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
V125BC [204]
3 years ago
14

A block of wood has the mass of 180 grams.it is 10 cm long,6 cm wide and 4 cm thick.what is it’s density?

Chemistry
1 answer:
DochEvi [55]3 years ago
4 0

Answer:

0.75 g/cm³

Explanation:

Given data:

Mass of wooden block =  180 g

Length of block = 10 cm

Width of block = 6 cm

Height or thickness = 4 cm

Density of block = ?

Solution:

Volume of block = height × length × width

Volume of block = 4 cm × 10 cm× 6 cm

Volume of block = 240 cm³

Density of block:

density = mass/ volume

d = 180 g/ 240 cm³

d = 0.75 g/cm³

You might be interested in
Typical frequencies for several types of electromagnetic radiation are given below. Calculate the energy of each type of radiati
marusya05 [52]

Explanation:

The energy of electromagnetic radiation is given by :

E=h\nu

Where, h is the Planck's constant

(a) A gamma ray, \nu = 1.64\times 10^{20}\ Hz

Energy,

E=6.63\times 10^{-34}\times 1.64\times 10^{20}\\E=1.08\times 10^{-13}\ J

(b) A microwave, \nu = 4.95\times 10^{10}\ Hz

Energy,

E=6.63\times 10^{-34}\times 4.95\times 10^{10}\\E=3.28\times 10^{-23}\ J

(c) A AM radio wave, \nu = 2\times 10^{6}\ Hz

Energy,

E=6.63\times 10^{-34}\times 2\times 10^{6}\\E=1.32\times 10^{-27}\ J

Therefore, this is the required solution.

4 0
3 years ago
How do you determine the percent yield of a chemical reaction?
valentinak56 [21]

Answer:

percentage yield =[ experimental yield / theoretical yield] x 100

Explanation:

7 0
3 years ago
How many grams of Na2CO3 are present in 11.8 mL of a solution that is 22.0% Na2CO3 by mass? The density of the solution is 1.10
Sergeeva-Olga [200]

Answer:

The Answer is 2,86 grs Na2CO3

Explanation:

What we have to do is find the mass of Na2CO3 as a pure component or solute. That's because the 11,8 mL are a solution of Na2CO3. This means, the sum between the solute Na2CO3 and water. To find the grams of Na2CO3 as pure component we create a factor series as is shown in the attached file.

Data:

Density of solution (ρ) = 1,10 grs sln Na2CO3/mL sln Na2CO3

Mass Percentage (%) = 22 grs Na2CO3/100 grs sln Na2CO3  

The procedure is explained in the attached file

5 0
3 years ago
When 0.50 L of a 12 M solution is diluted to 1.0 L, what is the resulting molarity?
Lyrx [107]

Answer:

The resulting molarity is 6M.

Explanation:

A dilution consists of the decrease of concentration of a substance in a solution (the higher the volume of the solvent, the lower the concentration).

We use the formula for dilutions:

C1 x V1 = C2 x V2

12 M x 0,5L = C2 x 1,0 L

C2= (12 M x 0,5 L)/1,0 L

<em>C2= 6 M</em>

5 0
3 years ago
What type(s) of atoms make up the element carbon?
ivolga24 [154]
A, as carbon is an atomic substance - element
8 0
3 years ago
Read 2 more answers
Other questions:
  • Consider the reaction: 2nh3(aq)+ocl−(aq)→n2h4(aq)+h2o(l)+cl−(aq) this three-step mechanism is proposed: nh3(aq)+ocl−(aq) ⇌k1k2 n
    5·1 answer
  • For the substituted cyclohexane compound given below, highlight the groups – by clicking on atoms – that will sterically interac
    14·2 answers
  • Several different species of birds, including heron, flamingos, and skimmers, can all successfully feed along the coast because
    8·1 answer
  • When U-238 undergoes radioactive decay by losing an alpha particle, the other product is
    9·2 answers
  • the organ system that allows for movement of the organism as a whole and for internal movement of food through the digestive sys
    15·1 answer
  • What is the pH of a solution prepared by dissolving 0.140 g of potassium hydroxide in sufficient pure water to prepare 250.0 ml
    6·1 answer
  • If you doubled the volume of a sample of gas and
    7·2 answers
  • What theory was Huygens writing about?
    7·2 answers
  • If 12.2 kg of Al2O3(s), 57.4 kg of NaOH(l), and 57.4 kg of HF(g) react completely, how many kilograms of cryolite will be produc
    10·1 answer
  • Once a peptide has been formed between the amino acid attached to the trna in the p site and the amino acid associated with the
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!