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lisov135 [29]
3 years ago
10

Marie Curie discovered that an element called gave off atomic energy.

Chemistry
2 answers:
AlekseyPX3 years ago
6 0
She discovered with her husband Polonium and Radium (both radioactive elements).
Hope this helps :).
Fed [463]3 years ago
3 0
The element that she discovered was radium.
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What are the molar concentrations of the ion in 0.26m aluminum sulfate? For c(so4^2-)
Alex777 [14]

Answer:

0.78 M for SO₄²⁻

Explanation:

The chemical formula for aluminium sulfate is Al₂(SO₄)₃

So for a concentration of 0.26 M you have in solution 0.26 moles of Al₂(SO₄)₃ in 1 liter of solution.

But you have three times more sulfate ions SO₄²⁻ in solution, so the molar concentration for this ion will be:

0.26 × 3 = 0.78 M

3 0
4 years ago
Convert 533 cm/s to units of meters per minute. Show the unit analysis by dragging the conversion factors into the unit‑factor s
lukranit [14]

Answer:

319.8 m/min

Explanation:

533 cm/s

We can convert 533 cm/s to m/min by doing the following:

First, we shall convert 533 cm/s to m/s. This can be obtained as illustrated below:

Recall:

100 cm/s = 1 m/s

Therefore,

533 cm/s = 533 cm/s /100 cm/s × 1 m/s

533 cm/s = 5.33 m/s

Finally, we shall convert 5.33 m/s to m/min. This can be obtained as follow:

1 m/s = 60 m/min

Therefore,

5.33 m/s = 5.33 m/s / 1 m/s × 60 m/min

5.33 m/s = 319.8 m/min

Therefore, 533 cm/s is equivalent to 319.8 m/min

8 0
3 years ago
Solutions can only be separated by using distillation not filtration. Why can't a solution be filtered? Explain using the terms
garri49 [273]
<h2>Solutions</h2>

Explanation:

  • Solutions are formed when a solute gets dissolved in a solvent. The solid that gets dissolved is called solute whereas the liquid in which the solid gets dissolved is called the solvent. On dissolving,  the particles of the solute  gets incorporated between the inter-particle space of the solvent. This means that there is no significant difference between the particle size of solute and solvent. However the boiling points of solutions can differ significantly. This is the reason, the solutions cannot be separated by the method of filtration but by the method of distillation.
5 0
3 years ago
A skeleton chemical equation includes which of the following
Diano4ka-milaya [45]

Answer:

Explanation:

Skeleton equations are also known as unbalanced equations.

Eg I react Oxygen, Hydrogen and Chlorine and I get Water and Chlorine Gas

H2 + Cl2 = HCl

Left Side

H = 2

Cl = 2

Right Side

H = 1

Cl = 1

As you can see it's not balanced is skeleton equation.

3 0
4 years ago
Which of the following species has bonds with
Rzqust [24]
The species bonds with the most ionic character is the compound with elements that develop the higher electronegativity difference between each other.
the most ionic character had maximum EN.
EN is max for SiO2

hope this help
4 0
3 years ago
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