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3 years ago

13

Choose three physical properties that can be used to identify pure substances. (select all that apply.) melting point degree of

ionization heat of combustion boiling point density

1 answer:

ch4aika [34]3 years ago

5 0

Malleable ductile and sonorous

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The literature value of the atomic mass of an isotope of nickel is 57.9 g/mol. If a laboratory experimenter determined the mass

trapecia [35]

Answer:

17%

Explanation:

Given parameters:

Atomic mass of nickel isotope = 57.9g/mol

Experimental value of atomic mass = 59.6g/mol

Unknown:

Percentage error in the measurement.

Solution:

The percentage error shows how much uncertainty was introduced into a measurement. To calculate this, we simply use the expression below:

Percentage error = $\frac{Approximate atomic mass from expriment - actual atomic mass}{actural atomic mass} x 100$

Percentage error = $\frac{59.6-57.9}{57.9}$ x 100 = 17%

3 0

4 years ago

A typical person has an average heart rate of 75.0 beats/min. Calculate the following a)How many beats does she have in 7.0 year

hram777 [196]

Let us first convert years to minute.

7 years * (365 days / year) * (24 hours / day) * (60 minutes / hour) = 3,679,200 minutes

a. beats = 75.0 beats/min * 3,679,200 minutes

beats = 275,940,000 beats

Since the original given is 7.0 years (2 significant figures), therefore:

beats = 270,000,000 beats

b beats = 75.0 beats/min * 3,679,200 minutes

beats = 275,940,000 beats

Since the original given is 7.000 years (4 significant figures), therefore:

<span>beats = 275,900,000 beats</span>

5 0

3 years ago

Read 2 more answers

Harold Reese must choose between two bonds: Bond X pays $95 annual interest and has a market value of $905. It has 13 years to m

Serga [27]

Answer:

Explanation:

a)

current yield of bond x = annual interest/market value

current yield of bond x = 95/905

current yield of bond x = 10.50%

current yield of bond Z = annual interest/market value

current yield of bond Z = 85/910

current yield of bond Z = 9.34%

b)

Bond X should be selected based on current yield

c)

<u>Bond Z </u>

Approximate yield to maturity = (Annual Coupon + (Maturity value - Current price)/period)/ ( (Maturity value+ Current price)/2)

Approximate yield to maturity = (85+ (1000-910)/5)/((1000+910)/2)

Approximate yield to maturity = 10.79%

Exact yield to maturity = rate(nper,pmt,pv,fv)

Exact yield to maturity = rate(5,85,-910,1000)

Exact yield to maturity = 10.93%

d)

Yes , answer would changed between parts b and c of this question as A drawback of current yield is that it does not consider the total life of the bond .

8 0

3 years ago

Thyroid hormone contains the mineral thyroid hormone contains the ________.

erica [24]

Thyroid hormone contains the mineral iodine (option I). Details about thyroid hormone can be found below.

<h3>What is the thyroid hormone?</h3>

Thyroid hormone is the hormone produced by the thyroid gland of the body, which is a large butterfly-shaped endocrine gland situated on the front of the neck that produces various hormones.

The thyroid hormone is responsible for regulating metabolism, which controls the amount of calories burnt in a day.

One of the major minerals found in the thyroid is iodine. The thyroid gland absorbs iodine from the bloodstream, and then stores it to aid in the production of thyroid hormones.

Therefore, the thyroid hormone contains the mineral iodine.

Learn more about thyroid at: brainly.com/question/13856314

#SPJ1

8 0

2 years ago

What does the term organic mean in chemistry? natural containing carbon using no pesticides within the periodic table

dem82 [27]

The organic meaning in chemistry is natural containing carbon.

<u><em> Explanation</em></u>

The natural matter or compounds which contain carbon are referred to as organic compounds.

Example of organic compound is protein which are made up of amino acid.

Amino acid is made up of carbon, hydrogen oxygen and nitrogen atoms.

3 0

3 years ago

Read 2 more answers