All categories

3 years ago

Fireworks, KNO3 Give only the names of the elements alphabetically, separating them with commas.

2 answers:

4 0

Answer : The question is to write the elements alphabetically and seperating them with commas.

So in this case for your question of Fireworks , K $NO_{3}$ ,

The answer will be K, N, O.

You have to just differentiate the elements and write them according to the alphabetical order.

Ksenya-84 [330]3 years ago

4 0

Answer: The elements present are potassium, nitrogen and oxygen.

Explanation:

Elements are defined as the substances in which same type of atoms are present. For Example: Sodium, Chlorine etc.

The chemical formula of the compound used in fireworks is $KNO_3$

The chemical name for the compound is potassium nitrate.

This compound is formed by the combination of three elements. In 1 mole of potassium nitrate, 1 mole of potassium atom, 1 mole of nitrogen atom and 3 moles of oxygen atoms are present.

Hence, the elements present are potassium, nitrogen and oxygen.

You might be interested in

What column(s) have 5 valence electrons?

kodGreya [7K]

Answer:

Group 15

Explanation:

The elements of group 15 (column) VA of the periodic table all have electron configurations of s2p3 , giving them five valence electrons. These elements include Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb) and Bismuth (Bi).

6 0

2 years ago

Two groups of students were tested to compare their speed working math problems. Each group were given the same problems. One gr

Bad White [126]

Independent variable: calculators, computers

Dependent variable: speed

3 constants: seat, atmospheric condition, and time.

Control: none

<h3>What are variables</h3>

Variables are of different types in experiments. They can be:

Independent: a variable that is supplied by the researcher and which can be tweaked among different experimental groups to produce different outcomes.
Dependent: variables whose value is dependent on the kind of independent variable supplied by the researcher. It is the actual variable that is measured during the course of experiments.
Constant: all other variables that are kept the same among experimental groups.

Thus, in this case, the independent variable will be the calculator or computer/calculator combination given to the two groups.

The dependent variable will be the speed at which each group finished solving the math problems.

The constant variable will be all other variables supplied to the two groups.

More on variables can be found here: brainly.com/question/20725701

#SPJ1

3 0

1 year ago

Blood serum is typically about 0.0044 M in K+ (aq). Calculate the mass of the potassium ions in 4,459. mL of blood serum. The mo

12345 [234]

Answer:

0.767 g.

Explanation:

Molarity (M) is defined as the no. of moles of solute dissolved in a 1.0 L of the solution.

M = (no. of moles of K⁺)/(Volume of the solution (L).

∵ no. of moles of K⁺ = (mass/molar mass) of K⁺.

∴ M = (mass/molar mass) of K⁺/(Volume of the solution (L).

M = 0.0044 M.

Volume of the solution = 4459.0 mL = 4.459 L.

mass of K⁺ = ??? g.

molar mass of K⁺ = 39.01 g/mol.

∴ mass of K⁺ = (M)((molar mass of K⁺)(volume of the solution (L)) = (0.0044 M)(39.10 g/mol)(4.459 L) = 0.767 g.

7 0

3 years ago

Please help , I’m stuck

Ray Of Light [21]

Answer:

a) I believe it has a volume of 25 ml. I found the value by subtracting 40 from 65.

Hope this Helps!

-kiniwih426

4 0

2 years ago

Which reaction is exothermic? CH4 + 2O2 Right arrow. CO2 + 2H2O + 891 kJ NH4NO3 + H2O + 25 kJ Right arrow. NH4+(aq) + NO3-(aq) 2

Troyanec [42]

Answer:

ch4 + 2o2 gives co2+2h2o +891kj

Explanation:

becoz 891kj heat energy is given out

exothermic process means heat energy is given out/ released

6 0

3 years ago