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2 years ago

This triple beam balance is used to measure ________ in grams. A) density B) mass C) volume D) weight

Chemistry

1 answer:

Alex787 [66]2 years ago

8 0

Answer:

B) mass

Explanation:

Triple beam balance -

It is an instrument , which is used for the measurement of the mass , in a very accurate and precise manner .

The error range of this balance is +/- 0.05 gram .

It consists of three beam , of three different sizes , where the difference in the beam shows the difference in the weights and readings .

Hence, from the given statement of the question,

The correct option is B. mass.

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Element X is in group 2, and element Y is in group 7, of the periodic table. which ions will be present in the compound formed w

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Answer:

Element X has valency 2 while Y Valency 2, element Y has high tendency of gaining electrons for its stability thus the compound formed will be B

elements X is positively charged while Y will be negatively charged

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2 years ago

Which elements are out of order in terms of atomic mass. co,Ni or Li,be or I,xe

valkas [14]

Answer:

The pair co,Ni is out of order in terms of atomic mass

Explanation:

For co,Ni

Atomic mass of Co = 58.9331 u

Atomic mass of Ni = 58.6934

For Li,be

Atomic mass of Li = 6.941 u

Atomic mass of be = 9.012182 u

For I,xe

Atomic mass of I = 126.90447 u

Atomic mass of Xe = 131.293 u

Hence, the pair co,Ni is out of order in terms of atomic mass

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2 years ago

What is meant by the term chemical reaction

pantera1 [17]

Answer:

<h3> $\huge{ \underline{ \underline { \bold{ \sf{ \orange{See \: below}}}}}}$ </h3>

Explanation:

▪️ $\underline{ \bold{ \sf{ \blue{Chemical \: reaction}}}}$

⇒The composition , decomposition or displacement of molecules of matter during chemical change is called chemical reaction.

▪️ $\underline{ \bold{ \sf{ \purple{ \: Further \: more \: explanation}}}}$

Various conditions bring about these changes. The chemical reactions are represented by chemicalequation. The compounds or elements that take part in chemical reaction are called reactant. They are written at the left side of an arrow that represent a change while the compound or elements that formed after the chemical change are called product. They are written at the right side of the arrow.

▪️ $\underline{ \bold{ \sf{ \purple{For \: example}}}}$

When nitrogen reacts with hydrogen to form ammonia :

Nitrogen + Hydrogen ⇒ Ammonia

N₂ + 3H₂ ⇒ 2NH₃

Presentation of a chemical reaction in the form of equation is called chemical equation . Chemical equation may be word equations or formula equations.

Hope I helped!

Best regards!!

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3 years ago