The percentage of nitrogen in urea (NH 2CONH 2 ​ ), is:​

The final temperature of the sample, in degrees Celsius is 36.6 °C

From the question, we are to determine the final temperature of the sample

From the formula for heat capacity, we have that

Q = mcΔT

Where Q is the heat energy

m is the mass

c is the specific heat capacity of the subtance

ΔT is the change in temperature ([tex]\Delta T= T_{f} -T_{i}[/tex])

From the given information

m = 687.6 g

Q = 8284.4 J

[tex]T_{i}[/tex] = 23.1 °C

Putting the parameters into the equation, we get

[tex]8284.4 = 687.6 \times 0.89 \times (T_{f} -23.1)[/tex]

NOTE: Specific heat capacity of aluminum = 0.89 J/ g °C

Then,

[tex]8284.4 = 611.964 \times (T_{f} -23.1)[/tex]

[tex](T_{f} -23.1)= \frac{8284.4}{611.964}[/tex]

[tex](T_{f} -23.1)= 13.5[/tex]

[tex]T_{f} = 13.5 + 23.1[/tex]

[tex]T_{f} = 36.6 \ ^\circ C[/tex]

Hence, the final temperature of the sample, in degrees Celsius is 36.6 °C

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Answer:

An -ite or -ate ending means a polyatomic ion that includes oxygen is in the formula.

ate = one more O than -ite

Explanation:

Example:

NO2 is nitrite

NO3 is nitrate

You can see that the molecules are made of the same elements, however they have more or less of one of the elements (i.e. oxygen).

These suffices are used in oxygen compounds

Take example of Sulphur

ite means 2 and ate means 3

Based on this information, the gland that helped Elisa to lift the branch is the adrenal gland.

They are two small organs responsible for secreting hormones such as cortisol, adrenaline or noradrenaline into the bloodstream.

These hormones have to do with how the body responds to stress to help the body get a boost of energy to better handle an emergency situation, and some are vital for survival.

Therefore, we can conclude that based on this information, the gland that helped Elisa to lift the branch is the adrenal gland.

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Answer:

D- Adrenal

Explanation:

The two properties which provide the greatest resistance to the flow of a current are the long and thin wires.

Resistance is the quantity which define the flow of current from any wire and it is represented as:

R ∝ l/A, where

l = length of wire

A = cross section of wire

From the relation it is clear that resistance is high in long wire and thin wire.

So, required properties are long and thin.

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Answer:

B.

Explanation:

the answer is the second option.

Answer:

About 326 K.

Explanation:

Recall the ideal gas law:
[tex]\displaystyle PV = nRT[/tex]

Where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature.

Because we want to solve for temperature T:

[tex]\displaystyle T = \frac{PV}{nR}[/tex]

Substitute and evaluate. R has a value of 0.08206 L-atm/mol-K:
[tex]\displaystyle \begin{aligned} T & = \frac{(2.25\text{ atm})(25.0\text{ L})}{(2.10\text{ mol})\left(\dfrac{0.08206\text{ L - atm}}{\text{mol - K}}\right)} \\ \\ & = 326\text{ K}\end{aligned}[/tex]

In conclusion, the temperature of the gas will be about 326 K.

Answer:

6.336 mg

Explanation:

.4055 x (1/2)^6 = .006336 gm

Answer:

I would say C

Explanation:

Answer:

Homeostasis, as currently defined, is a self-regulating process by which biological systems maintain stability while adjusting to changing external conditions.

Explanation:

Answer:

And that means fish must be able to survive down here. This is due to a special property of water: the elasticity of H2O. We know that when the temperature sinks below freezing, water first contracts and then expands as it begins to turn to ice. Ice, being lighter than water, floats.

Explanation:

The property of water that allows fish to survive in a lake that is frozen over is the fact that ice is less dense than liquid water.

Answer:

Simple distillation is the method used to separate substances in mixtures with significantly different boiling points, while fractional distillation is used for mixtures containing chemicals with boiling points close to each other.

