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
sergey [27]
3 years ago
11

You carefully weigh out 20.00 g of CaCO3 powder and add it to 81.00 g of HCl solution. You notice bubbles as a reaction takes pl

ace. You then weigh the resulting solution and find that it has a mass of 92.80 g . The relevant equation is:
Chemistry
1 answer:
Zepler [3.9K]3 years ago
3 0

Answer:

The relevant equation is:

CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂

Explanation:

1 mol of calcium carbonate can react to 2 moles of Hydrochloric acid to produce 1 mol of water, 1 mol of calcium chloride and 1 mol of carbon dioxide.

The formed CO₂ is the reason why you noticed bubbles as the reaction took place

You might be interested in
A gas has an initial volume of 15 L. If the temperature increases from 330 K to 450 K, what is the new volume.
Artist 52 [7]

Answer:

20.(45)L or about 20.4545L

Explanation:

PV = nRT

Where:

P - pressure

V - volume

n - number of particle moles

R - a constant

T - temperature in K

We can assume the P and n (and definitely R) stay the same, so we infer that

V_1 = \frac{nRT_1}{P} = 15L\\V_2 = \frac{nRT_2}{P}\\V_1 / V_2 = \frac{nRT_1}{P} / \frac{nRT_2}{P} = \frac{T_1}{T_2}\\\\15L / V_2 = \frac{330K}{450K} = \frac{11}{15}\\\\V_2 = 15L \cdot \frac{15}{11} = 20.(45)L

4 0
3 years ago
What type of star has an absolute brightness of 5 and a surface temperature around 3,000 °C?
pav-90 [236]
From the graph. the answer is
A. supergiants
3 0
3 years ago
Read 2 more answers
Calculate: (a) the weight (in lbf) of a 30.0 lbm object. (b) the mass in kg of an object that weighs 44N. (c) the weight in dyne
belka [17]

Answer:

a) 965,1 lbf

b) 4,5 kg

c) 1,33 * 10^6 dynes

Explanation:

Mass of an object refers to the amount of mattter it cotains, it can be expressed it gr, kg, lbm, ton, etc.

Weight of an object refers to a force, and is the measurement of the pull of gravitiy on an object. It may be definide as the mass times the acceleration of gravity.

                                        w=mg

In Planet Earth, the nominal "average" value for gravity is 9,8 m/s² (in the International  System) or 32,17 ft/s² (in the FPS system).

To solve this problem we'll use the following conversion factors:

1 lbf = 1 lbm*ft/s²

1 N = 1 kg*m/s²

1 dyne = 1 gr*cm/s²   and 1 N =10^5 dynes

1 ton = 907,18 kg

1 k = 1000 gr

a) m = 30 lbm

w = 30 lbm * 32,17 ft/s^{2} = 965, 1 \frac{lmb*ft}{s^{2} } = 965,1 lbf

b) w = 44 N

First, we clear m of the weight equation and then we replace our data.

m = \frac{w}{g} = \frac{44 N}{9,8 \frac{m}{{s}^{2}} } = 4,5 kg

c) m = 15 ton

m=15 ton * \frac{907,18 kg}{1 ton} = 13607,7 kg \\ w = mg = 13607,7 kg * 9,8 m/s2 = 133355,5 N * \frac{10^{5} dynes }{1 N} = 1,33 * 10^{6}dynes

4 0
3 years ago
Where in the eukaryotic cells does succinyl CoA take place​
STatiana [176]
In eukaryotic cells the citric acid cycle takes place in the matrix of the mitochondria.
3 0
3 years ago
A soccer ball is moving to the right. how can you increase the velocity of the ball?
Fantom [35]

Answer: The air will move more quickly around one side, making less pressure on that side of the ball

Explanation:

3 0
2 years ago
Other questions:
  • What's the formula unit for magnesium and sulfur?
    11·2 answers
  • Which of the following is NOT something that Earth's atmosphere protects us from? A. meteoroids B. ultraviolet light C. greenhou
    5·2 answers
  • When measuring volume, why is it important to use the correct tools and units to attain the greatest accuracy?
    11·2 answers
  • The nucleus of the atom contains the greatest concentration of mass of an atom. which arrow is pointing at the nucleus of nitrog
    9·1 answer
  • Jill then wrote the formulas for all the possible compounds that sodium can form with the other ions. What formulas did she writ
    10·1 answer
  • One mole of beryllium (be) contains the same number of atoms as 22.99 g of sodium. There are about 2.007×1023 atoms in 9.0 g al.
    13·1 answer
  • What is an succession? (69) points HELP!
    15·2 answers
  • En el momento en que sienta que su corazón se hunde y sienta el dolor literal en su pecho ... La peor sensación que he tenido. ¡
    13·1 answer
  • What is the % yield when 12g of Mg react with HCl to produce 0.2g of H2?
    8·1 answer
  • How to find resistance of a color code with 4 rings?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!