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3 years ago

Pleaseee, PLEASEEEEEE I need HELPP with this

Chemistry

2 answers:

weqwewe [10]3 years ago

4 0

The pictures to the right show two samples of substance X. Answer the questions below about the intensive and extensive properties of substance X. You may assume that both cubes are solid (that is, not hollow inside).

Sample A melts at the same temperature as sample B.

Sample B has a larger mass than sample A.

Sample A has a smaller volume than sample B.

If sample A floats in water, sample B . will also float in water

If sample B is attracted to a magnet, sample A will also be attracted to a magnet.

Savatey [412]3 years ago

3 0

Explanation:

Melting is defined as a change in which a solid changes into liquid state.

For example, an ice cube will melt at room temperature whereas a large ice block will also melt at room temperature.

Therefore, sample A melts at the same temperature as sample B.

Since sample A is small in size whereas sample B is larger in size. Hence, sample B has a larger mass than sample A. Also, sample A has smaller volume than sample B.

On the other hand, floating ability of a substance depends on its density. Therefore, being sample of same substance if sample A floats in water then sample B will also float in water.

Also, it is given that sample B is attracted to a magnet therefore, sample A will also be attracted to a magnet.

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10. Copper(i) bromide reacts with magnesium metal: 2 CuBr + Mg → 2 Cu + MgBrz

velikii [3]

Answer:

72.6 grams

Explanation:

I got this answer through stoichiometry. For every 1 mole of Mg, 2 moles of CuBr are consumed. Because of this, multiply the moles of Mg by 2. Then, convert moles to grams.

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3 years ago

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A 0.860-kg sample of tin (with a specific heat of 210.0 J/(kg x K)) is heated to 525 K and then placed in 1.20 kg of water that

musickatia [10]

Answer: 310K

Explanation: I got it right

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3 years ago

Please help for brainliest <br><br><br> Don’t skip and don’t answer if u don’t know.

Rainbow [258]

Answer:

burning wood be a chemical change because it wouldn’t be able to go back to its original form. A physical change would be a broken pencil. The pencil is still a pencil, it’s just a physical change.But if it were burned it would be a chemical change.

Explanation:

8 0

3 years ago

effect. RbClO(s) → Rb+(aq) + ClO−(aq) HClO(aq) + H2O(l) equilibrium reaction arrow H3O+(aq) + ClO−(aq) The degree of dissociatio

Lemur [1.5K]

Explanation:

Common ion effect is defined as the effect which occurs on equilibrium when a common ion (an ion which is already present in the solution) is added to a solution. This effect generally decreases the solubility of a solute.

Equilibrium reaction of strontium sulfate and sodium sulfate follows the equation:

$RbClO(s)\rightarrow Rb^{+}(aq.)+ClO^{-}(aq.)$

$HClO(aq)+H_2O\rightleftharpoons H_3O^+(aq.)+ClO^{-}(aq.)$

According to Le-Chateliers principle: If there is any change in the variables of the reaction, the equilibrium will shift in the direction in order to minimize the effect.

In the equilibrium reactions, hypochlorite ion is getting increased on the product side, so the equilibrium will shift in the direction to minimize this effect, which is in the direction of hydrogen hypochlorite.

Thus, the addition hypochlorite ions will shift the equilibrium in the left direction.

The dissociation of hydrogen hypochlorite is suppressed due to the common ion effect.

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3 years ago

Given the following list of densities, which materials would float in a molten vat of lead provided that they do not themselves

vampirchik [111]

Answer:

b. glass and charcoal

Explanation:

Step 1: Given data

Density of Pb: 11.4 g/mL

Density of Glass: 2.6 g/mL

Density of Au: 19.3 g/mL

Density of charcoal: 0.57 g/mL

Density of platinum: 21.4 g/mL

Step 2: Determine which material will float in molten lead

Density is an intrinsic property of matter. Less dense materials float in more dense materials. The materials whose density is lower than that of lead and will therefore float on it are glass and charcoal.

8 0

3 years ago