3 years ago

A material that is not easily scratched is _

Chemistry

1 answer:

ss7ja [257]3 years ago

3 0

This material is considered a “hard” material, usually having a high numerical value on the Mohs scale of hardness.

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1. To measure the pressure of an isolated gas you would use a barometer or a manometer?

Ronch [10]

Answer:

deeznutz

Explanation: 9+10

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3 years ago

Butane, C4H10 burns in oxygen. How many grams of water vapor, H2O, are produced by the combustion of 580 grams of butane at stan

zepelin [54]

Answer:

The answer to your question is 900 g of water vapor

Explanation:

Data

mass of H₂O = ?

mass of butane = 580 g

Balanced chemical reaction

2C₄H₁₀ + 13O₂ ⇒ 8CO₂ + 10H₂O

Process

1.- Calculate the molar weight of butane and water

Butane (C₄H₁₀) = 2[(12 x 4) + (1 x 10)]

= 2[48 + 10]

= 2[58]

= 116 g

Water (H₂O) = 10[(1 x 2) + (1 x 16)]

= 10[2 + 16]

= 10[18]

= 180 g

2.- Use proportions and cross multiplication to find the mass of water vapor

116 g of butane ------------- 180 g of water

580 g of butane ---------- x

x = (580 x 180) / 116

x = 900 g of water vapor

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3 years ago

What is the noble gas electron configuration of bismuth (Bi)? A. [Kr] 6s2 6p3 B. [Xe] 6s2 6p3 C. [Xe] 4f14 5d10 6s2 6p3 D. [Kr]

OlgaM077 [116]

The answer is C) Xe 4f14 5d10 6s2 6p3

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4 years ago

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When MgCO3(s) is strongly heated, it produces solid MgO as gaseous CO2 is driven off.

AveGali [126]

$MgCO_3--^T-->MgO + CO_2\uparrow$

the oxidation number of carbon in MgCO3 = +IV
the oxidation number of carbon in CO2 = +IV

so, there is no change

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4 years ago

What are the factors effecting the rate of reaction?

erastova [34]

answer is on photo please give marks

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