shahilparwez875

Which is not part of the recipe for a thunderstorm to form?

A. Moisture in the  law atmosphere

B. A cold front advancing 

C. A lifting force

D. Unstable air

0.750 mol of NaCl is dissolved into 150.0 grams of pure water. What is the mole fraction of NaCl?

For which among the following is not a true fruit?   

A.  Apple 
B.  Date 
C.  Grape
D.  Plum

At an average speed of 8 m/s, how many kilometers can a cyclist travel in a 6 hour day?
 ______ km

Convert 240 K and 468 K to the Celsius scale.

Question 1  Name the compound AlBr3

Question 1 options:

aluminum tribromide

tri aluminum bromide

aluminum bromine

aluminum bromide

Question 2 (2 points) Name this compound: KI

Question 2 options:

iodine potasside

potassium iodide

potassium iodine

potassium iodite

Question 3 (2 points) What is the name of Ag2S?

Question 3 options:

silver sulfide

silver sulfate

silver (II) sulfide

silver (I) sulfide

Question 4 (2 points) Name this compound:  NaBr

Question 4 options:

Bromide sodide

Sodium bromite

Sodium bromate

Sodium bromide

Question 5 (2 points) Ionic compounds are bonds between

Question 5 options:

Metals and Metals

Metals and Nonmetals

Nonmetals and Nonmetals

None of the above

Question 6 (2 points) What is the formula for magnesium phosphide?

Question 6 options:

Mg3P2

Mg2P3

Mg3(PO3)2

Mg2PO3

Question 7 (2 points) Name the following ionic compound: BeCl2

Question 7 options:

beryllium chlorine

beryllium dichloride

beryllium II chloride

beryllium chloride

Question 8 (2 points) Which of these compounds is ionic? 

Question 8 options:

Carbon dioxide

Silicon tetrachloride

Lithium bromide

Dinitrogen Trioxide

Question 9 (2 points) Write the name for the following compound: (NH4)3PO4

Question 9 options:

triammonium phosphite

ammonium phosphate

ammonium phosphite

ammonium phosphide

Question 10 (2 points) What is the name of N2O3

Question 10 options:

Dinitrogen oxide

Nitrogen trioxide

Dinitrogen trioxide

Nitrogen oxide

Question 11 (2 points) What is the chemical formula for Nitrogen triiodide?

Question 11 options:

NI

N3I

None of these

NI3

Question 12 (2 points) Name the following compound: NaNO3

Question 12 options:

Sodium Nitrogen Oxide

Sodium nitrate

Sodium nitrite

Sodium nitride

Question 13 (2 points) What is the name of Al(NO3)3?

Question 13 options:

Aluminum trinitrate

Aluminum (III) nitrate

Monoaluminum nitrate

Aluminum Nitrate

Question 14 (2 points) Name the following ionic compound: MgSO4

Question 14 options:

magnesium sulfate

magnesium sulfide

magnesium sulfoxide

magnesium sulfide

Question 15 (2 points) What is the name of Mg(OH)2?

Question 15 options:

Magnesium Hydride

Magnesium Dihydroxide

Magnesium Dihydride

Magnesium Hydroxide

What nervous system does the brain and spinal cord make up?

Neurons outside of the central nervous system are all part of the ____ nervous system?

The rapidly rising phase of the neural impulse is due to the _________.

What’s 1 times 2 and 2 / 1 plus 1/2 and 1

Plus 2

Can anybody please help me solve this

1. Explain a difference and a similarity between ionic and covalent bonding.

1. Prokaryotic cells (only one correct answer)

a) Are unicellular, have a nucleus

b) Are multicellular, have a nucleoid

c) Have no DNA - just RNA

d) Are bacteria, have a circular DNA 

2. A complex of a DNA molecule and histone octamer is called?

a) Nucleosome

b) Nucleoplasm

c) Chromatid

d) Euchromatin

Which countries in Asia are located on both continents?

What's the formula of water?

spead ormula

1. A group of proteins distributed along inner nuclear membrane form:

a) Nuclear pore

b) Nuclear lamina

c) Nucleosome

d) Nucleotides

2. Which nuclear structural element's function is a selective transport?

a) Nuclear lamina

b) Nuclear pore complex

c) Chromatin

d) Nucleolus

A 35.0 mL sample of 1.00 M KBr and 65.0 mL sample of 0.600 M KBr are mixed.
What is the molarity of the KBr in the final solution?

 How do astronomers know that dark matter exists? 

Calculate the rate constant k for the first order reaction, if the half-life time = 5.0 seconds.

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I know constant k is 0.693 value, but is this answer? Or is it a way to solve this question?

1. In human somatic cells the normal number of chromosomes will be (only one correct answer)

a) 23

b) 44

c) 24

d) 46

From Earth, the Milky Way galaxy appears as a band of stars in the night sky. Which answer best explains the reason for this?

1. What are the conditions for a body to execute simple harmonic motion?

Arrange the following in order of increasing ionic radius: Cl

, Na+

, and S2

Explain this order

Write the thermochemical equations for the following reactions.

Heat energy of 566.0 kJ is absorbed when 1 mol carbon dioxide decomposes to carbon monoxide and oxygen gas.

From the following enthalpy changes

Indicate whether each of the following reactions is endothermic or exothermic:

Write the thermochemical equations for the following reactions.

Combustion of 1 mol ethanol which yields carbon dioxide and water releasing 1366. 8 kilojoules of heat energy.

Calculate the ΔH0rxn for the reaction

Write the orbital electronic structure of the ground state of (a) the bismuth atom (Z = 83), and (b) the W6+ ion (Z = 74).