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2 years ago

Which of the following best describes seawater?

2 answers:

4 0

The correct answer to this question is B. The best description for seawater would be a homogeneous mixture. A homogeneous mixture is one in which the composition remains the same, so you cannot tell the difference between different parts of it. If the question is making a reference to pure seawater, as in the mixture between water and salt, then the answer is A.

gogolik [260]2 years ago

3 0

Answer:

Homogeneous Mixture

Explanation:

No real explanation. I just took the test and got this question correct! :)

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Naomi is investigating the properties of a solid material. It takes 120 joules to raise the temperature of 10 grams of the mater

MrRissso [65]

When heat energy is supplied to a material it can raise the temperature of mass of the material.
Specific heat is the amount of energy required by 1 g of material to raise the temperature by 1 °C.
equation is
H = mcΔt
H - heat energy
m - mass of material
c - specific heat of the material
Δt - change in temperature
substituting the values in the equation
120 J = 10 g x c x 5 °C
c = 2.4 Jg⁻¹°C⁻¹

3 0

2 years ago

Draw all of the constitutional isomers of the molecule with formula C3H5Br. Ignore geometric and stereoisomers.

Kay [80]

Answer:

-) 3-bromoprop-1-ene

-) 2-bromoprop-1-ene

-) 1-bromoprop-1-ene

-) bromocyclopropane

Explanation:

In this question, we can start with the I.D.H (hydrogen deficiency index):

$I.D.H~=~\frac{(2C)+2+(N)-(H)-(X)}{2}$

In the formula we have 3 carbons, 5 hydrogens, and 1 Br, so:

$I.D.H~=~\frac{(2*3)+2+(0)-(5)-(1)}{2}~=~1$

We have an I.D.H value of one. This indicates that we can have a cyclic structure or a double bond.

We can start with a linear structure with 3 carbon with a double bond in the first carbon and the Br atom also in the first carbon (1-bromoprop-1-ene). In the second structure, we can move the Br atom to the second carbon (2-bromoprop-1-ene), in the third structure we can move the Br to carbon 3 (3-bromoprop-1-ene). Finally, we can have a cyclic structure with a Br atom (bromocyclopropane).

See figure 1

I hope it helps!

7 0

2 years ago

Which statement describes a chemical reaction?

ELEN [110]

The statement that describes a chemical reaction is the statement c. reactants form products when atoms are rearranged. The atoms of the reactants are arranged is a specific position and number forming a determined compound. In a chemical reaction, the products are different compounds than the reactants, so the atoms have to rearrange to form these new compounds (the products).

4 0

2 years ago

Read 2 more answers

A gas is initially at a pressure of 0.43 atm, and a volume of 11.7 liters. Then the pressure is raised to 3.61 atm and the volum

lukranit [14]

Answer:

D. 91.98K

Explanation:

The General Gas Law equation is given by,

$\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}$

From the question,

the initial pressure,

$P_1 = 0.43 \: atm$

the initial volume,

$V_1 = 11.7 \: litres$

the final temperature,

$T_2=627K$

the final pressure,

$P_2=3.61atm$

the final volume,

$V_2=9.5litres$

Making

$T_1$

the subject of the expression, we obtain

$T_1= \frac{P_1V_1T_2}{P_2V_2}$

By substitution,

$T_1= \frac{0.43 \times11.7 \times627}{3.61 \times9.5}$

$T_1=91.980K$

Hence the initial temperature was 91.98 K

4 0

2 years ago

Read 2 more answers

**PLATO QUESTION, PLEASE ANSWER CORRECTLY, THANK YOU**

Nata [24]

The answers are the following that can be answered using the chart:

A. Which type of hurricane is expected to strike more frequently this century?
Category 4 + 5C. In general, will hurricanes likely become stronger or weaker this century?
Stronger, because there are more stronger ones thant he weaker ones that can result to hurricane.

E. Which types of hurricanes are expected to drop in frequency by more than 25% this century?
Categories 1, 2, 3

4 0

2 years ago