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4 years ago

What is an evenly distributed, uniform mixture called?

Chemistry

1 answer:

Ivenika [448]4 years ago

6 0

Answer:

The correct answer is Option

B. A homogeneous mixture

Explanation: Mixture is solution which is made of two or more than two substances which are combined only physically not chemically. There are two types of mixture i. e. Homogeneous mixture and heterogeneous mixture. Homogeneous mixture is a mixture in which the substances which are combined are uniform in appearance and heterogeneous mixture is a mixture in which substances are suspended in the solution and easily differentiated.

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Which of the substances below would dissociate into ions when dissolved in water? Select all that apply.

dusya [7]

Answer:

B. NaBr

D. KOH

Explanation:

Below is the solubility rules given for you knowledge.

Salts of

Group 1 elements are soluble( $Li^+, Na^+, K^+,Cs^+, Rb^+$ )
Ammonium ion is soluble ( $NH4^+$ )
The nitrate are generally soluble( $NO3^-)$

of Cl- , Br- , and I- are soluble, except Ag+ , Pb+2, and (Hg2)+2
most sulfate are soluble, except Ba+2, Ca+2,Pb+2, Ag+, Sr+2.
most hydroxide salts are only slightly soluble, except NH+4, Li+, Na+, K+
Most carbonates are insoluble (CO3 2-) Except group 1 and NH+4
most phosphate are insoluble except group 1 and NH+4

so using the rules above

NaBr , KOH are soluble, Pb(OH)2 is slightly soluble and AgCl is not soluble.

7 0

3 years ago

WILL GIVE BRAINLIST NEED ASAP

Nookie1986 [14]

V=n/M

V=2.5/6=0.416 L

7 0

3 years ago

Write a half-reaction for the oxidation of the manganese in MnCO3(s) to MnO2(s) in neutral groundwater where the carbonate-conta

Leokris [45]

Answer:MnCO3+2H2O----->MnO2+ HCO3-+2e-+3H+

Explanation:The equation to be balanced is

MnCO3 ------> MnO2+HCO3-

The oxidation number of Mn changes from +2 in MnCO3 to +4 in MnO2

Therefore two electrons must be added to the right as shown below:

MnCO3 -------> MnO2+ HCO3-+ 2e-Now,there is one negative charge HCO3- and 1 negative charge on the two electrons making a total of -3 charges on the right. There is zero charge on the left.

To balance the equation,add3H+on the right,to cancel out the charges.

MnCO3 --------> MnO2+HCO3-+2e-+3H+

Adding H2O to balance Hydrogen and Oxygen atoms:

MnCO3+2H2O ------->MnO2+HCO3-+2e-+3H+

3 0

4 years ago

Which option correctly compares beta decay and gamma decay? (1 point)

timofeeve [1]

The option which correctly compares beta decay and gamma decay is Beta-decay releases a particle, while gamma decay only reduces the energy level. Beta-decay is a form of nuclear fission, but gamma decay is not.

Beta decay is a form of radioactivity in which an electron is released. The electron could be positively charged(positron) or negatively charged.

Also, beta decay also occurs when there is nuclear fission of a substance in which a larger atom breaksdown into a smaller atom and releases energy.

Gamma decay is a form of radioactivity in which photons are released without the release of a particle from the atom.

Since a photon is released, only the energy level of the atom reduces and is thus not a form of nuclear fission

So, the option which correctly compares beta decay and gamma decay is Beta-decay releases a particle, while gamma decay only reduces the energy level. Beta-decay is a form of nuclear fission, but gamma decay is not.

Learn more about beta and gamma decay here:

brainly.com/question/13886367

4 0

3 years ago

Write a single lewis structure that obeys the octet rule for so3 and assign the formal charges on all the atoms. (there should b

Stella [2.4K]

SO3 for the formal charges, we have: for the single-bonded oxygens F.C. = 6 - [1/2(2) + 6] = -1 for the double-bonded oxygen F.C. = 6 - [1/2(4) + 4] = 0 for the sulfur F.C. = 6 - [1/2(8) + 0] = 2 Again, the formal charges add to zero. The oxidation numbers of O and S are -2 and +6, respectively. Note the three resonance forms!

3 0

4 years ago