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2 years ago

What is this temperature in degree celsius of 77.2k

Chemistry

1 answer:

nalin [4]2 years ago

7 0

Degree celsius plus 273.15 equals degree kelvin so 77.2 minus 273.15 equals -195.95

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Which of the following characteristics is common to both acids and bases? a. They produce ions when dissolved in water. b. They

dsp73

a. They produce ions when dissolved in water.

acids in water

HA + H2O --> H3O+ + A-

HA --> H+ + A-

bases

B + H2O --> OH - + BH+

5 0

3 years ago

Read 2 more answers

What is a process used to separate homogeneous mixtures using physical changes

navik [9.2K]

Answer:

Evaporation

Explanation:

with the help of evaporation , the liquid components are separated out from solid components easily .

6 0

3 years ago

A reaction between substances Y and Z is

Anuta_ua [19.1K]

Answer : The value of activation energy for this reaction is 108.318 kJ/mol

Explanation :

The Arrhenius equation is written as:

$K=A\times e^{\frac{-Ea}{RT}}$

Taking logarithm on both the sides, we get:

$\ln k=-\frac{Ea}{RT}+\ln A$ ............(1)

where,

k = rate constant = $2.95\times 10^{-3}L/mol.s$

Ea = activation energy = ?

T = temperature = 435 K

R = gas constant = 8.314 J/K.mole

A = pre-exponential factor = $3.00\times 10^{+10}L/mol.s$

Now we have to calculate the value of rate constant by putting the given values in equation 1, we get:

$\ln (2.95\times 10^{-3}L/mol.s)=-\frac{Ea}{8.314J/K.mol\times 435K}+\ln (3.00\times 10^{10}L/mol.s)$

$Ea=108318.365J/mol=108.318kJ/mol$

Therefore, the value of activation energy for this reaction is 108.318 kJ/mol

3 0

2 years ago

Predict whether litmus paper will turn red or blue when dipped in:

Temka [501]

Answer:

a. blue, b. red, c. red, d. basic - blue

Explanation:

a.washing powder ( containing sodium carbonate ) basic -blue

b. orange juice ( containing citric acid )- acidic -red

c. lemonade ( containing H2CO₃ )-acidic - red

d. cleaner ( containg NH₃ )- basic - blue

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3 years ago

It has more protons than Cl but less than K

timama [110]

Answer: Argon (Ar), which has 18 protons.

8 0

3 years ago