1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kitty [74]
4 years ago
14

What is the density of an object with a mass of 40.0 g and a volume of 80.0 cm3

Chemistry
1 answer:
Komok [63]4 years ago
8 0
Density = mass/volume
D  = 40/80 = 0.5g
D= 0.5g
You might be interested in
An electrochemical cell is constructed with a zinc metal anode in contact with a 0.052 M solution of zinc nitrate and a silver c
lana [24]

Answer:

Q = 12.38

Explanation:

The Nernst equation is given as; Ecell = E°cell - (2.303RT/nF) log Q  ;where Q is the reaction quotient.

The reaction quotient, Q  in a reaction, is the product of the concentrations of the products divided by the product of the concentrations of the reactants.

In an electrochemical cell, Q is the ratio of the concentration of the electrolyte at the anode to that of the electrolyte at the cathode.

Q = [anode]/[cathode]

therefore , Q = 0.052/0.0042 = 12.38

6 0
3 years ago
You need to make up 500.0 ml of .5750 m glucose (180.15g/mol). What is the mass of the glucose should you measure out
Marianna [84]

Answer:

Calculate the volume (in mL) of the 1.356 M stock NaOH solution needed to prepare 250.0 mL ... Glucose (molar mass=180.16 g/mol) is a simple, soluble sugar ... g of glucose in enough water to make 500.0 mL of solution. • Step 2: Transfer 18.6 mL of glucose

3 0
3 years ago
The activation energy of a certain uncatalyzed biochemical reaction is 50.0 kJ/mol. In the presence of a catalyst at 37°C, the r
rodikova [14]

Answer:

E₁ ≅ 28.96 kJ/mol

Explanation:

Given that:

The activation energy of a certain uncatalyzed biochemical reaction is 50.0 kJ/mol,

Let the activation energy for a catalyzed biochemical reaction = E₁

E₁ = ??? (unknown)

Let the activation energy for an uncatalyzed biochemical reaction = E₂

E₂ = 50.0 kJ/mol

    = 50,000 J/mol

Temperature (T) = 37°C

= (37+273.15)K

= 310.15K

Rate constant (R) = 8.314 J/mol/k

Also, let the constant rate for the catalyzed biochemical reaction = K₁

let the constant rate for the uncatalyzed biochemical reaction = K₂

If the  rate constant for the reaction increases by a factor of 3.50 × 10³ as compared with the uncatalyzed reaction, That implies that:

K₁ = 3.50 × 10³

K₂ = 1

Now, to calculate the activation energy for the catalyzed reaction going by the following above parameter;

we can use the formula for Arrhenius equation;

K=Ae^{\frac{-E}{RT}}

If K_1=Ae^{\frac{-E_1}{RT}} -------equation 1     &

K_2=Ae^{\frac{-E_2}{RT}} -------equation 2

\frac{K_1}{K_2} = e^{\frac{-E_1-E_2}{RT}

E_1= E_2-RT*In(\frac{K_1}{K_2})

E_1= 50,000-8.314*310.15*In(\frac{3.50*10^3}{1})

E_1 = 28957.39292  J/mol

E₁ ≅ 28.96 kJ/mol

∴ the activation energy for a catalyzed biochemical reaction (E₁) = 28.96 kJ/mol

8 0
3 years ago
If the answer is correct you will be gifted the Brainliest Answer!
Reil [10]
Answer is C...... .....
6 0
4 years ago
Read 2 more answers
What is an example of inert elements​
solmaris [256]
Neon, Helium, Krypton, Xenon, Argon
8 0
3 years ago
Read 2 more answers
Other questions:
  • If my dog has a mass of 30.0 lbm, how much does my dog weigh on top of Mt Everest? (g = 32.042 ft/s2) W = m* g • Therefore, 1 lb
    6·1 answer
  • The water is an example of a ________
    15·2 answers
  • What type of reaction is the following Zn+CuSO4--->Cu+ZnSO4
    11·1 answer
  • I need help on this question please help
    5·2 answers
  • E
    5·1 answer
  • What types of evidence do geologists usually study?
    5·2 answers
  • Calculate the percent of acetic acid in the vinegar. (The density of vinegar is 1.002 g/ml.)
    7·1 answer
  • What is the president for 2020
    11·2 answers
  • A flask contains a 1.00 mole of neon gas and 2.00 moles of argon gas. If the total pressure of the gases is 150.0 kPa, then what
    7·1 answer
  • I need help and don’t understand, where does each chemical reaction go?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!