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3 years ago

What parts can you see?? What do you notice about the cells? What type of cell is it?

Chemistry

1 answer:

vekshin13 years ago

3 0

The parts clearly visible are the nucleus and cell wall. The rectangular shape of these cells are easily noticed and indicate that these are plant cells.

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If the trend in a property is periodic, it means it will

kotegsom [21]

Answer:

d) repeat

Explanation:

If the trend in a property is periodic, it means it will repeat on the periodic table.

Periodic properties on the table have a constant pattern as we move up or down a group or across a period from left to right.

This helps to predict some of the salient properties of elements as we move through the periodic table.
For example, on most periodic groups, metallicity increases as we move down the group and it decreases across the period.

8 0

3 years ago

Suppose Orville measures the length to be 1.55 cm. If the correct value is 1.32 cm, find Orville's % error.

Step2247 [10]

Answer:

Error in measure= 1.55-1.32= 0.23

Orville's % error = 0.23/1.32*100% = 17.42%

Explanation:

8 0

3 years ago

A sample of wood with a mass of 3.0 grams was burned in an open dish. The ashes weighed 1.2 grams. Considering the law of conver

yawa3891 [41]

Answer:

The rest of the wood was converted to gases

Explanation:

According to the law of conservation of mass, the mass on the reactant side must be equal to the mass on the product side. When wood is burned it forms ashes and gases. The mass of the ash plus gases must be equal to the mass of the wood and air used in burning it.

If 3g of wood were burned and the ashes produced weighs 1.2g, it means that the rest 1.8g have been converted to gases

6 0

4 years ago

When a solution containing 1.4000 g of Ba(NO3)2 and 2.4000 g of HSO3NH2 is boiled, a precipitate forms. One possible identity fo

Georgia [21]

Answer:

See explanation for detailed solution

Explanation:

The balanced reaction equation is Ba(NO3)2 + 2HSO3NH2 → Ba(SO3NH2)2 + 2HNO3

Number of moles of Ba(NO3)2 = 1.4 g/ 261.337 g/mol = 5.36 × 10^-3 moles

From the reaction equation;

1 mole of Ba(NO3)2 yields 1 mole of Ba(SO3NH2)2

5.36 × 10^-3 moles of Ba(NO3)2 yields 5.36 × 10^-3 moles of Ba(SO3NH2)2

For HSO3NH2

Number of moles = 2.4g/97.10 g/mol =0.0247 moles

2 moles of HSO3NH2 yields 1 mole of Ba(SO3NH2)2

0.0247 moles of HSO3NH2 yields 0.0247 ×1/2 = 0.0137 moles

Hence, Ba(NO3)2 is the limiting reactant

The theoretical yield of Ba(SO3NH2)2 is 5.36 × 10^-3 moles × 329.4986 g/mol = 1.766 g

Number of moles = mass/ molar mass

Molar mass = mass/ number of moles

Molar mass = 1.6925 g/5.36 × 10^-3 moles = 315.76 g

3 0

4 years ago

Pls explain ionization energy

Oliga [24]

Answer:the energy required by an atom to lose or gain electron (e-) to be able to form ions.either cation or anion.

Explanation:

to lose or gain e- an atom has to donate or receive e- to to this it requires the more easily it can lose an electron the more electro positive it is and the more easily it gains electron the more electro negative it is.

4 0

3 years ago