All categories

2 years ago

Select all the correct answers.

Chemistry

1 answer:

Andrei [34K]2 years ago

4 0

Scientists use scientific notation to communicate extremely small measurements. Hence, option A is correct.

<h3>What scientific notation?</h3>

Scientific notation is a way of writing very large or very small numbers.

Scientists use scientific notation to represent very small or very large numbers because this notation increases the

accuracy of measured quantities.

convenience in using the numbers.

the number of significant figures.

precision of measurements.

Hence, option A is correct.

Learn more about the scientific notation here:

brainly.com/question/18073768

#SPJ1

You might be interested in

How are isotopes of the same element alike? different?

Margaret [11]

Isotopes are elements with the same number of protons but different number of neutrons

5 0

3 years ago

What are the tiny particles that make up protons and neutrons

love history [14]

Protons and neutrons are made up of tiny particles called quarks.

A proton is a baryon made up two Up and one Down quark.

A neutron is made of two Down quarks and one Up quark.

The Up quarks possess a 2/3 positive charge while the Down quark possess a 1/3 negative charge.

When we refer that a proton consists of two Up quarks and a Down, this simply means that its net appearance matches this description.

It is thought that quarks themselves are surrounded by gluons.

Gluons are the basic particles underlying the strong interaction between protons and neutrons in the nucleus.

7 0

4 years ago

Given the two half-reactions, what must be done in the next step before the reaction can be balanced? Au3+ --> Au I- --> I

Artyom0805 [142]

Answer:

The balance equation is

$2Au^{+3} + 6I^{-}$ → $2Au + 3I_{2}$

Explanation:

first, we have to make sure that the atoms are balanced

$Au^{+3}$ → $Au^{}$

$2I^{-}$ → $I_{2}$

then we proceed to balance charges of each half-reaction

$Au^{+3} + 3e^{-}$ → $Au^{}$

$2I^{-}$ → $I_{2}$ $+ 2e^{-}$

Now we multiply the half-reactions to match the number of electrons in each one

( $Au^{+3} + 3e^{-}$ → $Au^{}$ )x2

( $2I^{-}$ → $I_{2}$ $+ 2e^{-}$ )x3

and now we do the sum of the half-reactions

2 $Au^{+3} + 6e^{-}$ → 2 $Au^{}$

$6I^{-}$ → 3 $I_{2}$ $+ 6e^{-}$

$2Au^{+3} + 6I^{-}$ → $2Au + 3I_{2}$

note: the only atom that needed to be balanced was I

3 0

4 years ago

Read 2 more answers

which of these energy resources can produce the most amount of energy from the smallest amount of fuel? choices coal, uranium, p

nikitadnepr [17]

<span>The answer should be Uranium. As tiny amounts of that (rods normally) can fuel a whole nuclear energy station for years.</span>

6 0

3 years ago

Read 2 more answers

Solution A has a pH of 3 and solution Z has

igor_vitrenko [27]

PH of a solution is -ln[H3O+] so,in case of A pH=3 or,-log[H3O+]=3 or,[H3O+]=10^-3 in case of B pH=6 pr,-log[H3O+]=6 or, [H3O+]=10^-6 so,hydronium ion concentration in solution A /the hydronium ion concentration in solution Z =10^-3/10^-6 =1000 2) Ca(OH)2+2 HNO3=Ca(NO3)2+2 H2O so the answer is 2.

5 0

4 years ago

Read 2 more answers