Which barium salts is most insoluble in water?

Answers

Answer 1

Answer: Barium salts are mostly insoluble and toxic.

Example : Barium chloride , barium hydroxide, barium carbonate,barium sulfate.

hope this helps!

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The type of bond between atoms of potassium and chloride in a crystal of potassium chloride a. hydrogen bond
b. ionic bond
c. polar covalent bond
d. pure covalent bond
e. metallic bond

Answers

It's an ionic bond because potassium is a metal and chlorine is a non-metal so the potassium donates an electron to the chlorine and so the potassium becomes a positive ion and the chlorine becomes a negative chloride ion. Opposite ion charges attract so an ionic lattice is formed.

The temperature at the point of intercept of the plotted data with the Temperature axis is:600°C
-273°C
-160°C
50°C

Answers

Answer: The temperature at the point of intercept is -273°C.

Explanation: Intercept is a point on a graph which crosses the x and y axes.

Here, The X-axis represents Temperature in °C and Y-axis represents the Volume in mL.

On X-axis, the major division is 100 and minor division is 10. The slope intercepts the X-axis at third minor division from the origin. Hence, the temperature of intercept corresponds to -273°C.

An axis is a line of numbers in a graph. The intercept is where a line of data and axis intersect, which if you look at the purple line and the temp. axis, is around -273 C.

2MgO à 2Mg + O2 is an example of a _________ chemical reaction.a. synthesis
b. combustion
c. replacement
d. decomposition

Answers

Answer:

D. decomposition

Explanation:

Synthesis reaction occurs when two elements or compounds react to originate a new one:

A + B ⇒ C

Combustion occurs when a fuel reacts with oxygen to form CO₂ and water:

A + O₂ ⇒ CO₂ + H₂O

Replacement reaction can be simple or double. Simple occurs when a simple element replaces others in a compound:

A + BC ⇒ B + AC

Double occurs when two compounds replace elements between them:

AB + CD ⇒ AC + BD

Decomposition reaction occurs when a compound originates two or more compounds

A ⇒ B + C

So, the reaction given is a decomposition chemical reaction.

2MgO → 2Mg + O2 is an example of a decomposition chemical reaction. The answer is letter D. It is not a replacement reaction because no other compound is involved. It is not a combustion reaction because no oxygen is involved.

___ measures how acidic or basic a substance is

Answers

pH is the measure of how acidic or basic a substance is.

Temperature and kinetic energy have a relationship.

Answers

Answer:

$\boxed {\boxed {\sf Temperature=Average \ kinetic \ energy}}$

Explanation:

Temperature is also known as the average kinetic energy in a substance.

If there is an absence of heat in a substance, the particles move slower and the kinetic energy decreases. The temperature will be lower, because there is less kinetic energy.

If heat is present or applied, the particles move more, so kinetic energy increases. The temperature will be higher, since there is more kinetic energy.

So, the relationship is: temperature is the measure of average kinetic energy.

Answer:

DIRECT

Explanation:

Four processes that change rock from one type to another.

Answers

Erosion
waethring
deposition
pressure or heat
all of this can change the form of rock to another

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