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3 years ago

The measure of the number of atoms in one element that will combine with am atom of element is?

Chemistry

2 answers:

astraxan [27]3 years ago

7 0

The correct answer is:

C. valence.

Explanation:

The valence or valency of an element is a stratagem of its connecting power with other atoms when it makes chemical compounds or molecules.

A valence electron is an outer shell electron that is connected with an atom, and that can compete in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond provide one valence electron in order to form a shared pair.

raketka [301]3 years ago

4 0

<span>These atoms are known as valence atoms.</span>

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How many moles are in 1.42 x 10^25<br> molecules of NaCl?

Sholpan [36]

<h3>Answer:</h3>

23.6 mol NaCl

<h3>General Formulas and Concepts:</h3>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Reading a Periodic Table

<h3>Explanation:</h3>

<u>Step 1: Define</u>

1.42 × 10²⁵ molecules NaCl

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

Set up: $\displaystyle 1.42 \cdot 10^{25} \ molecules \ NaCl(\frac{1 \ mol \ NaCl}{6.022 \cdot 10^{23} \ molecules \ NaCl})$
Multiply/Divide: $\displaystyle 23.5802 \ mol \ NaCl$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

23.5802 mol NaCl ≈ 23.6 mol NaCl

3 0

3 years ago

A particular brand of gasoline has a density of 0.737 g/ml at 25 ∘c. how many grams of this gasoline would fill a 13.0 gal tank

Usimov [2.4K]

Density of gasoline is 0.737 g/mL and volume of tank is 13.0 gal.

Since, 1 US gal=3.78 L

Volume of tank in L will be:

$V=13.0 gal(\frac{3.78 L}{1 gal})=49.14 L$

Also, 1 L=1000 mL

Thus,

$V=49.14 L(\frac{1000 mL}{1 L})=49140 mL$

Mass of gasoline can be calculated as follows:

m=d×V

Here, d is density and V is volume thus,

$m=0.737 g/mL\times 49140 mL=3.62\times 10^{4}g$

Therefore, mass of gasoline will be $3.62\times 10^{4}g$ .

7 0

3 years ago

Help this question is super hard!!

melomori [17]

Answer:

They all can, but HCl would be the strongest conductors because they are strong acids/bases, meaning their ions dissociate at a faster rate in aqueous solution.

4 0

3 years ago

Read 2 more answers

The table below shows the commonly eaten foods of some organisms.

Anuta_ua [19.1K]

Answer: A. vegetables, meat, chicken

B. insects, fruits, seeds

Explanation:

A primary consumer is the trophic level in the food chain, which feeds upon the plants and other autotrophs. It includes all the herbivorous animals.

A secondary consumer is the trophic level in the food chain, which feeds upon the herbivorous animals. They are carnivores.

A and B are the two correct options. A will feed upon both plant and animal products such as vegetables and meat, and chicken respectively.

Also B also consumes over the plant products such as fruits and seeds and insects.

8 0

3 years ago

onsider the structure. a carbon is bonded to two three carbon chains and a branched alkane. the branched alkane is a 2 carbon ch

pshichka [43]

If we consider a structure in which a carbon is bonded to two three carbon chains and a branched alkane then the branched alkane is a 2 carbon chain with a ethyl on Carbon 1 then the correct name of the structure is <u>4-(isopropyl)heptane. </u>

The two three carbon chains bonded to the carbon atom will form the parent chain of this structure and this chain will have 7 carbon atoms in it.

Since this chain is that of an alkane and it has no functional group attached so the root name will be heptane.

Now, we have to add a prefix by naming the branched alkyl chain. The branched chain has 3 carbon atoms in it with a methyl group on carbon 1.

So, this name of this group will be propyl.

The position of this propyl group is 4th on the parent chain so the full name of the structure will be 4-(isopropyl)heptane.

To know more of branched alkane here

brainly.com/question/14507628

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4 0

1 year ago