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MrMuchimi
3 years ago
9

Which of these statements describes a difference between the mechanics of

Chemistry
2 answers:
Pachacha [2.7K]3 years ago
7 0

Answer:

C. Rockets need only upward thrust as a force for flight.

Explanation:

This is correct

Nady [450]3 years ago
3 0

Answer:

c

Explanation:

You might be interested in
Osmosis is the process in which _______ diffuses across a cell membrane.
siniylev [52]

Answer:

C.

Explanation:

Water

5 0
3 years ago
Read 2 more answers
For the reaction:
Zepler [3.9K]

Answer:

The equilibrium constant for CO now

= 0.212 M

For H₂O

= 0.212 M

For CO₂ = x = 0.2880 M

For H₂ = x = 0.2880 M

Explanation:

The chemical equation for the reaction is:

CO(g) + H2O(g) ⇌ CO2(g) + H2(g)

The ICE Table for this reaction can be represented as follows:

                   CO(g)      +   H2O(g)   ⇌    CO2(g)   +     H2(g)

Initial            0.5                0.5                   -                      -

Change        -x                   -x                      + x                + x

Equilibrium   0.5 -x           0.5 - x

The equilibrium constantK_c = \dfrac{[x][x]}{[0.5-x][0.5-x]}

K_c = \dfrac{[x]^2}{[0.5-x]^2}

where; K_c = 1.845

1.845 = \begin {pmatrix} \dfrac{x}{0.5-x} \end {pmatrix}^2

\sqrt{1.845}= \begin {pmatrix} \dfrac{x}{0.5-x} \end {pmatrix}

1.3583= \begin {pmatrix} \dfrac{x}{0.5-x} \end {pmatrix}

1.3583 (0.5-x) = x

0.67915  - 1.3583x = x

0.67915  = x +  1.3583x

0.67915 = 2.3583x

x = 0.67915/2.3583

x = 0.2880

The equilibrium constant for CO now = 0.5 - x

= 0.5 -  0.2880

= 0.212 M

For H₂O = 0.5 - x

= 0.5 -  0.2880

= 0.212 M

For CO₂ = x = 0.2880 M

For H₂ = x = 0.2880 M

3 0
3 years ago
The specific heats and densities of several materials are given below:
krek1111 [17]

<u>Answer:</u> The change in temperature is 84.7°C

<u>Explanation:</u>

To calculate the change in temperature, we use the equation:

q=mc\Delta T

where,

q = heat absorbed = 1 kCal = 1000 Cal    (Conversion factor: 1 kCal = 1000 Cal)

m = mass of steel = 100 g

c = specific heat capacity of steel = 0.118 Cal/g.°C

\Delta T = change in temperature = ?

Putting values in above equation, we get:

1000Cal=100g\times 0.118Cal/g.^oC\times \Delta T\\\\\Delta T=\frac{1000}{100\times 0.118}=84.7^oC

Hence, the change in temperature is 84.7°C

6 0
3 years ago
Which of the following substances is considered to be a base? A. HCl B. HNO3 C. H2SO4 D. Ca(OH)2
PtichkaEL [24]
Among all of the choices listed, the only option that is a base would be the last one. As it is unique, whereby Hydrogen is not present in the front of the compound.

Bases also possess OH in their molecular formula.
3 0
3 years ago
Read 2 more answers
3 A partial desert food web is shown.
Fofino [41]
Decomposeza is correct
8 0
3 years ago
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