A dryer uses 4200 W and operates for 2.50 hours in one day, how much energy is used?

Explanation:

heat and pressure are two main forces that transform organic matter into fossil fuels

Answer:

C Fluorine

Explanation:

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, the element X with the atomic number of 18 is Argon (Ar) while the next element (element Y) in the periodic table, with atomic number 19, is potassium (K).

Element X is found in the group zero (also called group 18 and elements found therewith are referred to as noble gases) of the periodic table while element Y is found in group 1 (elements found here are referred to as alkali metals).

Element X has a completely filled outermost shell while element Y has one electron in its outermost shell.

Element X is a metal while element Y is a nonmetal.

Answer: The correct options are A and E

Explanation:

A chemical reaction is defined as the reaction in which two or more chemical substances react to form two or more different chemical substances.

A new substance (product) is formed in a chemical reaction when the bonds between the reactants are broken so that the new bonds between the products can be formed.

For a given chemical reaction:

[tex]HF+NaOH\rightarrow NaF+H_2O[/tex]

Here,

HF is a covalent compound as sharing of electrons take place between hydrogen and fluorine atom

NaOH is an ionic compound as a complete transfer of electrons occurs from sodium to hydroxide.

Thus, to form the products, an ionic bond between sodium and hydroxide must be broken coupled with a covalent bond between hydrogen and fluorine.

Hence, the correct options are A and E

Based on the molarity of the solutions;

pH is the negative logarithm to base ten of the hydrogen ions concentration of a solution.

pOH is the negative logarithm to base ten of the hydroxide ions concentration.

Also;

For HCl:

pH = -log [H3O+]

pH =-log (0.200)

pH = 0.699

Then;

poH= 14-0.699

pOH = 13.301

For NaOH:

pOH= -log [OH-]

= -log (0.0143)

pOH = 1.845

Then;

pH= 14-poH

= 14- 1.845

pH = 12.16

For HNO3:

pH= -log[H3O+]

=-log(3.0)

= -0.4771

Then;

pOH = 14-9-0.4771

pOH = 14.4771

For [Ca(OH)2]

molarity = 0.0031M

2 moles of OH- are produced

[OH-]= 2 × 0.0031

[OH-] = 0.0062M

pOH = - log[OH-]

=-log(0.0062)

=-log(6.2x10-3)

=-(-2.21)

pOH = 2.21

Then;

pH =14-2.21

pH =11.79

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Answer:  Most of the hormones released by endocrine system are regulated by negative feedback mechanism.

- Negative feedback mechanism functions to reduce the intensity of original stimulus in order to maintain homeostasis.

Explanation:

When blood calcium levels are decreased, parathyroid gland releases parathyroid hormone (PTH).

PTH acts on bone and stimulate bone resorption by promoting osteoclastic activity. It stimulates reabsorption of calcium in kidneys. PTH promotes calcitriol synthesis that acts on small intestine to increase calcium absorption.

Action of PTH increases blood calcium levels.

When blood calcium levels are increased, thyroid gland releases hormone calcitonin.

Calcitonin opposes PTH and acts to deposit calcium in the bone.

Calcitonin acts on osteoblasts and promote increase in bone mass.

Action of calcitonin decreases blood calcium levels.

Answer:

Nitrogen has 5 valence electrons

Explanation:

nitrogen has it's attoms form triple bonds which are very hard to break

so non-reactive

Answer:

ma herdina thesto wrestling

The statement which is an example of nuclear fission is that a large radioactive atom breaks into smaller atoms, producing nuclear energy.

Nuclear fission is a kind of radioactive decay reaction in which an unstable nuclei of an atom will split into smaller stable nuclei by the emission of lots of energy.

Hence in nuclear fission a large radioactive atom breaks into smaller atoms, producing nuclear energy.

To know more about nuclear fission, visit the below link:
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Answer:

Sb

Explanation:

Sb (antimony) is an metalloid

Answer:

answer: B or D

Explanation:

hope it helps thanks❤

Answer:

28 years

Explanation:

the information is literally in the question.

Answer:

C. All of the above

Explanation:

They all happen beyond critical point.

Number of subatomic particles=35+36+35=106

Explanation:

Atomic number=35

Mass number=71

No. of proton p=35

No. of neutron n=71−35=36

No. of electron e=35

Answer:

(BH3 follows the octet rule by dimerizing, as Hadi Kurniawan AR pointed out.) For H and He, an "octet" = 2 electrons. Boron does prefer to follow the octet rule, in that it likes to form borate compounds such as NaBH4. It also is happy to form compounds with elements with lone pairs.

Answer:

As organisms release energy during cellular respiration, carbon dioxide is produced from the carbon in energy storage molecules. ... Carbon dioxide in the biodome decreased because decomposers decreased which means there was a decrease in cellular respiration overall.

btw :

stay safe! :3

When liquid 5.0 molar NiCl₂ is added to 0.3 M of NiCl₂ solution :  

  Molarity will increase  ( A )

What is Molarity ?

Molarity is the measure of the number of moles of solute present per volume of the solution. The addition of 5.0 molar nickel chloride into a 0.3M Nickel chloride solution will lead to an increase in the number of moles of Nickel chloride present in the solution.

Molarity is directly proportional to moles of solute in a solution therefore the molarity of the solution will increase.

Hence we can conclude that When liquid 5.0 molar NiCl₂ is added to 0.3 M of NiCl₂ solution :   Molarity will increase.

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Answer: D

Explanation:

32.7 g Zn

Explanation:

First convert the amount of gas into moles:

11.2 L H2 × (1 mol H2/22.4 L H2) = 0.500 mol H2

Then use the molar ratio to find the amount of zinc necessary to produce the amount of gas above:

0.500 mol H2 × (1 mol Zn/1 mol H2)

= 0.500 mol Zn

Now use the molar mass of zinc to find the number of grams of zinc for the reaction to occur:

0.500 mol Zn × (65.38 g Zn/1 mol Zn)

= 32.7 g Zn

Answer:

H2SO4 + Mg(OH)2 → H2O + MgSO4

Explanation:

when magnesium hydroxide reacts with sulfuric acid you get magnesium sulfate

hope this helps

Answer:

noo

Explanation:

its basic

....................

Answer: acidic

Explanation:

Answer:

Red: 17.24%

Yellow: 32.76%

Green: 50%

Explanation:

Question : Which issue surrounding nuclear power creates the biggest concern?

Answer : How to deal with the radioactive waste (B)

The following issues surrounding nuclear power that create the biggest concern is What nuclear power should be used for?

Nuclear powers are those powers that are produced by nuclear reactions. These reactions include nuclear fission, nuclear fusion, and nuclear decay. Nuclear power is currently in use to produce electricity. The reaction uses uranium and plutonium reaction to produce electricity.

Nuclear power is used for generating electricity, and it is necessary to use the correct radioisotopes to produce electricity.

Thus, the correct option is D. What nuclear power should be used for?

Learn more about nuclear power, here:

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REACTION TYPE:

Single displacement/Oxidation-reduction

(Hope this helped UwU)

Answer:

Synthesis reaction is the answer