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
Umnica [9.8K]
3 years ago
14

PLSS HELPP Giving brainliest!! Suppose you place the coefficient 4 before H2O. How many atoms of hydrogen and how many atoms of

oxygen will the formula have?
Chemistry
1 answer:
zlopas [31]3 years ago
3 0

Answer: 8 oxygen atoms and 4 hydrogen atoms. Explanation down below.

Explanation: One molecule of oxygen gas is composed of two oxygen atoms (O2). Here there is four atoms of oxygen gas which in total gives eight oxygen atoms. Same ways One molecule of hydrogen gas is composed of two hydrogen atoms (H2), so 2 atoms of hydrogen gas in total gives four hydrogen atoms. As per the formula of water, 2 (H2) and 1(O) to form a water molecule (H2O). Here there are 4 H2, so divide the number of hydrogen atoms by the number needed per water molecule i.e. 4 / 2 = 2. This means 2 water molecules will be produced.

You might be interested in
H2SO4 +HI → __ H2S+12 +H2O balance the equation
Citrus2011 [14]

Answer:

H2SO4 + 8HI → H2S + 4I2 + 4H2O

3 0
3 years ago
A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 49.mg of MgCl2 into a 100.mL volumetric flask and fil
Flura [38]

Answer:  Molarity of Cl^- anions in the chemist's solution is 0.0104 M

Explanation:

Molarity : It is defined as the number of moles of solute present per liter of the solution.

Formula used :

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{0.049g}{95g/mol}=5.2\times 10^{-4}moles  

V_s = volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

Molarity=\frac{5.2\times 10^{-4}moles\times 1000}{100ml}=5.2\times 10^{-3}mole/L

Therefore, the molarity of solution will be 5.2\times 10^{-3}mole/L

MgCl_2\rightarrow Mg^{2+}+2Cl^-

As 1 mole of MgCl_2 gives 2 moles of Cl^-

Thus 5.2\times 10^{-3}  moles of MgCl_2 gives =\frac{2}{1}\times 5.2\times 10^{-3}=0.0104

Thus the molarity of Cl^- anions in the chemist's solution is 0.0104 M

6 0
3 years ago
a technician mixes 80 ml of a 5% solution with 10 ml of water. what is the final percentage strength of the solution prepared?
Vinvika [58]

A technician mixes 80 ml of a 5% solution with 10 ml of water.  the final percentage strength of the solution prepared is 40 %.

given that :

8 ml of a 5 % solution mix with 10 ml . that means the 80 mL of 5 % solution is diluted with water of 10 mL

therefore, 80 × 5 = 10 × x %

x % = 40 %

Therefore, the final percentage strength of the solution is 40 %

Thus, A technician mixes 80 ml of a 5% solution with 10 ml of water.  the final percentage strength of the solution prepared is 40 %.

To learn more about percentage strength here

brainly.com/question/17130362

#SPJ4

5 0
1 year ago
What are all the possible chemical formulas for-
Sonbull [250]

Answer:

number 7 or 3,5

Explanation:

sana po makatulong po sa inyo

4 0
3 years ago
How does the size of a nanoparticle compare with the size of an atom?
RSB [31]
A nanoparticle is larger than an atom. A nanoparticle is usually made from a few hundred atoms. These  particles range from 1 nanometers to 100 nanometers. On the other hand an atom ranges from 0.1 nanometers to 105 nanometers. Using the sizes above, one can clearly see and understand that an atom is smaller. 
6 0
4 years ago
Other questions:
  • SOMEONE PLEASE HELP ME PLEASE PLEASE ON LETTER A.
    10·1 answer
  • 3. compared to the melting points of ionic compounds, the melting points of molecular solids tend to be ___.
    5·2 answers
  • What mass of iron would be required to react with 10.0L of O2 gas?
    7·1 answer
  • Which statement is true about a neutral solution? Its pH is less than 7. Its pH is greater than 7. It has the same concentration
    9·2 answers
  • Why is co2 collected by downward delivery in preparation​
    7·1 answer
  • Water (2230 g ) is heated until it just begins to boil. If the water absorbs 5.73×105 J of heat in the process, what was the ini
    15·1 answer
  • What happens if you mix Hydrochloric Acid (HCl) and Sodium Bicarbonate (NaHCO3 ) together?
    8·2 answers
  • Which substance is the most common type of SOLVENT?
    7·2 answers
  • For each pair circle the neutral element with the largest atomic radius K or Cs ,Ti or As ,Br or F
    5·1 answer
  • Why did mendeleev leave blank spaces in his version of the periodic table?.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!