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jarptica [38.1K]

3 years ago

5

Write the chemical equation for the following word equations. Include symbols for physical states in the equation.a. solid zinc

sulfide + oxygen gas → solid zinc oxide + sulfur dioxide gas. aqueous hydrochloric acid + aqueous barium hydroxide → aqueous barium chloride + water

1 answer:

ivanzaharov [21]3 years ago

7 0

Answer:

a.

ZnS(s) + O2(g) → ZnO(s) + SO2(g)

b.

HCl (aq) + Ba(OH)2(aq) → BaCl2(aq) + H2O

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2 years ago

A 1500 kg race car accelerates at a rate of about 9M /s2 as to how much force does the engine need to create for this to happen

IgorC [24]

Answer:

13500 N

Explanation:

According to newtons second law of motion

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2 years ago

William measures a test tube and finds that the mass of the test tube is 5g. He places the lone reactant in the test tube and fi

iogann1982 [59]

86 percent is the percent yield for this experiment if he expected to produce 5g of product.

Explanation:

Given that:

mass of test tube = 5 grams

mass of test tube + reactant is 12.5 grams

mass of reactant = ( mass of test tube + reactant ) - (mass of test tube)

mass of reactant = 12.5 -5

= 7.5 grams

when 7.5 grams of reactant is heated mass of test tube was found to be 9.3 grams.

so mass of product formed = 9.3 - 5

= 4. 3 grams of product is formed (actual yield)

However, he expected the product to be 5 grams (theoretical yield)

Percent yield = $\frac{actual yield}{theoretical yield}$ x 100

putting the values in the formula:

percent yield = $\frac{4.3}{5}$ x 100

= 86 %

86 percent is the percent yield.

5 0

3 years ago

Choose the larger atom from each pair, if possible.

Ksivusya [100]

Answer:

a. Sn or Si ⇒ Sn

b. Br or Ga ⇒ Ga

c. Sn or Bi ⇒ similar in size

d. Se or Sn ⇒ Sn

Explanation:

The larger atom has a larger atomic radius. We have to consider how varies the atomic radius for chemical elements in the Periodic Table. In a group (column), the atomic radius increases from top to bottom while in a period (file), it increases from right to left.

a. Sn or Si ⇒ Sn

They are in the <u>same group</u>. Sn is on the top, so it has a larger atomic radius.

b. Br or Ga ⇒ Ga

They are in the <u>same period</u>. Ga is located at the left so it has a larger atomic radius.

c. Sn or Bi ⇒ similar

They are not in the same group neither the same period. Bi is located more at the bottom, so it would be larger than Sn, but Bi is also at the right side, so it would be smaller than Bi. Thus, they have comparable sizes.

d. Se or Sn⇒ Sn

They are not in the same group neither the same period. Se is located at the top and right side compared to Sn, so Sn is the larger atom.

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2 years ago

Read the given chemical reaction.

k0ka [10]

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6 0

3 years ago

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