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
ASHA 777 [7]
2 years ago
10

Please do question 9 and 10

Chemistry
1 answer:
DanielleElmas [232]2 years ago
8 0

Answer:

9) 60; 10) 0.2583

Explanation:

9) M(SiO₂)=28+16*2=60 (gr/mol);

10) if one mole is in 60gr., then for 15.5 gr.:

1/60=x/15.5; ⇒ x=15.5/60≈0.2583(mol).

You might be interested in
Which skeleton equation represents a neutralization reaction? Mg + O2 MgO AlCl3 Al + Cl2 Li + HNO3 H2 + LiNO3 HBr + LiOH LiBr +
creativ13 [48]
Neutralization reaction is the reaction between acid and base.
There the neutralization reaction is:

HBr + LiOH ----------> LiBr + H2O.

Hope this helps!
5 0
3 years ago
Read 2 more answers
The atomic theory has been revised many times over the last several hundred years. John Dalton described the atom as a solid sph
frez [133]
<span>As new discoveries are made, existing theories are revised or replaced.</span>
6 0
3 years ago
Read 2 more answers
Which term names elements that are usually shiny and good conductors of heat and electricity?
Sonbull [250]

Elements that are usually shiny and good conductors of heat and electricity are metals.

<h3>What are conductors?</h3>

The conductors are the metal or non metal elements which allow heat and electricity to easily pass through them.

Metals are elements with good conductivity of electric current and heat. Metals have lustre characteristics. They are shiny and bendable just like copper wire, which is a metal.

Hence, elements that are usually shiny and good conductors of heat and electricity are metals.

Learn more about conductors.

brainly.com/question/18084972

#SPJ4

4 0
2 years ago
Radiation fog forms at night when the skies are clear and the relative humidity
LenKa [72]

Answer: A. True

Explanation:

I'm not all the way sure, so please don't hate on me. I looked it up to double check and it should be true.

                                !PLEASE NOT HATE IF IT'S WRONG!

5 0
3 years ago
Which statement describes how pioneer species and climax communities are different?
Monica [59]
That answer for that question is B
4 0
3 years ago
Read 2 more answers
Other questions:
  • In what way is the planet Uranus unique
    14·1 answer
  • Suppose that a certain fortunate person has a net worth of $77.0 billion ($). If her stock has a good year and gains $3.20 billi
    15·1 answer
  • In caves, dripping groundwater containing calcium bicarbonate can form stalactites and stalagmites. When the water is exposed to
    15·2 answers
  • A scientist wants to predict the effect of rise of global air temperature on sea level around the world which method a controlle
    11·1 answer
  • In balancing the nuclear reaction 7535Br → E + 01e, the identity of element E is ________. In balancing the nuclear reaction Br
    6·1 answer
  • An aqueous potassium carbonate solution is made by dissolving 5.51 moles of K 2 CO 3 in sufficient water so that the final volum
    12·2 answers
  • What do the group 1 elements form when they react with oxygen?
    15·1 answer
  • Which element was first discovered in space before it was discovered on Earth?
    8·2 answers
  • How many atoms are in 4.5 g of AICI3?
    11·1 answer
  • What type of compound is composed of covalently bonded atoms and has a high melting point?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!