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
Yakvenalex [24]
3 years ago
13

2Mg + O2 mc019-1.jpg 2MgO

Chemistry
2 answers:
Murljashka [212]3 years ago
8 0
In order to compute the mass of MgO formed, Niven must first convert grams of Mg to moles.
The chemical reaction equation provides a ratio between the moles of magnesium and magnesium oxide. Thus, in order to determine the amount of MgO formed, the amount of Mg reacted must be known.

Solving:
Moles Mg = 28 / 24 = 1.17

Moles of MgO = 1.17
Mass of MgO = 1.17 * 40.3
Mass of MgO = 47.2 grams
Svetllana [295]3 years ago
8 0

Answer:

The answer is b, convert grams of Mg to moles.

Explanation:

You might be interested in
Two or more velocities added by......​
alexdok [17]

speed and direction in which an object is moving. both speed and direction of motion. is a vector. two or more velocities add by velocity addition.

5 0
3 years ago
A 15.75 g piece of iron absorbs 1097 joules of heat energy, and its temperature changes from 25°C to 177°C. Calculate the specif
vekshin1

The answer for the following problem is mentioned below.

Explanation:

Given:

mass of iron (m) = 15.75 grams

heat (q) = 1097 J

initial temperature (t_{1}) = 25°C

final temperature (t_{2}) = 177°C

To find:

specific heat (c)

We know;

 c = q ÷ mΔT

where;

c represents the specific heat

q represents the heat

m represents the mass

t represents the temperature

c = \frac{1097}{15.75 * (177-25)}

c = 0.45 J/kg°C

<u><em>Therefore the specific heat capacity of iron is 0.45 J/kg°C.</em></u>

8 0
3 years ago
Hey, I’ll give brainliest. Just please help.
Andre45 [30]

Answer:

C

Explanation:

8 0
3 years ago
The answer to the problem: 3.542 - 2.1 = _____, written to the correct number of significant digits is:
VMariaS [17]

1.442 or 1.4

Round it to the nearest number

7 0
2 years ago
Read 2 more answers
Electric power is measured in watts (1 W = 1 J/s). About 95% of the power output of an incandescent bulb is converted to heat an
nlexa [21]

Answer:

9.430 * 10¹⁷ protons per second whill shine on the book from a 62 W bulb

Explanation:

To answer this question, first let's calculate the energy of a single photon with a wavelength (λ) of 504 nm:

E = hc/λ

Where h is Planck's constant (6.626*10⁻³⁴ J·s) and c is the speed of light (3*10⁸ m/s).

E = 6.626*10⁻³⁴ J·s * 3*10⁸ m/s ÷ (504*10⁻⁹m) = 3.944 * 10⁻¹⁹ J.

So now we can make the equivalency for this problem, that

<u>1 proton =  3.944 * 10⁻¹⁹ J</u>

Now we convert watts from J/s to proton/s:

1 \frac{J}{s}*\frac{1proton}{3.944*10^{-19}J}=2.535*10^{18} \frac{proton}{s} = 1 W

Solving the problem, a 62 W bulb converts 5% of its output into light, so:

  • 62 * 5/100 = 3.1 W

3.1 watts are equal to [ 2.535*10¹⁸ proton/s * 3.1 ] = 7.858 * 10¹⁸ proton/s

Of those protons per second, 12% will shine on the chemistry textbook, thus:

7.858 * 10¹⁸ proton/s * 12/100 = 9.430 * 10¹⁷ protons/s

8 0
3 years ago
Other questions:
  • LaShawna and her family went to Yellowstone National Park. They saw a spring called Green Dragon Spring. Steam was rising off th
    13·2 answers
  • Which shows the correct relationship? A. small K = positive ∆G = positive E0cell B. small K = positive ∆G = negative E0cell C. l
    15·2 answers
  • 2. When a chemical reaction occurs, we often get a combination of
    6·1 answer
  • What happens when sodium and sulfur combine
    6·2 answers
  • In most mirrors, the virtual image appears to come from behind the mirror. True False
    5·1 answer
  • If the male monster has a genotype of HH, will he have horns?<br> yes or no
    10·2 answers
  • How can carbon dating be used to study the history of the earth?
    6·1 answer
  • What is the chemical formula for zinc?
    14·1 answer
  • Earth's seasons occur due to the tilt of the earth and it's revolution around the sun.
    13·1 answer
  • As part of an investigation, students combined substances in a beaker to observe
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!