A pressure of 655 mm hg is equal to how many atmospheres

Answers

Answer 1

Answer:

Answer:

0.861842

Explanation:

One atm. equals 760.0 mm Hg, so there will be a multiplication or division based on the direction of the change. Example #1: Convert 0.875 atm to mmHg. Solution: multiply the atm value by 760.0 mmHg / atm.

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Which one of this is endothermic and which one is exothermic?CH2+O2 -> CO2+H2O+Energy
CaCo+Energy -> CaCo+CO2

Answers

The first one is exothermic because energy is a reactant, the second formula is endothermic

Identity and describe the sequence of dissolving

Answers

let hope this helps if you put salt in the water the water (eats) as i would say and breaks into pieses until its fully dissolved

:)

What are the sum of all forces acting on the object called?

Answers

That would be called the resultant force or net force.

In order for substances to conduct electricity their ions must be

Answers

Answer:

not a solid/ dissolved in water/ through melting because the ion's electrons have to be able to move freely and they can't do this when they are solids. they can occur

Final answer:

In order for substances to conduct electricity, their ions must be mobile and capable of carrying a charge. Most commonly, substances conduct electricity by having freely mobile electrons or dissolved ions in their atomic structure.

Explanation:

In order for substances to conduct electricity, their ions must be mobile and capable of carrying a charge. Most commonly, substances conduct electricity by having freely mobile electrons or dissolved ions in their atomic structure.

For example, in metals, some electrons are not bound to individual atoms, allowing them to move through the material and carry a charge. Salty water and other conductive materials contain dissolved ions that can also move and conduct electricity.

In contrast, insulators like glass have bound electrons and ions that cannot move easily, making them poor conductors of electricity.

Learn more about electricity conduction here:

brainly.com/question/32985304

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I will give brainliest!! Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationshops among reactants and products in chemical reactions?

a
quantitative analysis
b
entrophy
c
chemical kinetics
d
stoichiomentry

Answers

That would be D Stoichiometry.

Answer:

Explanation:

A 93-L sample of dry air is cooled from 145 oC to -22 oC at a constant pressure of 2.85 atmospheres). What is the final volume?

Answers

Answer:

56 L

Explanation:

We're dealing with a gas in this problem. We may, therefore, apply the ideal gas law for this problem:

$pV = nRT$

We now that we have a constant pressure. Besides, R, the ideal gas law constant, is also a constant number. Let's rearrange the equation so that we have all constant variables on the right and all changing variables on the left:

$(V)/(T) = (nR)/(p) = const$