Answer:

Hurricane will stay hurricane.

Explanation:

(B) Water provides energy

(A) it will die if it's on land

There are four kinds of elements i.e carbon, hydrogen, nitrogen, and chlorine. The compound name is allylamine Hydrochloride.

An allyl group is a substituent with the structural formula

[tex]H_2C=CH - CH_2R[/tex], where R is the rest of the molecule.

There are four kinds of elements i.e carbon, hydrogen, nitrogen, and chlorine. The compound name is allylamine Hydrochloride.

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Answer:

B

Explanation:

the Answer is B .

The skeletal system produce blood cells , protect organs and helps the movement of the body .

1.0 mol HCl will require 1.0 mol NaOH, 0.75 mol KOH will require 0.75 mol [tex]HNO_3[/tex],  0.20 mol HF will require 0.1 mole [tex]Ba(OH)_2[/tex], and 0.90 mol [tex]Mg(OH)_2[/tex] will require 0.90 mole [tex]H_2SO_4[/tex]

It is the ratio of the chemical components in chemical reactions.

The equation for each of the listed reactions is as follows:

The mole ratio of NaOH and HCl is 1:1, that of  [tex]HNO_3[/tex] and KOH is also 1:1, that of  [tex]Ba(OH)_2[/tex] and HF is 1:2, and that of [tex]H_2SO_4[/tex] and [tex]Mg(OH)_2[/tex] is 1:1.

Thus, 1.0 mol HCl will require 1.0 mol NaOH, 0.75 mol KOH will require 0.75 mol [tex]HNO_3[/tex],  0.20 mol HF will require 0.1 mole [tex]Ba(OH)_2[/tex], and 0.90 mol [tex]Mg(OH)_2[/tex] will require 0.90 mole [tex]H_2SO_4[/tex]

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₹1

The general rule is C_n H_2n-2

It's Butyne and contains tripple bond

Option A

#2

It has strong electronegativity

Answer:

Explanation:

Animal waste is broken down, producing methane gas

The equation which balances the given chemical reaction between magnesium and oxygen is 2Mg + O₂ → 2MgO.

Balanced equations are those in which all of the entities on both the reactant and product sides are equal.

Given chemical reaction:

Mg + O₂ → MgO

Above reaction is not balanced as number of oxygens are not equal on both sides.

Because the amount of magnesium atoms is not equal, this is not a balanced equation.

Because the amount of oxygen atoms is not equal, this is not a balanced equation.

This is a balanced equation as number of each atoms are equal on both sides.

Because the amount of magnesium atoms is not equal, this is not a balanced equation.

Hence balanced equation is 2Mg + O₂ → 2MgO.

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Answer: Q1: Wet meadows, & Marshes

              Q2: True

              Q3: Habitats

              Q4: Water cycle

              Q5: True

Hope this helps & have a blessed day. :)

Given what we know, we can confirm that one possible solution to the problem of flammable methane from concentrating in landfills is to use biosolids.

Biosolids are organic matter that are created by recycling waste. These biosolids can act as a cover over landfills. The bacteria present in these solids then use this methane gas to create carbon dioxide gas. Though not ideal, this product is much less harmful to the environment than methane.

Therefore, we can confirm that one possible solution to the problem of flammable methane from concentrating in landfills is to use biosolids.

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Answer:

the answer is 6 atoms

Answer:

Gestalt pioneers contribute rich examples of creative thinking and practice in their writings and in their work

Explanation:

Answer:

phosphorous acid

Explanation:

PO4 (phsophate) is a polyatomic, so when the subscript changes, so does the name and it becomes phosphite (one less oxygen atom)

if the name of the polyatomic ends in ite, the ending of the acid name becomes ous making it phosphorous acid.

You don't need to worry about the hydrogen in the naming process because it is an oxyacid, where you only really worry about the polyatomic (acid tells you there is hydrogen)

Answer:

I believe your answer would be, "A" A particle with two or more atoms bonded covalently.

Explanation:

The definition of a molecule;

A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

Answer:

3

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