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3 years ago

Which statement describes how chemical formulas, such as H2O, represent compounds

Chemistry

2 answers:

grandymaker [24]3 years ago

5 0

Answer:

Which statements describe how chemical formulas, such as H2O, represent compounds? ... They show the elements that make up a compound. They show the types of atoms that make up a molecule. They show the number of each type of atom in a molecule.

lions [1.4K]3 years ago

5 0

Answer: B

Explanation:

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An average reaction rate is calculated as the change in the concentration of reactants or products over a period of time in the

Sauron [17]

Answer:

a) 0.000112 M/s is the average reaction rate between 0.0 seconds and 1500.0 seconds.

b) 0.00011 M/s is the average reaction rate between 200.0 seconds and 1200.0 seconds.

c) Instantaneous rate of the reaction at t=800 s :

Instantaneous rate : $\frac{0.031 M}{800.0 s}=3.875\times 10^{-5} M/s$

Explanation:

Average rate of the reaction is given as;

$R_{avg}=-\frac{\Delta A}{\Delta t}=\frac{A_2-A_1}{t_2-t_1}$

a.) The average reaction rate between 0.0 s and 1500.0 s:

At 0.0 seconds the concentration was = $A_1=0.184 M$

$t_1=0.0s$

At 1500.0 seconds the concentration was = $A_2=0.016 M$

$t_2=1500 s$

$R_{avg]=-\frac{0.016 M-0.184 M}{1500.0 s-0.0 s}=0.000112 M/s$

0.000112 M/s is the average reaction rate between 0.0 seconds and 1500.0 seconds.

b.) The average reaction rate between 200.0 s and 1200.0 s:

At 0.0 seconds the concentration was = $A_1=0.129 M$

$t_1 =200.0 s$

At 1500.0 seconds the concentration was = $A_2=0.019M$

$t_2=1200 s$

$R_{avg]=-\frac{0.019 M-0.129M}{1200.0s-200.0s}=0.00011 M/s$

0.00011 M/s is the average reaction rate between 200.0 seconds and 1200.0 seconds.

c.) Instantaneous rate of the reaction at t=800 s :

At 800 seconds the concentration was = $A=0.031 M$

$t =800.0 s$

Instantaneous rate : $\frac{0.031 M}{800.0 s}=3.875\times 10^{-5} M/s$

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4 years ago

Which bodies of salt water are connected and together make up the global ocean?

kifflom [539]

Answer:

your answer is A. A-E

Explanation:

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3 years ago

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Which is the configuration of an atom in the ground state?

Mnenie [13.5K]

Answer:

Explanation:

because thoes number are use and other thing loo it up at whymeof

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3 years ago

Calculate magnetic moment of a divalent ion in aqueous solution, if the electronic configuration is [Ar] 3d5 .

Ugo [173]

Answer:

5.47 B.M

Explanation:

✓We were given electronic configuration of argon as [Ar] 3d5.

✓This is a divalent ion. It has atomic number of 25.

✓magnetic moment can be calculated using below expresion

√[n(n+2)] .....................eqn(1)

✓ It has 5 unpaired electrons. Then n= 5

✓ [n(n+2)]

✓ substitute the ( n= 5) into eqn(1)

Then magnetic moment= [n(n+2)]

= [ 5(5+2) ]

= 5.47BM

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3 years ago

What are the freezing and boiling points of water on the celsius temperature table

KengaRu [80]

There are 100 degrees between the freezing (0°) and boiling points (100°) of water on the Celsius scale and 180 degrees between the similar points (32° and 212°) on the Fahrenheit scale.

Problem: Two scientists are doing an experiment designed to identify the boiling point
Answer: 250°F is the higher temperature by 2°F

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2 years ago

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