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2 years ago

Which particle has a mass of 1.67 x 10-24 g and a charge of zero? A B electron proton neutron

Chemistry

1 answer:

Archy [21]2 years ago

5 0

Answer:

neutron

Explanation:

both protons and neutrons have the same mass..but charge of the proton is +1

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What is in with those numbers? H2O?

vlabodo [156]

Answer:

hydrogen atom and oxygen atom

8 0

2 years ago

g A 500. mL solution contains 0.665 M NaC2H3O2 and 0.475 M HC2H3O2. What mass of HCl in grams needs to be added for the solution

77julia77 [94]

Answer:

7.38g HCl

Explanation:

Using H-H equation for acetic buffer:

pH = pKa + log [NaC2H3O2] / [HC2H3O2]

<em>Where pKa is -log Ka = 4.74 and [] could be taken as moles of each compound.</em>

The initial moles of each specie is:

[NaC2H3O2]:

0.500L * (0.665mol/L) = 0.3325moles

[HC2H3O2]:

0.500L * (0.475mol/L) = 0.2375 moles

That means total moles are:

[NaC2H3O2] + [HC2H3O2] = 0.57 moles <em>(1)</em>

And solving H-H equation for a pH of 4.21:

4.21 = 4.74 + log [NaC2H3O2] / [HC2H3O2]

0.29512 = [NaC2H3O2] / [HC2H3O2] <em>(2)</em>

Replacing (1) in (2):

0.29512 = 0.57mol - [HC2H3O2] / [HC2H3O2]

0.29512 [HC2H3O2] = 0.57mol - [HC2H3O2]

1.29512 [HC2H3O2] = 0.57mol

[HC2H3O2] = 0.44 moles

The HCl reacts with NaC2H3O2 producing HC2H3O2, that means you need to add:

0.44 moles - 0.2375 moles =

0.2025 moles of HCl

Using molar mass of HCl (36.45g/mol), to convert these moles to grams:

0.2025 moles * (36.45g/mol) =

8 0

3 years ago

Renaldo wants the students in his class to demonstrate the arrangement of the particles in a solid. What should he tell the stud

Tatiana [17]

Oh okie so cute ☺️ and queen lol I

3 0

3 years ago

Read 2 more answers

15.0 g of cream at 16.4 °C are added to an insulated cup containing 100.0 g of coffee at 86.5 °C. Calculate the equilibrium temp

Marta_Voda [28]

115 grams total

15/115= 13%

109/115= 87%

.13x 16.4= .277

.87x 86.5= 75.255

75.255+.277= 75.532 deg C
or 75.5 as 3 significant digits

7 0

3 years ago

A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder

Elina [12.6K]

Answer:

The answers to the questions are as follows

The temperature of the water bath goes up
The piston moves out
Heat flows out of the gaseous mixture
173.kJ flows out of the system

Explanation:

From the question, it is noted that 173.kJ of heat flows out of the system into the insulated water bath therefore the temperature of the water bath goes up

as seen in the relation ΔH = m·c·ΔT

Where ΔH heat measured by temperature rise ΔT of a given mass of water m of specific heat capacity of 4.2 J/g°C

The amount of heat measured from previous experiment is more than the heat from the present reaction therefore since in the present reaction is constant pressure and from the first law of thermodynamics Energy can neither be created nor destroyed, the balance heat will be transformed to work evidence in the piston moving out

ΣH = Q + W where

w = P × ΔV = P × (P₂ - P₂)

Heat flows out of the gaseous mixture and is sensed from the rise in the temperature of the water bath

173.kJ flows out of the system

3 0

3 years ago

Which particle has a mass of 1.67 x 10-24 g and a charge of zero? A B electron proton neutron​

Which particle has a mass of 1.67 x 10-24 g and a charge of zero? A B electron proton neutron