CHEMISTRY HIGH SCHOOL

Lawrence is testing how quickly water with baking soda freezes. He adds water with baking soda to one ice tray and plain water to another ice tray. He places each tray in the freezer and records the time when each one starts to freeze. What is the treatment in this experiment?A) Water
B) Baking soda
C) Freezer
D) Ice tray

Answers

Answer 1
Answer: B) Baking soda
The control sample is regular water while the other sample has been treated with baking soda.
Answer 2
Answer:

Answer:

B

Explanation:

Baking soda is what is being tested

ps. i ust took the test

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What action could slow a chemical reaction rate?a. lowering the pressure
b. raising the temperature
c. increasing the concentration
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Answers

The action that could slow a chemical reaction rate is adding more of a substance to a mixture. The answer is letter d. It does not give time for the rest of the reactants to be consumed because you are adding more of it causing to slow the reaction.

Mendeleev is the scientist who first developed the atomic model

the atomic theory

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Answers

Dmitri Mendeleev is the scientist who first developed the periodic table.

He is a Russian chemist and inventor who formulated the periodic law and created the periodic table of elements. He corrected some of the properties of the elements. Now, we can easily locate the elements we wanted to identify. With the help of Mendeleev, studying chemistry is not that difficult because he tried to simplify some of the concept that was complex before.

The figure shows a nutrition label. How much energy does this food contain?

Answers

Answer:

i need help with that too.

Explanation:

A balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm, what is the new volume of the balloon in the hot room?

Answers

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Charles' gas law is used here. Therefore the new volume of the balloon in the hot room is  3.68 L.

What is ideal gas equation?

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Vanderwaal gas can behave as ideal gas low pressure and high temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of gas

V= volume of gas

n =number of moles of gas

T =temperature of gas

R = Gas constant = 0.0821 L.atm/K.mol

Combining Boyle's and Charles' gas law

V₁/T₁ = V₂/T₂

3.50 L ÷298 K = V₂÷313 K

V₂ =  3.68 L

Therefore the new volume of the balloon in the hot room is 3.68 L.

To learn more about ideal gas equation, here:

brainly.com/question/14826347

#SPJ6

yes, according to charles law, this would be equal to 3.68 L

How do the products and reactants of a chemical change compare? The mass of the products is greater than the mass of the reactants because energy is absorbed by the reaction.

The mass of the products equals the mass of the reactants because energy is not absorbed or given off by the reaction.

The mass of the products is less than the mass of the reactants because energy is given off by the reaction.

The mass of the products equals the mass of the reactants because the same atoms are present throughout the reaction

Answers

The right answer for the question that is being asked and shown above is that: "The mass of the products equals the mass of the reactants because the same atoms are present throughout the reaction." -- The products and reactants of a chemical change should be compared

Need help on this
Question

Answers

Answer:

The answer is D
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