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3 years ago

Which of the following statements is true?

Chemistry

2 answers:

Black_prince [1.1K]3 years ago

7 0

Answer:

A. Genes make up chromosomes.

Explanation:

Genes are strung together on chromosomes. Chromosomes are found in the nucleus of the cell. Different organisms have different numbers of chromosomes.

rjkz [21]3 years ago

3 0

its A. Genes make up chromosomes. it did it on study island..... i did the other answer the other person got and i got it wrong....and then it told me it was A. Genes make up chromosomes.

HOPE I COULD HELP

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replacing standard incandescent lightbulbs with energy-efficient compact fluorescent lightbulbs can save a lot of energy. Calcul

Fantom [35]

The difference between the wattage is 60-18=42W. The saving in energy over 10 hrs is 10×42=420 watt-hours=0.42kWh

8 0

2 years ago

Some oxides are given below. (i)Na2O (ii)NO2 (iii) CO2 (iv) MgO a) Which are the basic oxides among these? b) What is the name o

umka2103 [35]

<h3>Further explanation</h3>

Basic oxides ⇒ metal(usually alkali/alkaline earth) +O₂

L + O₂ ⇒ L₂O

L + O₂ ⇒ LO

Dissolve in water becomes = basic solution

L₂O+H₂O⇒ 2LOH

LO + H₂O⇒ L(OH)₂

So the basic oxides : Na₂O and MgO

Na₂O + H₂O⇒NaOH

MgO +H₂O⇒Mg(OH)₂

The aqueous solution of CO₂(dissolve in water)

CO₂ + +H₂O⇒ H₂CO₃(carbonic acid)

5 0

2 years ago

Which of the following is true of atoms with very low electronegativity

Katarina [22]

Answer:

well there is no chose here is my best option i would chose

1 Electronegativity is the ability of an atom to attract electrons.

Explanation:

5 0

2 years ago

How can you locate a family of elements in the table? Name all the elements in the oxygen family.

ANEK [815]

<span>every column on the table represents a family that react similarly with other <span>elements.</span></span>

4 0

2 years ago

A solution of the primary standard potassium hydrogen phthalate (KHP), KHC8H4O4 , was prepared by dissolving 0.4877 g of KHP in

Grace [21]

Answer:

The concentration of KOH is 0.06137 M

Explanation:

Step 1: Data given

Molar mass of KHP = 204.22 g/mol

Mass of KHP = 0.4877 grams

Volume of water = 50 mL

Volume of KOH solution = 38.91 mL

Step 2: The balanced equation

C8H5KO4 + KOH ⇒ C8H4K2O4+ H2O

Step 3: Calculate number of moles of KHP

Moles = Mass / molar mass

Moles KHP = 0.4877 grams / 204.22 g/mol

Moles KHP = 0.002388 moles

Step 4: Calculate moles of KOH

For 1 mol KHP we need 1 mol KOH to produce 1 mol C8H4K2O4 and 1 mol H2O

For 0.002388 moles KHP we need 0.002388 moles KOH

Step 5: Calculate the concentration of KOH

Concentration = moles / volume

Concentration of KOH = 0.002388 moles / 0.03891 L

Concentration of KOH = 0.06137 M

The concentration of KOH is 0.06137 M

4 0

2 years ago