30. 240.0 mL of water is added to 2.45 L of 3.00 M salt water. What is the new molarity?

Question 5 of 5 A scientist uses electricity to break down water into hydrogen gas and oxygen gas. Which statement best explains what happens? A. A physical change occurs. B. A base neutralizes an acid. C. An acid neutralizes a base. D. A chemical change occurs.

Question 3 of 5 How does heating cause bread to burn? A. By making substances in the bread go through chemical changes B. By making the bread go through a physical change C. By making the bread go through a change of state D. By making the liquid substances in the bread crystallize

Name the following polyatomic compound. The ending will be "ate'or "ite". CaSO_(4) square do

underline (2)H_(2)(g)+O_(2)(g)arrow underline (2)H_(2)O(g) How many liters of water can be made from 5 L of oxygen gas and excess hydrogen gas at STP?

3. The molar mass of a compound is defined as: A. the mass in grams of one mole of that compound. B. the weighed mass in grams divided by Avogadro's number. C. the weighed mass in grams times Avogadro's number. D. the percent composition of a compound.

How many total atoms are there? underline ( )4H_(2)Ounderline ( )3Be_(2)Brunderline ( )5CO_(2) underline ( )8NaClunderline ( )2O_(2)underline ( )MgS

How do subtle shifts in molecular structure shape their behavior and interactions?

Which one of the following best describes Charles's Law? Answer: The volume of a gas is directly A proportional to the temperature of the gas. The pressure of a gas is directly B proportional to the temperature of the gas. C proportional to the moles of a gas. The volume of a gas is directly D proportional to the volume of a gas. The pressure of a gas is inversely

11.44 Use half-reaction method to balance the following Red-ox reaction. Pay attention to the media. You need supply two balanced half reactions and one balanced overall reaction. (a) AsH_(3)(g)+ClO_(3)^-(aq)arrow H_(3)AsO_(4)(aq)+Cl^-(aq) acidic media (b) S_(2)O_(3)^2-(aq)+Cl_(2)(g)arrow HSO_(4)^-(aq)+Cl^-(aq) acidic media )[Pb(OH)_(4)]^2-(aq)+ClO^-(aq)arrow PbO_(2)(s)+Cl^-(aq) basic media (d) MnO_(2)(s)+Cr^3+(aq)arrow Mn^2+(aq)+CrO_(4)^2-(aq) basic media g)MnO_(4)^-(aq)+SO_(3)^2-(aq)arrow MnO_(2)(s)+SO_(4)^2-(aq) neutral media

Hot Questions

Before you go, which type of molecule would you choose to be the anode in a lithium battery? a) The metal with the most negative potential b) It does not matter since lithium's potential is so negative c) The metal with the most positive potential d) Another lithium compound

Part I: Unit Conversions.Show all work (known and unknown, and dimensional analysis - including units! Write your answers in the boxes provided. Unit Test: Dimensional Analysis and Mole Convers 1. Find the number of minutes in 25 years, assuming that $1year=365days$ K:25 years 2. The driving distance from Spokane to Seattle is 479,000 meters. Convert this distance to miles given $1m=100cm,1in=2.54cm,12in=1ft,$ and $1mi=5280ft$ $\square $ Part II: Mole Conversions . Show all work (known and unknown, and dimensional analysis - including units! Write your answers in the boxes provided. 3. A sample contains $9.2\times 10^{22}$ atoms of beryllium (Be)How many moles is this? $\square $ 4. The formula for Aluminum Carbonate is $Al_{2}(CO_{3})_{3}$ What is the molar mass of aluminum carbonate? $\square $

The following reaction is an example of a substitution reaction. $2Na+Cl_{2}\rightarrow 2NaCl$ TRUE FALSE

Heterogeneous mixtures are observed to be uniform throughout. True False

What are some examples of foods that need an emulsifier mayonnaise chocolate ice-cream oil water various salad dressings.

27. The contents of a drum have not been identified. You notice crystalline material on top of the drum, you should treat the contents as: A. shock-sensitive waste. B. nearly empty. C. containing chlorinated solvent. D. containing caustic materials.

A weak acid is a dilute acid that is not very powerful. True False

What is a crucial aspect of chemical optimization? Adjusting team member speed Pre-treating the vehicle Using water reclamation tanks Ordering new equipment

Why is chemistry sometimes referred to as the "central science?" Because we need to know it to survive as a species. Because it is interconnected with many other STEM disciplines. Because it incorporates principles from math and physics. Because there are many subdisciplines of science that rely on chemistry.

Malia was able to make a paperclip float on the surface of water. What will most likely happen to the paperclip if a drop o dishwashing detergent is added near it? Soap is a surfactant that increases the intermolecular forces of water allowing the paperclip to continue to float. Soap makes the water less viscous making the paperclip sink. Soap is a surfactant that disrupts the intermolecular forces of water making the paperclip sink. Soap makes the water more viscous allowing the paperclip to continue to float.