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
Arisa [49]
3 years ago
15

Select all the correct answers.

Chemistry
1 answer:
Lelu [443]3 years ago
3 0

Answer: A. The farther a planet is from the Sun, the longer its orbital period is, and D. Planets with greater mass tend to have more moons.

Explanation: trust

You might be interested in
Sound _____.
AysviL [449]

Answer:

Sounds travels in transverse waves requires a medium to travel through

4 0
2 years ago
Read 2 more answers
How is a universal pH indicator made
Arte-miy333 [17]
Hey!! your answer is -----

universal pH indicator is made up by the combination of several types of indicator.



hope you like ______★
3 0
2 years ago
Which type of energy uses the photoelectric effect?
ikadub [295]

Answer:

My lovely people the answer is SOLAR

Explanation:

i just know

8 0
2 years ago
If 42.7 of 0.208 M hydrochloric acid are needed to completely neutralize a solution of calcium hydroxide, how many grams of calc
Montano1993 [528]

Answer:

0.329 g

Explanation:

In the context of this problem, we have a chemical reaction between hydrochloric acid and calcium hydroxide. HCl is the acid here and calcium hydroxide is the base. Hence, we have an acid-base reaction, also known as neutralization reaction.

In a neutralization reaction, water is produced as a product, as well as a salt that we obtain after we exchange the cations: calcium bonds to chloride and hydrogen bonds to hydroxide (the latter is the formation of water). This means we also produce calcium chloride as a product. The overall reaction represents this as:

Ca(OH)_2(aq)+2 HCl (aq)\rightarrow CaCl_2 (aq)+2 H_2O (l)

Firslt of all, we wish to find the number of moles of HCl present. Having molarity and volume, this is done by applying the molarity formula. It states that molarity is equal to the rate between moles and volume:

c_{HCl}=\frac{n_{HCl}}{V_{HCl}}

Rearranging for moles of HCl, n:

n_{HCl}=c_{HCl}V_{HCl}

Based on stoichiometry of the balanced chemical equation, notice that 1 mole of calcium hydroxide reacts with 2 moles of HCl, meaning:

n_{Ca(OH)_2}=\frac{1}{2} n_{HCl}=\frac{1}{2}c_{HCl}V_{HCl}

Now that we have the expression for moles, we may also express moles of calcium hydroxide as the ratio between its mass and molar mass:

n_{Ca(OH)_2}=\frac{m_{Ca(OH)_2}}{M_{Ca(OH)_2}}

Using the last two equations, we see that:

\frac{1}{2}c_{HCl}V_{HCl}=\frac{m_{Ca(OH)_2}}{M_{Ca(OH)_2}}\\\therefore m_{Ca(OH)_2}=\frac{1}{2}c_{HCl}V_{HCl}M_{Ca(OH)_2}

Substitute the given data, as well as the molar mass of calcium hydroxide:

m_{Ca(OH)_2}=\frac{1}{2}\cdot0.208 M\cdot0.0427 L\cdot74.093 g/mol=0.329 g

8 0
3 years ago
Four students measure the length of a paper clip whose actual length is 3.2 cm. whose measurements are precise but not accurate?
Bingel [31]

Answer:

A. Samuel

Explanation:

although he is not right he gets the same measurement several times

8 0
3 years ago
Read 2 more answers
Other questions:
  • Select all that are true statements for RNA*
    8·2 answers
  • Why is mendeleevâs periodic table considered a viable scientific model?
    7·1 answer
  • Determine the answer for the equation below with correct number of significant figures: 3.215 x 13.2 ÷ 0.218 = ________
    9·2 answers
  • What is a colligative property?
    15·1 answer
  • What type of hybridization leads to a bent molecular geometry and a tetrahedral electron domain geometry
    5·1 answer
  • Express the frequency in inverse seconds of n=4 to n=3
    14·1 answer
  • Q- Which two positions show the location of the moon in its gibbous phases as seen from Earth?
    14·1 answer
  • . Deltas form mainly due to
    7·2 answers
  • Why might having mud in an ecosystem be important?
    12·1 answer
  • The video states that in order to use the triangulation method needs a certain number of seismograph stations. How many stations
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!