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3 years ago

How many atoms of Sn are in 0.796 moles of this element?

Chemistry

1 answer:

garik1379 [7]3 years ago

3 0

Answer:

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Explanation:

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Helpppp helpppp plsssss

Sedbober [7]

$\Large \text{1)}$

$\textbf{Use the formula and substitute the values}$

$\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}$

$\textbf{Solve for the number of moles}$

$n = 0.003\ mol$

$\textbf{Calculate final volume }$

$40+10=50\ mL$

$\textbf{Number of moles remains same. Solve for concentration}$

$\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L$

$\Large \text{2)}$

$\displaystyle DF=\frac{V_f}{V_i}$

$\displaystyle DF=\frac{50}{10}=5$

3 0

3 years ago

What happens if you apply pressure on the oobleck?

nignag [31]

What happens if you apply pressure on the oobleck?

the surfice gets hard and nothing can pass through it, you can punch it and it will hurt

What happens if you try rolling the oobleck into a ball?

you cant i will go back to being a liquid and fall through your fingers

What happens when you let it run through your fingers?

its just like a liquid

only if you add presure will it turn hard

8 0

3 years ago

Which type of society survives mainly by foraging for food?

Dennis_Churaev [7]

The appropriate answer is a. HUNTER-GATHERER. Hunter-gatherer societies are nomadic and they forage for edible plants, bean, fruits and nuts. They also hunt wild game for food. Early humans in the Neolithic period practiced this way of life.
Agrarian societies thrive on agriculture which they depend on for sustainable and for trade. Animals and plants are domesticated and so people can settle and build a society. Pastoral agriculture is a semi-nomadic lifestyle where the society is centered around keeping herds of grazing animals. Industrial societies focus on manufacturing and this is the backbone of the society.

6 0

3 years ago

You take an ice cube (mass = 18g) from the freezer (T=-10°C) and place it on the table. Later that day, you notice a puddle of w

klasskru [66]

The equation to be used to calculate the heat absorbed when solid melts is the enthalpy of melting. It is represented as H = mCpT where H is the heat released after phase change, m is the mass of the substance, Cp is the specific heat capacity of the substance and T is the change in temperature.

H = mCpT

H = (18g/1000g/kg)(4.184kJ/kg-K)(293-(-263))

H = 41.87kJ

6 0

4 years ago

Read 2 more answers

What mass of iron would be required to react with 10.0L of O2 gas?

SashulF [63]

33.2 g of iron (Fe)

Explanation:

We have the following chemical reaction in which iron react with oxygen to form the iron (III) oxide:

4 Fe + 3 O₂ → 2 Fe₂O₃

number of moles = volume / 22.4 (L/mole)

number of moles of O₂ = 10 / 22.4

number of moles of O₂ = 0.446 moles

Taking in account the chemical reaction we devise the following reasoning:

if 4 moles of Fe react with 3 moles of O₂

then X moles of Fe react with 0.446 moles of O₂

X = (4 × 0.446) / 3 = 0.595 moles of Fe

number of moles = mass / molar weight

mass = number of moles × molar weight

mass of Fe = 0.595 × 55.8

mass of Fe = 33.2 g

Learn more about:

number of moles

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4 0

4 years ago