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Kipish [7]
2 years ago
5

Can someone please help me with this ASAP??

Chemistry
2 answers:
kipiarov [429]2 years ago
7 0

1.00

Explanation:

the density of water is always 1

makkiz [27]2 years ago
3 0

Answer:

The density of water is 997 kg/m³. You'll memorize it soon enough. :)

Explanation:

Hope that helped!

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How many orbitals are in the n=3 level
solniwko [45]

The third shell has 3 subshells: the subshell, which has 1 orbital with 2 electrons, the subshell, which has 3 orbitals with 6 electrons, and the subshell, which has 5 orbitals with 10 electrons, for a total of 9 orbitals and 18 electrons.

7 0
3 years ago
Read 2 more answers
3. If you start with 8x1025 molecules of Cl, and 25 grams of KI, how many grams of KCl would
miskamm [114]

Answer:

Percent yield = 89.1%

Explanation:

Based on the equation:

Cl₂ + 2KI → 2KCl + I₂

<em>1 mole of Cl₂ reacts with 2 moles of KI to produce to moles of KCl</em>

<em />

To solve this quesiton we must find the moles of each reactant in order to find the limiting reactant. With the limiting reactant we can find the moles of KCl and the mass:

<em>Moles Cl₂:</em>

8x10²⁵ molecules * (1mol / 6.022x10²³ molecules) = 133 moles

<em>Moles KI -Molar mass: 166.0028g/mol-</em>

25g * (1mol / 166.0028g) = 0.15 moles

Here, clarely, the KI is the limiting reactant

As 2 moles of KI produce 2 moles of KCl, the moles of KCl produced are 0.15 moles. The theoretical mass is:

0.15 moles * (74.5513g / mol) =

11.2g KCl

Percent yield is: Actual yield (10.0g) / Theoretical yield (11.2g) * 100

<h3>Percent yield = 89.1%</h3>
3 0
3 years ago
One isotope of oxygen differs from another isotope of oxygen in *
Reptile [31]

Each isotope of Oxygen has a different number of neutrons

<h3>Further explanation </h3>

The elements in nature have several types of isotopes

Atomic mass is the average atomic mass of all its isotopes

Isotopes are atoms has the same number of protons but has a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

Some of the isotopes of oxygen are:

\tt _8^{16}O,_8^{17}O,_8^{18}O

Each isotope has 8 protons and 8 electrons but has a different number of neutrons

For O-16: number of neutrons = 16-8 = 8

For O-17: number of neutrons = 17-8 = 9

For O-18: number of neutrons = 18-8 = 10

4 0
2 years ago
List 10 uses of metals​
KatRina [158]

Answer:

1.In electronics

2 In medicine

3.In the construction

4.In jewelry

5.In machinery and automobiles

6.In agriculture

7.In the kitchen

8.Furniture

9. Security system

10 Bullion market

7 0
2 years ago
After fertilization, female cones become very:<br> sticky<br> light<br> O hard
S_A_V [24]

Answer:

light

Explanation:

sorry don't now this one

8 0
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