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
Greeley [361]
3 years ago
11

Mendeleev arranged the known chemical elements in a table according to increasing

Chemistry
1 answer:
vesna_86 [32]3 years ago
8 0
Atomic mass. Which is the number of protons and neutrons combined.
You might be interested in
Which of these is a characteristic of science? (5 points) Question 1 options: 1) It cannot be reproduced by any scientist. 2) It
Alex17521 [72]

Answer:

3

Explanation:

It is based on empirical evidence

4 0
3 years ago
30. How many types of chemical reactions are there?
Nadusha1986 [10]

Answer:

B. Five

Hope this helps........

8 0
3 years ago
Read 2 more answers
A field worker is exposed to a xylene for a duration of 8 weeks at 40 hrs/wk. The concentration of xylene in the workplace is 40
Andrej [43]

Answer:

The chronic daily intake during the period of exposure is most nearly 0.012 mg/kg day.

Explanation:

Number of hours worker exposed to xylene = 40 hr/week\times 8 week = 320 hours

The concentration of xylene in the workplace =40 \mu g/m^3

The worker is inhaling air at a rate of 0.9 m^3/hr.

Amount xylene inhaled by worker in an hour :

= 40\mu g/m^3\times 0.9 m^3/hr=36 \mu g/hr

Amount xylene inhaled by worker in 320 hours:

36 \mu g/hr\times 320 hr=11,520 \mu g=11,520\times 0.001 mg=11.520 mg

1 μg = 0.001 mg

Amount xylene inhaled by worker in 320 hours = 11.520 mg

1 day = 24 hours

Amount xylene inhaled by worker in 1 day:

\frac{24}{320}\times 11.520 mg=0.864 mg

Assuming 70 kg body mass, the chronic daily intake of xylene :

\frac{0.864 mg/day}{70 kg}=0.01234 mg/ kg day\approx 0.012 mg/ kg day

The chronic daily intake during the period of exposure is most nearly 0.012 mg/kg day.

5 0
2 years ago
according to the balanced chemical equation below,how many grams of h20 are produced if 3.98g of co2 were produced. 2C18H18 + 25
telo118 [61]

Answer:

Primero debes usar los gramos de co2 y luego buscar su peso molecular, luego de eso usar la relación de moles entre CO2 y H2O y por último buscar el pm del H2O pata ver cuantos gramos de produce.

Explanation:

3 0
3 years ago
Sodium chloride reacts with copper sulfate to produce sodium sulfate and copper chloride. mc011-1.jpg This equation represents a
Anarel [89]
This is a double replacement because both Copper and Sodium reacted with each other compounds , hence "double"
7 0
3 years ago
Read 2 more answers
Other questions:
  • What is the [OH^+] ina solution that has a pH=4.02
    14·1 answer
  • Which statement about the binding of enzymes and substrates is correct? - Substrate molecules fit into the active site of an enz
    11·1 answer
  • Write a balanced equation for the reaction between sulphuric acid and potassium hydroxide
    11·1 answer
  • What is the ph of a 4.8 m pyridine solution that has kb = 1.9 × 10-9? the equation for the dissociation of pyridine is?
    15·2 answers
  • Which statement correctly describes a physical change?
    13·1 answer
  • PLS HELP FAST WILL GIVE BRAINLEST
    11·1 answer
  • Calculate the wavelength of radiation with a frequency of 8.0 x 10^14 Hz.
    5·1 answer
  • Organic compounds that are synthesized by human cells
    5·1 answer
  • How many grams in 4.5 moles of H2O?
    7·1 answer
  • Mention three sources of light​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!