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
Ira Lisetskai [31]
3 years ago
6

Please help me school ends tomorrow

Chemistry
1 answer:
wolverine [178]3 years ago
3 0

Answer:

<h2>D) clapping hands </h2>

Explanation:

hope it's helpful

You might be interested in
What trend in atomic radius occurs down a group on the periodic table? What causes the trend?
Svetlanka [38]

Explanation:

the further down the group you go, the larger the radius becomes. its caused by the amount of electrons needed to equal out the charge of the nucleus

3 0
3 years ago
If a 25 kg car accelerates at a speed of 100 m/s², what will the force of the car be?
igomit [66]

Answer:

<h2>The answer is 2500 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration is given by

<h3>Force = mass × acceleration</h3>

From the question

mass of car = 25 kg

acceleration = 100 m/s²

The force is

Force = 25 × 100

We have the final answer as

<h3>2500 N</h3>

Hope this helps you

5 0
4 years ago
Following reactions<br>FeSO4+KOH<br>​
prohojiy [21]

Explanation:

FeSO _{4} + \: KOH \: →K _{2}SO _{4} \:  +  \: Fe(OH) _{2}

5 0
3 years ago
The chemical formula of aspirin is C9H8O4. What is the mass of 0.40 mol<br> of aspirin?​
dybincka [34]

Answer:

\boxed {\boxed {\sf About \ 72 \ grams }}

Explanation:

To convert from moles to grams, we must use the molar mass (also known as the gram formula mass).

First, look up the molar masses of the elements in the formula.

  • C: 12.011 g/mol
  • H: 1.008 g/mol
  • O: 15.999 g/mol

Next, multiply by the subscript, because it tells us the number of atoms of each element in the formula.

  • C₉: 4(12.011 g/mol)= 108.099 g/mol
  • H₈: 8(1.008 g/mol)= 8.064 g/mol
  • O₄: 4(15.999 g/mol)= 63.996 g/mol

Add the values.

  • 108.099 + 8.064+63.996=180.159 g/mol

Use this molar mass as a ratio.

\frac {180.159 \ g \  C_9H_8O_4}{1 \ mol \ C_9H_8O_4}

Multiply by the given number of moles, 0.40

0.40 \ mol \ C_9H_8O_4 *\frac {180.159 \ g \  C_9H_8O_4}{1 \ mol \ C_9H_8O_4}

The units moles of aspirin cancel.

0.40  *\frac {180.159 \ g \  C_9H_8O_4}{1 }

72.0636 \ g \ C_9H_8O_4

The original number of moles has 2 sig figs (4 and 0), so answer must have the same. For the number we calculated, it is the ones place. The 0 in the tenth place tells us to leave the 2.

72 \ g

5 0
3 years ago
2 horizontal and parallel lines are intersected by 2 diagonal lines to form a triangle with exterior angles. The top angle of th
Sophie [7]

Answer:

x = 63

z = 117

x + z = 180

Explanation:

edg 2020

5 0
3 years ago
Other questions:
  • Should i do the anatomy of a dog for my science fair project or is that too boring?
    11·2 answers
  • What's the "p" process in chemistry
    10·1 answer
  • Select the answer which shows the correct order, slowest to fastest, of the relative rate of diffusion of the gases.
    10·2 answers
  • How often do you need to make a fresh bleach solution?
    7·1 answer
  • While I was jogging, I was able to run 5 miles in thirty minutes. From this information, we can determine my
    15·2 answers
  • Xian drew a diagram to compare deletion mutations and substitution mutations. Which label belongs in the area marked "X"? may ch
    9·2 answers
  • Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g) If you have 4 moles of zinc and 4 moles of hydrochloric acid, which of these would be the l
    15·1 answer
  • An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate.The complete ionic equation contai
    5·1 answer
  • HCI
    6·2 answers
  • What is the number of moles of kf in a 29-gram sample of the compound.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!