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
Fofino [41]
3 years ago
11

Which are examples of science rather than pseudoscience? Check all that apply. People can get rid of hiccups by holding their br

eath. The US surgeon general's 1964 report declared that smoking cigarettes was linked to cancer. Going outside with wet hair will cause a person to catch a cold. The average global temperature of the Earth has increased by almost two degrees in the last century. People should not swim right after eating because they could develop severe muscle cramps and drown.
Chemistry
1 answer:
gogolik [260]3 years ago
5 0

Answer:

The US surgeon general's 1964 report declared that smoking cigarettes was linked to cancer

The average global temperature of the Earth has increased by almost two degrees in the last century.

Explanation:

You might be interested in
A solution of NaF is added dropwise to a solution that is 0.0144 M in Ba 2 . When the concentration of F - exceeds __________ M,
Stella [2.4K]

Answer:

When [F⁻] exceeds 0.0109M concentration, BaF₂ will precipitate

Explanation:

Ksp of BaF₂ is:

BaF₂(s) ⇄ Ba²⁺(aq) + 2F⁻(aq)

Ksp = 1.7x10⁻⁶ = [Ba²⁺] [F⁻]²

The solution will produce BaF₂(s) -precipitate- just when [Ba²⁺] [F⁻]² > 1.7x10⁻⁶.

As the concentration of [Ba²⁺] is 0.0144M, the product [Ba²⁺] [F⁻]² will be equal to  ksp just when:

1.7x10⁻⁶ = [Ba²⁺] [F⁻]²

1.7x10⁻⁶ = [0.0144M] [F⁻]²

1.18x10⁻⁴ = [F⁻]²

0.0109M = [F⁻]

That means, when [F⁻] exceeds 0.0109M concentration, BaF₂ will precipitate

5 0
3 years ago
Substances that cause the oxidation of other substances are
svp [43]
<h3>SUBSTANCE</h3>

==============================

\large  \sf\underline{Question:}

  • Substances that cause the oxidation of other substances are;

==============================

\large  \sf\underline{Answer:}

\qquad \qquad \huge \bold{Option \:  B}

==============================

\large  \sf\underline{Explanation:}

  • Substances that cause the oxidation of other substances are oxidizing agents.

==============================

4 0
2 years ago
Convert the density of water, 1.00 g/mL to lb/ft3. Provide only the numerical value in your answer with the correct number of si
PtichkaEL [24]

Answer:

The density of water 1.00 g/ml=62.43 lbs/ft^3.

Explanation:

Density of water = 1.00 g/mL

1 lb = 453.592 g

1 g=\frac{1}{453.592} lbs

ft^3=28316.8 mL

1 mL=\frac{1}{28316.8} ft^3

Density of the water in lb/ft^3:

\frac{1.00 g}{1 mL}=\frac{1.00}{453.592 } lb\times \frac{28316.8 }{1 ft^3}

=62.43 lbs/ft^3

The density of water 1.00 g/ml=62.43 lbs/ft^3.

3 0
4 years ago
why are the theoretical density values of brass, bronze, and steel reported as a range of densities? how can you categorize thes
Julli [10]

<u>Answer:</u>

<em>Theoretical density values  </em>

  • brass- 8.4-8.73 gm/cm^3
  • bronze- 8.73 g/cm^3
  • steel- 7.75 - 8.05 gm/cm^3

<u>Explanation:</u>

All of these substances are<em> </em>alloys (a substance made from melting two or more substances, one of them usually being a metal). Brass is a combination of copper and zinc, bronze is mostly copper, tin and other non-metals as well and steel is majorly made up of iron and copper. These alloys have various uses and varying importance in different kinds of industries.

6 0
3 years ago
Pressure has the most influence on the solubility of which type of solute?
Scilla [17]
I think that pressure will affect the solubility of gasses the most.  The reason why I think this is that gasses are affected the most by pressure change.  By definition solids and liquids are not easily affected by pressure by how close the molecules are to each other in both of those phases.  

I hope this helps.  Please let me know if you have any further questions or need any clarification.
8 0
3 years ago
Read 2 more answers
Other questions:
  • How many grams of potassium hydroxide are needed to prepare 600 ml of<br> a.450 m koh solution?
    9·1 answer
  • A patient administered 20 mg of iodine-131. How many mg of this radioactive isotope will remain the body after 24 days? NEEDS AN
    8·1 answer
  • A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known mass of KHP was titra
    12·1 answer
  • A solution of 0.133 M KOH is used to titrate 15.0 mL of a H2SO4 solution. Write out the balanced chemical equation and what is t
    6·1 answer
  • Which of the following is the correct calculation for determining the density of an object with a mass of 54 g and a volume of 6
    12·1 answer
  • What happens when the graham crackers and rice krispie bar meet ?
    9·2 answers
  • How many moles are in 12 grams of NH3?​
    11·1 answer
  • 3. A 0.300 g of gas Y at 3.00 atm was filled in a flask with a volume of 82.0 ml. Calculate
    13·2 answers
  • Note the mass of copper(1) oxide formula unit 143.091 what is the mass of 8.250 moles of Cu2O
    7·1 answer
  • What volume in ml of a 0.121 m sodium hydroxide solution is required to reach the equivalence point in the complete titration of
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!