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
madam [21]
3 years ago
15

In the chemical equation 2Mg(s) + O2(g) ? 2MgO(s),

Chemistry
1 answer:
cluponka [151]3 years ago
4 0
The correct answer is D
You might be interested in
The density of concentrated ammonia, which is 28.0% w/w nh3, is 0.899 g/ml. what volume of this reagent should be diluted to 1.0
vlada-n [284]

Answer: 2.4 ml

Solution :

Molar mass of NH_3 = 17 g/mole

Given,: 28% w/w of NH_3 solution means 28 g of ammonia in 100 g of solution.

Mass of solution = 100 g

Now we have to calculate the volume of solution.

Volume=\frac{Mass}{Density}=\frac{100g}{0.899g/ml}=111.2ml  

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

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

where,

n = moles of solute NH_3=\frac{\text {given mass}}{\text {molar mass}}=\frac{28}{17}=1.65moles

V_s = volume of solution in liter = 0.11 L

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

Molarity=\frac{1.65moles}{0.11L}=15mole/L

Using molarity equation:

M_1V_1=M_2V_2

15\times V_1=0.036\times 1.0\times 10^{3}

V_1=2.4ml

6 0
3 years ago
How much heat is required to change temperature of 2g of water from 34°C to 68°C? (Water has a specific heat of 4.18)
statuscvo [17]

Answer: B

Explanation:

To find the amount of heat required, you would use q=mcΔT.

q=2g(4.18J/g°C)(68-34°C)

q=284.2 J

*Please ignore the capital A in the equation. I can't find a way to type in the degree sign into the equation without the A appearing.

4 0
3 years ago
Image please. 30 POINTS
Galina-37 [17]
Q14: Our sun
Q15: The strong magnetic reaction in our atmosphere
3 0
3 years ago
Write the formula for the conjugate base for the following acids. <br>Thank you ​
Llana [10]

Answer:

See the answer and explanation below , please.

Explanation:

A conjugate base is defined as that formed after an acid donates its proton.

For each article, a continuation of the conjugate bases (highlighted in bold), for dissociation in water:

a) HF + H20 --> F- + H30+      

b) H20+ H20 --> OH-  + H30+

C)H2PO3-  + H20--> HPO3 2-   + H30+

d) HSO4- + H20 -->  SO4 2- + H30+

E) HCL02 + H20 --> CLO02 -   + H30+

7 0
4 years ago
Read 2 more answers
Which compound are ionic and which are covalent? (N2) (CCl4) (SiO2) (AlCl3) (CaCl2) (LiBr)
muminat
Covalent compounds: N2, CCl4, SiO2 and AlCl3.

Ionic compounds: CaCl2 and LiBr.

Hope this helps!
3 0
4 years ago
Other questions:
  • 1. _______ are atoms that carry an electric charge.
    9·2 answers
  • Carbon tetrachloride, CCl4, was once used as a dry cleaning solvent, but is no longer used because it is carcinogenic. At 55.8°C
    6·1 answer
  • What type of physical change is it when a liquid turns into a solid and a solid turns into a liquid
    11·1 answer
  • The process of isotopes breaking down and emitting particles, such as alpha or beta, to form a new substance.
    14·2 answers
  • To balance a chemical equation, one: a. changes the subscripts of the formulas. b. changes the coefficients of the formulas. c.
    9·1 answer
  • Do u ever fell like u ani't good enough for anybody
    7·2 answers
  • In the late 1400s,ties among people of the same formed the basics of most aspects of life in rural west Africa
    15·1 answer
  • Which best describes the electron behavior in metallic bonding?
    10·1 answer
  • According to the atomic theory, ________. Group of answer choices a compound can contain different numbers of atoms as long as i
    15·2 answers
  • Given the unbalanced equation:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!