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2 years ago

Single-use earplugs require a professlonal fitting before they can be used.

Chemistry

2 answers:

Morgarella [4.7K]2 years ago

3 0

The answer is B) False

Marysya12 [62]2 years ago

3 0

Answer:

The answer is false

Explanation:

Because i am taking this safety test and i got that question right ong

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NEED HELP 14 points!!!

evablogger [386]

Answer: 45 moles H2O

Explanation: To solve for the moles of H2O in the reaction we will use the mole ratio of O2 and H2O based from the chemical equation which is 1 : 2

22.5 moles O2 x 2 moles H2O / 1 mole O2

= 45 moles H2O

5 0

3 years ago

Write a definition of isotope in your own words . Please help

mojhsa [17]

Isotopes are basically, different types of the same atom. Isotopes are atoms that have different neutron numbers but the same proton numbers.

3 0

3 years ago

Read 2 more answers

This graph represents a population of molecules in a gas versus the distribution of the average velocity(speed) of its molecules

pshichka [43]

Answer:

Part A

Given that the graph is symmetrical and bell shaped, the average kinetic energy is given by the midline of graph, which corresponds to the common speed of the highest number of the population

Part B

The formula for the average kinetic energy, K.E. = (3/2)·(R/NA)·T

Therefore, the part of the graph that indicates the temperature of the sample is the average kinetic energy. K.E.

Part C

At a lower temperature, the heat is less evenly distributed and we have the distribution T2 higher than T1

Please see the attached graph created with MS Visio

Explanation:

3 0

2 years ago

A lime has a [H+] concentration of 0.0120 M.<br><br> What is the pH of the lime? 3 sig figs

Novosadov [1.4K]

Answer: pH= 1.92

Explanation:

pH= -log[H+]

pH= -log[0.012]

= 1.92

4 0

3 years ago

Easons for the dense packing in metals <br>

Firdavs [7]

Explanation:

Typically, only one element is present, so all atomic radii are the same. -Metallic bonding is not directional. -Nearest neighbor distances tend to be small in order to lower bond energy.

7 0

3 years ago