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ElenaW [278]
2 years ago
5

Worth 100 points plus ill mark brainliest

Chemistry
1 answer:
Vlad [161]2 years ago
4 0

Answer:

3.84 g

Explanation:

Molar Mass of Sodium Phosphate = 11(3) + 31 + 16(4) = 128

We know M = m/V(L) for

M= Molarity of substance

m = number of moles of substance (i.e solute)

V(L) = volume of solution in Litres

Therefore, m= 0.24 × 0.125 = 0.03

We also know

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What is the density of an object that has a volume of 34.2 cm^3 and a mass of 19.6 g? (a) 0.573 g/cm^3 (b) 1.74 g/cm^3 (c) 670 g
KengaRu [80]

Answer: The density of the object will be 0.573g/cm^3

Explanation:

Density is defined as the mass contained per unit volume.

Density=\frac{mass}{Volume}

Given : Mass of object = 19.6 grams

Volume of object= 34.2cm^3

Putting in the values we get:

Density=\frac{19.6g}{34.2cm^3}=0.573g/cm^3

Thus density of the object will be 0.573g/cm^3

8 0
3 years ago
How many grams of HF are needed to react with 3.0 moles of Sn? *
Lostsunrise [7]

Answer:

120g

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

Sn + 2HF —> SnF2 + H2

Next, we shall determine the number of mole of HF needed to react with 3 moles of Sn.

From the balanced equation above, 1 mole of Sn reacted with 2 moles of HF.

Therefore, 3 moles of Sn will react with = 3 x 2 = 6 moles of HF.

Finally, we shall convert 6moles of HF to grams

This is illustrated below:

Number of mole of HF = 6moles

Molar Mass of HF = 1 + 19 = 20g/mol

Mass of HF =..?

Mass = number of mole x molar Mass

Mass of HF = 6 x 20

Mass of HF = 120g

Therefore, 120g of HF is needed to react with 3 moles of Sn

6 0
3 years ago
What quantity in moles of HCl are there in 35.0 mL of 0.350 M HCl?
marta [7]

Answer:

0.0123 moles

Explanation:

Concentration = Moles / Volume of solution

or you can rearrange the formula to get

Moles = concentration (moles/liter)  x  volume of solution (liter)

First convert your volume to L instead of mL.  35mL = 0.035L

moles  =  0.350 moles/liter   x    0.035 liter  (liters cancel out)

moles = 0.0123

5 0
2 years ago
Identify the type of chemical bond that forms when potassium reacts with bromine to form a salt.
Sunny_sXe [5.5K]

2K + Br2 ===> 2KBr


It's very ionic. The transfer of 2 electrons from K to Br2 is nearly as complete as it can be.

3 0
3 years ago
Which of the following elements is found in the p sublevel?<br> O Ti<br> O Li<br> ОСІ<br> O He
ICE Princess25 [194]

Answer:

OC I

Explanation:

can't explain srry

8 0
3 years ago
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