All categories

3 years ago

Solve for x in the following expression: 3 / x = 7

Chemistry

2 answers:

amm18123 years ago

4 0

The answer is D) 0.4285

dexar [7]3 years ago

4 0

It would be 21 (B) since to get X by itself, you have to do the opposite sign, which would be be multiplication. so x times 3. and what you do to one side, you do to the other. so 7 times 3= 21.

You might be interested in

Molarity and Dilution

Aleonysh [2.5K]

Answer: The moles needed are 0.01.

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n = moles of solute $(CuSO_4.5H_2O)$ = ?

$V_s$ = volume of solution in ml

Now put all the given values in the formula of molarity, we get

$0.10=\frac{n\times 1000}{100}$

$n=\frac{0.10\times 100}{1000}=0.01$

Therefore, the moles needed are 0.01.

6 0

3 years ago

If the vapor pressure of an aqueous solution containing 6.00 moles of a nonvolatile solute has a vapor pressure of 19.8 torr, an

Margaret [11]

Answer:

36.5 mol

Explanation:

The vapor pressure of a solution of a non volatile solute in water is given by Raoult´s law:

P H₂O = χ H₂O x P⁰ H₂O

where χ H₂O is the mole fraction of water in the solution and P⁰ H₂O

In the turn the mole fraction is given by

χ H₂O = mol H₂O / total # moles = mol H₂O /ntot

Thus

P H₂O = mole H₂O / n tot x P⁰ H₂0

now the mol of H₂O is equal n tot - 6 mol solute

Plugging the values given in the question and solving the resultant equation

19.8 torr = ( ntot - 6 ) x 23.7 torr / n tot

19.8 ntot = 23.7 ntot - 142.2

ntot = 36.5 ( rounded to 3 significant figures )

5 0

3 years ago

Which of the following pure compounds will exhibit hydrogen bonding?

zimovet [89]

Explanation:

For a compound to show hydrogen bonding it is necessary that the hydrogen atom of the compound should be attached to more electronegative atom like fluorine, oxygen or nitrogen.

For example, $CH_{3}CH_{2}OH$ , $CH_{3}NH_{2}$ and $NH_{3}$ all these compounds contain an electronegative atom attached to hydrogen atom.

Therefore, these pure compounds will exhibit hydrogen bonding.

Thus, we can conclude that out of the given options $CH_{3}CH_{2}OH$ , $CH_{3}NH_{2}$ and $NH_{3}$ are the pure compounds which will exhibit hydrogen bonding.

4 0

3 years ago

What is the lewis structure for CH2ClCOO-

FrozenT [24]

Answer: The Lewis structure of Chloroacetate can be found at the attachment below.

Explanation:

CH2ClCOO- The chemical compound is called Chloroacetate.

Reference link for the Chloroacetate structure.

https://www.google.com/search?q=lewis+structure+for+CH2ClCOO-&prmd=ivn&sxsrf=ALeKk03mQcLiY-q5pEriMR0_26ZTXLjmJg:1589680325594&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjfxPPY5LnpAhVloXEKHeAwD-wQ_AUoAXoECA4QAQ&cshid=1589680746615&biw=360&bih=559&dpr=3#

5 0

3 years ago

In the evolution of extremely large stars, they begin as supergiants or supernovas, if the star nucleus is large enough it will

fenix001 [56]

Black hole, or a singularity contained within an event horizon through which no light can escape.

6 0

3 years ago

Read 2 more answers