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3 years ago

MUST BE ANSWERED QUICK!!!

Chemistry

2 answers:

gavmur [86]3 years ago

5 0

I agree. The second statement is correct. Chemical reactions involve chemical bonds being both broken and made. Nuclear reactions involve nuclear bonds being broken and made but also may form new atoms or elements.
Photo is from my Nelson Chemistry textbook.

cricket20 [7]3 years ago

3 0

To my knowledge the answer is B or the second one. I hope it helped.

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Which properties are examples of chemical properties? Check all that apply.

Scorpion4ik [409]

Answer:

1.Reactivity

2.combustibility

3.Shape

Hope this helps,

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Explanation:

5 0

3 years ago

Read 2 more answers

how is substitution reaction in alkanes different from dehydrogenation reaction since both involve removing a hydrogen atom from

Ilia_Sergeevich [38]

Answer:

See Explanation

Explanation:

A substitution reaction means the replacement of one or more hydrogen atoms in an alkane by another atom or group. It does not introduce a double bond into the product. The product retains single bonds between the species present.

For instance;

CH4 + Cl2 -------> CH3Cl +HCl

is a substitution reaction

Dehydrogenation is the process of removing two hydrogen atoms from a saturated compound compound thereby yielding an unsaturated product.

E.g

C2H6 --------->C2H4 + H2

The key difference is that substitution reaction yields a saturated product while dehydrogenation yields an unsaturated product.

8 0

3 years ago

An object has a density of 1.8 g/mL and a mass of 14 g. What is the volume of the object

lesya692 [45]

Answer:

0.13 cm^3

Explanation:

Volume = Mass/ density

1.8 g/ml / 14g = 0.128571429

Both numbers have 2 significant digits.

With that, the answer rounds to 0.13

The final answer is 0.13 cm(don't forget the units for volume)

Hope it helped!

4 0

3 years ago

Consider the following chemical equilibrium: CaCO3 (s) Cao (s)+cO2 (g) Now write an equation below that shows how to calculate K

True [87]

Answer:

$Kc = Kp/(RT)$

Explanation:

Let's consider the following chemical equilibrium:

CaCO₃(s) ⇄ CaO(s) + CO₂(g)

Given the pressure equilibrium constant Kp = pCO₂

We can calculate the concentration equilibrium constant (Kc) using the following expression.

$Kc = Kp/(RT)^{\Delta n(g)}$

where,

R is the ideal gas constant

T is the absolute temperature

Δn(g) = moles of gaseous products - moles of gaseous reactants = 1 - 0 = 1

The expression for this reaction is:

$Kc = Kp/(RT)$

4 0

3 years ago

How does the vapor pressure of water at 10°C compared with its vapor pressure at 50°C ?

Sliva [168]

Answer: The vapor pressure of water at 10°C will be less as compared with its vapor pressure at 50°C.

Explanation:

Vapor pressure of a liquid is defined as the pressure exerted by the vapors in equilibrium with the liquid/solution at a particular temperature.

As Kinetic energy is dependent on the absolute temperature of the gas.

$K.E=\frac{3}{2}RT$

where R = gas constant

T = temperature

On increase in temperature, the kinetic energy of the molecules increase and thus more liquid molecules can escape to form vapours and thus will exert more vapor pressure.

Thus the vapor pressure of water at 10°C will be less as compared with its vapor pressure at 50°C.

4 0

3 years ago