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Anuta_ua [19.1K]
3 years ago
6

HELP ME PLZ!!

Chemistry
1 answer:
WITCHER [35]3 years ago
5 0

Answer:Barium

Explanation:

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What does a circle filled in with a dark color represent in a pedigree chart?
Alina [70]

A circle or square that is not shaded indicates that a person neither expresses the trait nor is a carrier of the trait. within a family, is used. In a pedigree, a circle represents a female, and a square represents a male. A filled-in circle or square shows that the individual has the trait being studied.

7 0
3 years ago
Which of the following is a heterogeneous mixture? Air. Salt water. Steel. Soil.
kicyunya [14]

Answer: Heterogenous mixtures are the ones in which we can see the different components clearly. Air is considered to be homogenous, because we don't see the different noble gases' particles floating around. Salt water is also homogenous, because salt dissolves almost completely into water, becoming hard to see without the proper equipment salt particles in it. Steel is also homogenous, since the metals that compose it are mixed during the heating. The only heterogenous would be soil, because we can see different particles in it, with different sizes, shapes, colors, etc without having to use special equipment.

3 0
3 years ago
Read 2 more answers
COPY out the following sentences and fill in the gaps.
malfutka [58]

Answer:

1. Hydrogen ions; acidic

2. Alkali; hydroxide ions; alkaline

3a. Sulfuric acid --> 2 Hydrogen ions + sulfate ion

H₂SO₄ --> 2H+ + SO₄²-

3b. Sodium hydroxide --> Sodium ion + Hydroxide ion

NaOH --> Na+ + OH-

Explanation:

1. Sulfuric acid releases hydrogen ions in solution. This makes the solution acidic.

Acids produce hydrogen ions when dissolved in aqueous solutions.

2. Sodium hydroxide is an alkali. It releases hydroxide ions in solution. This makes the solution alkaline.

Alkalis are soluble bases that produce hydroxide ions in solution.

3a. Sulfuric acid --> 2 Hydrogen ions + sulfate ions

H₂SO₄ --> 2H+ + SO₄²-

The equation above is for the ionization of sulfuric acid

b. Sodium hydroxide --> Sodium ion + Hydroxide ion

NaOH --> Na+ + OH-

The equation above is for the ionization of sodium hydroxide

4 0
3 years ago
Consider the following equation: K + Br → KBr. How many grams of KBr can you make with 1.25g of K?
Dmitry [639]

Answer:

\fbox{3.81 \: grams}

Explanation:

First consider the mol to mol ratio, the mol of a substance is simply the count of atoms in respect to avagadros number (approx. 6.02 × 10²³ molecules) in the period table. 1 mol of an element is simply it's mass count in the periodic table.

5 0
3 years ago
How many moles of NaOH are there in 3 mL of 9.0M NaOH?
Mademuasel [1]

Answer:

0.027mol

Explanation:

9M NaOH tells us that there is 9 mol of NaOH per L of NaOH

converting 3mL to L = 0.003L

0.003L * 9 mol/L = 0.027mol

5 0
4 years ago
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