please help I only have 5 hours left​

Answer:

False

Explanation:

It is the opposite. A good way to remember is the that the dependent variable depends on the independent variable.

Answer:

[2]HBr + [ ] Ba(OH)2 ➖ [ ] BaBr2 + [2] H20

Hope it will help :)

Answer:

Explanation:

That in the liquid, the sugar is completely dissolved. Lemon juice, water, and sugar are combined together and form a solution. A solution is a mixture in which the various types of matter are evenly spread out. Water is considered the solvent of lemonade.

Answer: It most likely represents a canyon.

Answer:

Well ice cubes are normally liquids but it is frozen water making it a solid. Since they are made of water particles, they wouldn't normally be a solid, but the particles are packed close enough together to make it one. Hope this helps! :D

Explanation:

Answer:

change the concentration of one reactant while keeping the other concentrations constant

Explanation:

For a given reaction;

A +  B --> C + D

The reaction rate may be given as;

Rate = k[A][B]

In the above rate equation, the orders of both reactants ( A and B) is 1 . Reaction order is basically how the concentration of the reactant affect the rate of the equation.

The correct option is;

change the concentration of one reactant while keeping the other concentrations constant.

That way, one can monitor how a particular reactant affect the rate of the reaction.

Answer:

D. Condensation

Explanation:

Answer:

what do you mean?

Explanation:

Answer:

They represent the valence electrons, so s and p sublevels only! This does not include the d block!

Answer:

219.73 g

Explanation:

The molecular formula of zinc (II) oxide is ZnO. This means its molar mass would be:

With that molar mass, we can convert moles into grams:

Answer: [tex]1s^22s^22p^63s^23p^64s^2[/tex] , oxidation state = +2

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom. The electrons are filled according to Afbau's rule in order of increasing energies.

The electronic configuartion of Calcium with atomic number 20  is :

[tex]Ca:20:1s^22s^22p^63s^23p^64s^2[/tex]

As calcium can easily lose its two valence electrons to attain stability , its oxidation state is +2.

[tex]Ca^{2+}:18:1s^22s^22p^63s^23p^6[/tex]

Answer:

1) alr balanced

2) 2 2 1

3) 2 1 1 2

4) 2 3 2

5) 2 1 2 1

6) 1 6 2 3

7) 2 2 1

8) 1 2 1 2

9) 2 5 4 6

10) 3 1 2

Answer:

1. accurate but not precise

2. precise but not accurate

3. accurate and precise

4. neither

Explanation:

hope this helps :)

The accuracy is always followed by precision, but a high degree of precision does not imply accuracy. All the accurate results will be definitely precise.

The accuracy of a determination is defined as the concordance between the result and the true value or most probable value. The precision of a determination is known as the concordance of a series of measurements of the same quantity.

The accuracy expresses the correctness of a measurement while precision of a set of results expresses the reproducibility of a measurement.

Accuracy is related to how close the observed result is to the true value while precision is related to how close the measurements are to each other.

The given measurements are denoted as:

1. Accurate but not precise

2. Precise but not accurate

3. Accurate and precise

4. Neither

Thus accurate results will be precise but precise results may not be accurate.

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The potential energy of a bird : 196 J

Given

mass of bird = m = 2 kg

height = h = 10 m

Required

The potential energy

Solution

Potential energy is the energy that objects have because of their position. Usually related to the earth's gravitational force

Can be formulated

PE = m g h

g = acceleration due to gravity ⇒ 9.8 m/s²

Input the value :

PE = 2 kg x 9.8 m/s² x 10 m

PE = 196 J

Answer:online research

Explanation:

Unbalanced forces cause a change in motion, speed, and/or direction. When two forces act in the same direction on an object, the net force is equal to the sum of the two forces.

Answer:

B.Unbalanced .............

Answer:

[tex]\boxed {\boxed {\sf 0.6692 \ mol \ AlCl_3}}[/tex]

Explanation:

To convert from grams to moles, we must use the molar mass. This can be calculated using the Periodic Table.

1. Molar Mass

First, identify the elements in the compound AlCl₃. They are aluminum and chlorine. Now find the masses:

Take a look at the compound. There is a subscript of 3 after chlorine, so we must multiply its molar mass by 3 then add aluminum's.

2. Convert Grams to Moles

We can use the molar mass as a ratio.

[tex]\frac{133.331538 \ g \ AlCl_3}{1 \ mol \ AlCl_3}[/tex]

Multiply by the given number of grams: 89.23

[tex]89.23 \ g \ AlCl_3 * \frac{133.331538 \ g \ AlCl_3}{1 \ mol \ AlCl_3}[/tex]

Flip the fraction so the grams of aluminum chloride cancel out.

[tex]89.23 \ g \ AlCl_3 * \frac{1 \ mol \ AlCl_3}{133.331538 \ g \ AlCl_3} = 89.23 \ * \frac{1 \ mol \ AlCl_3}{133.331538}[/tex]

[tex]\frac{89.23 \ mol \ AlCl_3}{133.331538}[/tex]

[tex]0.6692340112 \ mol \ AlCl_3[/tex]

3. Round

The original measurement of grams has 4 significant figures. We must round to 4 sig figs.

For the number we calculated, that is the ten thousandth place.

The 3 in the hundred thousandth place tells us to leave the 2.

[tex]0.6692 \ mol \ AlCl_3[/tex]

There are about 0.6692 moles of aluminum chloride in 89.23 grams.

Answer:

Y because organism y feed on herbivores

Explanation:it means y is carnivores or omnivores

Explanation:

Answer:

The chain of colored boxes represent the first eight amino acids in the beta chain of hemoglobin. The sixth position in the normal beta chain has glutamic acid, while sickle beta chain has valine. This is the sole difference between the two

Explanation:

Answer:

controls stem height in peas, for example, has one allele for tall stems and one allele for short stems. Each pea plant inherits a combination of two alleles from its parents either two alleles for tall stems, two alleles for short stems, or one of each. Individual alleles control the inheritance of traits

Explanation:

Answer:

thermal

Explanation:

Thermal energy is due to the motion of an object's particles, due to the random movement of molecules in a system, thermal energy also known as random or internal kinetic energy is produced, hence option A is correct.

Atoms or molecules in motion are the source of thermal energy. An object's thermal energy rises as its temperature rises because the movement of its molecules or atoms accelerates. It is possible to transmit an object's thermal energy to another.

Thermal energy, also known as random or internal kinetic energy, is created when molecules in a system move randomly, as a result of the motion of an object's particles.

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Answer:

The answer is choice (4)

Explanation:

Laker in 5 !!!

The substance with the greatest molecular mass is I₂.

The molecular mass is the sum of the atomic masses of all atoms in a molecule

Let's calculate the molecular mass of each compound to know the greatest.

molecular mass of H₂O₂ = 2 + 32 = 34 g/mol

molecular mass of CF₄ = 12 + (19 × 4) = 12 + 76 = 88 g/mol

molecular mass of NO = 14 + 16  = 30 g / mol

molecular mass of I₂ = 127 × 2 = 254 g/mol

Therefore, the substance with the greatest molecular mass is I₂.

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Answer:

the answer would be ;B compare the volumes of the three cylinders

Answer:

Metals

Explanation:

All these are metals

Answer:

B: It is metals.

Explanation:

Look at your periodic table to locate iron, gold, and tin.

Iron is Fe

Gold is Au

Tin is Sn

They are all located in the transition metals area.

So the chemicals are metals.

Hope it helped!

Answer:

brain

Explanation:

The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.

Answer:

OC brain, due to the brain being basically the smarts of your body, combined with it also managing, important functions of the body

Explanation: