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Bumek [7]
3 years ago
12

Each of the following values was read on an instrument of measuring device. In each case the last digit was estimated. Tell what

divisions would have been made on the scale or measuring device.
example: 16.00 The scale read to tenths; hundredths were estimated

16 g

16.00 mL

160 cm

1600 g

160.0 g
Chemistry
1 answer:
Readme [11.4K]3 years ago
5 0
16 g is the correct answer
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Suppose a 500.mL flask is filled with 1.0mol of CO, 1.5mol of H2O and 0.70mol of CO2. The following reaction becomes possible: +
valentina_108 [34]

Answer:

[CO] = 0.62 M

Explanation:

Step 1: Data given

Volume of the flask = 500 mL

Number of moles CO = 1.0 moles

Number of moles H2O = 1.5 moles

Number of moles CO2 = 0.70 moles

The equilibrium constant K for this reaction is 3.80

Step 2: The balanced equation

CO(g) + H2O(g) ⇆ CO2(g) +H2(g)

Step 3: Calculate the initial concentrations

Concentration = moles / volume

[CO] = 1.0 moles / 0.500 L = 2.0 M

[H2O] = 1.5 moles / 0.500 L = 3.0 M

[CO2] = 0.70 moles / 0.500 L = 1.4 M

[H2] = 0M

Step 4: The concentration at the equilibrium

For 1 mol CO we have 1 mol H2O to produce 1 mol CO2 and 1 mol H2

[CO] = 2.0 -X M

[H2O] =  3.0 - X M

[CO2] =1.4 + X M

[H2] = X M

Step 5: Define Kc

Kc = [CO2][H2]/ [CO][H2O]

3.80 = (1.4 + X) * X / ((2.0 - X)*3.0 -X))

X = 1.38

[CO] = 2.0 -1.38 = 0.62 M

[H2O] =  3.0 - 1.38 = 1.62 M

[CO2] =1.4 + 1.38 M = 2.78

[H2] = 1.38 M

Kc = (2.78*1.38) / (0.62*1.62)

Kc = 3.8

[CO] = 0.62 M

8 0
3 years ago
Write a strong claim about the question:
mel-nik [20]

Answer:

Usually, the cells are round, elongated or spherical. There are also some cells which are long and pointed on both the ends. Such cells exhibit spindle shape. In some cases, the cells are very long.

Explanation:

Hope I helped! Brainliest plz!

3 0
3 years ago
HELLP ME PLSSS
Dima020 [189]

Answer:

B

Explanation:

conduction is the transfer of heat between objects that touch

8 0
3 years ago
Find the age t of a sample, if the total mass of carbon in the sample is mc, the activity of the sample is a, the current ratio
kkurt [141]
should be 7.57*10^3 years
4 0
4 years ago
Calcium reacts with oxygen to form calcium oxide. The chemical equation for this reaction is Ca + O2→CaO . What is the product,
iris [78.8K]

Answer:

A. CaO

Explanation:

Reactant are the species that take part in and also undergoes the reaction to form species which are known as products.

Symbolic representation of the chemical reaction with the help of the formulas and symbols is known as chemical equation. In the chemical equation, reactants are written at left-hand side as well as products are expressed or written on right-hand side. The coefficients which are written before the formulas or the symbols are known as stoichiometric numbers.

Thus, in the reaction shown below:-

Ca+O_2\rightarrow CaO

<u>Thus, The product of the reaction is:- CaO</u>

5 0
3 years ago
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