Which element forms an ionic bond when combined with Cl

Answers

Answer 1

Answer: potassium or any other metals.

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which statement describes all chemical changes but not all physical changes a bubbles are produced b a new substance forms c phase changes occur D a color change occurs

Answers

The correct answer is:

B; A new substance forms.

Explanation:

A physical change, such as a state change or dissolving, does not produce a new substance, but an abundant change does. In a chemical reaction, the atoms and molecules that connect with each other are described as reactants. Chemical reactions happen when chemical bonds are broken and formed. If the molecules in a substance crash into each other with enough energy, some of the bonds in the molecules can break. The atoms can make new bonds with different atoms. A new substance forms.

B; A new substance forms.

A sample of gas has increased in temperature from 20° Celsius to 22° Celsius. Which of the following happens as the temperature of the gas goes up? The gas undergoes a phase change.
The velocity of the gas particles decreases.
The kinetic energy of the particles increases.
An exothermic reaction is more likely to occur.

Answers

The correct answer for this question is the statement 'the kinetic energy of the particles increases'. As the temperature of gas goes up, the kinetic energy of the particles increases because their velocities increase. This is because particles get excited and hit each other more - leading to increase in kinetic energy.

Answer: The kinetic energy of the particles increases.

Explanation:

Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:

$K=(3RT)/(2)$

From above, it is visible that kinetic energy is directly related to the temperature of the system. So, if temperature is increased, average kinetic energy of the system also increases.

Also the velocity of the particles also increase as $K.E=(1)/(2)* mv^2$ .

Given the balanced equation:4Fe(s) + 3O2(g) ==>2Fe2O3(s) + 1640 kJ
Which phrase best describes this reaction?
(1) endothermic with DH = +1640 kJ
(2) endothermic with DH = -1640 kJ
(3) exothermic with DH = +1640 kJ
(4) exothermic with DH = -1640 kJ

Answers

The answer is (4) exothermic with ΔH = -1640 kJ. The 1640 kJ energy is at the right side of equation means that it releases energy. The enthalpy change means the energy of production minus the energy of reactants. If it is exothermic, the ΔH < 0.

Calculate the number of grams of CH_3COOH in the vinegar.

Answers

when density in g/ml
9.86ml CH3COOH (X g/1ml) = g
1.049g/ml
9.86ml (1.049g/1ml) = 10.343 g
hope it helps

An increase in the surface area of reactants in a heterogeneous reaction will result in what?

Answers

It will result in an increase in the rate of rxn

What type of chemical reaction is happening here? 8Fe + S8 --> 8FeS

Answers

This is a synthesis reaction since you are taking two elements and creating one (opposite of decomposition). I think this might also classify as a redox reaction as well since it appears as if iron is being oxidized and sulfur is being reduced (iron is loosing electrons while sulfur is gaining electrons).

I hope this helps. Let me know if anything is unclear.

Other Questions

Alexis predicts that the size of a magnet affects its magnetic properties. She designs anexperiment using magnets of different sizes and paperclips to test her prediction. She takesthree magnets of different sizes (one small, one medium, and one large) and holds them overa container of paperclips to see how many are attracted. Her results are shown in the tablebelow.What should Alexis do next after examining her experimental results?

An emission Ray has a frequency of 5.10 x10^14 Hz. Given that the speed of light is 2.998 x10^8 m/s, what is the wavelength of the Ray?

The difference between a molecule and a compound is that a compound is made up of atoms from .A chemical change creates a new

the formula C=5/9 (F - 32) can be used to convert a temperature from degrees Fahrenheit to degrees Celsius. which of the following is closest In value to 5/9?