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2 years ago

Consider the energy transfers and transformations that occur when a person rides a bicycle. Describe thi

Chemistry

2 answers:

Leno4ka [110]2 years ago

8 0

Answer:

b,a,b

Explanation:

cupoosta [38]2 years ago

7 0

Answer:

1.B

2.A

3.B

Explanation:

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Students performed a procedure similar to Part II of this experiment (Analyzing Juices for Vitamin C Content) as described in th

Elan Coil [88]

Students performed a procedure similar to Part II of this experiment (Analyzing Juices for Vitamin C Content) as described in the procedure section. Given that molarity of DCP is 9.98x10-4 M, it took 16.34 ml of DCP to titrate 10 mL of sample.

Amount of ascorbic acid = 0.050 L sample (0.01634 L DCP/0.01 L sample)( 9.98x10-4 mol DCP/L DCP)(1 mol Ascorbic acid/ 1mol DCP)(176.124 g/mol)(1000mg/1g)= 14.36 mg ascorbic acid

8 0

3 years ago

Read 2 more answers

How many grams are in 0.220 mol of Ne?

kumpel [21]

Answer:

4.44 g Ne

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis

Explanation:

Step 1: Define

0.220 mol Ne

Step 2: Identify Conversions

Molar Mass of Ne - 20.18 g/mol

Step 3: Convert

$0.220 \ mol \ Ne(\frac{20.18 \ g \ Ne}{1 \ mol \ Ne} )$ = 4.4396 g Ne

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

4.4396 g Ne ≈ 4.44 g Ne

3 0

3 years ago

Read 2 more answers

Chlorine gas is added to a large flask to a pressure of 1.85 atm, at a temperature of 322 K. Phosphorus is added, and a reaction

AVprozaik [17]

Answer:

The volume of the flask is 20.245 litres .

Explanation:

We are given with following information-

$PV=nRT$ -------- 1

where R = $0.0821L.atom/mole.K$

Molar mass of $PCl_5=208.22g/mole$

The given chemical equation is -

$2P _(_s_)+5Cl_2 _(_g_)\rightarrow2PCl_5 _(_s_)$ --------- 2

Now , calculation -

Mass of $PCl_5$ formed = 118g

Molar mass of $PCl_5$ = $208.22g/mole$

Mole = $\frac{mass (g)}{molar mass}$

Therefore , moles of $PCl_5$ formed = $\frac{118}{208.22}$

From equation 2 , we get to know that ,

2mole $PCl_5$ formed from 5 mole $Cl_2 _(_g_)$

Therefore , $\frac{118}{208.22}$ mole $PCl_5$ formed from $\frac{5}{2} \times\frac{118}{208.22}$ mole $Cl_2 _(_g_)$

Moles of $Cl_2 _(_g_)$ used = $\frac{5\times118}{2\times208.22} mole$

R= $0.0821L.atom/mole.K$

Pressure (P)= 1.85atm

Temperature (T)= 322K

Moles of $Cl_2 _(_g_)$ (n)= $\frac{5}{2} \times\frac{118}{208.22}$ moles

Applying the formula above in 1 equation , that is

PV = nRT

putting the given values -

$1.85 \times V=\frac{5}{2} \times\frac{118}{208.22}\times0.0821\times322$

V = 20.245 litres.

Hence , the volume of the flask is 20.245 litres .

8 0

3 years ago

If MnO2 was not added to this reaction, what effect would that have on the production of H2O and O2?

maria [59]

For the answer to the question above,
I am going to assume that MnO2 is a catalyst most likely breakdown of H2O2

H2O2----MnO2------> H2O + 1/2 O2

in that case, B) is answered in the trump suit 

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edit: I need to have a plate account to see - which I don't 
is it something like

2H2O2 ---------------> 2H2O + O2
...............MnO2

where MnO2 is underneath the arrow, in that case, it means it is a catalyst and production will DRASTICALLY decrease in production

8 0

3 years ago

Where in nature would we find pure sand that does not contain smaller or larger particles?

sineoko [7]

Explanation:

Sand is a common material found on beaches, deserts, stream banks, and other landscapes worldwide. In the mind of most people, sand is a white or tan, fine-grained, granular material. However, sand is much more diverse - even beyond the pink sand beaches of Bermuda or the black sand beaches of Hawaii.

5 0

3 years ago