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
Elena-2011 [213]
2 years ago
7

Questions are in the image B and 4i

Chemistry
1 answer:
Keith_Richards [23]2 years ago
7 0
Dimitri mastered in Elements
You might be interested in
What can u say about the sizes of all the atoms in a piece of carbon​
vlada-n [284]

Answer:

all atoms must have 6 protons to be a carbon atom

Explanation:

brainliest?

4 0
2 years ago
How many grams of neutral salt will be obtained in the reaction of calcium oxide with 200 cm 3 of phosphoric acid solution whose
katen-ka-za [31]

Answer:

9.3 g of Ca3(PO4)2

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

3CaO + 2H3PO4 —> Ca3(PO4)2 + 3H2O

Next, we shall determine the number of mole of H3PO4 present in 200 cm³ of 0.3 mol/dm³ phosphoric acid (H3PO4) solution. This can be obtained as follow:

Molarity of H3PO4 = 0.3 mol/dm³

Volume = 200 cm³ = 200 cm³/1000 = 0.2 dm³

Mole of H3PO4 =?

Molarity = mole /Volume

0.3 = mole of H3PO4 /0.2

Cross multiply

Mole of H3PO4 = 0.3 × 0.2

Mole of H3PO4 = 0.06 mole

Next, we shall determine the number of mole of the salt, Ca3(PO4)2, obtained from the reaction. This can be obtained as shown below:

3CaO + 2H3PO4 —> Ca3(PO4)2 + 3H2O

From the balanced equation above,

2 moles of H3PO4 reacted to produced 1 mole of Ca3(PO4)2.

Therefore, 0.06 moles of H3PO4 will react to produce = (0.06 × 1)/2 = 0.03 mole of Ca3(PO4)2.

Thus, 0.03 mole of Ca3(PO4)2 is produced from the reaction.

Finally, we shall determine the mass of Ca3(PO4)2 produced as follow:

Mole of Ca3(PO4)2 = 0.03 mole

Molar mass of Ca3(PO4)2 = (40×3) + 2[31 + (16×4)]

= 120 + 2[31 + 64]

= 120 + 2[95]

= 120 + 190

= 310 g/mol

Mass of Ca3(PO4)2 =?

Mole = mass /Molar mass

0.03 = mass of Ca3(PO4)2 / 310

Cross multiply

Mass of Ca3(PO4)2 = 0.03 × 310

Mass of Ca3(PO4)2 = 9.3 g

Thus, 9.3 g of Ca3(PO4)2 was obtained from the reaction.

6 0
2 years ago
Describe the factors which make an organism living
Anvisha [2.4K]

<em>All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, adaptation, growth and development, homeostasis, energy processing, and evolution. When viewed together, these characteristics serve to define life.</em>

<em>Hey</em><em> </em><em>Mate</em><em>!</em><em> </em><em>!</em><em> </em><em>!</em><em> </em><em>I</em><em> </em><em>hope</em><em> </em><em>this</em><em> </em><em>was</em><em> </em><em>helpful</em><em> </em><em>if</em><em> </em><em>yes</em><em> </em><em>please</em><em> </em><em>mark</em><em> </em><em>me</em><em> </em><em>brainliest</em><em>. </em>

6 0
3 years ago
12. How much mass is in a 3.25-mole sample of NH 4 OH? A. 10.8 g B. 34.0 g C. 35.1 g D. 114 g
Galina-37 [17]

Answer:

D. 114 g

Explanation:

  • NH4OH molecular weight. Molar mass of NH4OH = 35.0458 g/mol This compound is also known as Ammonium Hydroxide.
  • Convert grams NH4OH to moles or moles NH4OH to grams. Molecular weight calculation: 14.0067 + 1.00794*4 + 15.9994 + 1.00794.
8 0
3 years ago
Explain why the place of aluminum in the reactivity wagon seems to be unsuitable.
Step2247 [10]

Answer:

Acids react with most metals.

When an acid reacts with a metal, the products are a salt and hydrogen.

This is the general word equation for the reaction: metal + acid → salt + hydrogen

Explanation:

5 0
2 years ago
Other questions:
  • Please help! I need to know what type of energy transfer each of these things are (CHOOSE FROM CONDUCTION, CONVECTION OR RADIATI
    7·1 answer
  • What is a base used in toothpaste?
    9·2 answers
  • Is petrol hard to make
    9·1 answer
  • Escriba las fórmulas semi desarrollada y global correspondientes a: 2,3-dimetil-1-penteno
    8·1 answer
  • What is the mass of 2.80 grams of H2O
    10·1 answer
  • In the SI system of units, the mole is one of seven base units. It is frequently used in chemical calculations. However, a mole
    12·1 answer
  • Help plz I don’t get it
    13·2 answers
  • If 7.45g of N2 and 36.5mL of 0.150M O2 react together, how many grams of N2O gas will be produced?
    6·1 answer
  • What is the pow of a solution that has a hydroxide ion concentration of 4.82 x 10-6 M?
    9·1 answer
  • Given 6.25 mol H2O, determine the number of molecules
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!