What is the name of the compound Si5F7?

Ostrovityanka [42]

Answer : $Na^+$ and $Cl^-$ are the ions formed from the NaCl salt dissolve in water.

Explanation :

The NaCl salt is formed when positive sodium ions bonded to the negative chloride ions.

When NaCl dissolves in water, the negative part of water attract the positive sodium ions and positive part of water attract the negative chloride ions.

5 0

2 years ago

If you compared 1 m solutions, was a 1 m nacl solution more or less hypertonic than a 1 m sucrose solution? what is your evidenc

igor_vitrenko [27]

When you say the solution is hypertonic, it means that the solution has a higher osmotic pressure. The formula for this is:

P = iMRT,
for strong electrolytes, i = number of ions.
for nonelectrolytes, i = 1

1. The P for sucrose solution which is a nonelectrolyte (assuming room temp):
P = (1)(1m)(8.314 J/mol-K)(298 K)
P = 2477.572 Pa

The P for NaCl solution, which is a strong electrolyte:
P = (2)(1 m)(8.314)(298 K)
P = 4955.144 Pa

So, that means that NaCl is more hypertonic than the sucrose solution.

2. For the second question, the P for the combination of 1 m glucose (nonelectrolyte) and 1 m sucrose is:
P = (1)(1 m)(8.314)(298 K) + (1)(1)(8.314)(298 K) = 4955.144 Pa
In this case, the osmotic pressures are now equal. It is not hypertonic, but isotonic.

7 0

2 years ago

What is the mass of a sample of water containing 3.55×1022 molecules of h2o?

ad-work [718]

6,02×10²³ -------------- 18g
3,55×10²² -------------- x $x=\frac{3,55*10^{22}*18g}{6,02*10^{23}}=10,61*10^{22-23}g=10,61*10^{-1}g=1,061g$

6 0

2 years ago

Read 2 more answers

Give the product for the reaction of 1-butene with methanol in the presence of acid. The mechanism is the same as the mechanism

Nuetrik [128]

Answer:

The final result is 2-methoxybutane.

Explanation:

1-butene has a carbon-carbon double bound between C1 and C2.

When it will react with methanol, in the presence of an acid, the result will be an ether.

C4H8 + CH3OH → C5H12O

An acid-catalyzed ether synthesis from alkenes is limited by carbocation stability.

In the first step, the double bound will disappear. The C2 atom will be a C+ atom, this becaus it has only 3 bounds and not 4.

This C+ -atom will atract the O- atom to form an ether. The CH3 of methanol will bind on the C3 atom, this is the most stable position.

2-methoxybutane will be formed. It has a structural formula of C5H12O

1-methoxybutane will not be formed, because it's less stable.

1-butanol will be formed when water is added to 1-butene. The mechanism has the same principle but not the same product.

1-ethoxybutane and 2-ethoxybutane have a structural formula of C6H14O, this will not be the final result.

The final result is 2-methoxybutane.

8 0

2 years ago

The volume of a single strontium atom is 4.15×10-23 cm3. What is the volume of a strontium atom in microliters

Ivenika [448]

Answer:- $4.15*10^-^2^0\mu L$

Solution:- It is a volume unit conversion problem where we are asked to convert the volume from $cm^3$ to microliters.

We know that:

$1cm^3$ = 1 mL

$1mL=10^-^3L$

and, $1L=10^6\mu L$

Let's use these conversions factors for the desired conversion using dimensional as:

$4.15*10^-^2^3cm^3(\frac{1mL}{1cm^3})(\frac{10^-^3L}{1mL})(\frac{10^6\mu L}{1L})$

= $4.15*10^-^2^0\mu L$

So, the answer is $4.15*10^-^2^0\mu L$ .

7 0

2 years ago