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3 years ago

12

List a homogeneous material that is not a pure substance

1 answer:

Marysya12 [62]3 years ago

8 0

Answer:

iron, steel, and water

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Naturally occurring boron has an atomic weight of 10.811. Its principal isotopes are 10B and 11B. Part A What is the abundance (

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Answer:

10B has 18.9%

11B has 81.1%

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4 years ago

A student wants to compare how easily a metal and a plastic spoon of the same temperature can transfer thermal energy. Which of

Artist 52 [7]

Measure the effort required to bend each spoon.

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3 years ago

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kumpel [21]

Answer:

0.17325 moles per liter per second

Explanation:

For a first order reaction;

in[A] = in[A]o - kt

Where;

[A]= concentration at time t

[A]o = initial concentration

k= rate constant

t= time taken

ln0.5 =ln1 - 2k

2k = ln1 - ln0.5

k= ln1 - ln0.5/2

k= 0 -(0.693)/2

k= 0.693/2

k= 0.3465 s-1

Rate of reaction = k[A]

Rate = 0.3465 s-1 × 0.50 mol/L

Rate = 0.17325 moles per liter per second

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3 years ago

6. Салыстырып

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Answer:

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Explanation:

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3 years ago

Does a high melting point mean the substance will melt faster or slower?

user100 [1]

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slower...............

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