deduction: presence of Calcium and Strontium ions
(2). Unknown + Ammonium phosphate - white ppt.
Deduction: presence of Calcium and Strontium ions.
(3). Unknown sample + ammonium sulfate - white ppt.
Deduction: presence of Strontium ion confirmed.
(3). Halide test: purple hexane layer.
Deduction: shows the presence of Iodine.
Therefore, the final conclusion can be made as;
(a). The name of the chemical compound is strontium iodide.
(b). The chemical formula for the compound is SrI2.
A dipole-dipole interaction is a force of attraction between slightly positive hydrogen on one molecule and a slightly negative atomon another molecule while ion-dipole interaction is force between an ion and a polar molecule
Answer:
Contrasting Nuclear Fission and Nuclear Fusion
Nuclear FissionByproducts of the reaction: Fission produces many highly radioactive particles.Conditions: Critical mass of the substance and high-speed neutrons are required.Energy Requirement: Takes little energy to split two atoms in a fission Explanation:
0.25 mols SO₂ x 64.058 g SO₂/ 1 mol SO₂ = 16.0145 g SO₂
molar mass of SO₂: 64.058 g
answer: 16 grams of SO₂ (2 sig figs)
check the question to see if its asked for a specific unit for mass (grams or kilograms, if they asked for kiligrams then convert 16 grams to kilograms by dividing it by 1000)
