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Dennis_Churaev [7]
3 years ago
10

!!PLEASE ANSWER!! 24 PTS!!

Chemistry
1 answer:
Thepotemich [5.8K]3 years ago
6 0

1.magnesium

2.magnesium

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20 POINTS!!
Alenkinab [10]

Answer:

1. molarity is = 0.1174

2. molarity is = 9.3

3. molarity is =0.009392

Explanation:

Q#1.

mass of sucrose is 14.07g

molar mass of sucrose is 342 3g/mol

so, 14.07x1/342.3 = 0.0411

now the volume is of water is 0.35

so, 0.0411/0.35 = 0.1174

Q#2.

concentration is 4.5

so, 4.5x1/1000= 0.0045

then, 0.0411/0.0045 = 9.13

Q#3.

M1M1=M2M2

molarity of the same sucrose is 0.1174

so, diluted in 40mL

and the volumetric flask is 500mL

so, 0.1174x40/500= 0.009392

8 0
2 years ago
Mount Everest rises to a height of 8,850 m above sea level. At a base camp on the mountain the atmospheric pressure is measured
yan [13]

Answer:

Water will boil at 76^{0}\textrm{C}.

Explanation:

According to clausius-clapeyron equation for liquid-vapor equilibrium:

                                         ln(\frac{P_{2}}{P_{1}})=\frac{-\Delta H_{vap}^{0}}{R}[\frac{1}{T_{2}}-\frac{1}{T_{1}}]

where, P_{1} and P_{2} are vapor pressures of liquid at T_{1} (in kelvin) and T_{2} (in kelvin) temperatures respectively.

Here, P_{1} = 760.0 mm Hg, T_{1} = 373 K, P_{2} = 314.0 mm Hg

Plug-in all the given values in the above equation:

                          ln(\frac{314.0}{760.0})=\frac{-40.7\times 10^{3}\frac{J}{mol}}{8.314\frac{J}{mol.K}}\times [\frac{1}{T_{2}}-\frac{1}{373K}]

                       or, T_{2}=349 K

So, T_{2}=349K=(349-273)^{0}\textrm{C}=76^{0}\textrm{C}

Hence, at base camp, water will boil at 76^{0}\textrm{C}

6 0
3 years ago
NEED HELP QUICK!!!<br> pls give quick reason why
weqwewe [10]

Answer:

- 20 J

Explanation:

Heat of Reaction = Heat of Products - Heat of Reactants

From the graph;

Heat of Products = 10

Heat of Reactants = 30

Heat of Reaction = 10 - 30 = -20 J

4 0
3 years ago
Help me get this right no links
katrin2010 [14]

Answer:

1 and 2

Explanation:

1. The moon blocks the sun's light from hitting the Earth. (It casts a shadow on the earth by doing so)

2. The moon moves between the Earth and the Sun. (So it blocks the sun's light)

3 0
3 years ago
What is the density of a 10 kg mass that occupies 5 liters?<br> ( pls need help)
bulgar [2K]

Answer: d=2000 g/L

Explanation:

Density is mass/volume. The units are g/L. Since we are given mass and volume, we can divide them to find density. First, we need to convert kg to g.

10kg*\frac{1000g}{1kg} =10000 g

Now that we have grams, we can divide to get density.

d=\frac{10000g}{5 L}

d=2000g/L

7 0
3 years ago
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