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  • Waiting for answer An ion ##"M"^(3+)## has 10 electrons and 14 neutrons what is...

    ##Z = 13## ##A = 27## Start by making sure that you know what you're looking for here. An element's , ##Z##, tells you how many protons that element contains in its nucleus. Eve...

  • Waiting for answer What is the difference between a quantitative and a qualitat...

    Quantitative data is numerical. (Quantities) This type of data results from measurements. Some examples of quantitative data would be: the mass of a cylinder of aluminum was 14.23g the length of the pencil was 9.18cm Qualitative data is non-numerical. (Qualities) Some examples of qualitative data...

  • Waiting for answer How do you factor ##2y^2+7y+6##?

    ##2y^2+7y+6## We can Split the Middle Term of this expression to factorise it In this technique, if we have to factorise an expression like ##ay^2 + by + c##, we need to think of two numbers such that: ##N_1*N_2 = a*c = 2.6 = 12## and ##N_1 +N_2 = b = 7## After trying out a few numbers we get ##N...

  • Waiting for answer What are the causes of land pollution?

    There are many causes of land pollution. There are many sources of land pollution . Agricultural activities are a major source of land pollution. We use chemicals such as fertilizer...

  • Waiting for answer Magnesium + hydroselenic acid ------>

    ##Mg+H_2 Se- MgSe+H_2## Since magnesium is bi-valent, and so is the selenium in the acid, they will be in a one-to-one ratio.

  • Waiting for answer Is milk souring a physical or chemical change?

    When milk turns sour for example in a warm room it is a chemical change. If it was a physical change you would be able to undo the souring of milk. Physical changes can be reversed,...

  • Waiting for answer The length of the Titanic was 882 feet. Porter's history cla...

    8.82 feet Let's set up the ratio. We know that the actual length of the ship was 882 feet and we want to know how long the model will be. We also have a ratio of 1 model length to ev...

  • Waiting for answer What is electrolytic decomposition?

    Very simple: ELECTROLYTIC DECOMPOSITION means breaking in ions when electricity is passed in a solution. Example: When we pass electricity in a solution of Na-Cl and water NaCl is broken in ions. Or of water is the decomposition of water into oxygen and hydrogen gas due to an electric current be...

  • Waiting for answer Calling the biosynthetic phase as dark reaction is a misnome...

    yes it is true. Biosynthetic phase is actually dependent on light for its funtion and hence calling it a dark reaction is definitely wrong.

  • Waiting for answer How many atoms in methane? Please explain the rule.

    That depends on how much methane you're dealing with. The answer to your question depends on whether or not you meant in a molecule of methane or in a mole of methane (or in some...

  • Waiting for answer What is tension?

    Tension refers to a stress which stretches rocks in two opposite directions. The rocks become longer in a lateral direction and thinner in a vertical direction. One important result of tensile stress is jointing in rocks. However, tensile stress is rare because most subsurface stress is compressive,...

  • Waiting for answer What is the difference between a land breeze and a sea breez...

    A sea breeze blows from the ocean over the land during the day, whereas a land breeze blows from the land to the ocean during the night. Breezes are caused by a temperature differenc...

  • Waiting for answer What's the difference between an inverse and a reciprocal?

    A 'reciprocal' means to divide 1 by the original function, for example, ##1/sin(x)##, but an 'inverse' of a trig function is an operation which determines the angle that led to a particular ratio. In everyday life inverse and reciprocal are sometimes used interchangeably. In all fields of math, how...

  • Waiting for answer How many men did the United States lose during World War II?...

    Military deaths: approximately 416,800 Civilian deaths: approximately 1,700 Total US losses: approximately 418,500 http://www.nationalww2museum.org/learn/education/for-students/ww2-h...

  • Waiting for answer How do you write 9/12 as a sum of unit fractions?

    ##9/12 = 1/2+1/4## This can be done in an unlimited number of ways. Which you choose depends on what you are trying to achieve. If you want to convey the meaning of "nine twelfths"...

  • Waiting for answer How many species of spiders are there?

    Over 43000 is the general rounding in litteratur More precisely there are 45 998 according to the world spider catalogue by Norman I. PLactnick World Spider Catalog (2016). World S...

  • Waiting for answer How can you increase gas pressure in a container?

    Pressure of the gas in a container is created by the number of collisions the molecules undergo with each other and with the surface of the container. Increasing the the number of collisions will increase the pressure. There are several ways to increase the number of collisions. You could add mo...

  • Waiting for answer What is the significance of covariance? What does it mean wh...

    Covariance is a linear measure of "connectivity." It is positive when the two variables you have at hand are positively connected. Covariance is a linear measure of "connectivity....

  • Waiting for answer What is the definition of cisterns? What are they and what a...

    cisterns are flattened sacs containing water or any fluid. Cisterns with respect to biology are micro flattened sacs that contain water.. they are somewhat like the picture above (...

  • Waiting for answer What heart rate is considered bradycardia? What heart rate i...

    Bradycardia means slow heart rate. Tachycardia means fast heart rate. Tachycardia means fast heart rate usually over 100 beats per minute. Bradycardia means slow heart rate usually...

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