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
AlladinOne [14]
3 years ago
12

Indicate if the following statements are TRUE (T) or FALSE (F):

Chemistry
1 answer:
Aleks [24]3 years ago
3 0

Answer:

a) T

b) T

c) F

d) F

e) T

f) T

g) T

h) F

I) F

j) F

k) F

l) F

Explanation:

The w/v concentration is obtained from, mass/volume. Hence;

%w/v= 50/1000= 5%

In the %w/w we have;

25g/100 g = 25% w/w

In combustion reaction, energy is given out hence it is exothermic.

Neutralization reaction yields a salt and water

% by mass of carbon is obtained from;

8× 12/114 × 100 = 84.1%

All the ionic substances mentioned have very low solubility in water.

One mole of a substance contains the Avogadro's number of each atom in the compound.

There are two iron atoms so one mole contains 2× 55.85 g of iron.

Some sulphates such as BaSO4 are insoluble in water.

Halides are soluble in water hence NaI is soluble in water.

The equation does not balance with the given coefficients because the number of atoms of each element on both sides differ.

The equation represents a decomposition of calcium carbonate as written.

You might be interested in
Chemistry Question! 20 Points!
Delvig [45]

Answer:

A

Explanation:

I guess it's a, because nuclear decay is likely to occur when either the mass or atomic number is greater than 83.

7 0
3 years ago
Help with this question
boyakko [2]
True. Our earth Is getting hotter due to global warming.
6 0
3 years ago
hich of the following is TRUE? Group of answer choices A neutral solution does not contain any H3O+ or OH- A neutral solution co
Studentka2010 [4]

Answer:

a basic solution has [OH-] > [H3O+]

8 0
3 years ago
What orbital type is being filled throughout the transition metal B Groups?
Nataliya [291]

Answer:

The correct answer is: d-orbital

Explanation:

The transition metals are the chemical elements that belong to the B-group of the periodic table, from group 1B to 8B. The B-group is located between the groups IIA and IIIA in the periodic table.

The general electronic configuration of the chemical elements belonging to this group is (n-1) d¹⁻¹⁰ ns⁰⁻², because of the <u>partially filled d-subshell</u> in the ground state or excited state. <u>Therefore, the transition metals are refereed as the </u><u>d-block elements</u><u>.</u>

8 0
2 years ago
Why is it useful to use moles to measure chemical quantities?
drek231 [11]
<span>Because it is defined such that the mass of Avogadro's number of particles (atoms or molecules) of a substance (the molar mass) is equal to the sum of the numerical values of the atomic masses of its constituent elements</span>
5 0
3 years ago
Other questions:
  • An important natural and metallic resource is ?
    9·2 answers
  • During a medical screening, lung capacity testing is a standard procedure.<br> a. True<br> b. False
    15·1 answer
  • Water vapor is condensed steam. <br><br> True <br> False
    10·1 answer
  • We might think of a porous material as being a composite wherein one of the phases is a pore phase. Estimate upper and lower lim
    11·1 answer
  • What is the chemical formula for propane in butane?help hurry I’m doing it right know please
    14·1 answer
  • 1. Determinati masa moleculara, raportul atomic si raportul de masa pentru oxidul de aluminiu 2. Determinati compozutia procebtu
    5·1 answer
  • A volume of gas at 1.10 atm was measured at 507 ml. What will be the volume if the pressure is adjusted to 1.90
    12·1 answer
  • Why do girls like boys who act rude more than boys that are actually nice!
    10·2 answers
  • Calculate the number of grams in 4.56 x 1026 atoms of sodium phosphate. Be sure to balance the charges of sodium phosphate. Help
    14·1 answer
  • Corrections here: 1. When calcium reacts with water, the temperature changes from 18c to 39c
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!