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KiRa [710]
2 years ago
12

Question 23 (4 points)

Chemistry
1 answer:
wariber [46]2 years ago
7 0
Having 1 parent which is known as asexual reproduction
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I really need the answers please!
krek1111 [17]

1) D = 13.6 g / mL

2)ethyl alcohol weighs 158g

3)ρ _copper = 8.9 g cm^{3}

Explanation:

1)

D = m / V

=306.0 g / 22.5 mL

D= 13.6 g / mL

2)

density = mass / volume

mass = density × volume  

=0.789g /ml × 200.0 ml

M=158g

Ethyl alcohol weighs 158g

3)

ρ  (density) = Mass  / Volume

ρ _copper = 1896 g / 8.4cm × 5.5cm × 4.6cm

= 1896g / 212.5 cm^{3}

ρ _copper=8.9 g cm^{3}

4 0
2 years ago
When the pH of a solution is 12.83, what is [H +]?
inn [45]

Answer:

B.9.710-11M

Explanation:

<h3>plss tell me if im wrong</h3>

4 0
3 years ago
How to get left ventricular end diastolic pressure echo equation?
aliina [53]
Whdhrntggmtkasbudubbffjtt
5 0
3 years ago
How does the adaptations of a giraffe help survive its environment
strojnjashka [21]

Answer:

"They drink water when it is aivailable but can go weeks without it, they rely on morning dew and the water content of their food". they can use plants as resources to live.

7 0
2 years ago
A solution is made by dissolving
barxatty [35]

Answer:

4.52 mol/kg

Explanation:

Given data:

Mass of lithium fluoride = 22.1 g

Mass of water = 188 g

Molality = ?

Solution:

Molality:

It is the number of moles of solute into kilogram of solvent.

Formula:

Molality = number of moles of solute / kilogram solvent

Mathematical expression:

m = n/kg

Now we will convert the grams of LiF into moles.

Number of moles = mass/ molar mass

Number of moles = 22.1 g/ 26 g/mol

Number of moles = 0.85 mol

Now we will convert the g of water into kg.

Mass of water = 188 g× 1kg/1000 g = 0.188 kg

Now we will put  the values in formula.

m = 0.85 mol / 0.188 kg

m = 4.52 mol/kg

8 0
2 years ago
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